Vibration pipe jacking machine for ultra-large section pipe jacking tunnel construction and construction method
阅读说明：本技术 一种超大断面顶管隧道施工用振动顶管机及施工方法 (Vibration pipe jacking machine for ultra-large section pipe jacking tunnel construction and construction method ) 是由 王晓睿 游鹏 周峰 杨伟 田均举 郑培信 胡建勇 肖亚冲 夏楠楠 吴岱諠 许谢芬 于 2020-04-16 设计创作，主要内容包括：一种超大断面顶管隧道施工用振动顶管机,包括顶进装置、载车,顶进装置固定设置在载车上,由载车带动顶进装置在顶管内移动；所述顶进装置设置有振动顶进油缸,其包括顶进油缸、振动头；振动头固定设置在顶进油缸的油缸柱塞端部；振动顶管机在顶进过程中,振动头产生超音频振动,超音频振动传递到顶管上,使顶管与地层之间的摩擦力减小,顶进油缸提供顶进推力,使顶管产生移动；本发明的振动顶管机,可大幅度减小顶管与地层之间的摩擦力,因此可改善现有顶管施工工艺,大幅减小顶管外壁与开挖隧道间的间隙,达到大幅降低地层损失的目的,从而改善了以往顶管隧道施工所引起地表沉降问题,使顶管隧道施工在高层建筑越来越多的城市施工更加安全。(A vibrating pipe jacking machine for ultra-large section pipe jacking tunnel construction comprises a jacking device and a vehicle loader, wherein the jacking device is fixedly arranged on the vehicle loader and is driven by the vehicle loader to move in a pipe jacking; the jacking device is provided with a vibration jacking oil cylinder which comprises a jacking oil cylinder and a vibration head; the vibrating head is fixedly arranged at the end part of an oil cylinder plunger of the jacking oil cylinder; in the jacking process of the vibrating pipe jacking machine, the vibrating head generates supersonic frequency vibration which is transmitted to the pipe jacking, so that the friction force between the pipe jacking and the stratum is reduced, and the jacking oil cylinder provides jacking thrust to move the pipe jacking; the vibrating push bench can greatly reduce the friction force between the push pipe and the stratum, thereby improving the existing push pipe construction process, greatly reducing the gap between the outer wall of the push pipe and the excavated tunnel, and achieving the purpose of greatly reducing the stratum loss, thereby improving the ground surface settlement problem caused by the previous push pipe tunnel construction, and ensuring that the push pipe tunnel construction is safer in more and more urban construction of high-rise buildings.)
1. The utility model provides a super large section push pipe tunnel construction is with vibration pipe pushing jack, characterized by: comprises a jacking device (1) and a vehicle carrier (2); the jacking device (1) comprises a vibration jacking oil cylinder assembly (1.1) and a supporting assembly (1.2), wherein the vibration jacking oil cylinder assembly (1.1) is fixedly arranged on the supporting assembly (1.2); the jacking device (1) is fixedly arranged on the vehicle carrier (2); in the working process of the vibrating push bench, the vehicle loader (2) drives the jacking device (1) to move in the push bench;
the vibration jacking oil cylinder assembly (1.1) comprises a vibration jacking oil cylinder (1.1.1) which comprises a jacking oil cylinder (1.1.1.1) and a vibration head (1.1.1.2), wherein an oil cylinder plunger (1.1.1.1.1) is movably arranged on the jacking oil cylinder (1.1.1.1), and the vibration head (1.1.1.2) is fixedly arranged at the outer end part of the oil cylinder plunger (1.1.1.1.1); the end surface of the jacking oil cylinder (1.1.1.1) far away from the side of the oil cylinder plunger (1.1.1.1.1) is provided with a shock pad; in the jacking process of the vibrating push bench, the vibrating head (1.1.1.2) generates vibration, and the oil cylinder plunger (1.1.1.1.1) of the jacking oil cylinder (1.1.1.1) drives the vibrating head (1.1.1.2) to provide jacking thrust.
2. The vibrating pipe-jacking machine for the ultra-large section pipe-jacking tunnel construction according to claim 1, which is characterized in that: the vibration head (1.1.1.2) comprises a vibration head shell (1.1.1.2.1), a vibration head tail end cover (1.1.1.2.2), a vibration head front end cover (1.1.1.2.3), a coil framework (1.1.1.2.4), a coil (1.1.1.2.5), a giant magnetostrictive body (1.1.1.2.6), a front vibration disc (1.1.1.2.7), a tail vibration disc (1.1.1.2.8), a front disc spring (1.1.1.2.9), a vibration coupling head (1.1.1.2.10), a rear disc spring (1.1.1.2.11) and a vibration head connecting transition disc (1.1.1.2.12); the vibration head shell (1.1.1.2.1) is in a short pipe shape with a flange, the end face of the flange end of the vibration head shell is provided with a counter bore, a vibration head and tail end cover (1.1.1.2.2) is fixedly arranged in the counter bore, and the end face of the vibration head and tail end cover (1.1.1.2.2) which is in contact with the vibration head shell (1.1.1.2.1) is provided with a convex circular ring; an annular groove is formed in the inner circle surface, close to the flange end, of the vibration head shell (1.1.1.2.1), the opening direction of the annular groove is parallel to the axis of the vibration head shell (1.1.1.2.1), a coil framework (1.1.1.2.4) is fixedly arranged in the annular groove, a through hole is formed in the middle of the annular groove, a winding groove is formed in the outer circle surface of the annular groove, and a coil (1.1.1.2.5) is wound in the winding groove; the other end face of the vibration head shell (1.1.1.2.1) is fixedly provided with a vibration head front end cover (1.1.1.2.3), and a through hole is formed in the middle of the vibration head front end cover; a short cylindrical giant magneto (1.1.1.2.6) is movably arranged in a through hole in the middle of the coil framework (1.1.1.2.4), a front vibration disc (1.1.1.2.7) is fixedly arranged on the end face of the side close to a front end cover (1.1.1.2.3) of the vibration head, the front vibration disc (1.1.1.2.7) is a circular plate with two end faces provided with step circles, the step circle of the contact end of the giant magneto (1.1.1.2.6) is arranged in the round hole of the coil framework (1.1.1.2.4), a gap is arranged between the corresponding step surface and the end surface of the coil skeleton (1.1.1.2.4), a front disc spring (1.1.1.2.9) is arranged between the step surface far away from the giant magnetor (1.1.1.2.6) and the front end cover (1.1.1.2.3) of the vibration head, the end surface far away from the giant magnetor (1.1.1.2.6) is fixedly provided with a vibration coupling head (1.1.1.2.10), the vibration coupling head (1.1.1.2.10) is in a circular plate shape, the outer circular surface of the vibrating head is arranged in a circular hole of the vibrating head front end cover (1.1.1.2.3), and the outer end surface of the vibrating head front end cover is higher than the outer end surface of the vibrating head front end cover (1.1.1.2.3); a tail vibration disc (1.1.1.2.8) is fixedly arranged on the end face of the other side of the giant magneto body (1.1.1.2.6), the tail vibration disc (1.1.1.2.8) is in a circular plate shape, two-stage step faces are arranged on the end face, far away from the giant magneto body (1.1.1.2.6), of the tail vibration disc, a gap is formed between the first-stage step face and the end face of the side wall of the ring groove of the vibration head shell (1.1.1.2.1), and a rear disc spring (1.1.1.2.11) is arranged between the second-stage step face and the end face of the convex circular ring of the vibration head end cover (1.1.1.2.2); the end face of the flange end of the vibration head shell (1.1.1.2.1) is fixedly connected with a vibration head connecting transition disc (1.1.1.2.12), and the vibration head (1.1.1.2) is fixedly connected to the outer end part of the oil cylinder plunger (1.1.1.1.1) through the vibration head connecting transition disc (1.1.1.2.12); the rigidity of the rear disc spring (1.1.1.2.11) is greater than that of the front disc spring (1.1.1.2.9).
3. The vibrating pipe-jacking machine for the ultra-large section pipe-jacking tunnel construction according to claim 2, which is characterized in that: the vibrating jacking cylinder assembly (1.1) further comprises a scissor type telescopic frame (1.1.2), and the scissor type telescopic frame comprises a telescopic frame base (1.1.2.1), a telescopic frame driving cylinder (1.1.2.2) and a jacking cylinder base (1.1.2.3); the telescopic frame driving oil cylinder (1.1.2.2) is fixedly arranged on the telescopic frame base (1.1.2.1), and the jacking oil cylinder base (1.1.2.3) is movably connected with the telescopic frame base (1.1.2.1) through a connecting rod and a rotating shaft; the scissor type telescopic frame (1.1.2) is fixedly connected with the vibration jacking oil cylinder (1.1.1) through a jacking oil cylinder seat (1.1.2.3); the scissor type telescopic frame (1.1.2) is fixedly connected with the supporting component (1.2) through a telescopic frame base (1.1.2.1).
4. The vibrating pipe-jacking machine for the ultra-large section pipe-jacking tunnel construction according to claim 1, which is characterized in that: the supporting component (1.2) comprises a supporting frame (1.2.1), a frame connecting plate (1.2.2) and a frame reinforcing rod (1.2.3); the supporting frame (1.2.1) is formed by fixedly connecting a plurality of channel steels; the frame reinforcing rod (1.2.3) is in a cross shape and is fixedly arranged on the inner side of the supporting frame (1.2.1); the frame connecting plate (1.2.2) is fixedly arranged on the outer side surface of the supporting frame (1.2.1).
5. The vibrating pipe-jacking machine for the ultra-large section pipe-jacking tunnel construction according to claim 1, which is characterized in that: the vehicle carrier (2) comprises a vehicle body (2.1), a walking mechanism (2.2) is arranged at the bottom of the vehicle carrier, an operating table (2.3) is arranged at the tail end of the upper part of the vehicle carrier, a hydraulic system (2.4) and a vibrating head driving power supply (2.5) are arranged at the front part of the operating table (2.3), and an external power socket is arranged on the vibrating head driving power supply (2.5); a through groove is formed in the front end of the vehicle body (2.1), the jacking device (1) is fixedly arranged at the front end of the upper portion of the vehicle body (2.1), and the group of vibration jacking oil cylinder assemblies (1.1) are arranged in the through groove.
6. The vibrating pipe-jacking machine for the ultra-large section pipe-jacking tunnel construction according to claim 5, which is characterized in that: the jacking oil cylinder (1.1.1.1) and the telescopic frame driving oil cylinder (1.1.2.2) are in power connection with the hydraulic system (2.4) through oil pipes, and the jacking oil cylinder (1.1.1.1) and the telescopic frame driving oil cylinder (1.1.2.2) are provided with independent hydraulic operating devices; the vibration head (1.1.1.2) is connected with a vibration head driving power supply (2.5) through a cable, the vibration head (1.1.1.2) is connected with an independent driving power supply, and the waveform of the output current of each driving power supply keeps phase synchronization.
7. The vibrating pipe-jacking machine for the ultra-large section pipe-jacking tunnel construction according to claim 5, which is characterized in that: the running mechanism (2.2) is a crawler type.
8. The vibrating pipe-jacking machine for the ultra-large section pipe-jacking tunnel construction according to claim 5, which is characterized in that: the running mechanism (2.2) is wheel type.
9. The vibrating pipe-jacking machine for the ultra-large section pipe-jacking tunnel construction according to claim 5, which is characterized in that: the running mechanism (2.2) is of a rail type.
10. The construction method of the vibrating pipe-jacking machine for the ultra-large section pipe-jacking tunnel construction based on the claim 1 is characterized by comprising the following steps: the method comprises three steps of jacking preparation, pre-jacking and construction jacking:
s1, preparation for advancing: the vehicle carrier (2) drives the jacking device (1) to move in the top pipe (3) and move to the tail end of the pre-jacking top pipe (3); the hydraulic system (2.4) is operated and controlled to drive the telescopic frame to drive the oil cylinder (1.1.2.2), the shear type telescopic frame (1.1.2) extends out to drive the vibration jacking oil cylinder (1.1.1) to be arranged between the tail part of the pre-jacking pipe jacking (3) and the head part of the rear pipe jacking (3); the hydraulic system (2.4) is operated and controlled, an oil cylinder plunger (1.1.1.1.1) extends out, so that the vibration jacking oil cylinder (1.1.1) is tightly jacked between the tail part of the pre-jacking pipe jacking (3) and the head part of the rear pipe jacking (3), and the jacking force is 20-40% of the maximum output thrust of the jacking oil cylinder (1.1.1.1);
s2, pre-jacking: starting a vibration head driving power supply (2.5), enabling the vibration head (1.1.1.2) to vibrate, enabling the output power of the vibration head (1.1.1.2) to vibrate to be 40% -60% of the maximum power of the vibration head, and enabling the output power to last for 30-60 seconds; the vibration is transmitted to the pre-jacking pipe (3) through the vibration coupling head (1.1.1.2.10), and the pipe (3) generates vibration propagating along the axial direction;
s32, construction jacking: gradually increasing the output thrust of the jacking oil cylinder (1.1.1.1) to 70-90% of the maximum thrust, and pushing the pre-jacking pipe jacking (3) to move forwards by the jacking oil cylinder (1.1.1.1) until the pre-jacking pipe jacking (3) moves in place.
Technical Field
The invention relates to the technical field of machines for pipe-jacking tunnel construction, in particular to a vibrating pipe-jacking machine for super-large section pipe-jacking tunnel construction.
Background
Along with the rapid development of urbanization, people increasingly attach importance to the development of urban underground engineering; the pipe-jacking method is a non-open cut technology, and is a tunnel construction method which mainly utilizes the jacking pressure between a main jack and a relay between pipe joints to jack a tool pipe into a stratum from an initial well, jack the tool pipe into a receiving well and naturally lay the pipe joints behind the tool pipe between two working wells; although the pipe jacking construction method has the advantages of small earthwork excavation amount, convenience and quickness, the influence on the stratum around the construction cannot be avoided in the construction process, so that the problem of surface subsidence is caused; especially, the construction of the ultra-large section jacking pipe has larger influence on the surrounding strata, and at the present day that urban high-rise buildings are increasing day by day, the ground surface settlement generated by the construction of the ultra-large section jacking pipe threatens the safety of the surrounding high-rise buildings, so that the construction becomes a technical problem which must be solved by the construction of the jacking pipe tunnel.
The main reasons for ground surface settlement caused by pipe-jacking tunnel construction are stratum loss in the construction process and stratum disturbance caused by shearing friction between the pipe jacking and the stratum in the jacking process; the stratum loss in the construction process is to reduce the shearing friction between the jacking pipe and the stratum in the jacking process, a gap of about 40 mm is arranged between the outer wall of the jacking pipe and the excavated tunnel, and in the construction process, the gap can be filled by synchronous grouting, but still certain stratum loss can be caused, and the loss amount is positively correlated with the size of the gap; the formation loss can be caused by the self water loss of the later grouting, and the loss amount of the formation loss is positively correlated with the size of the gap; from the above analysis, it can be seen that the most fundamental reason for the ground surface settlement caused by the pipe-jacking tunnel construction is the friction between the pipe jacking and the ground layer, and the reduction of the friction between the pipe jacking and the ground layer is the key to solve the problem of the ground surface settlement caused by the pipe-jacking tunnel construction.
Disclosure of Invention
In order to overcome the defects in the background art, the invention discloses a vibrating pipe jacking machine for the construction of an ultra-large section pipe jacking tunnel, which comprises a jacking device and a vehicle loader, wherein the jacking device is fixedly arranged on the vehicle loader and is driven by the vehicle loader to move in a pipe jacking; the jacking device is provided with a vibration jacking oil cylinder which comprises a jacking oil cylinder and a vibration head, and the vibration head is fixedly arranged at the end part of an oil cylinder plunger of the jacking oil cylinder; in the jacking process of the vibrating pipe jacking machine, the vibrating head generates supersonic frequency vibration which is transmitted to the pipe jacking, so that the friction force between the pipe jacking and the stratum is reduced, and the jacking oil cylinder provides jacking thrust to move the pipe jacking; by adopting the vibrating pipe jacking machine, the friction force between the pipe jacking and the stratum can be greatly reduced, so that the existing pipe jacking construction process can be improved, the gap between the outer wall of the pipe jacking and the excavated tunnel is greatly reduced, the aim of greatly reducing the stratum loss is fulfilled, and the problem of surface subsidence caused by pipe jacking tunnel construction is solved; in addition, the friction force between the jacking pipe and the stratum is reduced, the stratum disturbance caused by shearing friction between the jacking pipe and the stratum is correspondingly reduced, and the problem of surface subsidence caused by the construction of a jacking pipe tunnel is further improved; the vibrating push bench solves the technical problem of the existing push bench tunnel construction, and ensures that the push bench tunnel construction is safer in more and more urban constructions of high-rise buildings.
In order to realize the purpose, the invention adopts the following technical scheme: a vibrating pipe jacking machine for ultra-large section pipe jacking tunnel construction comprises a jacking device and a vehicle carrier; the jacking device comprises vibration jacking oil cylinder assemblies and supporting assemblies, wherein the vibration jacking oil cylinder assemblies are uniformly and fixedly arranged on the supporting assemblies; the jacking device is fixedly arranged on the vehicle carrier; in the working process of the vibrating push bench, the vehicle carrier drives the jacking device to move in the push bench;
the vibration jacking oil cylinder assembly comprises a vibration jacking oil cylinder, the vibration jacking oil cylinder comprises a jacking oil cylinder and a vibration head, an oil cylinder plunger is movably arranged on the jacking oil cylinder, and the vibration head is fixedly arranged at the outer end part of the oil cylinder plunger; the end face of the jacking oil cylinder, which is far away from the side of the oil cylinder plunger, is provided with a shock pad; during the jacking process of the vibrating pipe jacking machine, the vibrating head generates ultrasonic frequency vibration, and the shock absorption pad is used for damping and attenuating ultrasonic vibration generated by the vibrating head and preventing the ultrasonic vibration from being transmitted to the jacking pipe at the rear end of the jacking oil cylinder during the jacking process; and an oil cylinder plunger of the jacking oil cylinder pushes the vibrating head to provide jacking thrust.
Further, the vibration head comprises a vibration head shell, a vibration head tail end cover, a vibration head front end cover, a coil framework, a coil, a giant magnetostrictive body, a front vibration disc, a tail vibration disc, a front disc spring, a vibration coupling head, a rear disc spring and a vibration head connection transition disc; the vibration head shell is in a short pipe shape with a flange, the end face of the flange end of the vibration head shell is provided with a counter bore, vibration head and tail end covers are fixedly arranged in the counter bore, and the end face of the vibration head and tail end cover, which is in contact with the vibration head shell, is provided with a convex circular ring; an annular groove is formed in the inner circle surface of the vibration head shell, close to the flange end, the opening direction of the annular groove is parallel to the axial line of the vibration head shell, a coil framework is fixedly arranged in the annular groove, a through hole is formed in the middle of the coil framework, a winding groove is formed in the outer circle surface of the coil framework, and a coil is wound in the winding groove; the other end surface of the vibration head shell is fixedly provided with a vibration head front end cover, and a through hole is formed in the middle of the vibration head front end cover; the coil comprises a coil framework, a coil body, a vibration head, a vibration coupling head and a vibration disc, wherein a short cylindrical giant magnet is movably arranged in a through hole in the middle of the coil framework, a front vibration disc is fixedly arranged on one side end face of the coil framework, the front vibration disc is in a circular disc shape, two end faces of the front vibration disc are respectively provided with a step circle, the step circle of the contact end of the front vibration disc with the giant magnet is arranged in the circular hole of the coil framework, a gap is arranged between the corresponding step face and the end face of the coil framework, a front disc spring is arranged between the step face far away from the giant magnet and the front end cover of the vibration head, the end face far away from the giant magnet is fixedly provided with the vibration coupling head, the vibration coupling head is; a tail vibration disc is fixedly arranged on the end face of the other side of the giant magneto body, the tail vibration disc is in a circular plate shape, two stages of step faces are arranged on the end face of the tail vibration disc, which is far away from the giant magneto body, a gap is arranged between the first stage of step face and the end face of the side wall of the ring groove of the vibration head shell, and a rear disc spring is arranged between the second stage of step face and the end face of the convex circular ring of the vibration head end cover and; the end face of the flange end of the vibrating head shell is fixedly connected with a vibrating head connecting transition disc, and the vibrating head is fixedly connected to the outer end part of the oil cylinder plunger through the vibrating head connecting transition disc; the rigidity of the rear disc spring is greater than that of the front disc spring; the vibration part of the vibration head in the working process is a front vibration disc, a giant magnetostrictive body and a rear vibration disc, and the front vibration disc, the giant magnetostrictive body and the rear vibration disc are in elastic support connection with a vibration head front end cover, a vibration head tail end cover and a vibration head shell of the vibration head through two elastic elements of a front disc spring and a rear disc spring; when the vibrating head works, a sine current is passed through the coil, an alternating magnetic field is generated in the coil, the length of the giant magneto in the alternating magnetic field is changed, and the vibrating part generates axial displacement vibration as the result of different rigidity of the front disc spring and the rear disc spring; because the rigidity of the rear disc spring is greater than that of the front disc spring, the displacement of the vibration part towards the front disc spring is far greater than that towards the rear disc spring; the energy of the vibration part is transmitted out through the vibration coupling head; the outer end face of the vibration coupling head is higher than the front end cover of the vibration head in a non-working state, and the vibration coupling head retreats under the pressure of the end face of the push pipe and is flush with the front end cover of the vibration head during working, so that pre-pressure is kept between the vibration coupling head and the end face of the push pipe, the pre-pressure enables the vibration head to be always in contact with the end face of the push pipe during working, and the vibration energy of the vibration head is smoothly transmitted to the push pipe; the vibrating head is connected with the transition disc to generate slight vibration and transmit the slight vibration to the jacking oil cylinder in the working process, the end face, far away from the plunger side of the oil cylinder, of the jacking oil cylinder is provided with a shock pad, the vibration of the jacking oil cylinder is damped and attenuated, and the vibration is prevented from being transmitted to a jacking pipe at the rear end of the jacking oil cylinder in the jacking process.
Furthermore, the vibrating top-entering oil cylinder assembly further comprises a scissor type telescopic frame, and the scissor type telescopic frame comprises a telescopic frame base, a telescopic frame driving oil cylinder and a top-entering oil cylinder base; the telescopic frame driving oil cylinder is fixedly arranged on the telescopic frame base; the jacking oil cylinder base is movably connected with the telescopic frame base through a connecting rod and a rotating shaft; the shear type telescopic frame is fixedly connected with the vibration jacking oil cylinder through a jacking oil cylinder seat; the scissor type telescopic frame is fixedly connected with the supporting component through a telescopic frame base; the telescopic frame driving oil cylinder is used for driving the scissor type telescopic frame to extend outwards.
Furthermore, the supporting component comprises a supporting frame, a frame connecting plate and a frame reinforcing rod; the supporting frame is formed by fixedly connecting a plurality of channel steels; the frame reinforcing rod is in a cross shape and is fixedly arranged on the inner side of the supporting frame; the frame connecting plate is fixedly arranged on the outer side face of the supporting frame and used for connecting the supporting frames into a whole.
Further, the vehicle comprises a vehicle body, wherein a traveling mechanism is arranged at the bottom of the vehicle body, an operation table is arranged at the tail end of the upper part of the vehicle body, a hydraulic system and a vibration head driving power supply are arranged in parallel at the front part of the operation table, and the vibration head driving power supply is provided with an external power socket for taking electricity from the outside; the front end of the vehicle body is provided with a through groove, the jacking device is fixedly arranged at the front end of the upper part of the vehicle body, and the group of vibration jacking oil cylinder assemblies are arranged in the through groove.
Furthermore, the jacking oil cylinders and the telescopic frame driving oil cylinders are in power connection with a hydraulic system through oil pipes, and each jacking oil cylinder and each telescopic frame driving oil cylinder are provided with independent hydraulic operating devices for independently operating the jacking oil cylinders and the telescopic frame driving oil cylinders; the vibrating head is connected with a vibrating head driving power supply through a cable, each vibrating head is connected with an independent driving power supply, the waveform of the output current of each driving power supply keeps phase synchronization, and the vibrating head is prevented from generating interference attenuation due to the fact that the output waveform phase is asynchronous.
Further, the running mechanism is of a crawler type.
Further, the running mechanism is a wheel type.
And further. The running mechanism is of a rail type.
A construction method of a vibrating push bench for ultra-large section push bench tunnel construction comprises the following three steps of preparation before jacking, pre-jacking and construction jacking:
s1, preparation for advancing: the vehicle carrier drives the jacking device to move in the jacking pipe and move to the tail part of the pre-jacking pipe; operating and controlling a hydraulic system, driving a telescopic frame to drive an oil cylinder, extending out a shear type telescopic frame, and driving a vibration jacking oil cylinder to be arranged between the tail part of the pre-jacking pipe jacking and the head part of the rear pipe jacking; operating and controlling the hydraulic system, and extending out a plunger of the oil cylinder to enable the vibration jacking oil cylinder to be tightly jacked between the tail part of the pre-jacking pipe and the head part of the rear pipe, wherein the jacking force is 20-40% of the maximum output thrust of the jacking oil cylinder;
s2, pre-jacking: starting a vibration head driving power supply, wherein the vibration head generates ultrasonic frequency vibration, the output power of the ultrasonic frequency vibration is 40% -60% of the maximum power of the ultrasonic frequency vibration, and the time lasts for 30-60 seconds; the supersonic frequency vibration is transmitted to the pre-jacking pipe through the vibration coupling head, the pipe generates supersonic frequency vibration which is transmitted along the axis direction, so that the grouting layer wrapped on the outer wall of the pipe is converted into colloidal liquid from gel, and the friction force between the pipe and the grouting layer is reduced.
S3, construction jacking: gradually increasing the output thrust of the jacking oil cylinder to 70-90% of the maximum thrust, and pushing the pre-jacking pipe to move forwards by the jacking oil cylinder until the pre-jacking pipe moves in place.
Due to the adoption of the technical scheme, the invention has the following beneficial effects: the invention discloses a vibrating pipe jacking machine for ultra-large section pipe jacking tunnel construction, which comprises a jacking device and a vehicle loader, wherein the jacking device is fixedly arranged on the vehicle loader and is driven by the vehicle loader to move in a pipe jacking process; the jacking device is provided with a vibration jacking oil cylinder which comprises a jacking oil cylinder and a vibration head, and the vibration head is fixedly arranged at the end part of an oil cylinder plunger of the jacking oil cylinder; in the jacking process of the vibrating pipe jacking machine, the vibrating head generates supersonic frequency vibration which is transmitted to the pipe jacking, so that the friction force between the pipe jacking and the stratum is reduced, and the jacking oil cylinder provides jacking thrust to move the pipe jacking; by adopting the vibrating pipe jacking machine, the friction force between the pipe jacking and the stratum can be greatly reduced, so that the existing pipe jacking construction process can be improved, the gap between the outer wall of the pipe jacking and the excavated tunnel is greatly reduced, the aim of greatly reducing the stratum loss is fulfilled, and the problem of surface subsidence caused by pipe jacking tunnel construction is solved; in addition, the friction force between the jacking pipe and the stratum is reduced, the stratum disturbance caused by shearing friction between the jacking pipe and the stratum is correspondingly reduced, and the problem of surface subsidence caused by the construction of a jacking pipe tunnel is further improved; the vibrating push bench solves the technical problem of the existing push bench tunnel construction, and ensures that the push bench tunnel construction is safer in more and more urban constructions of high-rise buildings.
Drawings
FIG. 1 is a working state diagram of a vibrating pipe-jacking machine for ultra-large section pipe-jacking tunnel construction;
FIG. 2 is an appearance schematic diagram of a vibrating pipe-jacking machine for ultra-large section pipe-jacking tunnel construction;
FIG. 3 is an external view of the jacking device;
FIG. 4 is a schematic external view of a vibratory jacking cylinder assembly;
FIG. 5 is an external view of the vibration jacking cylinder;
FIG. 6 is an external view of the jacking cylinder;
FIG. 7 is a schematic view of the vibrating head;
FIG. 8 is a schematic cross-sectional view of a vibrating head;
FIG. 9 is a schematic external view of the vibration head housing;
FIG. 10 is a schematic view of the scissor jack;
FIG. 11 is an external view of the support assembly;
fig. 12 is an appearance schematic diagram of a vehicle.
In the figure: 1. A jacking device; 1.1, vibrating a jacking oil cylinder assembly; 1.1.1, vibrating a jacking oil cylinder; 1.1.1.1, jacking the oil cylinder; 1.1.1.1.1, cylinder plunger; 1.1.1.2, a vibrating head; 1.1.1.2.1, a vibrating head housing; 1.1.1.2.2, vibrating head and tail end covers; 1.1.1.2.3, vibrating head front end cover; 1.1.1.2.4, bobbin; 1.1.1.2.5, a coil; 1.1.1.2.6, giant magnetons; 1.1.1.2.7, front vibrating disk; 1.1.1.2.8, tail vibration disk; 1.1.1.2.9, front disc spring; 1.1.1.2.10, vibrating coupling head; 1.1.1.2.11, rear disc spring; 1.1.1.2.12, the vibration head is connected with the transition disc; 1.1.2, a scissor type telescopic frame; 1.1.2.1, a telescopic frame base; 1.1.2.2, an expansion bracket driving oil cylinder; 1.1.2.3, jacking the oil cylinder seat; 1.2, a support component; 1.2.1, a support frame; 1.2.2, connecting plates of the frame; 1.2.3, a frame reinforcing rod; 2. carrying a vehicle; 2.1, a vehicle body; 2.2, a traveling mechanism; 2.3, an operation table; 2.4, a hydraulic system; 2.5, a vibration head driving power supply; 3. jacking pipes; 4. and (6) grouting the layer.
Detailed Description
The present invention will be explained in detail by the following examples, which are disclosed for the purpose of protecting all technical improvements within the scope of the present invention.
A vibrating pipe jacking machine for ultra-large section pipe jacking tunnel construction comprises a
the vibration jacking oil cylinder assembly 1.1 comprises a vibration jacking oil cylinder 1.1.1, the vibration jacking oil cylinder 1.1.1 comprises a jacking oil cylinder 1.1.1.1 and a vibration head 1.1.1.2, an oil cylinder plunger 1.1.1.1.1 is movably arranged on the jacking oil cylinder 1.1.1.1, and the vibration head 1.1.1.2 is fixedly arranged at the outer end part of an oil cylinder plunger 1.1.1.1.1; the end surface of the jacking oil cylinder 1.1.1.1 far away from the oil cylinder plunger 1.1.1.1.1 is provided with a shock pad; in the jacking process of the vibrating push bench, the vibrating head 1.1.1.2 generates vibration, and the oil cylinder plunger 1.1.1.1.1 of the jacking oil cylinder 1.1.1.1 drives the vibrating head 1.1.1.2 to provide jacking power;
the vibration head 1.1.1.2 comprises a vibration head shell 1.1.1.2.1, a vibration head tail end cover 1.1.1.2.2, a vibration head front end cover 1.1.1.2.3, a coil framework 1.1.1.2.4, a coil 1.1.1.2.5, a giant magnetostrictive body 1.1.1.2.6, a front vibration disc 1.1.1.2.7, a tail vibration disc 1.1.1.2.8, a front disc spring 1.1.1.2.9, a vibration coupling head 1.1.1.2.10, a rear disc spring 1.1.1.2.11 and a vibration head connecting transition disc 1.1.1.2.12; the vibration head shell 1.1.1.2.1 is in a short pipe shape with a flange, the end face of the flange end is provided with a counter bore, a vibration head and tail end cover 1.1.1.2.2 is fixedly arranged in the counter bore, and the end face of the right side of the vibration head and tail end cover 1.1.1.2.2 is provided with a convex circular ring; an annular groove is formed in the inner circle surface, close to the flange end, of the vibration head shell 1.1.1.2.1, the opening direction of the annular groove is parallel to the axis of the vibration head shell 1.1.1.2.1, a coil framework 1.1.1.2.4 is fixedly arranged in the annular groove, a through hole is formed in the middle of the annular groove, a winding groove is formed in the outer circle surface of the annular groove, and a coil 1.1.1.2.5 is wound in the winding groove; the other end face of the vibration head shell 1.1.1.2.1 is fixedly provided with a vibration head front end cover 1.1.1.2.3, and a through hole is arranged in the middle of the vibration head front end cover; a short cylindrical giant magnetostrictive body 1.1.1.2.6 is movably arranged in a through hole in the middle of the coil framework 1.1.1.2.4, a front vibration disc 1.1.1.2.7 is fixedly arranged on one end face of the short cylindrical giant magnetostrictive body 1.1.1.2.6, the front vibration disc 1.1.1.2.7 is in a circular plate shape with two end faces both provided with step circles, the step circle of a contact end with the giant magnetostrictive body 1.1.1.2.6 is arranged in a circular hole of the coil framework 1.1.1.2.4, a gap is arranged between the corresponding step face and the end face of the coil framework 1.1.1.2.4, a front disc spring 1.1.1.2.9 is arranged between the step face far away from the giant magnetostrictive body 1.1.1.2.6 and a vibration head front end cover 1.1.1.2.3, a vibration coupling head 1.1.1.2.10 is fixedly arranged on the end face far away from the giant magnetostrictive body 1.1.1.2.6, the vibration coupling head 1.1.1.2.10 is in a circular plate shape, the outer circular face of the vibration head front end cover 1.1.1.2.3 is arranged in the circular hole, and the outer end face of the vibration head; a tail vibration disc 1.1.1.2.8 is fixedly arranged on the end face of the other side of the giant magneto body 1.1.1.2.6, the tail vibration disc 1.1.1.2.8 is in a circular plate shape, two-stage step faces are arranged on the end face, far away from the giant magneto body 1.1.1.2.6, of the tail vibration disc, a gap is formed between the first-stage step face and the end face of the side wall of the ring groove of the vibration head shell 1.1.1.2.1, and a rear disc spring 1.1.1.2.11 is arranged between the second-stage step face and the end face of the convex circular ring of the vibration head-tail end cover 1.1.1.2.2; the end face of the flange end of the vibration head housing 1.1.1.2.1 is fixedly connected with a vibration head connecting transition disc 1.1.1.2.12, and the vibration head 1.1.1.2 is fixedly connected to the outer end part of the oil cylinder plunger 1.1.1.1.1 through the vibration head connecting transition disc 1.1.1.2.12; the stiffness of the rear disc spring 1.1.1.2.11 is greater than the stiffness of the front disc spring 1.1.1.2.9;
the vibrating jacking cylinder assembly 1.1 further comprises a scissor type telescopic frame 1.1.2, which comprises a telescopic frame base 1.1.2.1, a telescopic frame driving cylinder 1.1.2.2 and a jacking cylinder base 1.1.2.3; the telescopic frame driving oil cylinder 1.1.2.2 is fixedly arranged on the telescopic frame base 1.1.2.1, and the jacking oil cylinder base 1.1.2.3 is movably connected with the telescopic frame base 1.1.2.1 through a connecting rod and a rotating shaft; the scissor type telescopic frame 1.1.2 is fixedly connected with the vibration jacking oil cylinder 1.1.1 through a jacking oil cylinder seat 1.1.2.3; the scissor type telescopic frame 1.1.2 is fixedly connected with the supporting component 1.2 through a telescopic frame base 1.1.2.1;
the supporting component 1.2 comprises a supporting frame 1.2.1, a frame connecting plate 1.2.2 and a frame reinforcing rod 1.2.3; the supporting frame 1.2.1 is formed by fixedly connecting a plurality of channel steels; the frame reinforcing rod 1.2.3 is in a cross shape and is fixedly arranged on the inner side of the supporting frame 1.2.1; the frame connecting plate 1.2.2 is fixedly arranged on the outer side surface of the supporting frame 1.2.1;
the vehicle carrier 2 comprises a vehicle body 2.1, a walking mechanism 2.2 is arranged at the bottom of the vehicle carrier, an operation table 2.3 is arranged at the tail end of the upper part of the vehicle carrier, a hydraulic system 2.4 and a vibration head driving power supply 2.5 are arranged in parallel at the front part of the operation table 2.3, and an external power socket is arranged on the vibration head driving power supply 2.5; a through groove is formed in the front end of the vehicle body 2.1, the
the jacking oil cylinders 1.1.1.1 and the telescopic frame driving oil cylinders 1.1.2.2 are in power connection with a hydraulic system 2.4 through oil pipes, and each jacking oil cylinder 1.1.1.1 and each telescopic frame driving oil cylinder 1.1.2.2 are provided with independent hydraulic operation devices; the vibrating heads 1.1.1.2 are connected with a vibrating head driving power supply 2.5 through cables, and each vibrating head 1.1.1.2 is connected with an independent driving power supply;
the running mechanism 2.2 is a crawler type.
A construction method of a vibrating push bench for ultra-large section push bench tunnel construction comprises the following three steps of preparation before jacking, pre-jacking and construction jacking:
s1, preparation for advancing: the vehicle carrier 2 drives the
s2, pre-jacking: starting a vibration head driving power supply 2.5, enabling the vibration head 1.1.1.2 to generate ultrasonic frequency vibration, enabling the output power of the vibration head 1.1.1.2 generating the ultrasonic frequency vibration to be 50% of the maximum power, and lasting for 60 seconds; the supersonic frequency vibration is transmitted to the
S32, construction jacking: gradually increasing the output thrust of the jacking oil cylinder 1.1.1.1 to 80% of the maximum thrust, and pushing the pre-jacking pipe jacking 3 to move forwards by the jacking oil cylinder 1.1.1.1 until the pre-jacking pipe jacking 3 moves in place.
The vibrating pipe jacking machine is adopted to carry out the construction of the ultra-large section pipe jacking tunnel, the gap between the existing tunneling tunnel and the pipe jacking can be reduced to 10 mm from 40 mm, the construction of the ultra-large section pipe jacking tunnel with the diameter of 6 m is taken as an example, the stratum loss is reduced by about 75%, the ground surface settlement is reduced by about 75% in the corresponding construction, therefore, in the urban construction, the threat of the ground surface settlement to the high-rise building around the construction is greatly reduced, and the safety of the construction of the ultra-large section pipe jacking tunnel in the urban construction is improved.
The present invention is not described in detail in the prior art.
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