CN217976240U

CN217976240U - Prefabricated assembled lining of mountain tunnel water drainage prevention

Info

Publication number: CN217976240U
Application number: CN202221294574.0U
Authority: CN
Inventors: 李睿骞
Original assignee: Survey And Design Institute Of China Railway 11th Bureau Group Co ltd; China Railway 11th Bureau Group Co Ltd
Current assignee: Survey And Design Institute Of China Railway 11th Bureau Group Co ltd; China Railway 11th Bureau Group Co Ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2022-12-06
Anticipated expiration: 2032-05-27

Abstract

The utility model provides a prefabricated assembled lining cutting of mountain tunnel water drainage prevention, including the lining cutting body, the lining cutting body includes the prefabricated assembled lining cutting of outer preliminary bracing and inlayer, it has geotechnological cloth layer to fill between the two, stagnant water zone layer and backfill slip casting layer behind one's back, the hoop construction joint department of assembling between preliminary bracing and the geotechnological cloth layer is equipped with convex shell type drain bar, seam department is equipped with the sealed pad of elastic rubber between the lining cutting piece, the bottom center of lining cutting body is equipped with central escape canal, the low wall is equipped with the drainage side ditch, it is equipped with vertical drainage blind pipe and outlet to lie in side wall foot department between preliminary bracing and the convex shell type drain bar, wherein the export of vertical drainage blind pipe and the slant drain pipe intercommunication of bending into the drainage side ditch, through central drain pipe intercommunication between drainage side ditch and the central escape canal. The utility model discloses use the tradition to prevent that drainage lining cutting structure is the basis, combine the characteristics in assembled tunnel to improve, can improve mountain tunnel prefabricated assembled lining cutting's waterproof and drainage effect by a wide margin.

Description

Prefabricated assembled lining of mountain tunnel water drainage prevention

Technical Field

The utility model relates to a tunnel design construction technical field especially relates to a prefabricated assembled lining cutting of mountain tunnel waterproof and drainage.

Background

Since the establishment of new China, various careers in China are developed, and especially in the last two decades, traffic infrastructure is unprecedentedly and greatly developed. Mountain tunnels in China have undergone the progress from traditional supporting structures to modern supporting structures and from integral lining to composite lining. The construction method of mountain tunnel is also developed from traditional mine method to new Austrian method and TBM construction method.

At present, the application of prefabricated technology for mountain tunnels built by a new Olympic method in China is relatively few. Traditional waterproof lining cutting structure is difficult to reach the ideal effect, easily leads to the percolating water, and the percolating water problem appears in the tunnel not only can weaken weak country rock on every side slightly, leads to touchdown nature country rock to be in the inflation state, leads to the fact the threat to tunnel structure safety, also can lead to the inside fog of tunnel to increase simultaneously, the bottom surface is too slippery, and visibility is low, has increased the potential safety hazard.

In some special environments, such as regions such as high and cold frozen soil and the like, the fabricated lining can effectively adapt to the environment under the condition that the molded concrete is difficult to implement, thereby not only ensuring the quality of the concrete, but also reducing corresponding auxiliary construction measures and improving the construction environment of the tunnel. Therefore, the waterproof and drainage structure based on the prefabricated assembled lining on the mountain ridge needs to be further researched and perfected.

Disclosure of Invention

In order to solve the not enough of prior art, the utility model provides a prefabricated assembled lining cutting of drainage is prevented in mountain tunnel to the drainage lining cutting structure is prevented to the tradition is based, combines the characteristics in assembled tunnel to improve, can improve mountain tunnel prefabricated assembled lining cutting's drainage effect of preventing by a wide margin.

The utility model discloses a solve the technical scheme that its technical problem adopted and be: the prefabricated lining comprises a lining body, wherein the lining body comprises an outer primary support and an inner prefabricated lining, short side walls are arranged at the bottoms of two sides of an inverted arch of the prefabricated lining, a geotextile layer, a water stop belt layer and a back backfill grouting layer are sequentially filled between the primary support and the prefabricated lining from outside to inside, a convex shell type drainage plate is arranged between the primary support and the geotextile layer at an assembly circumferential construction joint of the prefabricated lining, an elastic rubber sealing gasket is arranged at a joint between lining sheets of the prefabricated lining, a central drainage ditch extending along the longitudinal depth direction of a tunnel is arranged in the center of the bottom of the lining body, a drainage side ditch extending along the longitudinal depth direction of the tunnel is arranged on the short side walls, a longitudinal drainage blind pipe and a drainage hole are arranged between the primary support and the convex shell type waterproof plate at a side wall foot, an outlet of the longitudinal drainage blind pipe is communicated with an oblique drainage pipe bent into the drainage side ditch, and the drainage side ditch is communicated through the central drainage pipe.

A middle embedded rubber water stop is arranged between the low side wall and the assembling annular construction joint of the prefabricated assembly type lining, and an outer surface edge of the middle embedded rubber water stop is provided with an outer attached rubber water stop.

An elastic rubber sealing gasket is arranged between the short side wall and the longitudinal joint of the prefabricated lining.

The distance between the opening of the water drainage hole and the bottom of the drainage side ditch is not less than 25cm, the gradient is not less than 10 percent, and the longitudinal distance is 1.5 to 2.5m.

The width of the convex-shell type drainage plate is 0.8-1.2 m, and the longitudinal distance is 3.5-4.5 m.

The diameter of the longitudinal drainage blind pipe is 80-120 mm.

The distance between each drainage side ditch, each drainage blind pipe, each inclined drainage pipe and each central drainage pipe and the assembly annular construction joint of the prefabricated assembly type lining is not less than 1m.

The utility model discloses based on the beneficial effect that its technical scheme had lies in:

(1) The prefabricated assembled lining structure for mountain tunnel water drainage prevention provided by the utility model has compact and reasonable structure, and on the basis of the existing lining water drainage prevention structure, the structure of the prefabricated assembled lining is considered to be improved, so that the water drainage prevention effect of the prefabricated assembled lining of mountain tunnel can be greatly improved;

(2) The utility model provides a pair of prefabricated assembled lining cutting of mountain tunnel water drainage has been removed hoop blind pipe among the traditional drainage structures from, adopts the drainage side ditch of two sides in the hole to add central escape canal, sets up protruding shell type drain bar in prefabricated lining cutting circumferential weld department, utilizes the vertical drainage blind pipe of limit plinth to incorporate into the drainage side ditch, reaches the drainage purpose, easily installs, and drainage effect is good.

Drawings

Fig. 1 is the utility model provides a prefabricated assembled lining cutting section structure sketch of mountain tunnel waterproof and drainage.

Fig. 2 is a schematic sectional view taken along line I-I of fig. 1.

In the figure: 1-primary support, 2-convex shell type drainage plates, 3-geotextile layers, 4-water stop belt layers, 5-back backfill grouting layers, 6-prefabricated assembly type lining, 7-elastic rubber sealing gaskets, 8-central drainage pipes, 9-longitudinal drainage blind pipes, 10-oblique drainage pipes, 11-central drainage ditches, 12-drainage side ditches, 13-short side walls and 14-assembly annular construction joints.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

The utility model provides a prefabricated assembled lining cutting of mountain ridge tunnel waterproof and drainage, refer to figure 1 and figure 2, including the lining cutting body, the lining cutting body includes the prefabricated assembled lining cutting 6 of outer preliminary bracing 1 and inlayer, the invert both sides bottom of prefabricated assembled lining cutting is equipped with short side wall 13, outside-in has filled geotechnological cloth layer 3 in proper order between preliminary bracing and the prefabricated assembled lining cutting, waterstop layer 4 and backfill slip casting layer 5 behind one's back, the hoop 14 departments of assembling that lie in prefabricated assembled lining between preliminary bracing and the geotechnological cloth layer are equipped with convex shell type drain bar 2 to construction joint, seam department is equipped with the sealed pad 7 of elastic rubber between the lining cutting piece of prefabricated assembled lining cutting.

The bottom center of lining cutting body is equipped with along the central escape canal 11 of tunnel depth direction extension, and low boundary wall is equipped with along the drainage lateral ditch 12 of tunnel depth direction extension, lies in boundary wall foot department between preliminary bracing and the convex shell type waterproof board and is equipped with vertical drainage blind pipe 9 and outlet, and wherein the export of vertical drainage blind pipe and the slant drain pipe 10 intercommunication of bending into the drainage lateral ditch, communicate through central drain pipe 8 between drainage lateral ditch and the central escape canal.

The distance between the opening of the drain hole and the drain side ditch bottom is not less than 25cm, the gradient is not less than 10 percent, and the longitudinal distance is 1.5 to 2.5m. In this embodiment, a longitudinal interval of 2m is adopted.

The width of the convex shell type drainage plate is 0.8-1.2 m, the longitudinal distance is 3.5-4.5 m, in the embodiment, the convex shell type drainage plate with the width of 1m is adopted, and the longitudinal distance is 4m.

The diameter of the longitudinal drainage blind pipe is 80-120 mm, in the embodiment, a maintainable plastic fiber drainage filter pipe with the diameter of 100mm is adopted as the longitudinal drainage blind pipe, and the distance between the pipes can be set to be 10m.

The utility model provides a pair of prefabricated assembled lining cutting of mountain tunnel water drainage is compact reasonable, on current lining cutting water drainage structures's basis, considers the structure of prefabricated assembled lining cutting to improve, can improve mountain tunnel prefabricated assembled lining cutting's water drainage effect of preventing by a wide margin.

Claims

1. The utility model provides a prefabricated assembled lining of mountain tunnel waterproof and drainage, includes the lining cutting body, its characterized in that: the lining body comprises an outer primary support (1) and an inner prefabricated assembly type lining (6), wherein short side walls (13) are arranged at the bottoms of two sides of an inverted arch of the prefabricated assembly type lining, a geotextile layer (3), a water stop belt layer (4) and a back backfill grouting layer (5) are sequentially filled between the primary support and the prefabricated assembly type lining from outside to inside, a convex shell type drainage plate (2) is arranged at an assembly annular construction joint (14) between the primary support and the geotextile layer, an elastic rubber sealing gasket (7) is arranged at a joint between lining pieces of the prefabricated assembly type lining, a central drainage ditch (11) extending along the longitudinal depth direction of the tunnel is arranged at the center of the bottom of the lining body, a drainage side ditch (12) extending along the longitudinal depth direction of the tunnel is arranged on the short side wall, a longitudinal drainage pipe (9) and a drainage hole are arranged at a side wall foot between the primary support and the convex shell type waterproof plate, an outlet of the longitudinal drainage blind pipe is communicated with an inclined drainage pipe (10) bent into the drainage side ditch, and the central drainage pipe is communicated with the central drainage ditch through the central drainage pipe (8).

2. The prefabricated waterproof and waterproof fabricated lining for mountain tunnels of claim 1, wherein: a middle embedded rubber water stop is arranged between the low side wall and the assembling annular construction joint of the prefabricated assembly type lining, and an outer surface edge of the middle embedded rubber water stop is provided with an outer attached rubber water stop.

3. The mountain tunnel waterproof and drainage prefabricated lining as claimed in claim 1, wherein: an elastic rubber sealing gasket is arranged between the short side wall and the longitudinal joint of the prefabricated lining.

4. The mountain tunnel waterproof and drainage prefabricated lining as claimed in claim 1, wherein: the distance between the opening of the drain hole and the drain side ditch bottom is not less than 25cm, the gradient is not less than 10 percent, and the longitudinal distance is 1.5 to 2.5m.

5. The mountain tunnel waterproof and drainage prefabricated lining as claimed in claim 1, wherein: the width of the convex-shell type drainage plate is 0.8-1.2 m, and the longitudinal distance is 3.5-4.5 m.

6. The prefabricated waterproof and waterproof fabricated lining for mountain tunnels of claim 1, wherein: the diameter of the longitudinal drainage blind pipe is 80-120 mm.

7. The prefabricated waterproof and waterproof fabricated lining for mountain tunnels of claim 1, wherein: the distance between each drainage lateral ditch, each drainage blind pipe, each inclined drainage pipe and each central drainage pipe and the spliced annular construction joint of the prefabricated lining is not less than 1m.