CN212927943U

CN212927943U - Reverse slope drainage system in open cut tunnel construction process

Info

Publication number: CN212927943U
Application number: CN202021784000.2U
Authority: CN
Inventors: 赵凡
Original assignee: First Engineering Co Ltd of China Railway No 12 Bureau Group Co Ltd
Current assignee: First Engineering Co Ltd of China Railway No 12 Bureau Group Co Ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-04-09
Anticipated expiration: 2030-08-24

Abstract

The utility model belongs to the technical field of tunnel construction, concretely relates to openly cut adverse slope drainage system in tunnel work progress, the problem of the unnecessary water yield of unable effective discharge working face in the current openly cut tunnel work progress has been solved, including excavation end cistern and a plurality of interlude cistern that are located near tunnel excavation face, excavation end cistern, the same and inside suction pump and the electronic level gauge of all being provided with of specification of interlude cistern, the electronic level gauge passes through the data line, the suction pump is connected with the PLC control box respectively through the control line, excavation end cistern is provided with the end drain pipe towards one side of tunnel excavation face, along with the propulsion of tunnel excavation face, constantly be provided with new excavation end cistern, original excavation end cistern changes the interlude cistern into in proper order. The utility model discloses can effectively stop the condition such as pump burning or rivers excessive that probably take place in the drainage work of adverse slope, have higher spreading value.

Description

Reverse slope drainage system in open cut tunnel construction process

Technical Field

The utility model belongs to the technical field of the tunnel construction, concretely relates to anti-slope drainage system in open cut tunnel work progress.

Background

When the tunnel is designed to be a reverse slope, reverse slope construction is required according to design requirements. The direction of the reverse slope construction, namely the direction of the reverse slope construction, which is propelled into the tunnel, is a downhill, and because the mountain body forming the tunnel is provided with a certain amount of water and the same construction water needed in the operation process, the redundant water can be continuously collected towards the working surface and needs to be pumped and drained in time, so that the situation that the water accumulation on the construction face is too deep, the stability of tunnel surrounding rocks is influenced, and even the safety of mechanical equipment and constructors in the tunnel construction is endangered is avoided.

At present, the mainstream method is to dig a groove on site and directly drain the redundant water on the working surface to the outside of the hole through a water pump. When in construction, the water pump is synchronously started to pump water, the requirement can be met only when the water quantity is moderate, and the water pump is easily burnt when the water quantity is less; in addition, because the continuous propulsion in tunnel, single level's water pump can't satisfy the demand of drawing water, leads to the hole internal environment confusion easily.

Disclosure of Invention

The utility model discloses a solve the problem of the unnecessary water yield of unable effective discharge working face in the current open cut tunnel work progress, provide a reverse slope drainage system in the open cut tunnel work progress.

The utility model discloses a realize through following technical scheme: a reverse slope drainage system in open cut tunnel construction process comprises a plurality of reservoirs arranged in a tunnel, wherein the reservoirs are arranged at equal intervals along the edge of the tunnel according to the excavation length of the tunnel, each reservoir comprises an excavation end reservoir and a plurality of middle section reservoirs, the excavation end reservoirs and the middle section reservoirs are the same in specification and are internally provided with a water suction pump and an electronic liquid level meter, the electronic liquid level meters are connected with a PLC control box through data lines and control lines respectively, the water suction pumps are connected with drainage pipelines, the other ends of the drainage pipelines are sequentially arranged in adjacent middle section reservoirs far away from the tunnel excavation surface direction, one side of the excavation end reservoir, which faces the tunnel excavation surface, is provided with an end drainage pipe, with the propulsion of the tunnel excavation surface, new excavation end reservoirs are continuously arranged, the original excavation end reservoirs are sequentially converted into the middle sections, and simultaneously removing the end water discharge pipe connected with the excavation end reservoir and arranging a new end water discharge pipe at the new excavation end reservoir.

Further, the end drain pipe is seamless steel pipe, and the end drain pipe is provided with and deviates from the downward slope of tunnel excavation face slope, and the slope value is 5 ~ 10.

Furthermore, the data lines and the control lines are arranged close to the edge of the tunnel to prevent the influence on the normal traffic of the road construction vehicles.

Further, the water pump is a sewage pump. Specifically, any one of a submersible sewage pump and a vertical sewage pump may be used.

Compared with the prior art, the utility model has the advantages that:

the utility model has reasonable structural design, realizes graded drainage through the excavation end reservoir and the plurality of middle section reservoirs which are arranged near the tunnel excavation surface, and ensures the effective lift of the water pump; meanwhile, an electronic liquid level meter and a water suction pump are introduced into the water storage tank and connected with the PLC, so that the PLC controls the water suction pumps, and the condition of pump burning or water flow overflow possibly occurring in the reverse slope drainage work is avoided.

Drawings

Fig. 1 is a schematic diagram of the system structure of the present invention;

fig. 2 is a schematic structural diagram of the front end reservoir excavated in fig. 1;

fig. 3 is a schematic of the mid-section water reservoir of fig. 1.

In the figure: the method comprises the following steps of 1-tunnel excavation face, 2-middle section reservoir, 2.1-excavation end reservoir, 3-water pump, 4-electronic liquid level meter, 5-drainage pipeline, 6-data line, 7-end drainage pipe, 8-PLC control box and 9-control line.

Detailed Description

The utility model is further explained by referring to fig. 1-3, a counter-slope drainage system in open cut tunnel construction process, which comprises a plurality of reservoirs arranged in the tunnel, the reservoirs are arranged at equal intervals along the edge of the tunnel according to the tunnel excavation length, the reservoirs comprise an excavation end reservoir 2.1 and a plurality of middle section reservoirs 2 which are arranged near the tunnel excavation surface 1, the excavation end reservoir 2.1 and the middle section reservoirs 2 have the same specification and are internally provided with a water suction pump 3 and an electronic liquid level meter 4, the electronic liquid level meter 4 is respectively connected with a PLC control box 8 through a data line 6 and a water suction pump 3 through a control line 9, the water suction pump 3 is connected with a drainage pipeline 5, the other end of the drainage pipeline 5 is sequentially arranged in the middle section reservoirs 2 which are adjacent in the direction far away from the tunnel excavation surface 1, one side of the excavation end 2.1 towards the tunnel excavation surface 1 is provided with a drainage pipe, with the propulsion of tunnel excavation face 1, constantly be provided with new excavation end cistern 2.1, original excavation end cistern 2.1 changes into interlude cistern 2 in proper order, removes the end drain pipe 7 of being connected with excavation end cistern 2.1 simultaneously and sets up new end drain pipe 7 in new excavation end cistern 2.1 department.

The following embodiment is combined, the utility model discloses the process of carrying out tunnel adverse slope drainage is as follows:

as shown in fig. 1, the direction of the arrow is a drainage direction, which is opposite to the excavation direction of the tunnel. Firstly, the open cut tunnel is excavated, and simple drainage can be performed by means of the ditch in the excavation process. When the excavation depth reaches 100 meters, a first excavation end reservoir 2.1 can be arranged, the excavation end reservoir 2.1 is of a rectangular structure, and a grate or a well cover is arranged at the upper part of the excavation end reservoir; utilize an end drain pipe 7 of pipe jacking technique construction from excavation end cistern 2.1 inside towards one side of tunnel excavation face 1, end drain pipe 7 adopts seamless steel pipe, and end drain pipe 7 orientation deviates from tunnel excavation face 1 and is provided with 5% slope, and suction pump 3 in the last cistern is connected with water drainage pipe 5, and water drainage pipe 5 at this place links to each other with the outer rain sewage well in tunnel.

When the tunnel excavation surface 1 is accumulated with water, the water enters an excavation end reservoir 2.1 through an end drain pipe 7, an electronic liquid level meter 4 and a water suction pump 3 are arranged in the excavation end reservoir 2.1, the electronic liquid level meter 4 is connected with a PLC control box 8 through a data line 6, when the liquid level rises to a certain value, the electronic liquid level meter 4 transmits a signal to the PLC control box 8, and the PLC controls the water suction pump 3 to work through a control line 9 to pump water; when the water level in the excavation end reservoir 2.1 is lower than a set value, the electronic liquid level meter 4 can transmit signals to the PLC control box 8, and then the PLC controls the water suction pump 3 to stop working.

Further, the tunnel excavation surface 1 continues to be pushed, when the tunnel excavation surface is pushed to 300 meters, the steps are repeated, and new excavation end reservoir 2.1 construction is carried out. At the same time, the end drain 7 in the original excavation end reservoir 2.1 is removed and a middle section reservoir 2 is formed. At the moment, a water suction pump 3 and an electronic liquid level meter 4 which are connected with a PLC control box 8 are arranged in the excavation end reservoir 2.1 and the middle section reservoir 2. Whether the water pump 3 in each reservoir works depends on whether the liquid level height in the reservoir reaches a preset value or not, so that water is orderly discharged from the excavation end reservoir 2.1 after sequentially passing through the middle section reservoir 2 adjacent to the excavation end reservoir.

In order to ensure the safety of operators, all lines are not allowed to be arranged in a dragging mode, and grates are arranged on the upper portions of the excavation end reservoir 2.1 and the middle section reservoir 2.

The utility model discloses can effectively stop the condition such as pump burning or rivers excessive that probably take place in the drainage work of adverse slope, have higher spreading value.

Claims

1. The utility model provides a reverse slope drainage system in open cut tunnel work progress which characterized in that: the tunnel excavation water level meter comprises a plurality of water reservoirs arranged in a tunnel, the water reservoirs are arranged at equal intervals along the edge of the tunnel according to the tunnel excavation length, each water reservoir comprises an excavation end water reservoir (2.1) and a plurality of middle section water reservoirs (2) which are positioned near a tunnel excavation surface (1), the excavation end water reservoirs (2.1), the middle section water reservoirs (2) are the same in specification and are internally provided with a water suction pump (3) and an electronic liquid level meter (4), the electronic liquid level meter (4) is connected with a PLC control box (8) through a data line (6) and the water suction pump (3) is respectively connected with a PLC control box (8) through a control line (9), the water suction pump (3) is connected with a water drainage pipeline (5), the other end of the water drainage pipeline (5) is sequentially arranged in the middle section water reservoir (2) which is adjacent to the direction far away from the tunnel excavation surface (1, with the propulsion of tunnel excavation face (1), constantly be provided with new excavation end cistern (2.1), original excavation end cistern (2.1) changes into interlude cistern (2) in proper order, removes end drain pipe (7) of being connected with excavation end cistern (2.1) simultaneously and sets up new end drain pipe (7) in new excavation end cistern (2.1) department.

2. The reverse slope drainage system in the open trench tunnel construction process according to claim 1, wherein: the end drain pipe (7) is seamless steel pipe, and the end drain pipe (7) are provided with and deviate from the downward slope of tunnel excavation face (1) slope, and the gradient value is 5 ~ 10.

3. The reverse slope drainage system in the open trench tunnel construction process according to claim 1, wherein: the data lines (6) and the control lines (9) are arranged close to the edges of the tunnel.

4. The reverse slope drainage system in the open trench tunnel construction process according to claim 1, wherein: the water pump (3) is a sewage pump.