CN216008590U

CN216008590U - Drainage system at tunnel portal of rail transit

Info

Publication number: CN216008590U
Application number: CN202121398151.9U
Authority: CN
Inventors: 宫寅; 郭也清; 程锐; 李凤煜; 刘东娅
Original assignee: China Railway Shanghai Design Institute Group Co Ltd
Current assignee: China Railway Shanghai Design Institute Group Co Ltd
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2022-03-11
Anticipated expiration: 2031-06-23

Abstract

The utility model relates to the technical field of tunnel drainage, in particular to a drainage system at a tunnel entrance of a rail transit, which is characterized in that: this drainage system includes railway roadbed escape canal, sump pit, pre-buried drain pipe and rainwater pump house, and wherein railway roadbed escape canal extends to the tunnel from the tunnel entrance to the tunnel along the line direction, the sump pit sets up rainwater pump house one side just is located the railway roadbed both sides, the sump pit with the railway roadbed escape canal is connected and constitutes the intercommunication, the sump pit with the rainwater pump house passes through pre-buried drain pipe is connected and constitutes the intercommunication. The utility model has the advantages that: the efficient drainage at the tunnel portal of the rail transit tunnel is realized, and the drainage effect and the drainage efficiency are improved; the flow speed of water flow when the rainwater is large is effectively relieved, and the water flow is prevented from further entering the tunnel; simple structure is reasonable, and construction convenience just is convenient for later maintenance.

Description

Drainage system at tunnel portal of rail transit

Technical Field

The utility model relates to the technical field of tunnel drainage, in particular to a drainage system at a tunnel entrance of a rail transit tunnel.

Background

The rail transit projects are divided into underground lines, ground lines and overhead lines, wherein the underground lines are divided into rectangular tunnels, circular shield tunnels, U-shaped structures and the like. The U-shaped structure is connected with the rectangular tunnel, the rectangular tunnel is connected with the circular shield tunnel, the line enters the underground from the ground, then the rainwater of the ground line enters the rectangular tunnel through the U-shaped structure, and the rainwater in the rail running area is removed by arranging the rainwater pump room at the hole of the rectangular tunnel. The drainage of this department has the mode of setting up horizontal catch basin drainage through the railway roadbed face, nevertheless sets up horizontal catch basin effect through the railway roadbed face not good enough, especially is difficult to implement at the inboard horizontal ditch of curve in curve section, and leads to the drainage unsmooth because of the railway roadbed superelevation easily, can't slow down the rivers when the rainwater is great simultaneously.

Disclosure of Invention

The utility model aims to provide a drainage system at a tunnel entrance of rail transit, which is characterized in that a water collecting pit is reserved on the outer side of a track bed body at the tunnel entrance, and a drainage pipe is embedded to match with a track bed drainage ditch and a rainwater pump room, so that effective drainage of the tunnel entrance is realized.

The purpose of the utility model is realized by the following technical scheme:

the utility model provides a track traffic tunnel entrance to a cave department drainage system which characterized in that: this drainage system includes railway roadbed escape canal, sump pit, pre-buried drain pipe and rainwater pump house, and wherein railway roadbed escape canal extends to the tunnel from the tunnel entrance to the tunnel along the line direction, the sump pit sets up rainwater pump house one side just is located the railway roadbed both sides, the sump pit with the railway roadbed escape canal is connected and constitutes the intercommunication, the sump pit with the rainwater pump house passes through pre-buried drain pipe is connected and constitutes the intercommunication.

The two sides of two lines in the tunnel are respectively provided with the water collecting pits, and the water collecting pits are communicated through the embedded drain pipes; the water collecting pits are respectively and independently connected with the track bed drainage ditches.

Be provided with the horizontal ditch of railway roadbed between the railway roadbed escape canal, the horizontal ditch of railway roadbed follows the extending direction interval arrangement of railway roadbed escape canal.

The depth of the transverse ditch of the track bed is not less than that of the drainage ditch of the track bed.

The ballast bed drainage ditch is provided with a directional downward gradient from the tunnel portal to the inside of the tunnel along the line direction; the pre-buried drain pipe has a directional downward gradient towards the direction of the rainwater pump room.

A plurality of water retaining ridges are arranged in the track bed drainage ditch at intervals.

And the heights of the water retaining ridges are gradually increased from the tunnel portal to the inside of the tunnel along the line direction.

The water collecting pit is arranged in a way of being disconnected with a drainage ditch towards the drainage direction in the tunnel.

And a rainwater grate is arranged above the water collecting pit.

The utility model has the advantages that: the efficient drainage at the tunnel portal of the rail transit tunnel is realized, and the drainage effect and the drainage efficiency are improved; the flow speed of water flow when the rainwater is large is effectively relieved, and the water flow is prevented from further entering the tunnel; simple structure is reasonable, and construction convenience just is convenient for later maintenance.

Drawings

FIG. 1 is a plan view of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a sectional view taken along line B-B of fig. 1.

Detailed Description

The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:

as shown in fig. 1-3, the symbols 1-11 in the figures are respectively expressed as: the system comprises a steel rail system 1, a track bed 2, a track bed ditch 3, backfill concrete 4, a pre-buried drain pipe 5, a sump 6, a water retaining bank 7, a track bed transverse ditch 8, a rainwater grate 9, a mid-partition wall 10 and a rainwater pump house 11.

Example (b): the rail transit tunnel entrance to a cave department drainage system sets up in tunnel entrance to a cave position in this embodiment for realize the drainage of tunnel entrance to a cave department. As shown in fig. 1, two rail transit lines are arranged in the tunnel, each line comprises a track bed 2, a steel rail system 1 is arranged on each track bed 2, each steel rail system 1 comprises a conventional steel rail, fasteners and sleepers, the sleepers are erected on the track beds 2, and the fasteners fix the steel rails on the sleepers. An intermediate wall 10 is arranged between the two rail transit lines, and the intermediate wall 10 separates the two rail transit lines.

As shown in fig. 1 to 3, the drainage system at the tunnel entrance of the rail transit tunnel in the embodiment includes bed ditches 3 extending inward from the tunnel entrance along the line direction, the bed ditches 3 are provided with four channels, and the four bed ditches 3 correspond to two rail transit lines respectively. A rainwater pump room 11 is arranged on one side of the track bed 2, and water collecting pits 6 are respectively arranged on two sides of the track bed 2 corresponding to the transverse positions of the rainwater pump rooms 11. The sump 6 is provided on both sides of the track bed 2 without affecting the track bed structure. Each sump 6 is connected and communicated with a ballast bed ditch 3. The water collecting pits 6 are communicated through the embedded drain pipes 5, and one ends of the embedded drain pipes 5 are communicated with the rainwater pump room 11; as shown in fig. 2, the buried drain pipes 5 are arranged through the intermediate wall 10. As shown by the arrow direction in fig. 1, the rainwater at the tunnel portal can flow into the ballast bed ditch 3, and is collected into the water collection pit 6 and then enters the rainwater pump room 11 through the pre-buried drain pipe 5, so that the drainage at the tunnel portal is realized.

As shown in fig. 1, in order to improve the drainage effect and the drainage efficiency, the ballast bed ditch 3 may be provided with a directional downward slope inward from the tunnel opening in the direction of the line to ensure that the flow of rainwater can flow into the sump 6 quickly. Similarly, the pre-buried drain pipe 5 for leading the rainwater in the sump 6 into the rainwater pump room 11 also has a directional downward slope toward the rainwater pump room 11 side, thereby further improving the drainage effect and the drainage efficiency.

As shown in fig. 1 and 3, the water retaining sills 7 are arranged in the ballast ditch 3 at intervals, the water retaining sills 7 far away from the rainwater pump house 11 can adopt water retaining sills with lower height such as 50mm, and the water retaining sills near the rainwater pump house 11 can adopt water retaining sills with higher height such as 100 mm; thereby carry out the transition step by step of rainwater in tunnel entrance to the direction in the tunnel, realize manger plate step by step, reduce the velocity of flow, especially slow down the rivers when the rainwater is great, avoid rivers to spill over and get into in the tunnel.

As shown in fig. 1, a ballast bed transverse ditch 8 is arranged between two ballast bed ditches 3 at the tunnel portal of one track traffic line at intervals, and the ballast bed transverse ditches 8 communicate the two ballast bed ditches 3 so as to discharge rainwater scattered on a ballast bed surface in heavy rain into the ballast bed ditches 3 at two sides and prevent the scattered rainwater from entering a tunnel through the ballast bed surface. The depth of the transverse water ditch 8 of the track bed is not lower than that of the track bed water ditches 3 on the two sides, so that the drainage effect is ensured. Meanwhile, the ballast bed below the transverse water channel 8 of the ballast bed is not disconnected, and the bottom steel bars of the ballast bed are communicated, so that the adverse effect on the ballast bed structure is avoided.

As shown in fig. 1, the water collection pit 6 is separated from a drainage ditch of a line for draining water inwards into the tunnel by a certain distance, generally more than 1 meter, so as to prevent rainwater from entering the tunnel. The top of the water collecting pit 6 is flush with the bottom of the line drainage ditch, and the bottom of the water collecting pit 6 is flush with the top of the structural bottom plate.

As shown in fig. 1, each of the water collecting pits 6 is provided with a rain strainer 9, and the rain strainer 9 is provided with a grid, so that the blockage of a drainage channel caused by the dropping of impurities and the like into the water collecting pit 6 can be avoided.

In the embodiment, in specific implementation: as shown in fig. 1, the sump 6 may be formed by placing backfill concrete 4 in the tunnel area on both sides of the track bed 2 to form the sump 6 with a shape and size that meets the drainage requirements.

The quantity and the size of pre-buried drain pipe 5 can be specifically selected according to the requirement of displacement, and when the displacement demand is big, its drainage ability can be improved to the accessible increase pre-buried drain pipe 5's quantity or enlarge single pre-buried drain pipe 5's pipe diameter.

Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, they are not to be considered repeated herein.

Claims

1. The utility model provides a track traffic tunnel entrance to a cave department drainage system which characterized in that: this drainage system includes railway roadbed escape canal, sump pit, pre-buried drain pipe and rainwater pump house, and wherein railway roadbed escape canal extends to the tunnel from the tunnel entrance to the tunnel along the line direction, the sump pit sets up rainwater pump house one side just is located the railway roadbed both sides, the sump pit with the railway roadbed escape canal is connected and constitutes the intercommunication, the sump pit with the rainwater pump house passes through pre-buried drain pipe is connected and constitutes the intercommunication.

2. The rail transit tunnel portal drainage system of claim 1, wherein: the two sides of two lines in the tunnel are respectively provided with the water collecting pits, and the water collecting pits are communicated through the embedded drain pipes; the water collecting pits are respectively and independently connected with the track bed drainage ditches.

3. The rail transit tunnel portal drainage system of claim 2, wherein: be provided with the horizontal ditch of railway roadbed between the railway roadbed escape canal, the horizontal ditch of railway roadbed follows the extending direction interval arrangement of railway roadbed escape canal.

4. The rail transit tunnel portal drainage system of claim 3, wherein: the depth of the transverse ditch of the track bed is not less than that of the drainage ditch of the track bed.

5. The rail transit tunnel portal drainage system of claim 1, wherein: the ballast bed drainage ditch is provided with a directional downward gradient from the tunnel portal to the inside of the tunnel along the line direction; the pre-buried drain pipe has a directional downward gradient towards the direction of the rainwater pump room.

6. The rail transit tunnel portal drainage system of claim 1, wherein: a plurality of water retaining ridges are arranged in the track bed drainage ditch at intervals.

7. The rail transit tunnel portal drainage system of claim 6, wherein: and the heights of the water retaining ridges are gradually increased from the tunnel portal to the inside of the tunnel along the line direction.

8. The rail transit tunnel portal drainage system of claim 1, wherein: the water collecting pit is arranged in a way of being disconnected with a drainage ditch towards the drainage direction in the tunnel.

9. The rail transit tunnel portal drainage system of claim 1, wherein: and a rainwater grate is arranged above the water collecting pit.