CN216841801U - A shaft drainage system - Google Patents

Abstract

The utility model relates to the technical field of mountain tunnel construction of underground engineering, in particular to a shaft drainage system, which comprises a water collecting and drainage component, a primary support, a waterproof board, a secondary lining and a water collecting pool; preliminary bracing, waterproof board and secondary lining are the loop configuration, and set gradually by outer to interior, the drainage subassembly that catchments sets up between waterproof board and secondary lining, the drainage subassembly that catchments includes vertical drainage blind pipe, hoop drainage blind pipe and drainage pipe, hoop drainage blind pipe slope sets up, the hoop drainage blind pipe is provided with a plurality ofly along vertical direction side by side, the vertical setting of vertical drainage blind pipe, a plurality of hoop drainage blind pipes pass through vertical drainage blind pipe intercommunication, the bottom intercommunication of the hoop drainage blind pipe of drainage pipe one end and slope, the drainage pipe other end and catch basin intercommunication. The utility model discloses in being applicable to the shaft with common and effectual drainage system in the tunnel after reforming transform, solved the problem of groundwater seepage in the shaft better.

Description

A shaft drainage system

technical field

The utility model relates to the technical field of underground engineering mountain tunnel construction, in particular to a vertical shaft drainage system.

Background technique

In the construction of modern transportation infrastructure, with the continuous advancement of railway network construction in the western mountainous areas, various long tunnel projects in difficult and dangerous mountainous areas are constantly emerging. In the construction of Changchangshanling Tunnel, shafts, inclined shafts, horizontal tunnels, and flat guides are used as auxiliary tunnel means, which can increase the working surface, solve problems such as ventilation, transportation, and slag discharge, and improve the efficiency of tunnel construction. Construction occupies a considerable proportion.

Generally speaking, the construction of inclined shafts, horizontal tunnels, parallel pilot pits, etc. is relatively easy, but in the construction of tunnels with unsatisfactory geological conditions and large burial, the above three auxiliary means are difficult to set up, and the effect of improving construction efficiency is not obvious. Direct placement of shafts in the middle of the tunnel is often a necessary option. When the shaft passes through the stratum with complex geological conditions and rich groundwater system, a sudden surge accident is very likely to occur, threatening the construction safety. At present, in the construction of shafts, groundwater is generally detected and treated first before construction. The treatment methods are generally grouting and plugging the water outlet fissures and weak rock masses behind the shaft wall; pumping and draining groundwater; or groundwater freeze. However, due to the development of fissures and the poor regularity of groundwater distribution, there are blind spots in the first treatment methods such as grouting after the shaft wall, and the investment and construction risks of direct pumping and drainage methods are uncontrollable.

Chinese Patent Application No. CN201210561693.2 discloses a method for pre-grouting and water blocking of permeable layers in vertical shafts, including reserving a complete water-proof rock layer, treatment of wellbore spraying water, masonry water filter layer, installation of water collecting well and waterproof layer , Install and fix the grouting guide pipe, pour the concrete grouting stop pad, grouting the water filter layer, form the grouting hole and lay the grouting guide pipe for grouting; it can be effectively used in the pre-grouting of the permeable layer in the shaft to block water. .

However, the above scheme adopts grouting and water blocking method to pretreat the shaft, which cannot fully ensure that all areas in the shaft can be effectively grouted, and there is a grouting blind area. In this case, groundwater will penetrate into the shaft from the grouting blind area. However, the above solution cannot solve the problem of groundwater leakage in the shaft.

Utility model content

The purpose of the utility model is to solve the problems existing in the background technology, and propose a shaft drainage system, which includes a water collecting and drainage assembly, an initial support, a waterproof board, a secondary lining and a water collecting tank; the initial support, the waterproof board and the secondary lining They are all annular structures and are arranged in sequence from the outside to the inside. The water collection and drainage components are arranged between the waterproof board and the secondary lining. The water collection and drainage components include vertical drainage blind pipes, annular drainage blind pipes and drainage pipes. The oblique drainage blind pipes are arranged, the annular drainage blind pipes are arranged side by side in the vertical direction, and the vertical drainage blind pipes are arranged vertically. The two annular drainage blind pipes are connected through the vertical drainage blind pipes, one end of the drainage pipes is connected with the bottom end of the inclined annular drainage blind pipes, and the other end of the drainage pipes is connected with the sump.

Preferably, the included angle between the central axis of the annular drainage dead pipe and the vertical direction is 20°.

Preferably, both the vertical drainage blind pipe and the annular drainage blind pipe are made of fiber materials, and the outside of the vertical drainage blind pipe and the annular drainage blind pipe is wrapped with geotextile material.

Preferably, the waterproof board is made of polyethylene material.

Compared with the prior art, the utility model has the following beneficial technical effects:

Compared with the previous method of pre-processing the seepage water in the vertical shaft, the utility model transforms the water-proof and drainage system which is commonly used in the tunnel and has a good effect and is suitable for the vertical shaft, which better solves the problem of groundwater leakage in the vertical shaft.

Description of drawings

Fig. 1 is the front sectional view of the utility model embodiment;

Fig. 2 is the sectional view of the utility model embodiment;

Figure 3 is a diagram showing the positional relationship between the annular drainage dead pipe and the vertical shaft;

Figure 4 is a diagram showing the positional relationship between the drainage pipe and the sump;

Figure 5 is a detailed structural diagram of the drain blind pipe.

Reference numerals: 1. Vertical drainage blind pipe; 2. Circumferential drainage blind pipe; 3. Drainage pipe; 4. Initial support; 5. Waterproof board; 6. Secondary lining; Materials; 9. Geotextile materials.

Detailed ways

As shown in Figures 1-5, a shaft drainage system proposed by the present utility model includes a water collection and drainage assembly, an initial support 4, a waterproof plate 5, a secondary lining 6 and a water collecting tank 7; the initial support 4, the waterproof plate 5 and the secondary lining 6 are both annular structures, and are arranged in sequence from the outside to the inside. Drainage blind pipes 2 and 3, annular drainage blind pipes 2 are arranged obliquely, multiple annular drainage blind pipes 2 are arranged side by side in the vertical direction, vertical drainage blind pipes 1 are arranged vertically, and vertical drainage blind pipes 2 are arranged vertically. 1. A plurality of annular drainage blind pipes 2 are evenly arranged on the secondary lining 6. A plurality of annular drainage blind pipes 2 are communicated with the vertical drainage blind pipes 1. One end of the drainage pipes 3 is communicated with the bottom end of the inclined annular drainage blind pipes 2. The other end of the drainage pipe 3 is communicated with a water collecting tank 7 for receiving the groundwater flowing out of the drainage pipe 3 .

Preferably, the included angle between the central axis of the annular drainage blind pipe 2 and the vertical direction is 20°, and the groundwater infiltrated into the annular drainage blind pipe 2 can slide down smoothly into the drainage pipe 3 .

Preferably, both the vertical drainage blind pipe 1 and the annular drainage blind pipe 2 are made of fiber material 8 , and the outside of the vertical drainage blind pipe 1 and the annular drainage blind pipe 2 is wrapped with a geotextile material 9 .

Preferably, the waterproof plate 5 is made of polyethylene material.

In the specific implementation, the initial support 4 of the shaft is first applied, and then the waterproof board 5 is laid along the initial support 4. When the secondary lining 6 is applied, each time a section is applied, the waterproof board 5 is firstly attached to the inclined setting. Circumferential drainage blind pipe 2, and then arrange vertical drainage blind pipe 1 evenly along the circumferential direction, connect the vertical drainage blind pipe 1 with the annular drainage blind pipe 2, and finally set the vertical drainage blind pipe 2 at the lowest position The drainage pipe 3 is connected with the annular drainage blind pipe 2, and the secondary lining 6 is poured to wrap the entire drainage pipe. Finally, a sump 7 is set at the bottom of the shaft. When the shaft waterproof and drainage system is working, firstly, the waterproof plate 5 behind the initial support 4 blocks part of the seepage, and the groundwater seeping out from the waterproof plate 5 is collected by the water collection and drainage components, and the groundwater is filtered by the geotextile material 9 and enters the vertical direction. In the drainage dead pipe 1 and the annular drainage dead pipe 2, the water in each vertical drainage dead pipe 1 first flows into the annular drainage dead pipe 2. Since the annular drainage dead pipe 2 is inclined, the annular drainage dead pipe 2 The water in the water will be collected into the drainage pipe 3, and finally all the groundwater that leaks will be discharged to the sump 7 at the bottom of the shaft through the drainage pipe 3. Compared with the previous method of pre-treatment of seepage water in vertical shafts, this design applies the well-used anti-drainage system in tunnels to the shafts after transformation, so as to better reduce the problem of groundwater leakage in the shafts.

The embodiments of the present utility model are described in detail above in conjunction with the accompanying drawings, but the present utility model is not limited thereto, within the scope of knowledge possessed by those skilled in the art, without departing from the purpose of the present utility model. make various changes.

Claims (4)

1. A shaft drainage system, characterized in that it comprises a water collection and drainage assembly, an initial support (4), a waterproof board (5), a secondary lining (6) and a water collection tank (7); The initial support (4), the waterproof plate (5) and the secondary lining (6) are all annular structures and are arranged in sequence from the outside to the inside, and the water collection and drainage components are arranged on the waterproof plate (5) and the secondary lining (6). ), the water collection and drainage assembly includes a vertical drainage dead pipe (1), a circumferential drainage dead pipe (2) and a drainage pipe (3). 2) A plurality of vertical drainage dead pipes (1) are arranged side by side in the vertical direction, and a plurality of vertical drainage dead pipes (1) are evenly arranged in a ring shape on the secondary lining (6). The annular drainage dead pipe (2) is communicated with the vertical drainage dead pipe (1), one end of the drainage pipe (3) is communicated with the bottom end of the inclined annular drainage dead pipe (2), and the other end of the drainage pipe (3) is connected to the collector. The pool (7) is connected. 2 . The vertical shaft drainage system according to claim 1 , wherein the angle between the central axis of the annular drainage dead pipe ( 2 ) and the vertical direction is 20°. 3 . 3. A shaft drainage system according to claim 1, wherein the vertical drainage blind pipe (1) and the annular drainage blind pipe (2) are made of fiber material (8), and the vertical drainage blind pipe (2) is made of fiber material (8). The outside of the pipe (1) and the annular drainage blind pipe (2) is wrapped with a geotextile material (9). 4. A shaft drainage system according to claim 1, characterized in that, the waterproof plate (5) is made of polyethylene material.

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