Mountain tunnel vault auxiliary drainage device and tunnel

Abstract

The auxiliary drainage device comprises a plurality of drainage modules which are sequentially arranged along the cross section of the tunnel, a drainage pipe and a water inlet pipe are arranged in each drainage module, the drainage pipes are arranged in the circumferential direction of the tunnel, one end of each water inlet pipe is communicated with the corresponding drainage pipe, and the other end of each water inlet pipe is located on the surface of the corresponding drainage module. The drainage pipes of all the drainage modules are sequentially communicated, the drainage pipe at the lowest end is connected with a side ditch of the tunnel, the drainage module at the tunnel vault is provided with a water pumping device, the water inlet end of the water pumping device extends into surrounding rock, and the water outlet end of the water pumping device is connected with the drainage pipes. The device solves the problem that a tunnel is prone to being damaged due to the fact that a large amount of water leaks from the vault suddenly, accumulated water in the tunnel can be drained easily, the drainage efficiency of the tunnel is improved, normal operation and use safety of the tunnel in the later period are guaranteed, and the reliability of the tunnel is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel engineering, in particular to a mountain tunnel vault auxiliary drainage device and a tunnel. Background Art

[0002] When excavating mountain tunnels, if you encounter underground rivers and caves, it will have a certain impact on tunnel excavation. There may be groundwater in the caves. Once the groundwater suddenly flows into the tunnel project, it may cause serious consequences such as tunnel collapse and subsidence. The underground water level will change when there is an underground river, causing ground subsidence and instability of the tunnel structure. Underground rivers may bring safety hazards to construction personnel and equipment, such as ground collapse and flooding. Therefore, corresponding measures need to be taken during the excavation process to prevent water influx.

[0003] The existing method is to lay geotextile on the surface of the initial support, and then hang waterproof board on the outside of the geotextile, and then construct secondary lining on the outside of the waterproof board. The waterproof board and the geotextile are used to isolate the gushing water to prevent the water from entering the tunnel. The above method generally solves the gushing water in the form of plugging, but this method can only be applied to the situation of a small amount of water seepage in the surrounding rock. However, it is not applicable to the existence of underground rivers and caves in the tunnel vault. For underground rivers and caves with large amounts of water, the plugging method is used to cause a large amount of gushing water to gather on the top of the tunnel, resulting in deformation and collapse of the tunnel structure. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides a mountain tunnel vault auxiliary drainage device, which can effectively drain the accumulated water out of the tunnel, improve the safety during the construction process, and reduce the possibility of traffic accidents caused by accumulated water.

[0005] The utility model is realized by the following technical solutions:

[0006] An auxiliary drainage device for a tunnel vault comprises a plurality of drainage modules arranged in sequence along the cross section of the tunnel, each drainage module being provided with a drainage pipe and a water inlet pipe, the drainage pipe being arranged in the circumferential direction of the tunnel, one end of the water inlet pipe being connected to the drainage pipe, and the other end being located on the surface of the drainage module, the drainage pipes of the drainage modules being connected in sequence, the drainage pipe at the lowest end being connected to the side ditch of the tunnel, the drainage module of the tunnel vault being provided with a pumping device, the water inlet end of the pumping device extending into the surrounding rock, and the water outlet end of the pumping device being connected to the drainage pipe.

[0007] Preferably, the drainage module comprises a water baffle, and the inner wall of the water baffle is provided with grooves for embedding the drainage pipe and the water inlet pipe.

[0008] Preferably, the water inlet pipe is connected to the drain pipe through a filter.

[0009] Preferably, two ends of the drainage module are provided with a clamping structure, and two drainage modules adjacent to each other in the transverse direction are clamped to each other.

[0010] Preferably, the clamping structure includes a clamping block and a clamping slot matched therewith;

[0011] The clamping block and the clamping slot are respectively arranged at two ends of the drainage module, and the clamping block of one drainage module of two adjacent drainage modules is clamped in the clamping slot of the other drainage module.

[0012] Preferably, the pumping device comprises a main water inlet pipe, a filter and a water pump;

[0013] The water inlet end of the water pump is connected to the filter and the main water inlet pipe in sequence, the main water inlet pipe extends into the top surrounding rock, and the water outlet end of the water pump is connected to the drainage pipe.

[0014] Preferably, the drainage module is arranged between the primary support and the secondary support of the tunnel.

[0015] Preferably, the drainage template includes a vault drainage module, a spandrel drainage module and a side wall drainage module;

[0016] The arch drainage module is arranged at the arch of the tunnel, two spandrel drainage modules are symmetrically arranged at both sides of the arch drainage module along the longitudinal center of the tunnel, and the side wall drainage module is arranged at the lower end of the spandrel drainage module.

[0017] Preferably, the water inlet pipes of the spandrel drainage module and the side wall drainage module are arranged obliquely upward.

[0018] A tunnel, characterized in that a plurality of tunnel vault auxiliary drainage devices are arranged at intervals along the longitudinal direction in the tunnel.

[0019] Compared with the prior art, the utility model has the following beneficial technical effects:

[0020] The utility model provides a tunnel vault auxiliary drainage device, in which multiple drainage modules are arranged along the lateral surface of the tunnel, the drainage pipes buried in each drainage module are connected in sequence, and a pumping device is arranged on the vault, which solves the problem of difficulty in draining a large amount of water from the vault. At the same time, it also solves the problem that the tunnel is easily damaged due to excessive water pressure around the lining caused by a sudden large amount of water leakage from the vault. It is conducive to draining the accumulated water in the tunnel, increasing the drainage efficiency of the tunnel, ensuring the normal operation and safety of the tunnel in the later stage, and improving the reliability of the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the tunnel vault auxiliary drainage system and the overall layout diagram of the tunnel of the utility model;

[0022] Figure 2This is a structural schematic diagram of the vault drainage module of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the spandrel drainage module of the utility model;

[0024] Figure 4 This is a structural schematic diagram of the side wall drainage module of the utility model;

[0025] Figure 5 This is a schematic diagram of the pumping device of the utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the ferrule of the utility model.

[0027] In the figure: vault drainage module 1, spandrel drainage module 2, side wall drainage module 3, side ditch 4, hose 5, downpipe 6, supporting steel frame 7, slot 8, block 9, pumping device 11, baffle 12, drainage pipe 13, secondary water inlet pipe 16, main water inlet pipe 111, filter 112, water pump 113, connecting pipe 114, pressurized cabin 115, two-way ferrule 116, outlet pipe 34, elbow 35. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings, which are intended to explain the present invention rather than to limit it.

[0029] A tunnel vault auxiliary drainage device comprises a plurality of drainage modules arranged between primary support and secondary support, wherein the plurality of drainage modules are sequentially arranged along the cross section of the tunnel, wherein a drainage pipe 13 and a water inlet pipe are provided in each drainage module, wherein the drainage pipe is arranged circumferentially along the tunnel, wherein one end of the water inlet pipe is connected to the drainage pipe, and the other end is located on the surface of the drainage module, wherein the drainage pipes of the drainage modules are sequentially connected, and the drainage pipe at the lowest end is connected to the side ditch 4 of the tunnel, and the drainage module of the tunnel vault is provided with a pumping device 11, wherein the water inlet end of the pumping device 11 extends through the primary support into the surrounding rock, and the water outlet end of the pumping device 11 is connected to the drainage pipe.

[0030] The drainage module includes a water-blocking plate 12 and a filter 112. The inner wall of the water-blocking plate 12 is provided with grooves for embedding a drainage pipe, a water inlet pipe and a filter 112. One end of the water inlet pipe is connected to the filter 112, and the other end extends to the surface of the water-blocking plate. The water inlet pipe is inclined downward, and the water outlet end of the filter is connected to the middle of the drainage pipe.

[0031] The water-blocking plate 12 is a hard polyurethane plate, which has excellent waterproof and mechanical properties.

[0032] Both ends of the drainage module are provided with a clamping structure, and two laterally adjacent drainage modules are clamped with each other. The two adjacent drainage modules are fixed by clamping, which can effectively improve the construction efficiency of the entire drainage device and ensure the structural stability of the entire drainage device.

[0033] The snap-fit ​​structure includes a snap-fit ​​block 9 and a snap-fitting slot 8. The snap-fit ​​block 9 and the snap-fitting slot 8 are respectively arranged on both sides of the baffle plate 12. For two adjacent drainage modules, the snap-fit ​​block 9 of one baffle plate 12 is snap-fitted into the snap-fitting slot 8 of the other baffle plate 12.

[0034] The pumping device includes a main water inlet pipe 111, a filter 112, a water pump 113, a connecting pipe 114 and a pressure chamber 115. The water pump 113 is embedded in the baffle. The water inlet end of the water pump 113 is connected to the filter 112 and the main water inlet pipe 111 in sequence. The main water inlet pipe 111 passes through the initial support and extends into the top surrounding rock. The water outlet end of the water pump 113 is connected to the pressure chamber 115 through the connecting pipe 114, and the water flow is accelerated through the pressure chamber. The lower end of the pressure chamber 115 is connected to the drain pipe.

[0035] Example 1

[0036] A tunnel vault auxiliary drainage device comprises a vault drainage module 1, a spandrel drainage module 2 and a side wall drainage module 3 which are arranged on a tunnel secondary support steel frame 7. The vault drainage module 1 is arranged on the vault of the tunnel, two spandrel drainage modules 2 are symmetrically arranged on both sides of the vault drainage module 1 along the longitudinal center of the tunnel, and two side wall drainage modules 3 are symmetrically arranged on both sides of the vault drainage module 1 along the longitudinal center of the tunnel and are located at the lower end of the spandrel drainage module 2.

[0037] A pumping device is provided in the arch drainage module 1, and the main water inlet pipe 111 on the pumping device passes through the baffle and extends into the top surrounding rock. Two outlet pipes are provided at the lower end of the pressure chamber, and the drainage pipes of the arch shoulder drainage modules 2 on both sides are separated and connected, so that the incoming water is divided into two paths for drainage along both sides of the tunnel. The pressure drainage chamber is a high-efficiency drainage pump, which pumps water, and then the accumulated water can be quickly output to the side ditch through the drainage pipe through the pressure drainage chamber.

[0038] The upper end of the drainage pipe of the spandrel drainage module 2 is connected to the lower end of the drainage pipe of the arch top drainage module 1 through a two-way sleeve 116, the lower end of the drainage pipe of the spandrel drainage module 2 is connected to the upper end of the drainage pipe of the side wall drainage module 3, the lower end of the drainage pipe of the side wall drainage module 3 is connected to the downpipe 6 through a hose 5, and the end of the downpipe is connected to the side ditch through an elbow 35.

[0039] The water inlet pipes of the spandrel drainage module 2 and the side wall drainage module 3 are secondary water inlet pipes 16 , the water inlet end of the secondary water inlet pipe 16 is inclined upward, and the water outlet pipe of the secondary water inlet pipe 16 is connected to the drainage pipe through a filter.

[0040] The secondary water inlet pipes 16 may be provided in plurality, and the plurality of secondary water inlet pipes 16 are arranged at intervals along the longitudinal direction of the tunnel to collect seepage water.

[0041] The construction method of the tunnel vault auxiliary drainage device includes the following steps:

[0042] Step 1: Perform initial support on the excavated tunnel and lay a waterproof layer on the surface of the initial support. The waterproof layer includes a waterproof board and a geotextile. The geotextile is tightly attached to the surface of the initial support. Then, the waterproof board is installed on the surface of the geotextile. The second-phase support steel frame 7 is installed on the inner side of the waterproof layer, and space for the installation of a drainage device is reserved between the waterproof layer and the support steel frame 7.

[0043] Step 2: Install each drainage module on the supporting steel frame 7. The drainage modules are mutually clamped, and the drainage pipes of the side wall drainage modules are connected with the side ditch.

[0044] First, the vault drainage module 1 is installed, and then two spandrel drainage modules 2 are installed on both sides thereof, and the side wall drainage modules 3 are installed at the lower parts of the spandrel drainage modules 2 respectively.

[0045] When there is a large amount of sudden water above the arch, most of the water will be pumped into the drainage device through the pumping device and flow into the side ditch 4, and then discharged from the tunnel. The remaining small part of the water may be dispersed to the left and right sides of the tunnel due to the impact of the water flow. The dispersed water will flow into the drainage pipe through the water inlet of the arch shoulder drainage module 2 and the side wall drainage module 3, and finally flow into the side ditch 4, and finally discharged from the tunnel.

[0046] Example 2

[0047] A tunnel, in which a plurality of the above-mentioned auxiliary drainage devices are arranged at intervals along the longitudinal direction, and the spacing between two adjacent auxiliary drainage devices is determined according to the actual situation of the tunnel, for example, the same as the spacing of transverse drainage pipes.

[0048] Embodiment 3,

[0049] A tunnel, wherein the water-rich area of ​​the tunnel is provided with the auxiliary drainage device described in Example 1, and a plurality of auxiliary drainage devices are arranged at intervals along the longitudinal direction of the tunnel.

[0050] The water-rich area is an underground river or an area corresponding to a cave.

[0051] The tunnel vault auxiliary drainage device provided in the present application provides an effective solution to the tunnel drainage problem. A pumping device is built into the vault drainage module 1, and in particular, a high-efficiency drainage pump is used as a pressurized drainage chamber. This design can ensure that when water accumulation occurs, the water pump can be quickly started and the accumulated water can be extracted, and then the water can be quickly discharged from the tunnel through the pressurized drainage chamber, effectively reducing the impact of water accumulation on the tunnel structure and driving safety.

[0052] Secondly, the two shoulder drainage modules 2 and the two side wall drainage modules 3 are symmetrically arranged on both sides of the arch drainage module 1 along the longitudinal center of the tunnel. This layout is not only beautiful, but also can ensure that the drainage volume on both sides of the drainage system is balanced when working, avoiding the problem of water accumulation caused by poor drainage on one side.

[0053] In addition, the entire drainage device is installed on the tunnel secondary support steel frame 7, which means that the drainage device is closely integrated with the tunnel structure, which is not only structurally stable, but also relatively convenient to install and maintain. In addition, since the drainage module is modularly designed, it can be flexibly configured and adjusted according to the actual situation of the tunnel.

[0054] Then, the main water inlet pipe 111 in the vault drainage module 1 passes through the baffle and extends into the top surrounding rock. This design effectively prevents water outside the tunnel from penetrating into the tunnel through the surrounding rock, further enhancing the effect of the drainage system.

[0055] Finally, by timely and effectively draining the accumulated water in the tunnel, the drainage device can significantly reduce the humidity in the tunnel and reduce the erosion of water on the tunnel structure and facilities, thereby extending the service life of the tunnel.

[0056] In summary, the tunnel vault auxiliary drainage device provides a reliable solution for tunnel drainage with remarkable technical effects through its characteristics of efficient drainage, symmetrical distribution, stable structure, baffle design and extended tunnel service life.

[0057] The above content is only for explaining the technical idea of ​​the utility model and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the claims of the utility model.

Claims

1. A mountain tunnel vault auxiliary drainage device, characterized in that: It includes a plurality of drainage modules arranged in sequence along the cross-section of the tunnel, each drainage module is provided with a drainage pipe and a water inlet pipe, the drainage pipe is arranged in the circumferential direction of the tunnel, one end of the water inlet pipe is connected with the drainage pipe, and the other end is located on the surface of the drainage module, the drainage pipes of each drainage module are connected in sequence, the drainage pipe at the lowest end is connected with the side ditch of the tunnel, the drainage module of the tunnel arch is provided with a pumping device, the water inlet end of the pumping device extends into the surrounding rock, and the water outlet end of the pumping device is connected with the drainage pipe.

2. The mountain tunnel vault auxiliary drainage device according to claim 1, characterized in that: The drainage module comprises a water-blocking plate, and grooves for embedding a drainage pipe and a water inlet pipe are arranged on the inner wall of the water-blocking plate.

3. The mountain tunnel vault auxiliary drainage device according to claim 1, characterized in that: The water inlet pipe is connected with the drain pipe through a filter.

4. The mountain tunnel vault auxiliary drainage device according to claim 1, characterized in that: The two ends of the drainage module are provided with a clamping structure, and two drainage modules adjacent to each other in the transverse direction are clamped to each other.

5. The mountain tunnel vault auxiliary drainage device according to claim 4, characterized in that: The clamping structure includes a clamping block and a clamping slot matched therewith; The clamping block and the clamping slot are respectively arranged at two ends of the drainage module, and the clamping block of one drainage module of two adjacent drainage modules is clamped in the clamping slot of the other drainage module.

6. The mountain tunnel vault auxiliary drainage device according to claim 1, characterized in that: The pumping device comprises a main water inlet pipe, a filter and a water pump; The water inlet end of the water pump is connected to the filter and the main water inlet pipe in sequence, the main water inlet pipe extends into the top surrounding rock, and the water outlet end of the water pump is connected to the drainage pipe.

7. A mountain tunnel vault auxiliary drainage device according to any one of claims 1 to 6, characterized in that: The drainage module is arranged between the primary support and the secondary support of the tunnel.

8. The mountain tunnel vault auxiliary drainage device according to claim 7, characterized in that: The drainage module includes a vault drainage module, a spandrel drainage module and a side wall drainage module; The arch drainage module is arranged at the arch of the tunnel, two spandrel drainage modules are symmetrically arranged at both sides of the arch drainage module along the longitudinal center of the tunnel, and the side wall drainage module is arranged at the lower end of the spandrel drainage module.

9. The mountain tunnel vault auxiliary drainage device according to claim 8, characterized in that: The water inlet pipes of the spandrel drainage module and the side wall drainage module are arranged obliquely upward.

10. A tunnel, characterized in that: The tunnel is provided with a plurality of mountain tunnel vault auxiliary drainage devices as described in any one of claims 1 to 9 at longitudinal intervals.

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