阅读说明：本技术 高地应力软岩隧道钢拱架支撑结构 (High ground stress soft rock tunnel steel bow member bearing structure ) 是由 赵立财 于 2021-07-30 设计创作，主要内容包括：本公开涉及隧道工程技术领域,具体提供了一种高地应力软岩隧道钢拱架支撑结构。该高地应力软岩隧道钢拱架支撑结构包括用于支撑在隧道内壁上的多个支撑架本体,多个所述支撑架本体沿着隧道的长度方向间隔设置,多个所述支撑架本体的端部通过托架连接,所述托架上设有多个用于插入到岩石内部的钢管桩,每个所述支撑架本体上均设有用于安装锚管的安装位。本公开通过在支撑架本体的端部设置托架,可有效增加支撑架本体与支撑面的接触面积,确保承压效果,避免出现支护结构沉降的现象,且托架上穿设有钢管桩,可进一步增加支撑架本体的定位效果,施工时,可通过在安装位上穿设锚管对支撑架本体进行临时固定,便于支撑面的铺垫。(The utility model relates to a tunnel engineering technical field specifically provides a high ground stress soft rock tunnel steel bow member bearing structure. The steel arch support structure for the high ground stress soft rock tunnel comprises a plurality of support frame bodies which are used for supporting on the inner wall of the tunnel, the support frame bodies are arranged at intervals along the length direction of the tunnel, the end portions of the support frame bodies are connected through brackets, a plurality of steel pipe piles which are used for being inserted into the interior of the rock are arranged on the brackets, and each support frame body is provided with an installation position for installing an anchor pipe. This openly through set up the bracket at the tip of support frame body, can effectively increase the area of contact of support frame body and holding surface, ensure the pressure-bearing effect, avoid appearing the phenomenon that supporting construction subsides, and wear to be equipped with the steel-pipe pile on the bracket, can further increase the location effect of support frame body, during the construction, the accessible wears to establish the anchor pipe on the installation position and carries out interim fixed, the foreshadowing of the holding surface of being convenient for to the support frame body.)

1. The utility model provides a high ground stress soft rock tunnel steel bow member bearing structure, its characterized in that, including being used for supporting a plurality of support frame bodies (1) on the tunnel inner wall, it is a plurality of support frame body (1) sets up along the length direction interval in tunnel, and is a plurality of the tip of support frame body (1) passes through bracket (2) and connects, be equipped with a plurality of steel-pipe piles (4) that are used for inserting the rock inside on bracket (2), every all be equipped with the installation position that is used for installing anchor pipe (3) on support frame body (1).

2. The high ground stress soft rock tunnel steel arch support structure of claim 1, characterized in that, there is a bracket body (21) between every two adjacent support frame bodies (1), a plurality of bracket bodies (21) constitute the bracket (2), and each bracket body (21) is provided with at least one steel pipe pile (4).

3. The high ground stress soft rock tunnel steel arch support structure of claim 2, characterized in that the bracket body (21) is provided with a reinforcing layer (5) inside, and the steel pipe pile (4) is arranged on the reinforcing layer (5) in a penetrating manner.

4. The high ground stress soft rock tunnel steel arch support structure of claim 2, characterized in that, the support frame body (1) is provided with a plurality of mounting ribs (6) along the length direction of the tunnel, both ends of the mounting ribs (6) extend out of the support frame body (1), and the extending ends of the mounting ribs (6) are connected with the bracket bodies (21) corresponding to the extending ends.

5. A high ground stress soft rock tunnel steel arch support structure according to claim 1, characterized in that each support frame body (1) is provided with at least one mounting plate (7), the mounting plates (7) extend out of the support frame body (1) along both ends of the length direction of the tunnel, and the mounting positions are mounting holes (71) provided at both extending ends of the mounting plates (7).

6. A high ground stress soft rock tunnel steel arch support structure according to claim 5, characterized in that a plurality of the mounting plates (7) are provided at intervals along the circumferential direction of the support frame body (1).

7. The steel arch support structure for high ground stress soft rock tunnel according to claim 1, wherein the end of the steel pipe pile (4) inserted into the rock is provided with a plurality of penetration holes through which concrete can flow out.

8. A high ground stress soft rock tunnel steel arch support structure according to claim 1, characterized in that the end of the support frame body (1) is provided with a first support plate (13) for supporting on a support surface.

9. The high ground stress soft rock tunnel steel arch center supporting structure of claim 1, characterized in that, the two sides of the supporting frame body (1) are provided with circumferential supporting frames (13), and the two circumferential supporting frames (13) at the two sides of the supporting frame body (1) are connected through a connecting rod (15) arranged on the supporting frame body (1).

10. A high ground stress soft rock tunnel steel arch support structure according to claim 1, characterized in that the inner side of the support frame body (1) is provided with a grid arch (17), and the support frame body (1) is connected with the grid arch (17) through a plurality of trapezoidal connecting ribs (18).

Technical Field

The utility model relates to a tunnel engineering technical field especially relates to a high ground stress soft rock tunnel steel bow member bearing structure.

Background

The traffic transportation is the foundation of the prosperous device and the strong country, the traffic strong country is built, the countryside of China is wide, the terrain is numerous, and the mountain area accounts for 2/3 of the total area of the national soil, so the tunnel engineering becomes an important component of the traffic infrastructure of China and is widely applied and developed.

The complexity of interaction between the tunnel and the stratum is caused by the diversity of geological conditions and the variability of stratum parameters, and particularly when the tunnel passes through special strata such as high-ground-stress soft rock, expansive rock and the like, the worldwide engineering problem of large deformation of the tunnel is frequently encountered, and the strata are widely distributed in China and provide great challenges for the construction of tunnel engineering in China.

In order to avoid the tunnel to warp greatly and be convenient for the tunnel to warp the back and resume, need set up the support steel bow member on the inner wall in tunnel, the main muscle of tradition support steel bow member footing is long depression bar stress state, and the very easy unstability and cause supporting construction's settlement, can't play the pressure-bearing effect to cause the secondary deformation in tunnel easily.

Disclosure of Invention

In order to solve the above technical problem or at least partially solve the above technical problem, the present disclosure provides a steel arch support structure for a soft rock tunnel with high ground stress.

The utility model provides a high ground stress soft rock tunnel steel bow member bearing structure, including being used for supporting a plurality of support frame bodies on the tunnel inner wall, it is a plurality of the support frame body sets up along the length direction interval in tunnel, and is a plurality of the tip of support frame body passes through bracket connection, be equipped with a plurality of steel-pipe piles that are used for inserting the rock inside on the bracket, every all be equipped with the installation position that is used for installing the anchor pipe on the support frame body.

Optionally, a bracket body is arranged between every two adjacent support frame bodies, the bracket is composed of a plurality of bracket bodies, and at least one steel pipe pile is arranged on each bracket body.

Optionally, a reinforcing layer is arranged inside the bracket body, and the steel pipe pile penetrates through the reinforcing layer.

Optionally, many installation muscle are worn to be equipped with by the support frame body along the length direction in tunnel, the both ends of installation muscle are all stretched out the support frame body, just the end that stretches out of installation muscle and rather than corresponding this body coupling of bracket.

Optionally, every be equipped with an mounting panel on the support frame body at least, the mounting panel all stretches out along the length direction both ends in tunnel the support frame body, the installation position is for setting up two mounting holes that stretch out the end of mounting panel.

Optionally, the mounting plates are arranged at intervals along the circumferential direction of the support frame body.

Optionally, one end of the steel pipe pile inserted into the rock is provided with a plurality of penetration holes for allowing concrete to flow out.

Optionally, the end of the support frame body is provided with a first support plate for supporting on a support surface.

Optionally, the two sides of the support frame body are provided with circumferential support frames, and the two circumferential support frames at the two sides of the support frame body are connected through a connecting rod penetrating through the support frame body.

Optionally, the inner side of the support frame body is provided with a grating arch, and the support frame body is connected with the grating arch through a plurality of trapezoidal connecting ribs.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

this openly through set up the bracket at the tip of support frame body, can effectively increase the area of contact of support frame body and holding surface, ensure the pressure-bearing effect, avoid appearing the phenomenon that supporting construction subsides, and wear to be equipped with the steel-pipe pile on the bracket, can further increase the location effect of support frame body, during the construction, the accessible wears to establish the anchor pipe on the installation position and carries out interim fixed, the foreshadowing of the holding surface of being convenient for to the support frame body.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a cross-sectional view of a steel arch support structure of a high ground stress soft rock tunnel according to an embodiment of the disclosure;

FIG. 2 is a plan view of a steel arch support structure of a high ground stress soft rock tunnel according to an embodiment of the disclosure;

FIG. 3 is a schematic view of an arrangement of a bracket according to an embodiment of the disclosure;

fig. 4 is a schematic view of an arrangement manner of the circumferential support frames according to the embodiment of the present disclosure;

fig. 5 is a schematic view of an arrangement manner of a grating arch according to an embodiment of the disclosure.

Wherein, 1, a support frame body; 2. a bracket; 21. a bracket body; 3. an anchor pipe; 4. steel pipe piles; 5. a reinforcement layer; 6. installing ribs; 7. mounting a plate; 71. mounting holes; 8. a first reinforcing rib; 9. connecting ribs; 10. a hardened layer; 11. a concrete primary spraying layer; 12. a concrete facing; 13. a first support plate; 14. a circumferential support frame; 15. a connecting rod; 16. a second reinforcing rib; 17. a grille arch; 18. trapezoidal connecting ribs; 19. a second support plate; 20; and a third support plate.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

With reference to fig. 1 to 3, the steel arch support structure for the high ground stress soft rock tunnel provided in the embodiment of the present application includes a plurality of support frame bodies 1 for supporting on the inner wall of the tunnel, during installation, a concrete primary spraying layer 11 is firstly sprayed on the inner wall of the tunnel to ensure the flatness of the inner wall of the tunnel, and after the support frame bodies 1 are installed, a concrete surface layer 12 is sprayed on the inner side of the support frame bodies 1. A plurality of support frame bodies 1 set up along the length direction interval in tunnel for each support frame body 1's atress is even, ensures support frame body 1's supporting effect and life. Preferably, this disclosed support frame body 1 is the I-steel, and support frame body 1 is the steel bow member structure promptly, effectively ensures structural strength. And in order to increase the strength of the support frame body 1, a plurality of connecting ribs 9 are arranged between two adjacent support frame bodies 1, so that the support frame bodies 1 are connected into a whole and stressed together.

As shown in fig. 1 and 2, ends of a plurality of support frame bodies 1 are connected by a bracket 2, and a plurality of steel pipe piles 4 to be inserted into a rock are provided on the bracket 2. In order to ensure the support strength of the bracket 2, a plurality of first reinforcing beads 8 may be provided on the bracket 2. Specifically, bracket 2 is connected with the bottom of support frame body 1, and the bottom of support frame body 1 is for being close to bottom position department, and the holding surface is passed to the bottom of support frame body 1 to make bracket 2 and support position department contact, the inside pressure in tunnel passes through support frame body 1 and transmits to bracket 2 promptly, and the biography is to support position department, can effectively increase area of contact, ensures the supporting effect. Further optimally, the bottom end of the support frame body 1 is provided with the first support plate 13, and the first support plate 13 is in contact with the support surface, so that the hardened layer 10 can be arranged on the support surface, and sufficient support force can be provided for the support frame body 1. This openly can regard as a unit with a support frame body 1, and a plurality of support frame body 1 circumferential connection forms wholly, radially connects a plurality of whole again and forms bearing structure, consequently, can set up first backup pad 13 at the other end of support frame body 1 equally for realize fixing through corresponding first backup pad 13 between the support frame body 1 of circumferential connection, ensure the connection effect. When installed, the first support plate 13 is preferentially supported on the hardened layer 10, and refilled with a support, wherein the support may be muck or the like, and the bracket 2 is supported on the support. The bracket 2 is filled inside, so that the inside of the bracket 2 is solid, the bottom surface of the bracket 2 is a plane, and the contact area is large enough. Specifically, concrete can be poured in the bracket 2 to form a solid structure, and the design mode is stable in structure and convenient to construct.

As shown in fig. 3, in some embodiments, a bracket body 21 is disposed between every two adjacent support frame bodies 1, a plurality of bracket bodies 21 form a bracket 2, and at least one steel pipe pile 4 is disposed on each bracket body 21 to ensure the strength of each bracket body 21. Specifically, support frame body 1 wears to be equipped with many installation muscle 6 along the length direction in tunnel, and support frame body 1 is all stretched out at the both ends of installation muscle 6, and the end that stretches out of installation muscle 6 is connected rather than the bracket body 21 that corresponds. Two adjacent bracket bodies 21 are connected into a whole through the mounting ribs 6, so that the whole bracket 2 is stressed jointly, and the strength and the supporting effect of the bracket 2 are ensured.

As shown in fig. 1 to 3, the inner portion of the bracket body 21 is provided with the reinforcing layer 5, and the reinforcing layer 5 may be formed by filling concrete in the inner portion of the bracket body 21. Specifically, pouring formworks are placed around the bracket body 21, and concrete is poured into the bracket body 21 to form the reinforcing layer 5. Wherein, the concrete can flow to the holding surface of bracket 2 through the bottom of bracket body 21, and above-mentioned supporter is formed by the concrete promptly, increases driving fit effect and supporting effect, and of course, also can set up the template in the bottom of bracket body 21 for the reinforcing layer 5 structure after the shaping is even.

On steel-pipe pile 4 wears to establish on back up coat 5, specifically, back up coat 5 is before the shaping, wears to establish steel-pipe pile 4 in bracket body 21, and the junction welding of steel-pipe pile 4 and bracket body 21 for steel-pipe pile 4 is fixed a position, carries out pouring of concrete again and forms back up coat 5, and the location of steel-pipe pile 4 of being convenient for is through setting up the location effect of steel-pipe pile 4 multiplicable bracket 2. Further optimally, one end of the steel pipe pile 4 inserted into the rock is provided with a plurality of penetration holes for concrete to flow out. Specifically, in order to increase the strength of the steel pipe pile 4, concrete needs to be poured into the steel pipe pile 4, and in the pouring process, the concrete can flow out through the penetration holes, so that the gaps between the steel pipe pile 4 and the insertion holes are filled, and the positioning effect of the steel pipe pile 4 is ensured.

All be equipped with the installation position that is used for installing anchor pipe 3 on every support frame body 1, wherein, when support frame body 1 needs interim support, bracket 2 is jacked to the jack, and in order to increase the top effect that pushes away of jack, bracket 2 sets up along the horizontal direction. The anchor pipe 3 passes through the installation position and is inserted to the rock face, bears the weight of support frame body 1 and the pressure that the tunnel provided through anchor pipe 3. At this moment, there is certain clearance between the bottom of support frame body 1 and the holding surface, can lay materials such as mortar, dregs on the holding surface, ensures that the holding surface is dry, increases the support intensity, when the construction is accomplished, can demolish or cut off anchor pipe 3.

Referring to fig. 2 and 3, each support frame body 1 is provided with at least one mounting plate 7, the mounting plates 7 extend out of the support frame body 1 along the two ends of the tunnel in the length direction, the mounting positions are mounting holes 71 formed in the two extending ends of the mounting plates 7, when the support frame is used, the anchor pipes 3 penetrate through the mounting holes 71 and are inserted into the rock, and then the connecting parts of the anchor pipes 3 and the mounting plates 7 are welded to ensure the connecting effect and the supporting effect of the mounting plates 7. Further optimally, the mounting plates 7 are arranged at intervals along the circumferential direction of the support frame body 1, so that the temporary fixing effect of the support frame body 1 is ensured.

As shown in fig. 4, the both sides of this disclosure support frame body 1 all are equipped with hoop support frame 13, specifically, offer the through-hole on support frame body 1, place two hoop support frames 13 in support frame body 1's both sides, wear to establish connecting rod 15 in through-hole position department to with the position welding that connecting rod 15 and hoop support frame 13 are connected, ensure joint strength, again with two hoop support frames 13 respectively welding at two ends that stretch out of connecting rod 15, ensure firm degree. Further optimally, the annular support frames 13 on two sides of the support frame body 1 are connected through a plurality of connecting rods 15, the connecting rods 15 are uniformly distributed, and the overall connecting effect is ensured. Further optimally, in order to further increase the overall structural strength, a plurality of second reinforcing ribs 16 can be arranged on the circumferential support frame 13 and the support frame body 1 in a penetrating manner. In a similar way, the two ends of the support frame body 1 are respectively provided with the second support plate 19, the support frame body 1 is connected with the end part of the annular support frame 13 through the second support plate 19, and the two support frame bodies 1 which are connected in the circumferential direction are fixedly connected through the second support plate 19.

As shown in fig. 5, a grid arch 17 is arranged on the inner side of the support frame body 1, i.e. the side far away from the rock surface, and the support frame body 1 and the grid arch 17 are welded and fixed, so that the strength of the support frame body 1 can be increased through the grid arch 17. Further optimally, one side that grid bow member 17 and support frame body 1 are connected is equipped with a plurality of trapezoidal splice bars 18, is connected through a plurality of end to end's trapezoidal splice bar 18 between grid bow member 17 and the support frame body 1 promptly, further increases connection effect and structural strength. In a similar way, the two ends of the support frame body 1 are provided with the third support plates 20, the support frame body 1 and the grid arch 17 are connected through the third support plates 20, and the two support frame bodies 1 which are connected in the circumferential direction are fixedly connected through the third support plates 20.

This is disclosed through setting up bracket 2 at the tip of support frame body 1, can effectively increase the area of contact of support frame body 1 and holding surface, ensures the pressure-bearing effect, avoids appearing the phenomenon that supporting construction subsides, and wears to be equipped with steel-pipe pile 4 on the bracket 2, can further increase the location effect of support frame body 1, and during the construction, the accessible wears to establish anchor pipe 3 on the installation position and carries out interim fixed, the foreshadowing of the holding surface of being convenient for to support frame body 1.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.