Auxiliary measure structure of tunnel longitudinal blind pipe drainage system

Abstract

The utility model discloses an auxiliary measure structure of a tunnel longitudinal blind pipe drainage system, which comprises a primary support and an inverted arch secondary lining, a longitudinal drainage blind pipe is arranged in a longitudinal construction joint formed by opposite ends of the primary support and the inverted arch secondary lining, the auxiliary measure structure further comprises a drainage structure and a wrapping structure, and the drainage structure is laid on the top of the longitudinal drainage blind pipe. The drainage structure is used for collecting seeping water seeping into the longitudinal drainage blind pipe and discharging the seeping water into the tunnel side ditch; the wrapping structure is arranged on the top of the drainage structure and laid on the surface of the primary support. The drainage structure is arranged at the top of the longitudinal drainage blind pipe and tightly attached to the longitudinal drainage blind pipe, so that the drainage structure is lighter in weight, the drainage structure is more convenient to construct and operate due to the integrated frame design attached to the shape of the longitudinal drainage blind pipe, and the drainage effect is better on the premise that water seepage and drainage are smooth. And smooth drainage is ensured.

Description

Technical Field

[0001] The utility model relates to the field of tunnel engineering, and particularly relates to an auxiliary measure structure for a longitudinal blind drain system in a tunnel. Background Technique

[0002] The construction of the tunnel waterproof and drainage system directly affects the safety of the tunnel lining structure. Therefore, the concept of the tunnel drainage system is to combine prevention, drainage and blocking, and mainly focus on drainage for comprehensive treatment.

[0003] In the existing longitudinal drainage blind pipe structure system behind the lining, non-sand concrete is laid above the longitudinal drainage blind pipe for the drainage operation of tunnel seepage water. Its disadvantage is that the construction of non-sand concrete is difficult, and the quality of non-sand concrete is large, and the longitudinal drainage blind pipe cannot bear it, easily causing the blind pipe to bend downward. In this way, the crystals in the water are easily accumulated at the bending part of the blind pipe, thus blocking the blind pipe and affecting drainage. Therefore, this scheme designs an auxiliary measure structure for the longitudinal blind drain system in the tunnel to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide an auxiliary measure structure for a longitudinal blind drain system in a tunnel to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: an auxiliary measure structure for a longitudinal blind drain system in a tunnel, including primary support and invert secondary lining. A longitudinal drainage blind pipe is arranged in a longitudinal construction joint formed at one opposite end of the primary support and the invert secondary lining. The structure further includes:

[0006] A drainage structure, which is laid on the top of the longitudinal drainage blind pipe and is used for collecting the seepage water infiltrating into the longitudinal drainage blind pipe and discharging it into the tunnel side ditch;

[0007] A wrapping structure, which is arranged on the top of the drainage structure and is laid on the surface of the primary support. The wrapping structure is used for isolating the seepage water along the surface of the primary support to the lower part of the tunnel.

[0008] Preferably, a positioning steel bar fixture is arranged at the longitudinal construction joint of the primary support and the invert secondary lining, and the positioning steel bar fixture is used for fixing the longitudinal drainage blind pipe at the longitudinal construction joint.

[0009] Preferably, the wrapping structure includes a geotextile, the geotextile is arranged on the surface of the primary support and wraps the outer wall of the longitudinal drainage blind pipe, and the drainage structure is arranged in the gap formed by the primary support, the longitudinal drainage blind pipe and the geotextile.

[0010] Preferably, the wrapping structure further includes a waterproof board, and the waterproof board is arranged on the side of the geotextile away from the primary support.

[0011] Preferably, the drainage structure includes a plastic frame, and a water permeable net is arranged inside the plastic frame.

[0012] Preferably, an arc-shaped clamping groove is arranged at the bottom of the plastic frame, and the arc-shaped clamping groove is used for clamping and sheathing the plastic frame on the top of the longitudinal drainage blind pipe.

[0013] Preferably, the water permeable net is wound and welded by plastic strips in the middle of the plastic frame, and a plurality of voids are arranged inside the water permeable net, and the plurality of voids are used for collecting and guiding water seepage.

[0014] The technical effects and advantages of the present utility model:

[0015] The drainage structure of the present utility model is arranged on the top of the longitudinal drainage blind pipe and is closely attached to the longitudinal drainage blind pipe. At the same time, in cooperation with the wrapping and laying of the wrapping structure, a complete integral drainage system is formed. The drainage structure adopts a plastic frame structure and is meshed in the middle. Such a drainage structure is different from the laying of non-sand concrete. It is lighter in weight, and the integral frame design that conforms to the shape of the longitudinal drainage blind pipe makes the construction operation of this drainage structure more convenient. In this way, on the premise of ensuring smooth water seepage and drainage, it also ensures that the structure of the longitudinal drainage blind pipe will not be damaged and the drainage is unobstructed. Description of the Drawings

[0016] Figure 1 It is a schematic structural installation diagram of the whole of the present utility model.

[0017] Figure 2 It is a schematic structural diagram of the drainage structure of the present utility model.

[0018] In the figure: 1, primary support; 2, inverted arch secondary lining; 3, longitudinal drainage blind pipe; 4, positioning steel bar fixture; 5, waterproof board; 6, geotextile; 7, drainage structure; 701, plastic frame; 702, water permeable net. Specific Embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0020] The present utility model provides as Figure 1-2An auxiliary measure structure of a longitudinal blind drain system for a tunnel is shown, including the primary support 1 and the invert secondary lining 2. A longitudinal drain blind pipe 3 is arranged in the longitudinal construction joint formed at one opposite end of the primary support 1 and the invert secondary lining 2. A positioning steel bar fixture 4 is arranged at the longitudinal construction joint of the primary support 1 and the invert secondary lining 2, and the positioning steel bar fixture 4 is used for fixing the longitudinal drain blind pipe 3 at the longitudinal construction joint.

[0021] It should be noted that the primary support 1 of the tunnel refers to a series of reinforcement measures taken in a timely manner during the tunnel excavation process to ensure the stability of the excavation surface and the surrounding soil mass. The main purpose of the primary support 1 is to prevent problems such as collapse and deformation after the tunnel excavation, and to ensure the construction safety and construction progress.

[0022] The invert secondary lining 2 of the tunnel is an important part of the tunnel structure. It is usually located above the primary support 1 structure (such as the shotcrete layer), and mainly plays the role of enhancing the stability and bearing capacity of the tunnel. The invert refers to the upper arched structure of the tunnel, and the secondary lining refers to the final structural layer completed after the primary support 1.

[0023] Through the setting of the positioning steel bar fixture 4, the longitudinal drain blind pipe 3 is positioned at the longitudinal construction joint of the primary support 1 and the invert secondary lining 2. After the longitudinal drain blind pipe 3 is set up in this way, the longitudinal drain blind pipe 3 can be used for tunnel drainage.

[0024] It also includes:

[0025] A drainage structure 7 is laid on the top of the longitudinal drain blind pipe 3. The drainage structure 7 is used to collect the seepage water that seeps into the longitudinal drain blind pipe 3 and drain it into the tunnel side ditch. The drainage structure 7 is arranged in the gap formed by the primary support 1, the longitudinal drain blind pipe 3 and the geotextile 6.

[0026] Specifically, the drainage structure 7 includes a plastic frame 701, and a seepage net 702 is arranged inside the plastic frame 701.

[0027] Furthermore, an arc-shaped card slot is arranged at the bottom of the plastic frame 701. The arc-shaped card slot is used for the plastic frame 701 to be sleeved on the top of the longitudinal drain blind pipe 3. The seepage net 702 is wound and welded in the middle of the plastic frame 701 by plastic strips, and a plurality of voids are arranged inside the seepage net 702. The plurality of voids are used for the collection and guidance of seepage water.

[0028] It should be noted that the drainage structure 7 is a geotechnical material formed by extrusion and welding of plastic through a mold. First, the exterior of the plastic is extruded and welded through a mold to form a plastic frame 701. The water-permeable net 702 inside the plastic frame 701 is arranged in a mesh structure. Such a structural composition has strong compressive strength, good pressure resistance, and excellent anti-corrosion performance. The structural setting of the water-permeable net 702 improves the water-permeable ability of the drainage structure 7, and due to its high porosity, good water-collecting property, and good water-permeability; the plastic frame 701 is arranged on the outer wall of the longitudinal drainage blind pipe 3 through an arc-shaped card slot and is closely attached to the longitudinal drainage blind pipe 3.

[0029] To maintain the strength of the structural setting, the longitudinal section of the plastic frame 701 is triangular-like. This further ensures the stability of the structure. In the triangular-like structural body, one side is an arc-shaped card slot, and the other two sides are respectively used for attaching to the surface of the primary support 1 and for wrapping and laying.

[0030] The wrapping structure is arranged on the top of the drainage structure 7 and is laid on the surface of the primary support 1. The wrapping structure is used to isolate the seepage water along the surface of the primary support 1 to below the tunnel.

[0031] Specifically, the wrapping structure includes a geotextile 6. The geotextile 6 is arranged on the surface of the primary support 1 and wraps the outer wall of the longitudinal drainage blind pipe 3.

[0032] Furthermore, the wrapping structure also includes a waterproof board 5. The waterproof board 5 is arranged on the side of the geotextile 6 away from the primary support 1.

[0033] It should be noted that the drainage structure 7 and the longitudinal drainage blind pipe 3 are laid and wrapped together with the geotextile 6 and the waterproof board 5, that is, the geotextile 6 and the waterproof board 5 are sequentially laid on the hypotenuse side of the drainage structure 7 away from the primary support 1 and the longitudinal drainage blind pipe 3. Through such a structural setting and combination, the seepage water on the surface of the primary support 1 of the tunnel is isolated by the waterproof board 5 and then seeps downward along the surface of the primary support 1. The infiltrated water is collected by the drainage structure 7 and then infiltrates into the longitudinal drainage blind pipe 3 and is then discharged into the tunnel side ditch, and then discharged outside the tunnel from the side ditch.

[0034] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An auxiliary measure structure for a longitudinal blind drain system in a tunnel, comprising a primary support (1) and an inverted arch secondary lining (2). A longitudinal drainage blind pipe (3) is arranged in a longitudinal construction joint formed at one end of the primary support (1) and the inverted arch secondary lining (2). It is characterized in that, It also includes: A drainage structure (7) laid on the top of the longitudinal drainage blind pipe (3), and the drainage structure (7) is used to collect the seepage water infiltrating into the longitudinal drainage blind pipe (3) and drain it into the tunnel side ditch; A wrapping structure arranged on the top of the drainage structure (7) and laid on the surface of the primary support (1), and the wrapping structure is used to isolate the seepage water along the surface of the primary support (1) to below the tunnel.

2. The auxiliary measure structure of a longitudinal blind pipe drainage system for tunnels according to claim 1, characterized in that A positioning steel bar fixture (4) is arranged at the longitudinal construction joint of the primary support (1) and the inverted arch secondary lining (2), and the positioning steel bar fixture (4) is used for fixing the longitudinal drainage blind pipe (3) at the longitudinal construction joint.

3. The auxiliary measure structure of a longitudinal blind pipe drainage system for tunnels according to claim 1, characterized in that, The wrapping structure includes a geotextile (6), the geotextile (6) is arranged on the surface of the primary support (1) and wraps the outer wall of the longitudinal drainage blind pipe (3), and the drainage structure (7) is arranged in the gap formed by the primary support (1), the longitudinal drainage blind pipe (3) and the geotextile (6).

4. The auxiliary measure structure of a longitudinal blind pipe drainage system for tunnels according to claim 3, characterized in that, The wrapping structure also includes a waterproof board (5), and the waterproof board (5) is arranged on the side of the geotextile (6) away from the primary support (1).

5. The auxiliary measure structure of a longitudinal blind pipe drainage system for a tunnel according to claim 3, characterized in that, The drainage structure (7) includes a plastic frame (701), and a seepage net (702) is arranged inside the plastic frame (701).

6. The auxiliary measure structure of a longitudinal blind pipe drainage system for tunnels according to claim 5, characterized in that, An arc-shaped card slot is arranged at the bottom of the plastic frame (701), and the arc-shaped card slot is used for the plastic frame (701) to be sleeved on the top of the longitudinal drainage blind pipe (3).

7. The auxiliary measure structure of a longitudinal blind pipe drainage system for tunnels according to claim 5, characterized in that, The seepage net (702) is wound and welded by plastic strips in the middle of the plastic frame (701), and a plurality of voids are arranged inside the seepage net (702), and the plurality of voids are used for collecting and guiding the seepage water.

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