Structure for repairing and treating damage of underground drainage pipe in tunnel

Abstract

The utility model relates to the technical field of tunnel engineering disease prevention and control, in particular to a tunnel inner drainage concealed conduit damage disease repair and treatment structure which comprises a pump pipe, one end of the pump pipe is communicated with a pump room water collecting pit, and the other end of the pump pipe is communicated with a drainage concealed ditch of a tunnel. A steel pipe is arranged in the damaged position of the pump pipe, and the outer wall of the steel pipe is fixedly connected with the inner wall of the pump pipe and blocks the damaged position. A first grouting layer is arranged on the periphery of the damaged position of the pump pipe, a second grouting layer is arranged on the periphery of the first grouting layer, a third grouting layer is arranged above the second grouting layer, and the upper surface of the third grouting layer is the bottom face of the tunnel channel. The problem of repairing the damaged point of the underground drainage pipe can be solved in a targeted mode, and the original drainage capacity can be kept.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel engineering disease prevention and control, and in particular to a structure for repairing and treating damaged hidden drainage pipes in tunnels. Background Art

[0002] Tunnel structure water leakage is the main disease that affects the normal use of tunnels, and it poses a serious safety hazard to the safe operation of trains, the riding experience of passengers, and the normal operation of equipment. The tunnel section drainage ditch is connected to the section pump room through a transverse drainage pipe, and the water in the section drainage ditch is discharged to the pump room sump through the transverse drainage pipe. The transverse drainage pipe is led out from the section drainage ditch and then passes through the stratum soil and is introduced into the pump room sump. With the operation of the operation, problems such as construction quality, environmental vibration, and uneven settlement began to appear, resulting in damage or breakage of the transverse drainage pipe, which will cause a large amount of stratum water to flow into the pump room sump. If it is a fine sand layer, the water will carry a large amount of fine sand into the pump room sump, which will not only cause a sharp increase in the drainage volume of the pump room, but also the gushing water and sand will hollow out the stratum, which will have a serious impact on the safe operation of the section.

[0003] The existing pump pipe leakage treatment method mainly involves inserting a casing into the existing pump pipe, fixing the casing, and then filling the gap between the casing and the pump pipe. The inner diameter of the casing is inevitably smaller than the original pump pipe. Therefore, the shortcomings of the existing treatment method include:

[0004] (1) Inserting a casing into the original pump pipe is equivalent to reducing the drainage capacity of the drainage pipe, which does not meet the drainage needs and construction specifications;

[0005] (2) The existing treatment methods only treat the leakage location, but do not effectively treat the hollowed-out area of ​​the stratum, which poses a safety hazard to the tunnel structure;

[0006] (3) The filler between the casings is usually unable to effectively fill the entire casing gap. Under the action of long-term water pressure, the filler is easily washed away and leakage occurs again;

[0007] (4) The existing treatment method does not monitor the conditions in the drainage ditch of the roadbed, and cannot effectively grasp the conditions in the drainage ditch during the entire construction process;

[0008] (5) When there is high water pressure, inserting the casing and effectively filling the casing gap will cause certain difficulties and construction risks.

[0009] Therefore, there is an urgent need to provide a repair and management structure for damaged underground drainage pipes in tunnels, which can specifically solve the problem of repairing damaged points of underground drainage pipes, and can also solve the safety problems caused by stratum hollowing and the durability of management effects. Utility Model Content

[0010] In order to solve at least one technical problem existing in the prior art, the utility model provides a structure for repairing and treating damaged hidden drainage pipes in a tunnel.

[0011] To achieve the above purpose, the technical solution of the utility model is as follows:

[0012] A structure for repairing and treating damaged hidden drainage pipes in a tunnel comprises a pump pipe, one end of which is connected to a sump in a pump room, and the other end of which is connected to a hidden drainage ditch in the tunnel; a steel pipe is arranged inside the damaged position of the pump pipe, and the outer wall of the steel pipe is fixedly connected to the inner wall of the pump pipe to seal the damaged position; a first grouting layer is arranged around the damaged position of the pump pipe, a second grouting layer is arranged around the first grouting layer, a third grouting layer is arranged above the second grouting layer, and the upper surface of the third grouting layer is the bottom surface of the tunnel passage.

[0013] Furthermore, a vertical grouting hole is arranged above the pump pipe, and the lower end of the vertical grouting hole passes through the second grouting layer and extends into the first grouting layer; the upper end of the vertical grouting hole is located at the bottom surface of the tunnel passage.

[0014] Furthermore, a horizontal grouting hole is arranged above the pump pipe, the horizontal grouting hole is arranged in the third grouting layer at the bottom of the tunnel passage, and the grouting port of the horizontal grouting hole is arranged in the sump of the pump room.

[0015] Furthermore, an inclined grouting hole is arranged above the pump pipe, the grouting port of the inclined grouting hole is arranged on the inner wall of the tunnel, and the lower end of the inclined grouting hole is arranged in the first grouting layer.

[0016] Furthermore, the steel pipe and the pump pipe are fixedly connected by bonding steel glue.

[0017] Furthermore, the length of the steel pipe is 400-800 mm.

[0018] Furthermore, the outer diameter of the steel pipe is 20-30 mm smaller than the inner diameter of the pump pipe.

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

[0020] The utility model provides a repair and treatment structure for damaged hidden drainage pipes in tunnels. Three grouting reinforcements are performed on the periphery of the damaged point of the pump pipe, namely the first grouting layer, the second grouting layer and the third grouting layer. The first grouting layer is filled with reinforcement grouting materials to reinforce and stop the damaged point of the pump pipe. The third grouting layer is used to reinforce the hollowed-out area of ​​the stratum. This extends the service life of the damaged point after repair and improves the safety of tunnel operation. The damaged position is sealed with a shorter steel pipe, which has almost no effect on the drainage capacity of the pump pipe. It can not only solve the problem of repairing the damaged point of the underground drainage pipe in a targeted manner, but also maintain the original drainage capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model is a schematic diagram of the structure for repairing and treating damaged hidden drainage pipes in tunnels.

[0022] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0023] Reference numerals:

[0024] 1. Pump pipe, 2. Drainage ditch, 3. Ground hollowing area, 4. Pump room sump, 5. Steel pipe, 6. First grouting layer, 7. Second grouting layer, 8. Third grouting layer. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of the utility model.

[0026] It should be noted that, unless otherwise specifically stated, the relative arrangements and numerical expressions of the components and steps described in these embodiments should not be construed as limiting the scope of the present invention.

[0027] The following description of the exemplary embodiments is merely illustrative and does not in any sense limit the present invention and its application or use. The techniques, methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail here, but in the case of applying these techniques, methods and devices, these techniques, methods and devices should be regarded as part of this specification.

[0028] The utility model also provides a structure for repairing and treating damaged drainage pipes in tunnels, such as Figure 1 and Figure 2As shown, it includes a pump pipe 1, one end of which is connected to a sump 4 in a pump room, and the other end of which is connected to a drainage ditch 2 in a tunnel; a steel pipe 5 is arranged inside the damaged position of the pump pipe 1, and the outer wall of the steel pipe 5 is fixedly connected to the inner wall of the pump pipe 1 by using steel glue, and the steel pipe 5 blocks the damaged position; a first grouting layer 6 is arranged around the damaged position of the pump pipe 1, a second grouting layer 7 is arranged around the first grouting layer 6, a third grouting layer 8 is arranged above the second grouting layer 7, and the upper surface of the third grouting layer 8 is the bottom surface of the tunnel passage.

[0029] A vertical grouting hole is arranged above the pump pipe 1, and the lower end of the vertical grouting hole passes through the second grouting layer 7 and extends into the first grouting layer 6; the upper end of the vertical grouting hole is located at the bottom surface of the tunnel passage. A horizontal grouting hole is also arranged above the pump pipe 1, and the horizontal grouting hole is arranged in the third grouting layer 8 at the bottom of the tunnel passage, and the grouting port of the horizontal grouting hole is arranged in the sump 4 of the pump room. An inclined grouting hole is also arranged above the pump pipe 1, and the grouting port of the inclined grouting hole is arranged on the inner wall of the tunnel, and the lower end of the inclined grouting hole is arranged in the first grouting layer 6.

[0030] The length of the steel pipe 5 is 400-800 mm, and the specific length is determined according to the size of the damage point of the pump pipe. The outer diameter of the steel pipe 5 is 20-30 mm smaller than the inner diameter of the pump pipe.

[0031] The implementation principle of the utility model is:

[0032] S1. Determine the damaged point of the pump pipe; specifically: build an operating platform in the sump of the pump room, insert the camera into the pump pipe to detect the damaged position of the pump pipe, and determine the damaged point of the pump pipe. Since the pump pipe 1 is damaged, the water in the drainage ditch 2 is discharged into the pump pipe 1, and then flows up into the stratum through the damaged point. The sand in the stratum flows into the pump pipe and then into the sump 4 of the pump room, forming a stratum hollowing area 3 in the stratum, which leads to certain safety hazards in the passage.

[0033] S2. After the damaged point of the pump pipe is determined, impurities inside the pump pipe 1 are cleaned so as to subsequently treat the inside of the pump pipe 1 , and impurities at the bottom of the channel above the pump pipe 1 are cleaned so as to treat the hollowed-out area 3 of the stratum.

[0034] S3. Insert a hole sealer into the pump pipe 1 and use the hole sealer to seal the damaged point of the pump pipe; insert the hole sealer from the water outlet end of the pump pipe in the pump room sump 4, position the hole sealer at the damaged point of the pump pipe, pressurize the hole sealer to expand it, and seal the damaged point of the pump pipe.

[0035] S4. Drill a hole vertically downward in the channel above the pump pipe 1. The drilling position corresponds to the damaged point of the pump pipe. Install a vertical grouting pipe in the hole. The vertical grouting pipe is a spherical diffusion grouting pipe. Then place the video imaging system in the tunnel drainage ditch 2, and then perform grouting. Use the video imaging system to observe the grouting situation. The grouting material is an emergency water-stopping grouting material to temporarily block the damaged point of the pump pipe. After grouting, the water-stopping layer formed is approximately spherical and surrounds the damaged point of the pump pipe.

[0036] S5. Build a work platform in the sump 4 of the pump room, and use an electric drill to drill a horizontal hole in the stratum at the bottom of the channel above the pump pipe 1. Install a horizontal grouting pipe in the borehole, which is a columnar diffusion grouting pipe, and then inject a reinforcement grouting material, which fills and reinforces the hollowed-out area 3 of the stratum.

[0037] S6. Drill an oblique hole from the tunnel side wall to the damaged point of the pump pipe, install an inclined grouting pipe in the hole, and then use the point-diffusion grouting pipe to inject reinforcement grouting material. The formed water-stop grouting area is located around the damaged point of the pump pipe and inside the water-stop layer formed by the vertical grouting pipe.

[0038] S7. Take out the hole sealer and clean and polish the inner wall of the damaged part of the pump tube;

[0039] S8, insert the steel pipe 5 into the damaged point of the pump pipe, and fix the steel pipe 5 to the inner wall of the pump pipe 1. Then, multiple water stopping effects are achieved at the damaged point of the pump pipe, and the effectiveness of water stopping is improved.

[0040] Example 1

[0041] This embodiment is aimed at treating the water gushing from the damaged hidden drainage pipe in the pump room of a shield tunnel section with a steel spring track bed. The station of this project is designed for secondary waterproofing. The section has been in operation for more than ten years. With the rise of the groundwater level in the area, water leakage was found in the pump pipe during the inspection. The damaged point of the pump pipe was found through the video imaging system. Water and sand gushed out from the damaged point of the pump pipe, causing the stratum near the pump pipe to be hollowed out, which had a serious impact on the safe operation of the section. The damaged hidden drainage pipe repair and treatment structure in the tunnel provided by the utility model was used. After treatment, the leakage position was blocked, and there was no leakage or re-leakage, so the purpose of water for maintenance was achieved.

[0042] The above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A structure for repairing and treating damaged drainage pipes in tunnels, characterized in that: It comprises a pump pipe, one end of which is connected to a sump in a pump room, and the other end of which is connected to a drainage ditch in a tunnel; a steel pipe is arranged inside the damaged position of the pump pipe, and the outer wall of the steel pipe is fixedly connected to the inner wall of the pump pipe and seals the damaged position; a first grouting layer is arranged outside the damaged position of the pump pipe, a second grouting layer is arranged outside the first grouting layer, a third grouting layer is arranged above the second grouting layer, and the upper surface of the third grouting layer is the bottom surface of the tunnel passage.

2. The structure for repairing and treating damaged hidden drainage pipes in tunnels according to claim 1 is characterized in that: A vertical grouting hole is arranged above the pump pipe, and the lower end of the vertical grouting hole passes through the second grouting layer and extends into the first grouting layer; the upper end of the vertical grouting hole is located at the bottom surface of the tunnel passage.

3. The structure for repairing and treating damaged hidden drainage pipes in tunnels according to claim 1 or 2, characterized in that: A horizontal grouting hole is also arranged above the pump pipe. The horizontal grouting hole is arranged in the third grouting layer at the bottom of the tunnel passage. The grouting port of the horizontal grouting hole is arranged in the sump of the pump room.

4. The structure for repairing and treating damaged hidden drainage pipes in tunnels according to claim 3 is characterized in that: An inclined grouting hole is also arranged above the pump pipe, the grouting port of the inclined grouting hole is arranged on the inner wall of the tunnel, and the lower end of the inclined grouting hole is arranged in the first grouting layer.

5. The structure for repairing and treating damaged hidden drainage pipes in tunnels according to claim 1 is characterized in that: The length of the steel pipe is 400-800 mm.

6. The structure for repairing and treating damaged hidden drainage pipes in tunnels according to claim 1 is characterized in that: The outer diameter of the steel pipe is 20-30 mm smaller than the inner diameter of the pump pipe.

7. The structure for repairing and treating damaged hidden drainage pipes in tunnels according to claim 1 is characterized in that: The steel pipe is bonded and fixed to the inner wall of the pump pipe by using steel adhesive.

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