CN221256869U - Tunnel drainage device beneficial to rapid drainage of surrounding rock water of tunnel - Google Patents

Abstract

The utility model discloses a tunnel drainage device beneficial to rapid drainage of surrounding rock water of a tunnel, which comprises an initial support, a drainage-preventing layer and a secondary lining which are sequentially arranged in the surrounding rock, wherein the drainage-preventing layer is sequentially provided with a circular drainage pipe, geotextile and a waterproof board from outside to inside, the circular drainage pipe comprises arc pipes which are symmetrically arranged and blocked at the upper end, a plurality of turbulence assemblies are arranged in each arc pipe at intervals along the water flow direction of each arc pipe, each turbulence assembly comprises a diversion strip and two flow gathering strips which are sequentially arranged, a plurality of water diversion pipes with blocked ends are arranged on each arc pipe at intervals, water diversion holes are drilled in the surrounding rock, the ends of the water diversion pipes extend into the water diversion holes after penetrating through the initial support, a plurality of water inlet holes are processed on the water diversion pipes in the water diversion holes, and the outer wall of each water diversion pipe is wrapped with non-woven fabrics. The utility model has the advantages of difficult blockage, smooth water drainage and high water drainage efficiency, and can meet the use requirement.

Description

Tunnel drainage device beneficial to rapid drainage of surrounding rock water of tunnel

Technical Field

The utility model relates to the technical field of tunnel surrounding rock water discharge, in particular to a tunnel drainage device which is beneficial to rapid discharge of tunnel surrounding rock water.

Background

Along with the rapid development of the traffic industry in China, the area range for constructing tunnels is wider and wider, the environment of the tunnel crossing area is worse, the geological conditions are more and more complex and variable, the tunnel is constructed in clay, fault, karst and other weak strata, and the surrounding rock water systems in the weak strata are developed, so that the problem of tunnel lining water seepage is often caused, the operation of the tunnels is seriously influenced, and measures are needed to be taken to guide and drain the surrounding rock water in time.

At present, a drain pipe is paved between the primary support and the secondary lining, and a drain ditch is arranged at the bottom of a tunnel and used for discharging water seepage after the secondary lining and a waterproof board so as to eliminate water pressure and prevent water pressure accumulation or lining cracking water seepage, thereby affecting the stability of the support structure and the safe operation of the tunnel. However, during tunnel operation, the drainage pipe is often blocked due to physical deposition or chemical deposition, wherein the physical deposition is mainly that small particles such as broken stone and sediment formed by scouring surrounding rocks in the process of groundwater seepage, the small particles of the surrounding rocks enter the drainage pipe along with groundwater in the process of groundwater seepage, the drainage pipe is blocked or blocked due to deposition in the drainage pipe, and the chemical deposition is that the groundwater forms a plurality of crystals containing magnesium and calcium ions under the conditions of a certain temperature, carbon dioxide and the like, and then the crystals gradually form magnesium and calcium, and the crystals are deposited in the drainage pipe to block; secondly, when rainwater weather or surrounding rock water system are developed, the problem that the groundwater drainage speed is low exists, a large amount of groundwater is accumulated in the surrounding rock of the tunnel, and certain potential safety hazards exist for normal operation of the tunnel. Therefore, the development of the tunnel drainage device which is difficult to block, smooth in drainage and high in drainage efficiency and is favorable for rapidly draining the surrounding rock water of the tunnel is objectively needed.

Disclosure of utility model

The utility model aims to provide a tunnel drainage device which is not easy to block, smooth in drainage and high in drainage efficiency and is beneficial to rapid drainage of surrounding rock water of a tunnel.

The utility model aims at realizing the method, the method comprises the steps of sequentially arranging an initial support, a drainage-preventing layer and a secondary lining in surrounding rock, sequentially arranging a circumferential drain pipe, geotextile and a waterproof board from outside to inside, wherein the circumferential drain pipe comprises arc pipes which are symmetrically arranged and blocked at the upper ends, the cross section of each arc pipe is rectangular, a plurality of turbulence assemblies are arranged in each arc pipe at intervals along the water flow direction of each arc pipe, each turbulence assembly comprises a flow dividing strip and two flow gathering strips which are sequentially arranged, each flow dividing strip is positioned in the middle of each arc pipe, each flow gathering strip is symmetrically arranged at the top and the bottom of each arc pipe, a plurality of water diversion pipes with blocked ends are arranged at intervals on each arc pipe, water diversion holes are drilled in the surrounding rock, the ends of the water diversion pipes extend into the water diversion holes after penetrating through the initial support, a plurality of water inlet holes are processed on the water diversion pipes, and non-woven fabrics are wrapped on the outer walls of the water diversion pipes.

Further, the cross sections of the flow dividing strips and the flow gathering strips are triangular, the sharp corners of the flow dividing strips are opposite to the water flow in the direction, and the sharp corners of the two flow gathering strips are opposite to each other.

Further, a plurality of annular plates are arranged on the water diversion pipe at intervals, and the outer edges of the annular plates are propped against the wall of the water diversion hole.

Further, a filter screen is arranged on the inner wall of the water diversion hole.

Further, the top of the arc tube is provided with an infusion cavity in a sealing way, and a liquid outlet hole communicated with the infusion cavity is formed in the tube wall of the arc tube.

Further, the length of the water diversion hole is 2-6 meters.

The beneficial effects of the utility model are as follows: the utility model arranges the water diversion hole in the surrounding rock, arranges the water diversion pipe in the water diversion hole, the underground water in the surrounding rock can be gathered in the water diversion hole in a natural seepage way, and then the sediment is filtered by the non-woven fabrics, and flows into the water diversion pipe through the water inlet hole, flows into the corresponding arc-shaped pipe along the water diversion pipe, and is discharged out of the tunnel through the transverse drain pipe, the longitudinal drain pipe and the drain ditch. By the method, the underground water in the surrounding rock can be effectively discharged, the problems of water leakage of the primary support of the tunnel during construction and water accumulation and cracking of the secondary lining during operation are fundamentally solved, the drainage capacity of the tunnel is improved, the drainage speed of the surrounding rock water of the tunnel is accelerated, and the drainage efficiency of the surrounding rock water is improved. Secondly, when surrounding rock water flows into the annular drain pipe from the water diversion pipe, the surrounding rock water flows through a plurality of turbulence assemblies in the arc-shaped pipe of the annular drain pipe, when the surrounding rock water flows through the turbulence assemblies, the water flows firstly collide with the flow distribution strips, the water flows are divided into two flows by the flow distribution strips, the two flows respectively flow upwards and downwards in an inclined mode, wherein the water flows flowing downwards in an inclined mode can flow towards the bottom of the arc-shaped pipe, sediments such as broken stones, sediment and crystals which are gradually deposited are flushed, the sediments are mixed into the water flow, then the two flows are converged to generate turbulence, mixing of the sediments is promoted, the water flows continue to flow through a gap between the two flow gathering strips, after the water flows flow flows through the gap, the flowing space of the water flows is enlarged, various sediments can be evenly dispersed, and the like, so on, the water flows continuously flow through the turbulence assemblies and are continuously stirred, sediment of sediments such as broken stones, sediment and crystals are avoided, the problem of blocking of the arc-shaped pipe is effectively prevented, smooth draining is ensured, and the draining efficiency is improved. In conclusion, the utility model has the advantages of difficult blockage, smooth water drainage and high water drainage efficiency, and can meet the use requirement.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of the structure of the arced tube 7 and the penstock 10 of the present utility model;

In the figure: 1-surrounding rock, 2-primary support, 3-secondary lining, 4-annular drain pipe, 5-geotextile, 6-waterproof board, 7-arc pipe, 8-shunt strip, 9-flow gathering strip, 10-water conduit, 11-water diversion hole, 12-non-woven fabric, 13-annular board, 14-filter screen and 15-transfusion cavity.

Description of the embodiments

The utility model is further described below with reference to the accompanying drawings, without limiting the utility model in any way, and any alterations or modifications based on the utility model are within the scope of the utility model.

As shown in fig. 1-2, the utility model comprises an initial support 2, a water drainage prevention layer and a secondary lining 3 which are sequentially arranged in a surrounding rock 1, wherein the initial support 2, the water drainage prevention layer and the secondary lining 3 are all of the prior structure, the water drainage prevention layer is sequentially provided with a circular drain pipe 4, geotextile 5 and a waterproof board 6 from outside to inside, the geotextile 5 and the waterproof board 6 are of the prior art, the circular drain pipe 4 comprises arc pipes 7 which are symmetrically arranged and are blocked at the upper ends, the section shape of each arc pipe 7 is rectangular, compared with the prior circular pipe, the arc pipes can be better attached to the surrounding rock 1 and the geotextile 5, the contact area between each arc pipe 7 and the surrounding rock 1 and the geotextile 5 is increased, the gaps between each arc pipe 7 and the surrounding rock 1 and the geotextile 5 are reduced to the greatest extent, the holes after concrete pouring are reduced, the thickness of the secondary lining 3 meets the requirements, each arc-shaped pipe 7 is internally provided with a plurality of turbulence assemblies at intervals along the water flow direction of the arc-shaped pipe 7, each turbulence assembly comprises a diversion strip 8 and two flow gathering strips 9 which are sequentially arranged, each diversion strip 8 is located in the middle of the arc-shaped pipe 7, the two flow gathering strips 9 are symmetrically arranged at the top and the bottom of the arc-shaped pipe 7, a plurality of water guide pipes 10 with end plugging are arranged on the arc-shaped pipe 7 at intervals, water guide holes 11 are arranged in the surrounding rock 1, the positions of the water guide holes 11 and the water guide pipes 10 correspond to each other and are mutually matched, the number, the positions and the inclination angles of the water guide holes 11 can be determined according to specific conditions such as cracks and water seepage seams of the surrounding rock 1, the end parts of the water guide pipes 10 penetrate through the primary support 2 and then stretch into the water guide holes 11, a plurality of water inlets are processed on the water guide pipes 10 in the water guide holes 11, non-woven fabrics 12 are wrapped on the outer walls of the water guide pipes 10, and the non-woven fabrics 12 play a role in groundwater filtering, and the blocking is prevented.

According to the invention, the water diversion holes 11 are formed in the surrounding rock 1, the water diversion pipe 10 is arranged in the water diversion holes 11, underground water in the surrounding rock 1 is firstly collected into the water diversion holes 11 in a natural seepage manner, sediment is filtered through the non-woven fabric 12, flows into the water diversion pipe 10 through the water inlet holes, flows into the corresponding arc-shaped pipes 7 along the water diversion pipe 10, and is discharged out of the tunnel through the transverse drain pipe, the longitudinal drain pipe and the drain ditch. Through the mode, the underground water in the surrounding rock 1 can be effectively discharged, the problems of water leakage of the primary support 2 during construction of the tunnel and water accumulation and cracking of the secondary lining 3 during operation are fundamentally solved, the drainage capacity of the tunnel is improved, the drainage speed of the surrounding rock water of the tunnel is accelerated, and the drainage efficiency of the surrounding rock water is improved. Secondly, when surrounding rock water flows into the annular drain pipe from the water conduit 10, the surrounding rock water flows through a plurality of turbulence assemblies in the arc-shaped pipe 7 of the annular drain pipe, when the surrounding rock water flows through the turbulence assemblies, the water flows firstly collide with the flow dividing strip 8, the water flows are divided into two parts by the flow dividing strip 8, the two parts of water flows respectively flow upwards and downwards in an inclined mode, wherein the water flows obliquely flowing downwards can wash the bottom of the arc-shaped pipe 7, sediments such as broken stone, sediment and crystals which gradually sink and deposit are washed away, so that the sediments are mixed into the water flows, then the two parts of water flow are converged to generate turbulence, the mixing of the sediments is promoted, the water flows continue to flow through a gap between the two flow gathering strips 9, after the water flows flow through the gap, the circulation space of the water flows becomes larger, various sediments can be evenly dispersed, so that the water flows are continuously stirred through the turbulence assemblies, the sedimentation of sediments such as broken stone, sediment and crystallization is avoided, the problem that the arc-shaped pipe 7 is blocked is effectively prevented, the drainage efficiency is improved.

Preferably, the cross sections of the flow dividing strips 8 and the flow collecting strips 9 are triangular, the sharp corners of the flow dividing strips 8 face the direction opposite to the water flow direction, and the sharp corners of the two flow collecting strips 9 are arranged in opposite directions. The triangle-shaped's reposition of redundant personnel strip 8 and gather the stream strip 9 are carrying out reposition of redundant personnel and gathering the in-process of flowing to rivers, and rivers flow along triangle-shaped's hypotenuse, and less to the resistance of rivers, triangle-shaped's hypotenuse plays the water conservancy diversion effect to the rivers, and wherein reposition of redundant personnel strip 8 can comparatively smooth guide rivers reposition of redundant personnel, and one rivers slope flows up, and another rivers slope flows down, and then washes away the deposit.

A plurality of annular plates 13 are arranged on the water diversion pipe 10 at intervals, and the outer edges of the annular plates 13 are propped against the wall of the water diversion hole 11. The ring plate 13 has two functions: firstly, the wall of the water diversion hole 11 is supported to a certain extent, so that the collapse of the wall of the water diversion hole 11 is prevented, sediment is prevented from filling the water diversion hole 11, and the drainage effect of underground water is reduced; secondly, under the condition that the annular plate 13 is not arranged, the oozed groundwater can flow downwards under the action of gravity, and can only be collected at the lower part of the water diversion hole 11, and can only enter the water diversion pipe 10 through the water inlet hole positioned at the lower part, after the annular plate 13 is arranged, the annular plate divides the water diversion hole 11 into a plurality of independent annular chambers along the length direction of the annular chamber, the groundwater oozed from the surrounding rock 1 can naturally flow into each annular chamber, then enters the water diversion pipe 10 from the water inlet hole in each annular chamber at the same time, and the groundwater can more quickly flow into the water diversion pipe 10 to be discharged, so that the drainage efficiency and the drainage capacity are improved.

The inner wall of the water diversion hole 11 is provided with a filter screen 14, and in the actual use process, the filter screen 14 has two functions: firstly, filtering the groundwater oozing from the surrounding rock 1, removing impurities such as broken stone, sediment and the like in the filtered groundwater, and preventing a subsequent drainage pipeline from being blocked; and secondly, the wall of the diversion hole 11 is supported to a certain extent, so that the collapse of the wall of the diversion hole 11 is prevented, and sediment is prevented from filling the diversion hole 11 to reduce the drainage effect of underground water.

The top of the arc tube 7 is provided with an infusion cavity 15 in a sealing way, and the tube wall of the arc tube 7 is provided with a liquid outlet communicated with the infusion cavity 15. In the utility model, although the turbulence assembly is arranged to agitate water flow, the blockage problem caused by the deposition of broken stones, sediment and crystals can be effectively prevented, in the actual operation process of a tunnel, along with the lengthening of the operation time, partial sediment with larger particles and heavier weight can be deposited in the arc-shaped pipe 7, the blockage possibility still exists, the problem of blockage once occurs is solved, the problem is quite troublesome, the large economic loss can be caused, the infusion cavity 15 is arranged to avoid the problem, in the actual construction process, the infusion cavity 15 is communicated with the corresponding pipeline, the cleaning agent can be introduced into the infusion cavity 15 through the corresponding pipeline after the tunnel is operated for a period of time, the cleaning agent can use clear water or acid liquid, and the like, when clear water is used, the clear water is pressed into the infusion cavity 15 by using a high-pressure pump, then the water with pressure flows into the arc-shaped pipe 7, the sediment is taken away in the arc-shaped pipe 7, and the purpose of cleaning the arc-shaped pipe 7 is achieved; when an acidic liquid is used, the acidic liquid is introduced into the transfusion cavity 15 and then flows into the arc tube 7, and the acidic liquid reacts with magnesium calcium crystals such as calcium carbonate and the like, so that the chemical crystals are removed, and the arc tube 7 is cleaned. During actual use, the soil and stone conditions of the tunnel surrounding rock 1 can be specifically analyzed, and a proper cleaning agent is selected according to the actual conditions, so that a good cleaning effect is achieved.

Preferably, the length of the water diversion hole 11 is 2-6 m, the specific depth can be determined according to the actual condition of the surrounding rock 1, the water diversion pipe 10 is determined according to the length of the water diversion hole 11 as long as the surrounding rock water is discharged conveniently, and the water is discharged conveniently.

Claims (6)

1. The utility model provides a do benefit to tunnel drainage device of tunnel country rock water quick discharge, including setting gradually primary support (2), anti-drainage layer and secondary lining (3) in country rock (1), anti-drainage layer has set gradually ring to drain pipe (4), geotechnique's cloth (5) and waterproof board (6) from outer to interior, its characterized in that, ring to drain pipe (4) are including arc pipe (7) of symmetry setting and upper end shutoff, and the cross-sectional shape of arc pipe (7) is the rectangle, all is provided with a plurality of vortex subassemblies along its water flow direction interval in every arc pipe (7), vortex subassembly is including a reposition of redundant personnel strip (8) and two that set gradually flow strip (9), and reposition of redundant personnel strip (8) are located the middle part of arc pipe (7), and two flow strip (9) symmetrical arrangement are at the top and the bottom of arc pipe (7), the interval is provided with water diversion pipe (10) of a plurality of tip on arc pipe (7), be provided with water diversion hole (11) in country rock (1), water diversion pipe (10) tip portion of penetrating through behind the primary support (2) water diversion hole (10) are gone into in the water diversion hole (10), water diversion hole (12 are processed.

2. The tunnel drainage device beneficial to rapid drainage of surrounding rock water of a tunnel according to claim 1, wherein the cross sections of the diversion strips (8) and the flow gathering strips (9) are triangular, sharp corners of the diversion strips (8) are opposite to the water flow direction, and sharp corners of the two flow gathering strips (9) are arranged in opposite directions.

3. The tunnel drainage device beneficial to rapid drainage of tunnel surrounding rock water according to claim 1, wherein a plurality of annular plates (13) are arranged on the water diversion pipe (10) at intervals, and the outer edges of the annular plates (13) are abutted against the wall of the water diversion hole (11).

4. The tunnel drainage device facilitating rapid drainage of tunnel surrounding rock water according to claim 1, wherein a filter screen (14) is arranged on the inner wall of the water diversion hole (11).

5. The tunnel drainage device beneficial to rapid drainage of tunnel surrounding rock water according to claim 1, wherein the top of the arc-shaped pipe (7) is provided with an infusion cavity (15) in a sealing way, and a liquid outlet hole communicated with the infusion cavity (15) is formed in the pipe wall of the arc-shaped pipe (7).

6. The tunnel drainage device facilitating rapid drainage of tunnel surrounding rock water according to claim 1, wherein the length of the diversion hole (11) is 2-6 meters.