阅读说明：本技术 一种悬浮隧道接岸系统及其悬浮隧道、悬浮隧道施工方法 (Suspension tunnel shore connection system, suspension tunnel and suspension tunnel construction method ) 是由 林巍 于 2019-11-19 设计创作，主要内容包括：本发明公开了一种悬浮隧道接岸系统、悬浮隧道及悬浮隧道施工方法,其中悬浮隧道设计方法是沿管体一端或两端分别施加轴向拉力；该悬浮隧道接岸系统包括位于管体端部的接头段,接头段能够沿轴向移动,接头段上连接有用于施加轴向拉力的拉力装置；该悬浮隧道包括管体,中空内腔,管体包括悬浮段及位于两端的接岸系统,两个接头段上均设有拉力装置。本发明所述悬浮隧道的设计方法和结构,通过施加管体轴向拉力,能够显著增加整个管体的水平刚度和竖向刚度,提高了管体结构自振频率,提高了悬浮隧道安全性和可靠性；有利于锚在海床或河床上的缆索和基础的长期使用,施工风险也更低,造价更低,有效节约了施工成本,易于实施推广。(The invention discloses a suspension tunnel shore connection system, a suspension tunnel and a suspension tunnel construction method, wherein the suspension tunnel design method is that axial tension is respectively applied along one end or two ends of a pipe body; the suspension tunnel shore connection system comprises a joint section positioned at the end part of a pipe body, wherein the joint section can move along the axial direction, and a tension device for applying axial tension is connected to the joint section; this suspension tunnel includes the body, and cavity inner chamber, body include the suspension section and lie in the shore system that connects at both ends, all are equipped with the pulling force device on two joint sections. According to the design method and the structure of the suspension tunnel, the horizontal rigidity and the vertical rigidity of the whole pipe body can be obviously increased by applying the axial tensile force of the pipe body, the natural vibration frequency of the pipe body structure is improved, and the safety and the reliability of the suspension tunnel are improved; the anchor is beneficial to the long-term use of the cable and the foundation anchored on the sea bed or the river bed, has lower construction risk and lower construction cost, effectively saves the construction cost, and is easy to implement and popularize.)

1. A design method of a suspension tunnel is characterized in that axial tension is respectively applied to one end or two ends of a pipe body of the suspension tunnel.

2. The method as claimed in claim 1, wherein a plurality of oblique forces are applied along each end of the suspension tunnel tube, and the total force of the axial components of all the oblique forces along the suspension tunnel is the axial tension applied to the end of the suspension tunnel.

3. The method according to claim 2, wherein the stress points corresponding to the oblique forces applied to each end of the floating tunnel pipe body are respectively disposed at different positions along the length direction of the surface of the floating tunnel pipe body.

4. The method as claimed in claim 3, wherein all the stress points along the same cross section of the suspension tunnel pipe are symmetrically arranged, and the oblique force applied to each stress point is the same, and the included angle between the oblique force and the axis of the suspension tunnel is the same.

5. A method according to claim 2, wherein all of the oblique forces applied along each end of the tube of the suspension tunnel are at an angle of less than 30 ° to the axis of the suspension tunnel.

6. The method of claim 2, wherein the magnitude of the axial tension is adjustable.

7. The method as claimed in any one of claims 1 to 6, wherein the joint sections at both ends of the pipe body of the suspension tunnel pass through the shore foundation.

8. The method as claimed in any one of claims 1 to 6, wherein the suspension tunnel is an anchor-pull type suspension tunnel in which the suspension section is anchored to the river bed or the seabed by an anchor pulling system, or a buoy type suspension tunnel in which the suspension section is connected to a buoy, or a buoy-anchor type suspension tunnel in which the suspension section is connected to both the buoy and the anchor pulling system.

9. The suspended tunnel shore connection system is characterized by comprising a joint section located at the end part of a suspended tunnel pipe body, wherein the joint section can move along the axial direction, and a tension device is connected onto the joint section and used for applying axial tension to the joint section.

10. The suspended tunnel shore connection system of claim 9, wherein said coupling segments pass through the shore foundation and are axially movable relative to the shore foundation.

11. The system of claim 9, wherein the tension device is connected to the connector segment at one end and to the shore foundation or fixed structure at the other end.

12. The system of claim 11, wherein the tension device comprises a plurality of cables arranged on the periphery, one end of each cable is arranged along the periphery of the joint section of the suspension tunnel, and the other end of each cable is anchored on the shore foundation or a fixed structure.

13. The system of claim 12, wherein all of the cables are disposed along the length of the surface of the suspended tunnel junction section.

14. The system of claim 12, wherein all the cables arranged along the same section of the joint section of the suspension tunnel have the same included angle with the axis of the suspension tunnel and are symmetrically arranged.

15. The system of claim 12, wherein the cables are obliquely connected to the connector segments of the suspension tunnel, and each cable forms an angle of less than 30 ° with the axis of the suspension tunnel.

16. The system of claim 12, wherein each cable of the tension device is provided with a tension adjusting mechanism.

17. The system of claim 16, wherein the tension adjusting mechanism provided on each cable comprises an anchor chamber at an end of the cable, the anchor chamber being provided with an adjuster capable of adjusting the tension of the cable, all the anchor chambers being provided on the shore foundation.

18. A suspended tunnel shore connection system according to claim 12, wherein each of said connector segments is provided with a plurality of lugs for connecting said cables.

19. A suspended tunnel shore connection system according to claim 12, characterized in that said cable ends are anchored in pre-cast concrete blocks located in shore foundations or in steel structures located on shore ground.

20. The suspended tunnel shore connection system according to any one of claims 9 to 19, wherein each of said connector segments comprises an annular steel deck and a hollow cavity provided on the outer layer, and all of said mooring lugs are connected to said steel deck.

21. The system of claim 20, wherein a ring-shaped reinforced concrete layer is disposed on an inner side of the steel plate layer.

22. The system of claim 21, wherein a plurality of shear members are disposed in the reinforced concrete layer, one end of each shear member being connected to the steel deck.

23. The system of claim 21, wherein an annular rubber layer is further disposed between the steel deck and the reinforced concrete layer.

24. The system of any one of claims 9 to 19, wherein a circumferential water stopping member is further provided between each joint section and the shore foundation, and the circumferential water stopping member is sleeved on the joint section.

25. The suspended tunnel shore connection system according to claim 24, wherein said circumferential water stopping member is an elastic structure.

26. A suspended tunnel comprising a tubular body having a hollow interior, said tubular body comprising a suspended section, said suspended section having a shore connection system as claimed in any one of claims 9 to 25 connected to each end thereof.

27. A suspension tunnel according to claim 26, wherein the axial tension applied by the two tension means on the two landing systems is the same magnitude and opposite in direction.

28. The suspension tunnel of claim 26, wherein the suspension section and the two connector sections each comprise steel slabs and reinforced concrete layers within the steel slabs, all of the steel slabs being integral structural members and all of the reinforced concrete layers being integral structural members.

29. A suspension tunnel according to claim 26, wherein the cross-sectional shape of the tubular body is circular, square, oval or horseshoe.

30. A suspension tunnel according to claim 26, wherein the suspension section comprises a plurality of tubular body units spliced together.

31. A suspension tunnel according to any one of claims 26 to 30, wherein the length of the tubular body between two shore foundations is 50 to 3000 m.

32. A suspension tunnel according to claim 31, wherein the length of the tubular body between two shore foundations is 200-2000 m.

33. A suspension tunnel according to any of claims 26 to 30, wherein the suspension section is provided with anchoring means adapted to anchor to the bed or sea bed, or wherein the suspension section is connected to pontoon means adapted to float on the water surface.

34. A suspended tunnel comprising a tubular body having a hollow interior, said tubular body comprising a suspended section, said suspended section having one end connected to a shore connection system according to any one of claims 9 to 25 and the other end connected to a tension stop section secured to a shore foundation.

35. The levitation tunnel as recited in claim 34, wherein the pull stop section comprises radial protrusions at ends of the levitation section, and the shoreside is provided with recessed portions adapted to the protrusions.

36. A suspension tunnel according to claim 35, wherein the raised portion is a structural member integrally formed with the suspended section.

37. A suspension tunnel according to claim 34, wherein the tension stop section is a gravity caisson structure attached to the ends of the suspension section.

38. A suspension tunnel according to claim 37, wherein the gravity caisson structure is a steel or reinforced concrete caisson structure.

39. The suspension tunnel according to claim 34, wherein the tension stop section is a plurality of tensile anchors connected to the end of the suspension section, all of the tensile anchors being anchored to the shoreside.

40. The suspension tunnel of claim 34, wherein the suspension section and the coupling section each comprise steel slabs and reinforced concrete layers disposed within the steel slabs, all of the steel slabs being integral structural members and all of the reinforced concrete layers being integral structural members.

41. A suspension tunnel according to claim 34, wherein the cross-sectional shape of the tubular body is circular, square, oval or horseshoe.

42. A suspension tunnel according to claim 34, wherein the suspension section comprises a plurality of tubular body units spliced together.

43. A suspension tunnel according to any one of claims 34 to 42, wherein the length of the tubular body between two shore foundations is 50 to 3000 m.

44. A suspension tunnel according to claim 43, wherein the length of the tubular body between two shore foundations is 200-2000 m.

45. A suspension tunnel according to any of claims 34 to 42, wherein the suspension section is provided with anchoring means adapted to anchor to the bed or sea bed, or wherein the suspension section is connected to pontoon means adapted to float on the water surface.

46. The construction method of the suspension tunnel is characterized by comprising the following construction steps:

manufacturing a suspension section and two joint sections of a suspension tunnel;

step two, constructing through holes for matching two shoreside foundations of the suspended tunnel joint section;

step three, respectively enabling the two joint sections to penetrate through holes of the shoreside foundation and be connected to the shoreside foundation through the tension device;

step four, connecting two ends of the suspension section with the two joint sections respectively to form a suspension tunnel pipe body;

fifthly, an anchoring device capable of being anchored on a riverbed or a seabed is installed on the suspension section, or a buoy device capable of floating on the water surface is connected to the suspension section;

and sixthly, applying axial tension to the tension devices on the two joint sections, applying tension to the anchoring device, and finally finishing the construction of the suspension tunnel after adjusting each tension to meet the stress requirement.

47. The construction method of the suspension tunnel is characterized by comprising the following construction steps:

manufacturing a suspension section, a joint section and a pull-stopping section of a suspension tunnel;

constructing a through hole for matching with a bank foundation of the suspended tunnel joint section;

thirdly, enabling the joint section to penetrate through a through hole of the shoreside foundation and be connected to the shoreside foundation through the tension device;

step four, constructing a pull stopping section matched with the suspension tunnel, and installing the pull stopping section on the shoreside foundation;

connecting two ends of the suspension section with the joint section and the pull stopping section respectively to form a suspension tunnel pipe body;

step six, an anchoring device capable of being anchored on a riverbed or a seabed is installed on the suspension section, or a floating barrel device capable of floating on the water surface is connected to the suspension section;

and step seven, applying axial tension to the tension device on the joint section, applying tension to the anchoring device, and finally finishing the construction of the suspension tunnel after adjusting each tension to meet the stress requirement.

Technical Field

The invention relates to the technical field of suspension tunnel engineering, in particular to a suspension tunnel shore connection system, a suspension tunnel and a suspension tunnel construction method.

Background

The underwater floating tunnel is a new type of traffic mode crossing water, and is generally characterized by that the self-weight of structure, buoyancy and anchoring system placed on the underwater foundation are combined together to maintain the balance and stability of floating tunnel in water. The suspension tunnel has a very complex structure and working condition environment, so that no precedent for successful construction exists in the world at present, and the technology of the suspension tunnel still stays in the technical conception and test stage.

The technical idea of the existing suspension tunnel structure is generally divided into an anchor-pull type and a float type. The anchoring-pulling type suspension tunnel pipe body has the structural buoyancy greater than gravity, and the upward floating pipe body is anchored on the sea bed or river bed through the cable; the gravity of the float-type suspension tunnel pipe body is greater than the buoyancy, and the pipe body sinking downwards is anchored on the water through the float. The cables of the anchor-pull type suspension tunnel are arranged vertically and obliquely, and the vertical cables only provide vertical restraint for the pipe body. The oblique cables provide vertical constraint and horizontal constraint for the tube body, namely the stiffness contribution to the suspended tunnel structure system comprises vertical stiffness contribution and horizontal stiffness contribution. The connection between the buoy and the pipe body of the buoy type suspension tunnel is rigid, and the buoy type suspension tunnel contributes to the rigidity of the suspension tunnel structure system only by vertical rigidity through the change of the water buoyancy of the buoy type suspension tunnel.

In addition, the existing technical idea is that the connection between the two ends of the pipe body of the two kinds of floating tunnels and the shore (i.e. the shore connection joint) comprises two modes of fixed connection and hinging no matter the anchoring-pulling type floating tunnel or the buoy type floating tunnel; the shore connection joint can restrict the translation and rotation of the end part of the pipe body in a fixedly connected mode, and only restricts the translation of the end part of the pipe body in a hinged mode. Both landing joints provide the horizontal and vertical stiffness contribution of the suspended tunnel structure mainly through the bending resistance of the pipe sections. That can predict promptly to obtain, the section area that suspension tunnel body adopted is bigger, and its body section bending modulus is bigger, and suspension tunnel structure system's horizontal rigidity and vertical rigidity are all bigger.

The inventor finds that the float-type suspension tunnel and the anchor-pull type suspension tunnel have the following technical problems in the research of the project:

for the float-type suspension tunnel, the float can only provide vertical restraint through the change of hydrostatic buoyancy, and cannot provide horizontal restraint, namely cannot contribute to the horizontal rigidity of the suspension tunnel structure system, so that the horizontal rigidity of the float-type suspension tunnelAll contributions come from the confinement effect of the landing joint and the pipe body section flexural modulus. When the suspension tunnel spans a longer water area, no matter how large the section of the pipe body is, relative to the length of the suspension section of the pipe body, the whole pipe body is of a 'slender rod' structure, the horizontal rigidity of the pipe body is still weaker, and further the deflection of the suspension tunnel structure under the load action of external waves, water flows and the like is too large, so that the structure safety is influenced, and the acceleration of the tunnel in the operation period is too large (generally not more than 0.3-0.5 m/s)²) Thereby influencing the driving safety and the comfortable experience of passengers.

For the anchor-pull type suspension tunnel, there are problems:

1. with the increase of water depth, anchor cables anchored on the sea bed or river bed are longer and longer, the constraint effect on the suspension tunnel structure system is weaker and weaker, the contribution to the horizontal rigidity of the structure system is smaller and smaller, and the same problem of the floating-type suspension tunnel exists.

2. The suspension tunnel is hardly exposed to the influence of waves and water currents in the nature, and researches generally consider that vertical movement of a suspension tunnel pipe body caused by the vertical movement can possibly cause the elastic shock phenomenon (Slack and snap) of a cable, the elastic shock phenomenon is that the cable with initial tension is completely loosened due to the movement of the suspension tunnel pipe body and then is suddenly tightened when the suspension tunnel pipe body is recovered, the stress of the cable at the moment can reach multiple times of the initial tension, so that severe shock is generated in the suspension tunnel, the cable is broken or damaged, the long-term safety of the suspension tunnel is influenced, and the operation and maintenance workload is increased.

To above two problems, the current technology solves the thinking through the suspension tunnel body section that sets up big buoyancy ratio or remaining buoyancy to ensure that the cable keeps great initial tension all the time, thereby avoid taking place the bullet phenomenon of shaking. However, the requirement of the anchor-pulling type suspension tunnel on the uplift bearing capacity of the deepwater foundation is increased due to the solution, and the construction cost of the suspension tunnel can be greatly improved due to the extremely high cost of the deepwater foundation treatment, so that the economical efficiency of the design method of the anchor-pulling type suspension tunnel is reduced, and even the suspension tunnel foundation cannot meet the construction requirement due to the excessive residual buoyancy requirement.

In addition, the inventor also finds that when the horizontal rigidity of the two suspension tunnel structures is weak, the main vibration frequency is low, the two suspension tunnel structures are easy to encounter a natural wave high-energy area, the resonance risk is large, and the safety of the suspension tunnel is seriously influenced.

Disclosure of Invention

The invention aims to overcome the defects that the existing research on the suspension tunnel still stays in the technical conception and the test stage in the prior art, the scheme of the technical conception of the float-type suspension tunnel has the problem that the horizontal rigidity is still weak, the safety of the structure and the driving safety are influenced, the scheme of the technical conception of the anchor-pull type suspension tunnel has the defects that the horizontal rigidity is still weak, the phenomenon of elastic shock is easy to occur, the two suspension tunnel structures are easy to have high risk of sending resonance in a natural wave high-energy area, and the safety of the suspension tunnel is seriously influenced, so that a suspension tunnel shore-connecting system and a suspension tunnel thereof are provided, and a construction method of the suspension tunnel is also provided.

In order to achieve the above purpose, the invention provides the following technical scheme:

the invention firstly provides a design method of a suspension tunnel, which applies axial tension along one end or two ends of a pipe body of the suspension tunnel respectively.

Compared with the technical problem that the existing float-type suspension tunnel is weak in horizontal rigidity and the technical problem that the existing anchor-pull type suspension tunnel is still weak in horizontal rigidity and prone to elastic shock, the method for designing the suspension tunnel provided by the invention has the advantages that the axial tension of the pipe body is applied to one end or two ends of the suspension tunnel respectively (the axial tension is the tension applied to the pipe body towards the outer side along the axial direction), so that the horizontal rigidity and the vertical rigidity of the whole pipe body of the suspension tunnel can be obviously increased, the movement of the pipe body is additionally restrained, the self-vibration frequency of the pipe body of the suspension tunnel is improved, a high-energy area of a sea wave frequency spectrum can be avoided, the deflection and the acceleration of the pipe body of the suspension tunnel can be reduced, meanwhile, the design redundancy is increased, and the safety and the reliability of the suspension tunnel are improved. Due to the increase of axial tension, the suspension tunnel pipe body is changed into a high-frequency self-vibration structure system, such as a string, through vibration with faster frequency, the damping effect can be effectively achieved by combining water around the pipe body, when the suspension tunnel moves by waves and water flow, the high-frequency vibration of the pipe body can enable energy to be consumed faster, the characteristic means that the consumption of the total movement energy of the structure can be concentrated on the pipe body more for the anchor-pull type suspension tunnel, the stress variation quantity of the cable anchored on the seabed or the riverbed can be effectively reduced, the long-term use of the cable anchored on the seabed or the riverbed and the foundation is facilitated, the construction cost is effectively saved, and the maintenance difficulty is effectively reduced.

In addition, the design method of the suspension tunnel has the technical effects that the ① buoy type suspension tunnel adopts a mode of enlarging a section pipe body, the bending rigidity of the pipe body can be effectively increased by adopting a large section pipe body, the ② anchor-pull type suspension tunnel adopts more deepwater cables to improve the horizontal rigidity of the pipe body, the ③ anchor-pull type suspension tunnel improves the residual buoyancy and the requirement on the deepwater foundation uplift force, and compared with the ①②③ design methods, the design method of the suspension tunnel is easier to realize, lower in construction risk, lower in manufacturing cost and easier to implement and popularize in engineering.

Preferably, a plurality of oblique forces are applied along each end of the suspension tunnel, the resultant force of the axial component forces of all the oblique forces along the suspension tunnel is the axial tension applied to the end of the suspension tunnel, and the radial component forces of all the corresponding oblique forces along the suspension tunnel cancel each other out to make the resultant radial force 0.

The mode of applying a plurality of oblique forces at each end part of the suspension tunnel is adopted, the resultant force of the axial component forces of the plurality of oblique forces at the suspension tunnel is used as the axial tension force applied to each end of the suspension tunnel, and compared with the mode of directly applying axial tension forces at two ends of the suspension tunnel, the suspension tunnel is easier to realize and has higher operability, and the vertical rigidity and the overall stability of the end part of the suspension tunnel can be increased.

Preferably, the stress points corresponding to each oblique force applied to each end of the floating tunnel pipe body are respectively arranged at different positions along the length direction of the surface of the floating tunnel pipe body.

This each slant power sets up through each position of axial length direction along the suspension tunnel body surface, avoids only setting up along same cross-section's circumference, can effectively avoid the stress concentration of suspension tunnel body, makes each position stress point of suspension tunnel tip homogenization as far as possible, promotes suspension tunnel stress structural stability.

Preferably, follow all stress points that the same cross-section of suspension tunnel body set up are the symmetry setting, and every the slant power size that the stress point received is the same, the slant power with the contained angle of suspension tunnel axis is also the same. The stress point and the stress magnitude of each end part of the suspension tunnel pipe body at each position can be effectively guaranteed to be the same, the magnitude of the oblique force can be conveniently adjusted subsequently, and all the corresponding oblique forces can be effectively guaranteed to be mutually offset along the radial component force of the suspension tunnel so as to enable the radial resultant force to be 0.

Preferably, included angles between all oblique forces applied along each end of the suspension tunnel pipe body and the axis of the suspension tunnel are smaller than 30 degrees, so that the vertical rigidity of the suspension tunnel pipe body is ensured to be larger, the axial component force of each oblique force is larger, the resultant force of the axial component forces, namely the axial tension force, is also larger, and the horizontal rigidity of the suspension tunnel is effectively improved.

Preferably, the axial tension can be adjusted, and the self-vibration frequency of the suspended tunnel pipe body structure can be easily adjusted in the operation period by adjusting the axial tension, that is, the suspended tunnel pipe body structure can be actively adjusted in self natural frequency to adapt to the working condition environment, so that the safety of the suspended tunnel can be guaranteed.

Preferably, the joint sections at the two ends of the suspension tunnel pipe body penetrate through the shore foundation. The joint sections at two ends of the pipe body of the suspension tunnel directly penetrate through the hollow channel of the shoreside foundation, the joint sections are not fixedly connected to the hollow channel of the shoreside foundation and only penetrate through the hollow channel of the shoreside foundation, and the joint sections are fixed on the shoreside foundation through a plurality of cables which are arranged on the pipe body and provide oblique force, so that the joint sections of the suspension tunnel are fixed. The shore foundation is a sand layer, a soil layer, a rock layer or a mixed soil layer which is positioned on a river bank, a lake bank or a coast and has certain bearing capacity, or a composite layer of the above foundations.

Preferably, each annular water stop member is further arranged between the joint section and the shore foundation, and the annular water stop members are sleeved on the joint sections.

Further, the annular water stop member is an elastic structural member.

The hollow channel of the shore foundation can be designed to be larger than the joint section in size, so that the joint section has a gap when being installed in the hollow channel of the shore foundation, the annular water stopping member is arranged at the gap, the annular water stopping member is simultaneously connected with the pipe body and the shore foundation and can have certain elasticity to adapt to certain axial relative displacement, and the annular water stopping member still keeps watertight after the joint section receives axial tension and the displacement.

Preferably, the suspension tunnel is an anchor-pull type suspension tunnel, wherein the suspension section is anchored on a river bed or a sea bed through an anchor pulling system, or the suspension section is a buoy type suspension tunnel connected to a buoy, or the buoy-anchor type suspension tunnel is a buoy-anchor type suspension tunnel, wherein the buoy and the anchor pulling system are connected to the suspension section at the same time.

The design method of the suspension tunnel is suitable for the anchor-pull type suspension tunnel which is commonly anchored on a riverbed or a seabed at present, or two suspension tunnel design modes that the suspension section passes through a float-type suspension tunnel connected to a float bowl, or the combined float bowl-anchor-pull type suspension tunnel that the suspension section is simultaneously connected with the float bowl and the anchor pulling system.

The invention also provides a suspended tunnel shore connection system which comprises a joint section positioned at the end part of the suspended tunnel, wherein the joint section can move along the axial direction, and the joint section is connected with a tension device which is used for applying axial tension to the joint section.

Compared with the prior float-type suspension tunnel, the suspension tunnel shore connection system has the technical problem of weaker horizontal rigidity, and compared with the technical problem that the horizontal rigidity of the scheme of the prior anchoring-pulling type suspension tunnel technical idea is still weak and the phenomenon of elastic shock is easy to occur, by adopting the joint section of the suspension tunnel to be connected with the tension device, as the tension device can apply axial tension to the joint section, the joint section can freely stretch and move along the axial direction after being subjected to axial tension, thereby obviously increasing the horizontal rigidity and the vertical rigidity of the whole pipe body of the suspension tunnel, plays an additional restraint role on the motion of the tube body, thereby improving the natural vibration frequency of the suspension tunnel tube body, avoiding the high energy region of the wave frequency spectrum, reducing the deflection and the acceleration of the suspension tunnel tube body, meanwhile, the design redundancy is increased, so that the safety and the reliability of the suspension tunnel are improved. The suspension tunnel pipe body is changed into a high-frequency self-vibration structure system, such as a string, through vibration with faster frequency, the damping effect can be effectively achieved by combining water around the pipe body, and when the suspension tunnel moves by waves and water flow in all directions, the high-frequency vibration of the pipe body can enable energy to be consumed faster.

Preferably, the coupling segment passes through the shore foundation and is axially movable relative to the shore foundation. The joint section penetrates through the shore foundation and is not fixedly or hinged to the shore foundation, and the joint section can axially move relative to the shore foundation, so that the influence of the tensile device on improving the horizontal rigidity of the pipe body by the aid of counterforce provided for the joint section by the shore foundation when the joint section is under tensile force of the tensile device is avoided.

Preferably, one end of the tension device is connected to the joint section, the other end of the tension device is connected to the shoreside foundation or the fixed structure, and the joint section of the suspended tunnel pipe body can be effectively kept fixed relative to the shoreside foundation or the fixed structure by directly connecting the tension device to the shoreside foundation or the fixed structure. The fixed structure may be a fixed steel structure installed on the shore foundation, which may be installed on the ground of the shore foundation, on the dam or even below the water surface.

Preferably, the tension device comprises a plurality of cables, one ends of the cables are arranged along the periphery of the joint section of the suspension tunnel, and the other ends of the cables are anchored on the periphery of the shore foundation or the fixed structure.

Because the volume of the suspension tunnel pipe body is large, the suspension tunnel pipe body can hardly provide stable axial tension through one or two cables, therefore, the tension device comprises a plurality of cables arranged along the periphery of the suspension tunnel joint section, the cables can respectively provide tension for each part of the suspension tunnel joint section along the circumferential direction, and the resultant force of the axial component of the tension provided by all the cables is used as the axial tension applied to each end of the suspension tunnel; because the pulling force provided by each cable dispersed to the required direction is smaller, the method is easier to realize in practical engineering and operate and implement, and the stability of the suspension tunnel can be kept when the suspension tunnel is subjected to the motion impact of waves and water currents in all directions.

Preferably, all of said cables are arranged along the length of the surface of said suspended tunnel junction section.

Each cable sets up along each position of axial length direction on suspension tunnel body surface, can provide the slant power in each position on suspension tunnel body surface, avoids only leading to the fact stress concentration to suspension tunnel body along the cable that the circumference of same cross-section set up to can make each position stress point of suspension tunnel tip distribute the homogenization as far as possible, with effective suspension tunnel stress structural stability that promotes.

Preferably, all the cables arranged along the same section of the joint section of the suspension tunnel have the same included angle with the axis of the suspension tunnel and are arranged mutually. Therefore, the oblique force of each cable is easier to adjust, and the axial tension borne by the joint section of the suspension tunnel is easier to adjust.

Preferably, the cables are all joint sections obliquely connected to the suspension tunnel, and each cable forms an included angle of less than 30 degrees with the axis of the suspension tunnel. Every cable is the slant and connects the joint section in suspension tunnel, and it compares directly to exert axial pulling force along suspension tunnel both ends axial, realizes more easily and more has the operability, but also can increase the vertical rigidity and the overall stability of suspension tunnel tip.

Preferably, each cable of the tension device is provided with a tension adjusting mechanism. The tension device can adjust the axial tension applied to the joint section, the tension of each cable can be adjusted, the tension of all the cables can be adjusted in the axial component, the axial tension applied to the joint section can be adjusted, the self-vibration frequency of the suspension tunnel pipe body structure can be adjusted, the suspension tunnel pipe body structure can be adjusted actively to adapt to different working conditions, and the safety of the suspension tunnel can be guaranteed.

Preferably, the tension adjusting mechanism arranged on each cable comprises an anchor chamber positioned at the end of the cable, the anchor chamber is provided with an adjuster capable of adjusting the tension of the cable, and all the shore anchor chambers are arranged on the shore foundation. The tension of each cable is adjusted through the anchor chamber, and the device is more convenient and reliable. In addition, the length of the cable is flexibly adjusted and arranged according to the onsite shoreside foundation, and the cable can be made of structural members made of steel wire locks, steel pipes, high-strength cables and the like.

Preferably, each joint segment is provided with a plurality of mooring lugs for connecting the cable, or other connectors for connecting the cable.

Preferably, the cable tip anchor is in the precast concrete piece that is located bank basis, perhaps anchor in the steel structure spare that is located bank ground on, and the steel structure spare can have great tensile strength, under the axial tensile load effect at both ends, can provide the great horizontal rigidity of suspension tunnel body.

Preferably, each joint section comprises an annular steel plate layer arranged on the outer layer and a hollow inner cavity, all the cable lugs are connected to the steel plate layer, and the cable lugs and the steel plate layer can be an integrally formed structure body.

Preferably, the steel deck inboard still is equipped with the reinforced concrete layer of annular, under the same structural strength circumstances of guaranteeing, adopts steel deck to establish reinforced concrete layer in, can effectively reduce construction cost.

Preferably, a plurality of shear pieces with one ends connected to the steel plate layer are arranged in the reinforced concrete layer so as to improve the connection strength between the concrete layer and the steel plate layer.

Preferably, an annular rubber layer is further arranged between the steel plate layer and the reinforced concrete layer so as to improve the anti-collision and energy dissipation effects of the suspension tunnel.

Preferably, the inner side of the reinforced concrete layer is also provided with a fireproof plate layer so as to improve the fireproof capacity when fire occurs in the suspension tunnel.

Preferably, the inner side of the fireproof slab layer is also provided with a watertight steel plate layer with the thickness of 0.5-3cm so as to improve the waterproof requirement of the tunnel.

The invention also provides a suspension tunnel, which comprises a pipe body, wherein the pipe body is provided with a hollow inner cavity and comprises a suspension section, and the two ends of the suspension section are respectively connected with the shore connecting system.

This suspension tunnel structure, set up as foretell shore system of connecing through the suspension section both ends that adopt at the body, wherein the joint section directly passes the bank basis, then rely on the pulling force device on the joint section to provide axial tension to the joint section, thereby can show horizontal rigidity and the vertical rigidity that increases the whole body in suspension tunnel, thereby play extra restraint effect to the body motion, improve suspension tunnel body natural vibration frequency, can avoid wave frequency spectrum high energy area, can reduce suspension tunnel body amount of deflection and acceleration, simultaneously owing to still increased the design redundancy, the security and the reliability in suspension tunnel have been improved. The suspension tunnel pipe body is changed into a high-frequency self-vibration structure system, such as a string, through vibration with faster frequency, the damping effect can be effectively achieved by combining water around the pipe body, and when the suspension tunnel moves by waves and water flow in all directions, the high-frequency vibration of the pipe body can enable energy to be consumed faster.

Preferably, the axial tension applied by the two tension devices on the two shore connection systems is the same in magnitude and opposite in direction.

Preferably, the suspension section and the two joint sections respectively comprise a steel plate layer and a reinforced concrete layer positioned in the steel plate layer, all the steel plate layers are integral structural members, and all the reinforced concrete layers are integral structural members.

Preferably, the cross-sectional shape of body is circular, square, oval or horseshoe to the passageway demand that different underwater operating condition environment adopted is adapted.

Preferably, the suspension section comprises a plurality of pipe body units which are spliced. Preferably, the length of the pipe body between two shore foundations is 50-3000 m.

Further preferably, the length of the pipe body between two shore foundations is 200-2000 m. . Considering that the axial tension can generate a large enough influence factor on the horizontal rigidity of the suspension tunnel tube body, the length of the adaptive suspension tunnel tube body is not too long, and according to the design requirement, the length of the tube body of the suspension tunnel between two shoreside foundations is 50-3000m, wherein 200-2000m is more preferable. Preferably, the suspension section is provided with an anchoring device capable of being anchored on a river bed or a sea bed, or the suspension section is connected with a buoy device capable of floating on the water surface.

The invention also provides a suspension tunnel, wherein the tube body is provided with a hollow inner cavity and comprises a suspension section, one end of the suspension section is connected with the shore connection system, and the other end of the suspension section is connected with a pull stop section fixed on a shore foundation.

Preferably, the pull-stopping section comprises a radial protruding portion arranged at the end of the suspension section, and the shoreside foundation is provided with a groove portion matched with the protruding portion.

Preferably, the boss is a structural member integrally formed with the suspended section.

Preferably, the pull-stopping section is a gravity type caisson structure connected to the end part of the suspension section.

Preferably, the gravity caisson structure is a steel or reinforced concrete caisson structure.

Preferably, the pull-stopping section is a plurality of tensile anchor rods connected to the end of the suspension section, and all the tensile anchor rods are anchored on the shore foundation.

Preferably, the suspension section and the two joint sections respectively comprise a steel plate layer and a reinforced concrete layer positioned in the steel plate layer, all the steel plate layers are integral structural members, and all the reinforced concrete layers are integral structural members.

Preferably, the cross-sectional shape of body is circular, square, oval or horseshoe to the passageway demand that different underwater operating condition environment adopted is adapted.

Preferably, the suspension section comprises a plurality of pipe body units which are spliced. Preferably, the length of the pipe body between two shore foundations is 50-3000 m.

The invention also provides a construction method of the suspension tunnel, which comprises the following construction steps:

manufacturing a suspension section and two joint sections of a suspension tunnel;

step two, constructing through holes for matching two shoreside foundations of the suspended tunnel joint section;

step three, respectively enabling the two joint sections to penetrate through holes of the shoreside foundation and be connected to the shoreside foundation through the tension device;

step four, connecting two ends of the suspension section with the two joint sections respectively to form a suspension tunnel pipe body;

fifthly, an anchoring device capable of being anchored on a riverbed or a seabed is installed on the suspension section, or a buoy device capable of floating on the water surface is connected to the suspension section;

and sixthly, applying axial tension to the tension devices on the two joint sections, applying tension to the anchoring device, and finally finishing the construction of the suspension tunnel after adjusting each tension to meet the stress requirement.

The construction method of the suspension tunnel comprises the steps of manufacturing a suspension section and two joint sections of the suspension tunnel, connecting the two joint sections to a shore foundation by using tension devices respectively, splicing the two joint sections in sections to form the suspension section, connecting the suspension section to the two joint sections respectively, adjusting axial tension of the two tension devices to a pipe body, and finally forming the suspension tunnel; the construction method is simple to operate, can effectively reduce the stress variation quantity of the cable anchored on the sea bed or the river bed, is beneficial to the long-term use of the cable and the foundation anchored on the sea bed or the river bed, has lower construction risk and lower construction cost, effectively saves the construction cost, effectively reduces the maintenance difficulty, and is easy for engineering implementation and popularization.

The invention also provides a construction method of the suspension tunnel, which comprises the following construction steps:

manufacturing a suspension section, a joint section and a pull-stopping section of a suspension tunnel;

constructing a through hole for matching with a bank foundation of the suspended tunnel joint section;

thirdly, enabling the joint section to penetrate through a through hole of the shoreside foundation and be connected to the shoreside foundation through the tension device;

step four, constructing a pull stopping section matched with the suspension tunnel, and installing the pull stopping section on the shoreside foundation;

connecting two ends of the suspension section with the joint section and the pull stopping section respectively to form a suspension tunnel pipe body;

step six, an anchoring device capable of being anchored on a riverbed or a seabed is installed on the suspension section, or a floating barrel device capable of floating on the water surface is connected to the suspension section;

and step seven, applying axial tension to the tension device on the joint section, applying tension to the anchoring device, and finally finishing the construction of the suspension tunnel after adjusting each tension to meet the stress requirement.

The invention relates to a construction method of a suspension tunnel, which comprises the steps of manufacturing a suspension section, a joint section and a pull stopping section of the suspension tunnel, connecting the joint section to a shoreside foundation by adopting a pulling device, connecting the pull stopping section to the shoreside foundation, connecting the suspension section to the joint section and the pull stopping section respectively after the suspension section is formed by segmented splicing to form a suspension section, forming a whole suspension tunnel pipe body, and then adjusting the axial pulling force of the two pulling devices on the pipe body to finally form the suspension tunnel; the construction method is simple to operate, can effectively reduce the stress variation quantity of the cable anchored on the sea bed or the river bed, is beneficial to the long-term use of the cable and the foundation anchored on the sea bed or the river bed, has lower construction risk and lower construction cost, effectively saves the construction cost, effectively reduces the maintenance difficulty, and is easy for engineering implementation and popularization.

Compared with the prior art, the invention has the beneficial effects that:

1. the design method of the suspension tunnel has the advantages that the method of respectively applying axial tension to one end or two ends of the tube body has the same technical effects that ① the buoy type suspension tunnel adopts a mode of enlarging a section tube body, and adopts a large section tube body to effectively increase the bending rigidity of the tube body, ② the anchor type suspension tunnel adopts a plurality of deepwater cables to improve the horizontal rigidity of the tube body, ③ the anchor type suspension tunnel improves the residual buoyancy and the requirement on the deepwater foundation uplift force, compared with the three design methods of ①②③, the method adopted by the invention is easier to realize, lower in construction risk, lower in manufacturing cost and easier to implement and popularize in engineering;

2. compared with the technical problem that the horizontal rigidity of the existing float-type suspension tunnel is weak and the technical problem that the horizontal rigidity of the existing anchor-pull type suspension tunnel is still weak and the elastic shock phenomenon is easy to occur, the shore-connection system for the suspension tunnel has the advantages that the joint section of the suspension tunnel directly penetrates through the shore foundation and then provides axial tension for the joint section by virtue of the tension device on the joint section, so that the horizontal rigidity and the vertical rigidity of the whole pipe body of the suspension tunnel can be obviously increased, the movement of the pipe body is additionally restrained, the self-vibration frequency of the pipe body of the suspension tunnel is improved, a high-energy area of a sea wave frequency spectrum can be avoided, the deflection and the acceleration of the pipe body of the suspension tunnel can be reduced, meanwhile, the design redundancy is increased, and the safety and the reliability of the suspension tunnel are improved. The suspension tunnel pipe body is changed into a high-frequency self-vibration structure system such as a string due to the increase of the axial tension, the high-frequency vibration of the pipe body can enable energy consumption to be faster through the vibration with faster frequency and the damping effect by combining with the peripheral water of the pipe body, so that when the suspension tunnel moves by the waves and water flows in all directions, the high-frequency vibration of the pipe body can enable the energy consumption to be faster;

3. according to the suspension tunnel structure, the shore connection systems are arranged at the two ends of the suspension section of the tube body, the joint section directly penetrates through a shore foundation, and then axial tension is provided for the joint section by virtue of the tension device on the joint section, so that the horizontal rigidity and the vertical rigidity of the whole tube body of the suspension tunnel can be obviously increased, an additional constraint effect is achieved on the motion of the tube body, the natural vibration frequency of the suspension tunnel tube body is improved, a high energy area of a wave frequency spectrum can be avoided, the deflection and the acceleration of the suspension tunnel tube body can be reduced, and the safety and the reliability of the suspension tunnel are improved. The suspension tunnel structure is applied to the anchor-pull type suspension tunnel, which means that the consumption of the total motion energy of the structure can be concentrated on the pipe body more, the stress variation quantity of the cable anchored on the sea bed or the river bed can be effectively reduced, the cable anchored on the sea bed or the river bed and the foundation can be used for a long time, the construction risk is lower, the construction cost is effectively saved, the maintenance difficulty is effectively reduced, and meanwhile, the engineering implementation and popularization are easy;

4. the construction method of the suspension tunnel comprises the steps of firstly connecting two joint sections on a shore foundation by using tension devices respectively, then splicing the joint sections in sections to form suspension sections, finally connecting the suspension sections with the two joint sections respectively, and then adjusting the axial tension of the two tension devices on a pipe body to form the suspension tunnel finally; the construction method is simple to operate, can effectively reduce the stress variation quantity borne by the cable anchored on the sea bed or the river bed, is beneficial to the long-term use of the cable and the foundation anchored on the sea bed or the river bed, has lower construction risk and lower construction cost, effectively saves the construction cost, effectively reduces the maintenance difficulty, and is easy to implement and popularize in engineering;

5. the invention relates to a construction method of a suspension tunnel, which comprises the steps of manufacturing a suspension section, a joint section and a pull stopping section of the suspension tunnel, connecting the joint section to a shoreside foundation by adopting a pulling device, connecting the pull stopping section to the shoreside foundation, connecting the suspension section to the joint section and the pull stopping section respectively after the suspension section is formed by segmented splicing to form a suspension section, forming a whole suspension tunnel pipe body, and then adjusting the axial pulling force of the two pulling devices on the pipe body to finally form the suspension tunnel; the construction method is simple to operate, can effectively reduce the stress variation quantity of the cable anchored on the sea bed or the river bed, is beneficial to the long-term use of the cable and the foundation anchored on the sea bed or the river bed, has lower construction risk and lower construction cost, effectively saves the construction cost, effectively reduces the maintenance difficulty, and is easy for engineering implementation and popularization.

Description of the drawings:

FIG. 1 is a schematic diagram of a method of designing a suspension tunnel;

FIG. 1a is a schematic diagram of a stiffness system of a conventional suspended tunnel structure;

FIG. 1b is a schematic diagram of a structural rigidity system of the suspension tunnel after axial tension is increased;

FIG. 1c is a diagram showing the effect of the tube body after the axial tension is added to the suspension tunnel according to the present invention;

FIG. 2 is a graph of the relationship between the natural frequency of a floating tunnel without axial tension in the prior art and the natural frequency of a floating tunnel with axial tension according to the present invention;

fig. 3 is a schematic view of a first structure of the suspension tunnel according to the present invention.

Fig. 4 is a schematic cross-sectional view of a first structure of a floating tunnel tube a-a of the floating tunnel in fig. 3.

Fig. 5 is an axial view of the first structure of the suspension tunnel of fig. 3, in which the tube body of the suspension tunnel is connected with a tension device.

Fig. 6 is a design diagram (6a-6d) of four structures of the tube wall section of the suspension tunnel tube body according to the invention.

FIG. 7 is a view showing two connection structures of the tube wall and the pulling device of the suspension tunnel tube of the present invention (7a, 7b)

Fig. 8 is a schematic diagram of a second structure of the suspension tunnel according to the present invention.

Fig. 9 is a cross-sectional view of the floating tunnel tube according to the present invention.

Fig. 10 is a cross-sectional view of the floating tunnel tube according to the present invention.

Fig. 11 is a cross-sectional view of the suspension tunnel tube of the present invention in a horseshoe shape.

The labels in the figure are:

101. the shore foundation comprises a shore foundation body 1, a pipe body 11, a suspension section 12, a joint section 13, a steel plate layer 14, a reinforced concrete layer 15, a shearing part 16, a rubber layer 17, a pavement layer 18, an inner cavity 2, a tension device 21, a mooring lug 22, a cable 23, an anchor chamber 3, a tension stopping section 31, a protruding portion 32 and a groove portion.

Detailed Description

The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.