CN206655716U - A kind of tunnel drainage structure - Google Patents

Abstract

The utility model discloses a tunnel drainage structure, which belongs to the field of tunnel construction structures and is used to solve the problems of many and complicated construction procedures and poor drainage effect. It includes a reinforcement layer and a water-permeable layer. The reinforcement layer is located outside the construction section. The water-permeable layer includes a vault part and a vault bottom part. The vault part is poured on the inner wall of the reinforcement layer. On the bottom surface, a drainage pipe is pre-buried inside the arch bottom part along the extension direction of the tunnel; the drainage pipe includes a skeleton and a surface fabric, and the surface fabric is fixed on the outside of the skeleton. The technical scheme has simple and reasonable structure and good drainage effect.

Description

A tunnel drainage structure

technical field

The utility model belongs to the field of tunnel construction structures, in particular to a tunnel drainage structure.

Background technique

At present, the "grouting + drainage" method is a commonly used waterproof and drainage method in tunnels. After lining, the rock is reinforced by grouting to reduce the permeability coefficient of the rock and prevent more groundwater from flowing into the tunnel; a drainage system is installed between the primary lining and the second lining of the tunnel to drain the groundwater that flows into the tunnel through the rock and reduce the impact of groundwater on the second tunnel. The role of the lining is to ensure the safety of the tunnel structure.

The disadvantages of the "grouting + drainage" method are: many and complicated construction procedures, poor drainage effect, etc.

Utility model content

The purpose of the utility model is to provide a tunnel drainage structure with simple and reasonable structure and good drainage effect.

For realizing above-mentioned technical purpose, the technical scheme that the utility model adopts is as follows:

A tunnel drainage structure, comprising a reinforcement layer and a water-permeable layer, the reinforcement layer is located outside the construction section, the water-permeable layer includes a vault part and a vault bottom part, the vault part is poured on the inner wall of the reinforcement layer, and the vault bottom part Part of it is laid flat on the bottom of the tunnel, and a drainage pipe is pre-buried inside the arch bottom part along the extension direction of the tunnel; the drainage pipe includes a skeleton and a surface fabric, and the surface fabric is fixed on the outside of the skeleton.

It is further defined that the skeleton includes several arc-shaped ribs and longitudinal ribs, the arc-shaped ribs are one-half arcs, the several arc-shaped ribs are evenly arranged longitudinally, and the longitudinal ribs are at least provided with Three, the three longitudinal ribs are respectively fixedly connected to the two ends and the top of the arc-shaped ribs.

Further defined, the inner wall of the vault part is also provided with a waterproof layer, and the waterproof layer is composed of several waterproof board units welded to each other.

It is further defined that a reinforcement mesh is pre-embedded in the water-permeable layer.

Further defined, the thickness of the water-permeable layer is 20cm-30cm.

In the utility model adopting the above-mentioned technical scheme, the reinforcement layer is used as the overall structural support of the tunnel to improve the overall structural strength of the tunnel; the permeable layer can be poured with foam concrete, and the foam concrete itself has an internal porous structure, which is convenient for groundwater to penetrate, and the permeable layer It is composed of the vault part and the vault bottom part. The groundwater infiltrated by the vault part will permeate downward along the curved surface and finally collect in the vault bottom part. The drainage pipe composed of skeleton and surface fabric is pre-buried in the vault bottom part. The surface fabric is made of asbestos cloth or glass fiber cloth with good anti-corrosion effect, which is conducive to the penetration of groundwater. The interior of the drainage pipe is hollow, which can also facilitate the discharge of groundwater and improve the drainage effect; the skeleton is fixed by several arc ribs and longitudinal ribs It is composed of connections to form an arched channel with a curved surface upward, which is beneficial to disperse the pressure above, prevent the drainage pipe from being deformed under pressure during the construction process, and improve its structural strength; the inner wall of the vault is provided with a waterproof layer, and the waterproof layer is composed of several waterproof The board units are welded to each other, and the waterproof board unit can be made of PVC plastic board, which can be spliced together by hot melting; the reinforcement mesh is pre-embedded in the permeable layer to improve the structural strength of the permeable layer;

Above-mentioned technical scheme adopts following construction steps:

1. Pre-measurement:

Use the equipment to predetermine the section radius of the tunnel, and mark the position of the section radius;

Second, the reinforcement layer construction:

1. Drilling: Use drilling equipment to drill evenly at a distance of 20cm-30cm outside the marked tunnel radius;

2. Grouting: inject concrete slurry into the hole through the grouting equipment;

3. Curing: After the concrete slurry is poured, it will permeate along the underlying structure. During the infiltration process, the rocks and sand in the underlying structure will be bonded to form an arched reinforcement layer;

3. Tunnel excavation:

Use excavation machinery to carry out longitudinal excavation, and the excavation depth shall not exceed the depth of the reinforcement layer by 30cm; the construction radius shall not be greater than the inner wall of the reinforcement layer by 10cm;

3. Construction of permeable layer:

1. Implant the prefabricated reinforcement mesh into the inner wall of the reinforcement layer, nail expansion bolts into the inner wall of the reinforcement layer, and fix the reinforcement mesh on the expansion bolts;

2. To lay drainage pipes, lay several drainage pipes side by side with an interval of 20-25cm between them;

3. Inject the well-proportioned foam concrete into the arch bottom through the grouting equipment;

4. When the arch bottom part reaches 65%-70% of the strength required by the process, the arch top part is watered;

5. When the vault part reaches 80% of the process requirements, use acrylic waterproof paint to paint the inner wall of the vault part;

Fourth, waterproof layer construction:

Fix the PVC plastic board to the waterproof layer through expansion screws, and use hot-melt bonding between two adjacent PVC plastic boards.

Compared with the prior art, the utility model has simple and reasonable structure and good drainage effect.

Description of drawings

The utility model can be further illustrated by the non-limitative embodiments provided by the accompanying drawings;

Fig. 1 is the structural representation of a kind of tunnel drainage structure of the present utility model;

Figure 2 is a schematic diagram of the skeleton structure;

Fig. 3 is the sectional view of A-A among Fig. 1;

The main component symbols are explained as follows:

Reinforcement layer 1, permeable layer 2, vault part 3, vault bottom part 4, drainage pipe 5, skeleton 6, surface fabric 7, curved ribs 8, longitudinal ribs 9, waterproof layer 10, reinforcement mesh 11.

detailed description

In order to enable those skilled in the art to better understand the utility model, the technical solution of the utility model will be further described below in conjunction with the drawings and embodiments.

As shown in Figure 1, Figure 2, and Figure 3, a tunnel drainage structure includes a reinforcement layer 1 and a water-permeable layer 2. The top part 3 is poured on the inner wall of the reinforcement layer 1, the arch bottom part 4 is tiled on the bottom of the tunnel, and the interior of the arch bottom part 4 is embedded with a drainage pipe 5 along the extension direction of the tunnel; the drainage pipe 5 includes a skeleton 6, a surface fabric 7, and a surface fabric 7 It is fixed on the outside of the frame 6.

Preferably, the skeleton 6 includes several arc-shaped ribs 8 and longitudinal ribs 9, the arc-shaped ribs 8 are 1/2 arcs, several arc-shaped ribs 8 are arranged vertically and evenly, and there are at least three longitudinal ribs 9, The three longitudinal ribs 9 are respectively fixedly connected to the two ends and the top of the arc-shaped ribs 8 .

Preferably, the inner wall of the vault part 3 is also provided with a waterproof layer 10, and the waterproof layer 10 is composed of several waterproof board units welded to each other.

Preferably, the water-permeable layer 2 is also pre-embedded with a reinforcement mesh 11 .

Preferably, the water-permeable layer 2 is 20cm-30cm thick.

The tunnel drainage structure provided by the utility model has been introduced in detail above. The description of specific embodiments is only used to help understand the method and core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

Claims (5)

1. a kind of tunnel drainage structure, including back-up coat, pervious bed, it is characterised in that：The back-up coat is located at outside construction section, The pervious bed includes vault part, arch bottom point, and the vault part is poured in back-up coat inwall, the arch bottom point tiling In tunnel bottom surface, the arch bottom partial interior is embedded with drainage pipeline along tunnel bearing of trend；The drainage pipeline include skeleton, Surface layer fabric, the surface layer fabric are fixed on the outside of skeleton.

A kind of 2. tunnel drainage structure according to claim 1, it is characterised in that：The skeleton includes some arched ribs Bar, lengthways of rod, the arc rib are half circular arc, and some arc ribs are longitudinally evenly distributed, the longitudinal direction Rib is at least provided with three, and the both ends with arc rib, top are fixedly connected three lengthways of rod respectively.

A kind of 3. tunnel drainage structure according to claim 2, it is characterised in that：The vault internal partial wall is additionally provided with anti- Water layer, the waterproof layer are welded to each other by some waterproof Slab elements and formed.

A kind of 4. tunnel drainage structure according to claim 3, it is characterised in that：Reinforcement is also embedded with the pervious bed Muscle net.

A kind of 5. tunnel drainage structure according to claim 4, it is characterised in that：The permeable thickness 20cm-30cm.