Highway tunnel supporting structure

Abstract

The utility model discloses a highway tunnel supporting structure, and belongs to the technical field of tunnel supporting. Comprising an anchor rod assembly, the anchor rod assembly comprises an anchor rod, and a tray and a plunger are arranged at the right end of the anchor rod; the mixing layer comprises a first concrete layer, I-shaped steel and a second concrete layer are arranged on the lower portion of the first concrete layer, and a first waterproof layer is arranged on the bottommost layer of the mixing layer; the cover arch layer comprises a third concrete layer and a cover arch arranged in the third concrete layer, and a second waterproof layer is arranged on the lower portion of the cover arch. The buffer layer comprises engineering plastic and a foam concrete layer; the reinforcing layer comprises a fifth concrete layer and a steel wire mesh, and a sixth concrete layer is arranged on the lower portion of the steel wire mesh. The rock stratum is fixed through the anchor rod assembly, the mixed layer is used for rock stratum protection and waterproofing, the cover arch layer is used for reinforcement, the buffer layer reduces vibration, and the reinforcing layer is used for reinforcement. The tunnel reinforcing structure is compact and reasonable in structural design, good in reinforcing effect and capable of effectively preventing water and protecting a tunnel.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel support, and more specifically to a highway tunnel support structure. Background Art

[0002] When a tunnel passes through soft and broken surrounding rock, excavation disturbance will cause large deformation of the surrounding rock. If the initial support is not implemented in time, the surrounding rock deformation may exceed its allowable range, which may cause the face to become unstable and the tunnel to collapse, resulting in significant economic losses. At this time, tunnel advance support measures must be adopted to control the deformation of the surrounding rock, so as to ensure the safety of tunnel construction.

[0003] The patent document with publication number CN210714711U in the prior art provides a support structure for a highway tunnel with soft surrounding rocks. The structure is provided with an upper support and a lower support, a steel mesh fixed to the outer wall of the upper support and the outer wall of the lower support, an anchor rod inserted into the first concrete layer on the outer side of the steel mesh and the inner wall of the upper support, an anti-slip mechanism is provided on the outer sleeve of the anchor rod, a second concrete layer is sprayed on the inner wall of the upper support and the inner wall of the lower support, and the connecting mechanisms of the two upper supports are connected to each other to fix the tunnel.

[0004] Although the device has many beneficial effects, the following problems still exist: during long-term use, the structure is easily soaked by water seeping into the rock formation, which can easily cause the internal anti-slip structure to fail, and during the process of drilling into the rock formation, the anchor cannot stabilize the surrounding rock formation, which can easily cause the anchor to fall off. Improvements are needed. In view of this, we propose a highway tunnel support structure. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] The utility model aims to provide a highway tunnel support structure to solve the problem in the background art that water seeps into the existing structure and the internal structure will rust.

[0007] 2. Technical solution

[0008] A highway tunnel support structure includes an anchor rod assembly, the anchor rod assembly includes an anchor rod, a tray is arranged at the bottom of the anchor rod, and a plunger is arranged at the lower part of the tray;

[0009] A mixed layer, the mixed layer comprises a No. 1 concrete layer, an I-beam and a No. 2 concrete layer are sequentially arranged at the bottom of the No. 1 concrete layer, a No. 1 waterproof layer is arranged at the bottom of the mixed layer, and a plurality of anchor rod assemblies are arranged outside the mixed layer;

[0010] The arch layer includes a No. 3 concrete layer and an arch arranged inside the No. 3 concrete layer, a No. 2 waterproof layer is arranged below the arch, and the arch layer is arranged below the mixed layer;

[0011] Buffer layer, the buffer layer includes engineering plastic and No. 4 concrete layer, and the buffer layer is arranged at the lower part of the sleeve arch layer;

[0012] The reinforcement layer includes a No. 5 concrete layer and a steel wire mesh, a No. 6 concrete layer is arranged under the steel wire mesh, and the reinforcement layer is arranged under the buffer layer.

[0013] Preferably, the anchor rod is a hollow structure, and a plurality of through holes are arranged on the circumferential outer wall of the anchor rod. The plunger is fixed to the bottom of the anchor rod by threads, and a drill bit is arranged on the top of the anchor rod.

[0014] Preferably, the first concrete layer, the second concrete layer, the fifth concrete layer and the sixth concrete layer are formed by mixing cement, sand and gravel and an accelerating setting agent.

[0015] Preferably, the first waterproof layer and the second waterproof layer are EVA waterproof sheets made of ethylene-vinyl acetate copolymer.

[0016] Preferably, the third concrete layer is formed by mixing cement, sand and water, and the fourth concrete layer is formed by mixing foam and cement slurry.

[0017] Preferably, the side of the I-beam is provided with an inclination according to the curvature of the tunnel, and a through hole is provided at the center of the I-beam. The arch is staggered by multiple steel bars, and a fixed sleeve is provided at every five staggered points, and a plurality of through holes are provided on the upper part of the fixed sleeve.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] The utility model can initially stabilize the rock layer through the anchor rod assembly and the mixed layer, and a waterproof layer is arranged inside the mixed layer to waterproof the rock layer, and then the whole is supported by the cooperation of the sleeve arch, the fixed sleeve and the third concrete, and a waterproof layer is arranged inside for secondary waterproofing, and then the vibration caused by the construction is reduced by the engineering plastic and the fourth concrete layer, and finally the steel wire mesh arranged inside the reinforcement layer is used to further stabilize the tunnel. The utility model has a compact and reasonable structural design, good reinforcement effect, and can effectively waterproof and protect the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an overall schematic diagram of a highway tunnel support structure of the utility model;

[0022] Figure 2 This is a schematic diagram of an anchor rod assembly for a highway tunnel support structure according to the utility model;

[0023] Figure 3 This is a schematic diagram of a mixed layer of a highway tunnel support structure of the utility model;

[0024] Figure 4 This is a schematic diagram of an arch layer of a highway tunnel support structure of the utility model;

[0025] Figure 5 This is a schematic diagram of a buffer layer of a highway tunnel support structure of the utility model;

[0026] Figure 6 The utility model is a schematic diagram of a reinforcement layer of a highway tunnel support structure.

[0027] 100, anchor rod assembly; 101, anchor rod; 102, tray; 103, plunger; 200, mixed layer; 201, No. 1 concrete layer; 202, I-beam; 203, No. 2 concrete layer; 204, No. 1 waterproof layer; 300, arch layer; 301, No. 3 concrete layer; 302, arch; 303, No. 2 waterproof layer; 304, fixing sleeve; 400, buffer layer; 401, engineering plastic; 402, No. 4 concrete layer; 500, reinforcement layer; 501, No. 5 concrete layer; 502, wire mesh; 503, No. 6 concrete layer. DETAILED DESCRIPTION

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] See also Figure 1-6 ,The utility model provides a technical solution:

[0032] A highway tunnel support structure includes an anchor assembly 100, the anchor assembly 100 includes an anchor 101, a tray 102 is arranged at the bottom of the anchor 101, and a plunger 103 is arranged at the lower part of the tray 102; a mixed layer 200 includes a first concrete layer 201, an I-beam 202 and a second concrete layer 203 are arranged in sequence at the lower part of the first concrete layer 201, a first waterproof layer 204 is arranged at the bottom of the mixed layer 200, and a plurality of anchor assemblies 100 are arranged outside the mixed layer 200; an arch layer 300 includes a third concrete layer 201, a first waterproof layer 204 is arranged at the bottom of the mixed layer 200, and a plurality of anchor assemblies 100 are arranged outside the mixed layer 200; a second concrete layer 203 is arranged at the lower part of the first concrete layer 201, and a first waterproof layer 204 is arranged at the bottom of the mixed layer 200; a third concrete layer 203 is arranged at the lower part of the first concrete layer 201, and a first waterproof layer 204 is arranged at the bottom of the mixed layer 200, and a plurality of anchor assemblies 100 are arranged outside the mixed layer 200; a third concrete layer 203 is arranged at the lower part of the first concrete layer 201, and a first waterproof layer 204 is arranged at the bottom of the mixed layer 200, and a plurality of anchor assemblies 100 are arranged at the outer part of ... A concrete layer 301 and an arch 302 arranged inside the third concrete layer 301, a second waterproof layer 303 is arranged at the lower part of the arch 302, and the arch layer 300 is arranged at the lower part of the mixed layer 200; the buffer layer 400 includes an engineering plastic 401 and a fourth concrete layer 402, and the buffer layer 400 is arranged at the lower part of the arch layer 300; the reinforcement layer 500 includes a fifth concrete layer 501 and a wire mesh 502, a sixth concrete layer 503 is arranged at the lower part of the wire mesh 502, and the reinforcement layer 500 is arranged at the lower part of the buffer layer 400.

[0033] First, in order to ensure that the anchor rod 101 can drill into the rock formation, inject the anchoring agent and solidify the surrounding rock formation, specifically, the anchor rod 101 is a hollow structure, and the circumferential outer wall of the anchor rod 101 is provided with multiple through holes, the plunger 103 is fixed to the bottom of the anchor rod 101 by threads, and a drill bit is provided at the top of the anchor rod 101.

[0034] Next, in order to ensure that the first concrete layer 201, the second concrete layer 203, the fifth concrete layer 501 and the sixth concrete layer 503 can be attached to the wall and solidify quickly, specifically, the first concrete layer 201, the second concrete layer 203, the fifth concrete layer 501 and the sixth concrete layer 503 are all mixed with cement, sand and gravel and accelerator.

[0035] Secondly, in order to ensure that the first waterproof layer 204 and the second waterproof layer 303 can play a waterproof role, specifically, the first waterproof layer 204 and the second waterproof layer 303 are EVA waterproof boards made of ethylene-vinyl acetate copolymer.

[0036] Then, in order to ensure that the third concrete layer 301 can solidify and the fourth concrete layer 402 can function normally, specifically, the third concrete layer 301 is composed of a mixture of cement, sand and water, and the fourth concrete layer 402 is composed of a mixture of foam and cement slurry.

[0037] Finally, in order to ensure that each I-beam 202 can be smoothly fitted, connected and fixed, and the sleeve arch 302 can be fixed and injected into the third concrete layer 301, specifically, the side of the I-beam 202 is provided with an inclination according to the curvature of the tunnel, and a through hole is provided at the center position of the I-beam 202, the sleeve arch 303 is staggered by multiple steel bars, and a fixing sleeve 304 is provided at every five staggered points, and a plurality of through holes are provided on the upper part of the fixing sleeve 304.

[0038] Working principle: When the structure needs to be fixed, first drill the anchor rod 101 into the rock layer around the tunnel, inject the anchoring agent into the anchor rod 101 and install the plunger 103, first pre-lay the metal mesh and fix it, then spray the first concrete layer 201 on the metal mesh with high pressure, and after it is completely solidified, use expansion screws to connect and fix multiple I-beams 202 to the lower part of the first concrete layer 201, and after the fixing is completed, spray the second concrete layer 203 with high pressure, and after the second concrete layer 203 solidifies, lay the first waterproof layer 204, then the sleeve arch 302 is fixed to the lower part of the No. 1 waterproof layer 204 through the fixing sleeve 304 and the No. 3 concrete layer 301 is injected. After it is completely solidified, the No. 2 waterproof layer 303 is laid on the lower part of the No. 3 concrete layer 301, and then the engineering plastic 401 and the No. 4 concrete layer 402 are fixed to the lower part of the No. 2 waterproof layer 303, and finally the No. 5 concrete layer 501 is sprayed. After the No. 5 concrete layer 501 solidifies, the wire mesh 502 is installed and the No. 6 concrete layer 503 is sprayed with high pressure. After solidification, the tunnel support is completed.

[0039] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A highway tunnel support structure, characterized in that: The anchor rod assembly (100) comprises an anchor rod (101), a tray (102) is arranged at the bottom of the anchor rod (101), and a plunger (103) is arranged at the lower part of the tray (102); A mixed layer (200), the mixed layer (200) comprising a first concrete layer (201), an I-beam (202) and a second concrete layer (203) being sequentially arranged at the bottom of the first concrete layer (201), a first waterproof layer (204) being arranged at the bottom of the mixed layer (200), and a plurality of anchor rod assemblies (100) being arranged outside the mixed layer (200); The sleeve arch layer (300) comprises a third concrete layer (301) and a sleeve arch (302) arranged inside the third concrete layer (301), a second waterproof layer (303) is arranged at the lower part of the sleeve arch (302), and the sleeve arch layer (300) is arranged at the lower part of the mixed layer (200); A buffer layer (400), the buffer layer (400) comprising engineering plastic (401) and a No. 4 concrete layer (402), the buffer layer (400) being arranged at the lower part of the sleeve arch layer (300); The reinforcement layer (500) comprises a fifth concrete layer (501) and a steel mesh (502), a sixth concrete layer (503) is arranged below the steel mesh (502), and the reinforcement layer (500) is arranged below the buffer layer (400).

2. A highway tunnel support structure according to claim 1, characterized in that: The anchor rod (101) is a hollow structure, and a plurality of through holes are arranged on the circumferential outer wall of the anchor rod (101). The plunger (103) is fixed to the bottom of the anchor rod (101) by means of threads, and a drill bit is arranged on the top of the anchor rod.

3. A highway tunnel support structure according to claim 2, characterized in that: The first concrete layer (201), the second concrete layer (203), the fifth concrete layer (501) and the sixth concrete layer (503) are formed by mixing cement, sand and gravel and an accelerating setting agent.

4. A highway tunnel support structure according to claim 3, characterized in that: The first waterproof layer (204) and the second waterproof layer (303) are EVA waterproof boards made of ethylene-vinyl acetate copolymer.

5. A highway tunnel support structure according to claim 4, characterized in that: The third concrete layer (301) is formed by mixing cement, sand and water, and the fourth concrete layer (402) is formed by mixing foam and cement slurry.

6. A highway tunnel support structure according to claim 5, characterized in that: The side of the I-beam (202) is provided with an inclination according to the curvature of the tunnel, and a through hole is provided at the center of the I-beam (202). The sleeve arch (302) is staggered by a plurality of steel bars, and a fixing sleeve (304) is provided at every five staggered points, and a plurality of through holes are provided on the upper part of the fixing sleeve (304).

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