A sidewall water storage chamber for operation and maintenance of tunnel central drainage ditch

Abstract

This utility model discloses a sidewall water storage cavern for the operation and maintenance of a tunnel central drainage ditch, belonging to the field of tunnel construction. It includes a tunnel central drainage ditch, with multiple water storage caverns spaced along the tunnel sidewall. Each water storage cavern has an entrance / exit pre-installed at its upper part, connecting to the tunnel interior, and a sealing door is provided at each entrance / exit. The water storage caverns are connected to the tunnel central drainage ditch via a buried transverse water diversion branch ditch. The bottom elevation of the water storage cavern is lower than that of the tunnel central drainage ditch. By excavating caverns in the tunnel sidewall to construct water storage caverns and connecting them to the tunnel central drainage ditch via buried transverse water diversion branches, a tunnel central drainage ditch inspection passage is provided for workers through the water storage caverns and the buried transverse water diversion branches. This allows conventional tunnel inspection manholes to be moved from below the tunnel surface to the tunnel sidewall, effectively avoiding the spatial conflict between tunnel central drainage ditch maintenance operations and traffic within the tunnel.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel construction technology, specifically relating to a sidewall water storage chamber for the operation and maintenance of the central water ditch in a tunnel. Background Technology

[0002] The central drainage ditch in a tunnel is the main channel for draining groundwater from the tunnel to the outside. Blockage of this ditch can cause a series of problems, including water backflow onto the road surface and leakage through the sidewalls. Therefore, the operation and maintenance of the central drainage ditch are crucial. In existing projects, inspection wells or sedimentation wells are typically placed along the central drainage ditch at certain intervals. However, because these wells are located below the tunnel surface, there is a spatial conflict between maintenance work on the central drainage ditch and traffic within the tunnel.

[0003] Therefore, in order to avoid the interference of tunnel central ditch maintenance operations on traffic inside the tunnel, it is of great practical significance to study a sidewall water storage chamber for the operation and maintenance of tunnel central ditch. Utility Model Content

[0004] In order to solve the above problems, this utility model aims to provide a sidewall water storage chamber for the operation and maintenance of the central drainage ditch in a tunnel.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A sidewall water storage cavern for operation and maintenance of a tunnel central drainage ditch includes a tunnel central drainage ditch and multiple water storage caverns spaced along the tunnel sidewall. The upper part of the water storage cavern has reserved entrances and exits that connect to the inside of the tunnel, and the entrances and exits are equipped with cavern opening closure doors. The water storage cavern is connected to the tunnel central drainage ditch through a buried transverse water diversion branch ditch. The bottom elevation of the water storage cavern is lower than the bottom elevation of the tunnel central drainage ditch.

[0007] A cable trench is installed inside the tunnel near the tunnel sidewall. The cable trench is located above the buried transverse water diversion branch trench, and the inlet and outlet of the water storage chamber are not lower than the top surface of the cable trench.

[0008] The water storage cavern is equipped with a ladder, which is located on the side near the entrance and exit of the water storage cavern.

[0009] All of the aforementioned water storage chambers are located on the sidewalls of tunnels where there are no water outlets.

[0010] The water storage chamber is located near the tunnel sidewall with water outlets, which include a concentrated water outlet on the tunnel sidewall and a concentrated water outlet at the bottom of the tunnel invert.

[0011] A drainage channel is installed inside the tunnel sidewall, with one end connected to the centralized water outlet of the tunnel sidewall and the other end connected to the water storage chamber.

[0012] A counter-pressure drainage pipe is buried on the lower side of the buried transverse water diversion branch ditch, and the counter-pressure drainage pipe is connected to the centralized water outlet at the bottom of the tunnel invert arch.

[0013] The top of the buried transverse water diversion branch ditch is equipped with a branch ditch cover plate. The bottom plate of the buried transverse water diversion branch ditch is inclined downward at one end near the water storage cavern to the other end, and the bottom plate at the upper end of the buried transverse water diversion branch ditch is flush with the bottom of the central drainage ditch of the tunnel.

[0014] The elevation of the bottom plate of the water storage cavern is lower than the elevation of the bottom plate of the lower end of the buried transverse water diversion branch ditch, and the elevation difference is 0.5m to 1m.

[0015] The two adjacent water storage chambers are connected by corrosion-resistant steel ropes, and the middle of the corrosion-resistant steel ropes is arranged in the buried transverse water diversion branch ditch and the central drainage ditch of the tunnel.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] (1) By excavating a cavern in the sidewall of the tunnel to build a water storage cavern, and connecting the water storage cavern with the central drainage ditch of the tunnel through a buried transverse water diversion ditch, a central drainage ditch inspection passage for workers is provided through the water storage cavern and the buried transverse water diversion ditch, so as to move the conventional tunnel inspection well from below the tunnel road surface to the sidewall of the tunnel, thereby effectively avoiding the spatial conflict between the maintenance work of the central ditch of the tunnel and the traffic in the tunnel.

[0018] (2) The location of the water storage cavern is flexible. It can be selectively set near the concentrated water outlet point of the surrounding rock or the water outlet point of the karst channel, and can then serve as a concentrated water collection cavern for the water outlet point. The transverse branch ditch of the channel will quickly drain the collected groundwater to the central water ditch of the tunnel, which can effectively avoid problems such as water leakage from the tunnel sidewall.

[0019] (3) The water storage cavern is connected to the central drainage ditch of the tunnel through a buried transverse water diversion branch ditch. It stores a certain amount of groundwater all year round and can be used as a water intake point in case of emergency.

[0020] (4) Corrosion-resistant steel ropes are arranged between two adjacent water storage caverns to facilitate the use of corrosion-resistant steel ropes 10 to drag high-pressure water pipes and other pipeline flushing equipment or maintenance equipment to carry out corresponding water ditch maintenance work. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the specific embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a structural diagram of the sidewall water storage cavern in Embodiment 1 of this utility model;

[0023] Figure 2 This is a structural diagram of the sidewall water storage cavern in Embodiment 2 of this utility model;

[0024] Figure 3 This is a top view of the water storage chamber in the side wall of this utility model;

[0025] In the diagram, 1-tunnel central drainage ditch; 2-water storage chamber; 3-chamber entrance sealing door; 4-buried transverse water diversion branch ditch; 5-branch ditch cover; 6-ladder; 7-sidewall drainage trough; 8-back pressure drainage pipe; 9-cable trench; 10-corrosion resistant steel rope; A-centralized water outlet point of tunnel sidewall; B-centralized water outlet point at the bottom of tunnel invert. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. Any modifications, substitutions and alterations made based on ordinary technical knowledge and conventional means in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0027] Example 1: Refer to Figure 1 and Figure 3 A sidewall water storage cavern for the operation and maintenance of a central drainage ditch in a tunnel includes a central drainage ditch 1 and multiple water storage caverns 2 spaced along the tunnel sidewall. Each water storage cavern 2 has an entrance / exit pre-installed at its upper part, connecting to the tunnel interior, and each entrance / exit is equipped with a cavern entrance sealing door 3. The water storage cavern 2 is connected to the central drainage ditch 1 via a buried transverse water diversion branch ditch 4. The bottom elevation of the water storage cavern 2 is lower than the bottom elevation of the central drainage ditch 1. The cavern entrance sealing door 3 is made of sheet metal or other materials and should be locked under normal circumstances, allowing only access for tunnel operation and maintenance personnel or fire and rescue personnel.

[0028] A cable trench 9 is installed inside the tunnel near the tunnel sidewall. The cable trench 9 is located above the buried transverse water diversion branch trench 4, and the entrance and exit of the water storage chamber 2 are not lower than the top surface of the cable trench 9. This facilitates personnel or equipment to enter and exit the water storage chamber 2 using the top surface of the cable trench 9. The water storage chamber 2 and the tunnel sidewall form a semi-enclosed structure.

[0029] A ladder 6 is installed inside the water storage cavern 2, and the ladder 6 is located on the side near the entrance and exit of the water storage cavern 2. A ladder 6 is also installed inside the side wall water storage cavern 2 for personnel to climb up and down.

[0030] The multiple water storage chambers 2 are all located on the sidewalls of tunnels without water outlets.

[0031] A back pressure drainage pipe 8 is buried on the lower side of the buried transverse water diversion branch 4, and the back pressure drainage pipe 8 is connected to the centralized water outlet B at the bottom of the tunnel invert. Water from the centralized water outlet B at the bottom of the tunnel invert can be drained into the water storage chamber 2 through the back pressure drainage pipe 8.

[0032] The top of the buried transverse water diversion branch ditch 4 is equipped with a branch ditch cover plate 5. The bottom plate of the buried transverse water diversion branch ditch 4 is inclined downward at one end near the water storage chamber 2 and the bottom plate at the upper end of the buried transverse water diversion branch ditch 4 is flush with the bottom of the central drainage ditch 1 of the tunnel. The slope of the bottom plate of the buried transverse water diversion branch ditch 4 is not less than 0.3%.

[0033] The elevation of the bottom plate of the water storage cavern 2 is lower than the elevation of the bottom plate of the lower end of the buried transverse water diversion branch 4, and the elevation difference is 0.5m to 1m.

[0034] The two adjacent water storage chambers 2 are connected by corrosion-resistant steel ropes 10, with the middle of the corrosion-resistant steel ropes 10 arranged in the buried transverse water diversion branch ditch 4 and the central drainage ditch 1 of the tunnel. The corrosion-resistant steel ropes 10 are arranged between the two adjacent water storage chambers 2 to facilitate the use of the corrosion-resistant steel ropes 10 to drag high-pressure water pipes and other pipeline flushing equipment or maintenance equipment for corresponding ditch maintenance work.

[0035] By excavating a cavern in the tunnel sidewall to construct a water storage cavern 2, and connecting the water storage cavern 2 to the tunnel center drainage ditch 1 via a buried transverse water diversion branch ditch 4, a passage for workers to inspect the tunnel center drainage ditch 1 is provided through the water storage cavern 2 and the buried transverse water diversion branch ditch 4. This allows conventional tunnel inspection wells to be moved from below the tunnel road surface to the tunnel sidewall, effectively avoiding the spatial conflict between tunnel center ditch maintenance work and traffic inside the tunnel.

[0036] Example 2: Refer to Figure 2 and Figure 3 A sidewall water storage cavern for operation and maintenance of a central drainage ditch in a tunnel includes a central drainage ditch 1 in the tunnel and multiple water storage caverns 2 arranged at intervals along the tunnel sidewall. The upper part of the water storage cavern 2 is reserved with an entrance and exit that connects to the inside of the tunnel, and the entrance and exit are equipped with a cavern opening sealing door 3. The water storage cavern 2 is connected to the central drainage ditch 1 in the tunnel through a buried transverse water diversion branch ditch 4. The bottom elevation of the water storage cavern 2 is lower than the bottom elevation of the central drainage ditch 1 in the tunnel.

[0037] The water storage cavern 2 is located near the tunnel sidewall with water outlets, including a concentrated water outlet A on the tunnel sidewall and a concentrated water outlet B at the bottom of the tunnel invert. The location of the water storage cavern 2 is flexible; it can be selectively located near a concentrated water outlet in the surrounding rock or a water outlet in a karst channel, thus serving as a concentrated water collection cavern for the water outlets. The collected groundwater is then quickly discharged to the central drainage ditch 1 of the tunnel via a buried transverse water diversion branch ditch 4, effectively preventing problems such as water leakage from the tunnel sidewall.

[0038] A drainage channel 7 is installed inside the tunnel sidewall, with one end connected to the centralized water outlet A of the tunnel sidewall and the other end connected to the water storage chamber 2. The centralized water outlet of the tunnel sidewall can be drained into the water storage chamber 2.

[0039] The construction method for the water storage cavern 2 is as follows:

[0040] S0. During tunnel construction, the location of the water storage chamber 2 is excavated at the corresponding position, and then the outer support structure of the water storage chamber 2 is constructed.

[0041] If concentrated water outlets are found in the surrounding rock within the tunnel sidewall area during construction, a sidewall drainage channel 7 can be constructed at the relevant location to guide the groundwater into the water storage chamber 2;

[0042] S1. After the tunnel invert construction process, the positions of the tunnel center drainage ditch 1 and the buried transverse water diversion branch ditch 4 are reserved at the tunnel invert backfill position, and then the ditch body of the tunnel center drainage ditch 1 and the buried transverse water diversion branch ditch 4 is poured.

[0043] If a concentrated water outlet is found in the surrounding rock at the bottom of the tunnel invert during construction, a counter-pressure drainage pipe 8 can be constructed downwards at the bottom of the buried transverse water diversion branch 4. The counter-pressure drainage pipe 8 extends into the concentrated water outlet in the surrounding rock and introduces the groundwater into the buried transverse water diversion branch 4.

[0044] S2, the cover plate of the central drainage ditch 1 of the construction tunnel and the branch ditch cover plate 5, and then the road slab of the construction tunnel.

[0045] S3. Construction of the inner support structure of water storage chamber 2, secondary tunnel lining and cable trench, etc.

[0046] S4. Install the ladder 6 for the water storage cavern 2, and then install the reserved cavern entrance sealing door 3. This completes the construction of the side wall water storage cavern.

[0047] During subsequent construction, workers or maintenance equipment can enter the central drainage ditch 1 of the tunnel through the water storage chamber 2 to carry out maintenance work; when silt and sand accumulate in the water storage chamber 2, equipment such as silt pumps can be used to clean the silt and sand; when water is needed for fire fighting or maintenance work in the tunnel, water pumps can be used to pump water from the water storage chamber 2.

[0048] The foregoing has provided a detailed description of a sidewall water storage chamber for the operation and maintenance of a central drainage ditch in a tunnel, as provided by this utility model. Specific examples have been used to illustrate the structure and working principle of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this utility model.

Claims

1. A side wall water storage chamber for tunnel center water ditch operation maintenance, comprising a tunnel center drainage ditch (1), characterized in that: Multiple water storage chambers (2) are set at intervals along the tunnel sidewall. The upper part of the water storage chamber (2) is reserved with an entrance and exit that connects to the inside of the tunnel, and a chamber entrance sealing door (3) is set at the entrance and exit. The water storage chamber (2) is connected to the central drainage ditch (1) of the tunnel through a buried transverse water diversion branch ditch (4). The bottom elevation of the water storage chamber (2) is lower than the bottom elevation of the central drainage ditch (1) of the tunnel.

2. The side wall water storage chamber for tunnel center water channel operation inspection and maintenance according to claim 1, characterized in that: A cable trench (9) is installed inside the tunnel near the tunnel sidewall. The cable trench (9) is located above the buried transverse water diversion branch trench (4), and the inlet and outlet of the water storage chamber (2) are not lower than the top surface of the cable trench (9).

3. The side wall water storage chamber for tunnel center water channel operation inspection and maintenance according to claim 1, characterized in that: The water storage cavern (2) is equipped with a ladder (6), and the ladder (6) is located on the side near the entrance and exit of the water storage cavern (2).

4. The sidewall water storage chamber for operation and maintenance of the central drainage ditch in a tunnel as described in claim 1, characterized in that: Multiple water storage chambers (2) are located on the sidewalls of tunnels without water outlets.

5. The side wall water storage chamber for tunnel center water channel operation inspection and maintenance according to claim 1, characterized in that: The water storage chamber (2) is located near the tunnel sidewall with water outlets, including the concentrated water outlet (A) on the tunnel sidewall and the concentrated water outlet (B) at the bottom of the tunnel invert.

6. The side wall storage cavern for tunnel center water channel operation maintenance according to claim 5, characterized in that: A drainage channel (7) is installed inside the tunnel sidewall. One end of the channel is connected to the centralized water outlet (A) of the tunnel sidewall, and the other end is connected to the water storage chamber (2).

7. The side wall water storage chamber for tunnel center water channel operation inspection and maintenance according to claim 5, characterized in that: The lower side of the buried transverse water diversion branch ditch (4) is provided with a back pressure drainage pipe (8), which is connected to the centralized water outlet (B) at the bottom of the tunnel arch.

8. The side wall water storage chamber for tunnel center water channel operation inspection and maintenance according to claim 1, characterized in that: The top of the buried transverse water diversion branch ditch (4) is provided with a branch ditch cover plate (5). The bottom plate of the buried transverse water diversion branch ditch (4) is inclined downward at one end near the water storage cavern (2) and the bottom plate at the upper end of the buried transverse water diversion branch ditch (4) is flush with the bottom of the tunnel center drainage ditch (1).

9. The side wall storage cavern for tunnel center water channel operation maintenance according to claim 8, characterized in that: The elevation of the bottom plate of the water storage cavern (2) is lower than the elevation of the bottom plate of the buried transverse water diversion branch (4), and the elevation difference is 0.5m to 1m.

10. The side wall storage cavern for tunnel center water channel operation and maintenance according to claim 1, characterized in that: The two adjacent water storage caverns (2) are connected by corrosion-resistant steel ropes (10), and the middle part of the corrosion-resistant steel ropes (10) is arranged in the buried transverse water diversion branch (4) and the central drainage ditch (1) of the tunnel.

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