Novel tunnel drainage structure

Abstract

The utility model discloses a novel tunnel drainage structure which comprises a water collecting pit, a vertical drainage pipe, a horizontal drainage pipe and a pump room, the water collecting pit is arranged at the lowest point of a tunnel, the vertical drainage pipe is vertically arranged at the bottom of the water collecting pit, and the horizontal drainage pipe is arranged below a pipe piece at the position, corresponding to the tunnel, of the vertical drainage pipe. One end of the horizontal drainage pipe is communicated with the pump room, and the other end of the horizontal drainage pipe is connected with the vertical drainage pipe through an elbow assembly to form an L-shaped connection structure. The design is simple in structure and convenient to construct. Compared with a traditional drainage structure, the installation position and elevation of the drainage pipe can be accurately controlled, it is ensured that the installation position of the drainage pipe and a ballast bed embedded part system is kept consistent, the position conflict between the drainage pipeline and the structure in the tunnel is avoided, and meanwhile the effects of low construction cost, few pipe piece damage faces, remarkable drainage efficiency, not prone to water accumulation in the tunnel and the like are achieved.

Description

Technical Field

[0001] This utility model relates to the field of tunnel drainage construction technology, specifically a tunnel drainage structure. Background Technology

[0002] Traditionally, drainage pipes for the sump pit at the pump house of a tunnel connecting passage are made of galvanized steel pipes and installed on the side of the sump pit. During construction, holes are first drilled into the side of the lower segments of the already formed shield tunnel to the pump house of the connecting passage. Galvanized drainage pipes are pre-installed in the drilled holes and extended to the designed location of the sump pit. Subsequently, the tunnel track bed concrete is used to cover the sump pit, forming a drainage channel between the pump house and the connecting passage. This technology has the following drawbacks: ① Due to the limitations of the curved surface structure of the circular tunnel and the subsequent concrete track bed structure, the planar position and elevation of the drainage steel pipes are difficult to control. The installation of the drainage pipes suffers from systematic deviations in position and elevation, and rectification is difficult and costly, affecting the drainage effect after use; ② The drainage pipes have a large diameter and intersect with the curved surface of the tunnel segments. The drilling process can damage the tunnel segments, affecting the waterproofing and durability of the tunnel structure; ③ The drainage pipes are located a certain position above the bottom of the sump pit, making it easy for water to accumulate at the bottom of the sump pit. Utility Model Content

[0003] To address the aforementioned issues, this invention provides a novel L-shaped drainage structure for tunnels with high applicability. This structure features low construction costs, minimal damage to the tunnel and tunnel lining segments, strong adaptability to construction schedules, significant drainage efficiency, and reduced water accumulation within the tunnel. It allows for precise control of the drainage pipe installation elevation, ensuring consistency with the design position of the track bed embedded components system, avoiding positional conflicts between the drainage pipes and the tunnel's internal structures, and improving drainage efficiency.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a novel tunnel drainage structure, including a sump, a vertical drainage pipe, a horizontal drainage pipe and a pump house. The sump is set at the lowest point of the tunnel. The vertical drainage pipe is set vertically at the bottom of the sump. The horizontal drainage pipe is set below the segment of the vertical drainage pipe at the tunnel position corresponding to the vertical drainage pipe. One end of the horizontal drainage pipe is connected to the pump house, and the other end is connected to the vertical drainage pipe through an elbow assembly to form an "L"-shaped connection structure.

[0005] Furthermore, the vertical drain pipe is equipped with a filter device.

[0006] Furthermore, an operating platform is provided inside the pump room.

[0007] Furthermore, one end of the horizontal drainage pipe is connected to the pump house via a flexible waterproof sleeve, which facilitates construction.

[0008] Furthermore, the vertical and horizontal drainage pipes are made of galvanized pipe, which has good weather resistance.

[0009] Furthermore, the horizontal drainage pipe is installed by splicing multiple horizontal pipe sections, which facilitates construction.

[0010] The beneficial effects of this utility model are: the design structure is simple and convenient for construction. Compared with traditional drainage structures, it can precisely control the installation position and elevation of the drainage pipe, ensuring consistency with the design position of the track bed embedded parts system, avoiding positional conflicts between the drainage pipe and the tunnel structure, and also has the effects of low construction cost, less damage to the pipe segments, significant drainage efficiency, and less water accumulation in the tunnel. Before the pipe is installed, positioning holes need to be drilled at the bottom of the pipe segments in the pump house and the sump pit respectively. Galvanized steel pipes are used and the pipes are installed by a combination of socket and threaded connections. The gap between the outer wall of the drainage pipe and the pipe segment is sealed by grouting to ensure waterproof sealing performance. A cylindrical filter device is installed at the top of the vertical drainage pipe to filter debris in the water in the sump pit and facilitate debris cleaning, preventing the drainage pipe from being blocked by debris accumulation in the water. The location and elevation of the pipelines in this design are not affected by the tunnel segments and concrete track bed structure. The drainage pipelines are set in the sump and at the bottom of the segments, which is convenient to construct, low in cost, has good drainage efficiency, and prevents water accumulation in the tunnel. A filter device is installed at the water inlet of the drainage pipe to facilitate the filtration and cleaning of debris entering the pump room. The drainage pipeline is not easy to clog, causes little damage to the tunnel structure, and will not have a significant impact on the waterproofing and durability of the tunnel structure. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] A novel tunnel drainage structure, such as Figure 1 As shown, the system includes a sump 12, a vertical drainage pipe 8, a horizontal drainage pipe 6, and a pump house 1. The pump house 1 has side walls 2 around its perimeter and an operating platform 3 inside. The sump 12 is located at the lowest point of the tunnel, and a track bed 11 is provided on the sump 12. The vertical drainage pipe 8 is vertically installed at the bottom of the sump 12, and a filter device 9 is installed at its top. The horizontal drainage pipe 6 is located below the tunnel segment 10 corresponding to the vertical drainage pipe 8. One end of the horizontal drainage pipe 8 is connected to the pump house 1 via a flexible waterproof sleeve 4, and the other end is connected to the vertical drainage pipe via an elbow assembly to form an "L"-shaped connection structure.

[0014] Furthermore, the vertical drain pipe 8 and the horizontal drain pipe 6 are made of galvanized pipe, which has good weather resistance.

[0015] The construction steps in this embodiment are as follows:

[0016] 1. An operating platform 3 is manually erected inside pump house 1. Surveyors measure and mark the positions inside pump house 1 and in the track bed sump 12. Workers begin drilling horizontal holes 5 inside pump house 1, and then drill vertical holes at the segment locations according to the surveyors' markings. This allows for precise control of the installation elevation of vertical drainage pipes 8 and horizontal drainage pipes 6, avoiding spatial conflicts in the track area. Horizontal drainage pipes 6 are installed in sections, consisting of 4 segments, each 1 meter long. The first horizontal pipe segment has an external threaded interface at one end, and the other end is connected to a 90° elbow via a socket joint (the elbow installation height must not exceed the inner diameter of the drilled hole). The remaining horizontal pipe segments use prefabricated joints with external threads at one end and internal threads at the other, achieving pipe segment splicing through threaded connections. The specific installation process is as follows: After connecting the first horizontal pipe section with the 90° elbow socket, insert it into the horizontal drill hole; install the second, third and fourth horizontal pipe sections in sequence, and complete the installation of the horizontal drainage pipe 6 by threaded connection; after installation, ensure that the end of the horizontal pipe section with elbow extends to the designated position at the bottom of the segment; the other end of the vertical elbow is connected to the vertical drainage pipe 8 by socket, and the operator needs to manually connect the vertical drainage pipe 8 and the elbow of the horizontal drainage pipe 6; leave a grouting gap between the vertical drainage pipe 8 and the segment structure, and fill the grouting body 7 after the grouting hole is set.

[0017] 2. After the horizontal drainage pipe 6 system is installed, seepage prevention treatment shall be carried out according to the following procedures: A flexible waterproof sleeve 4 shall be installed at the side wall 2 of pump house 1 to effectively prevent ground water from seeping into pump house 1 along the pipe wall; a grouting pipe and vent shall be pre-embedded in the side wall 2 of pump house 1. The grouting operation shall meet the following requirements: special grouting material shall be used to fill the gap between the horizontal pipe wall and the ground. The status of the vent shall be monitored in real time during the grouting process. When the grout overflows from the vent, it indicates that the gap outside the pipe has been filled tightly. The gap between the vertical pipe wall and the pipe segment shall be grouted in the same way to ensure that the annular space is fully filled. After the filling operation is completed, the exposed grouting pipe shall be cut off. Finally, the filter device shall be installed at the port of the vertical drainage pipe 8 to ensure that the water entering the pump house is effectively filtered.

[0018] Unlike traditional drainage pipes located on the side of the sump inside the tunnel, this embodiment employs an L-shaped drainage pipe design. The vertical drainage pipe 8 is positioned at the bottom of the sump, while the horizontal drainage pipe 6 is positioned at the bottom of the tunnel segments. The position and elevation of the pipes are unaffected by the tunnel segments and concrete track bed structure, resulting in high precision control and excellent drainage efficiency. A filter device is installed at the end of the vertical drainage pipe to filter and periodically clean debris from the sump, preventing clogging.

[0019] The above description is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Any simple equivalent changes and modifications made in accordance with the scope of the present utility model patent application and the description of the utility model shall still fall within the scope of the present utility model patent.

Claims

1. A novel tunnel drainage structure, characterized in that, It includes a sump, a vertical drainage pipe, a horizontal drainage pipe, and a pump house. The sump is located at the lowest point of the tunnel. The vertical drainage pipe is vertically installed at the bottom of the sump. The horizontal drainage pipe is installed below the tunnel segment corresponding to the vertical drainage pipe. One end of the horizontal drainage pipe is connected to the pump house, and the other end is connected to the vertical drainage pipe through an elbow assembly to form an "L"-shaped connection structure.

2. The novel tunnel drainage structure according to claim 1, characterized in that, The vertical drain pipe is equipped with a filter.

3. The novel tunnel drainage structure according to claim 1, characterized in that, An operating platform is provided inside the pump room.

4. The novel tunnel drainage structure according to claim 1, characterized in that, One end of the horizontal drainage pipe is connected to the pump house via a flexible waterproof sleeve.

5. A novel tunnel drainage structure according to claim 1, characterized in that, The vertical and horizontal drainage pipes are made of galvanized pipes.

6. The novel tunnel drainage structure according to claim 1, characterized in that, The horizontal drainage pipe is installed by splicing multiple horizontal pipe sections.

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