CN212508353U

CN212508353U - Tunnel lining infiltration removes dangerous drainage structures that consolidates

Info

Publication number: CN212508353U
Application number: CN202020892301.0U
Authority: CN
Inventors: 王瑞
Original assignee: China Hydropower Consulting Group Guiyang Survey And Design Institute Of Geotechnical Engineering Co ltd; PowerChina Guiyang Engineering Corp Ltd
Current assignee: China Hydropower Consulting Group Guiyang Survey And Design Institute Of Geotechnical Engineering Co ltd; PowerChina Guiyang Engineering Corp Ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-02-09
Anticipated expiration: 2030-05-25

Abstract

The utility model discloses a tunnel lining infiltration removes dangerous reinforcement drainage structures, including former lining cutting and new lining cutting, set up crack seepage drainage structures between former lining cutting and new lining cutting to concentrate the infiltration point at former lining cutting and set up the drain pipe, the infiltration of former lining cutting is unified to be collected to the tunnel drainage ditch in through drain pipe and crack seepage drainage structures. Adopt this drainage structures, can directly lay drainage facility on former lining cutting, avoid the grooving to bury drainage facility underground and produce adverse effect to former lining cutting structure, the blind material of drainage adopts geotechnological cloth parcel by former lining cutting side, adopt the geomembrane parcel by new lining cutting side, guarantee that the infiltration can freely permeate the blind material of drainage, the thick liquid can not cause the blind material of drainage to block up in permeating the blind material of drainage when new lining cutting concrete placement, and simultaneously, the department sets up the drain pipe at concentrated infiltration point, directly draw the row to the escape canal in the new lining cutting outside, avoid concentrating the destruction of infiltration point to structure.

Description

Tunnel lining infiltration removes dangerous drainage structures that consolidates

Technical Field

The utility model belongs to the technical field of hydraulic and hydroelectric engineering, be applicable to dam crest cable pit and dam crest escape canal design and construction among the hydraulic and hydroelectric engineering.

Background

In recent years, with the rapid increase of national economy, the traffic infrastructure of China is rapidly developed, and tunnel engineering becomes an indispensable part in the construction of basic engineering such as highways, high-speed railways, subways and the like. Through rationally setting up the tunnel, can cut the route and bend and get straight, cross the mountain and cross, reduce the route mileage greatly, make things convenient for people's trip and transportation. The construction of tunnel engineering achieves remarkable results, and meanwhile, problems are inevitably faced, wherein the most prominent problem is the groundwater seepage problem. The influence of underground water is not fully considered in early construction of some tunnels, particularly when the tunnels are constructed in rock erosion crack type leakage places, the tunnel drainage structure is unreasonable in design, and drainage facilities are not targeted in arrangement, so that the obvious leakage problem of tunnel lining is often caused, and the safety of the tunnel structure is endangered; in the later operation of some tunnels, the tunnel is influenced by adverse conditions such as geological conditions, driving factors and the like, the structure of the original tunnel lining drainage facility is aged and is repaired for a long time, the drainage facility is blocked, and further the phenomenon of water seepage and cracking of the tunnel lining is caused, and the danger removal and reinforcement treatment is needed.

For the tunnel with a serious condition, when the danger removing reinforcement treatment is carried out on the tunnel, the construction of reinforcing the lining can be carried out only after the problem of water seepage of the original lining is properly solved, otherwise, the water seepage of the original lining longitudinal and transverse cracks and the concentrated water seepage points of the tunnel can infiltrate into newly poured concrete to form a new seepage channel, and the durability of the reinforcing lining and the safety of the structure are influenced. At present, when the tunnel is subjected to danger removing and reinforcing treatment in engineering, lining seepage water is drained in a mode of burying a drainage pipe, a single drainage pipe is only effective for concentrated seepage points, and the single drainage pipe is not suitable for crack seepage; some projects are treated by adopting a mode of embedding drainage blind materials in grooves, the grooves are carved on the original lining, the construction is relatively complex, the disturbance is generated on the original lining, the structural reinforcing steel bars of the lining are damaged, the safety of the original lining structure is seriously or even endangered, and the drainage blind materials are easily blocked by calcified crystalline substances and concrete slurry. Therefore, a lining water seepage and drainage structure which is more reasonable and convenient to construct is needed to solve the water seepage problem during danger removal and reinforcement of the tunnel lining.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tunnel lining infiltration removes dangerous drainage structures that consolidates to the not enough of prior art existence.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a tunnel lining water seepage danger removing and reinforcing drainage structure comprises an original lining and a new lining, a crack seepage drainage structure is arranged between the original lining and the new lining, a drainage pipe is arranged at a concentrated seepage point of the original lining, and seepage water of the original lining is collected into a tunnel drainage ditch through the drainage pipe and the crack seepage drainage structure in a unified mode.

Furthermore, drainage blind materials are laid at the longitudinal and transverse seepage crack positions of the original lining, the drainage blind materials are wrapped by geotextile at the side close to the original lining, and are wrapped by geomembranes at the side close to the new lining.

Furthermore, a drainage blind material is arranged at the concentrated water seepage point, the outer side of the drainage blind material is wrapped by a geomembrane, and a drainage pipe extends into the drainage blind material at the concentrated water seepage point and is fixed on the outer side wall of the new lining.

Furthermore, the geomembrane wrapping the drainage blind material at the leakage crack and the concentrated seepage point is fixed by adopting expansion bolts.

Compared with the prior art, the utility model has the advantages that the original lining crack type seepage and the concentrated seepage points are treated in a targeted manner, the original lining seepage is effectively drained, and the adverse effect of the original lining seepage on the pouring of a new lining is avoided; the construction step of grooving and embedding drainage blind materials in the original lining is cancelled, and drainage arrangement is directly laid on the original lining, so that the adverse effects of disturbance, damage to structural steel bars of the lining and the like on the original lining during grooving construction are avoided; moreover, the drainage blind material is laid at the leakage position of the original lining cracks, the drainage blind material is wrapped by geotextile on the original lining side and wrapped by geomembrane on the new lining side, so that seepage can freely penetrate into the drainage blind material, and slurry cannot penetrate into the drainage blind material to cause the blockage of the drainage blind material when new lining concrete is poured; additionally, the utility model discloses set up the drain pipe concentrating the infiltration point department, directly draw the row to the escape canal in the new lining cutting outside, avoid concentrating the destruction of infiltration point pair structure.

Adopt this drainage structures, can directly lay drainage facility on former lining cutting, avoid the grooving to bury drainage facility underground and produce adverse effect to former lining cutting structure, the blind material of drainage adopts geotechnological cloth parcel by former lining cutting side, adopt the geomembrane parcel by new lining cutting side, guarantee that the infiltration can freely permeate the blind material of drainage, the thick liquid can not cause the blind material of drainage to block up in permeating the blind material of drainage when new lining cutting concrete placement, and simultaneously, the department sets up the drain pipe at concentrated infiltration point, directly draw the row to the escape canal in the new lining cutting outside, avoid concentrating the destruction of infiltration point to structure.

Drawings

FIG. 1 is a typical sectional view of a lining reinforced water treatment drainage structure;

FIG. 2 is a sectional view of a crevice leak-off water treatment;

FIG. 3 is a sectional view of a water treatment of a concentrated water spot;

FIG. 4 is a large picture of a crevice leakage drainage configuration.

Description of reference numerals: 1-original lining; 2-new lining; 3-centralized water seepage point; 4-a fracture seepage drainage structure; 5, a drain pipe; 6-drainage ditch; 7-geotextile; 8-drainage blind materials; 9-geomembrane; 10-leak-off crevices; 11-expansion bolt.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1 to 4, the present invention is implemented as follows: for the tunnel with serious water seepage, danger-removing reinforcement treatment needs to be carried out on the tunnel. Before pouring a new lining 2 outside the original lining 1 for reinforcement, a crack leakage drainage structure 4 needs to be arranged at a leakage crack 10, a drain pipe 5 is arranged at a concentrated water seepage point 3 of the original lining 1, and the seepage water of the original lining 1 is uniformly collected into a tunnel drainage ditch 6 through the drain pipe 5 and the crack leakage drainage structure 4, so that the safety of the tunnel structure is ensured.

The method comprises the steps of carrying out detailed inspection on an original lining 1 of the tunnel danger-removing reinforcement section, identifying positions of concentrated water seepage points 3 and seepage cracks 10, reasonably arranging concentrated water seepage drainage pipes 5 and crack seepage drainage structures 4 according to corresponding positions, and effectively guiding and draining seepage water of the original lining 1.

Precipitates can be accumulated at the positions of the leakage cracks 10 of the original lining 1, so that the longitudinal and transverse crack leakage drainage structures 4 cannot be flatly and tightly attached to the surface of the original lining 1 when being laid, and a hollowing is formed. In order to ensure the drainage effect, the precipitate at the leakage position of the original lining 1 needs to be cleaned before the drainage structure 4 is constructed, and the cleaning range is 10cm from two sides of the leakage crack.

After the precipitate is cleaned, the drainage blind material 8 is laid at the position of the longitudinal and transverse seepage crack 10 of the original lining 1, the drainage blind material 8 is wrapped by the geotextile 7 at the side close to the original lining 1, the seepage of the crack can be fully gathered by utilizing the functions of the geotextile 7 such as water permeability, filtration and isolation, and meanwhile, fine particles can be prevented from entering the drainage blind material 8 to form blockage; by adopting the geomembrane 9 to wrap the side of the new lining 2, the seepage water can be prevented from permeating into the concrete of the new lining 2, and concrete slurry and fine particles can be prevented from entering the drainage blind material 8 to cause the blockage of a drainage channel when the concrete is poured.

Arranging a drainage blind material 8 at the centralized water seepage point 3, wrapping the drainage blind material by adopting a geomembrane 9, and extending a drainage pipe 5 into the drainage blind material 8 at the centralized water seepage point 3 and fixing the drainage blind material on the outer side wall of the new lining 2, so that the centralized water seepage is directly led into a drainage ditch 6 from the outer side of the new lining 2, and the concrete of the new lining 2 can be prevented from being damaged by the centralized water seepage and blocking the drainage pipe 5;

the seepage crack 10 and the geomembrane 9 of the concentrated seepage point 3 wrapping the drainage blind material 8 are fixed by adopting expansion bolts 11, so that the accurate installation positions of the drainage blind material 8 and the drainage pipe 5 are ensured, and the drainage facility is prevented from shifting when new lining 2 concrete is poured to cause the failure of the drainage facility.

Of course, the above is only the specific application example of the present invention, and the present invention has other embodiments, and all technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope claimed by the present invention.

Claims

1. The utility model provides a tunnel lining infiltration removes dangerous drainage structures of consolidating, includes former lining (1) and new lining (2), its characterized in that: set up crack seepage drainage structures (4) between former lining (1) and new lining (2) to concentrate infiltration point (3) at former lining (1) and set up drain pipe (5), the infiltration of former lining (1) is unified to be collected in tunnel escape canal (6) through drain pipe (5) and crack seepage drainage structures (4).

2. The tunnel lining seepage danger removing, reinforcing and draining structure of claim 1, wherein: and (3) laying drainage blind materials (8) at the longitudinal and transverse leakage crack (10) positions of the original lining (1), wherein the drainage blind materials (8) are wrapped by geotextile (7) at the side close to the original lining (1), and are wrapped by geomembrane (9) at the side close to the new lining (2).

3. The tunnel lining seepage danger removing, reinforcing and draining structure of claim 1, wherein: the drainage blind material (8) is arranged at the concentrated water seepage point (3), the outer side of the drainage blind material (8) is wrapped by a geomembrane (9), and the drainage pipe (5) extends into the drainage blind material (8) of the concentrated water seepage point (3) and is fixed on the outer side wall of the new lining (2).

4. The tunnel lining seepage danger removing, reinforcing and draining structure of claim 1, wherein: the geomembrane (9) which wraps the drainage blind material (8) at the seepage crack (10) and the concentrated seepage point (3) is fixed by adopting expansion bolts (11).