Waterproof and drainage structure at top of mid-partition wall of multi-arch tunnel

Abstract

The utility model discloses a multi-arch tunnel mid-partition top waterproof and drainage structure, and relates to the technical field of multi-arch tunnel mid-partition top waterproof and drainage. The waterproof and drainage structure for the top of the mid-partition wall of the multi-arch tunnel comprises a first primary support, a mid-partition wall body is arranged on one side of the first primary support, and a drainage mechanism is arranged on one side of the first primary support. According to the waterproof and drainage structure for the top of the mid-partition wall of the multi-arch tunnel, the longitudinal drainage pipe is arranged at the lowest position of the top of the mid-partition wall body, 1 / 4 of the pipe diameter is cut off from the top of the longitudinal drainage pipe, and the remaining part serves as a collecting channel for top drainage; water flow on the top of the wall flows into the longitudinal drainage pipes through the aggregate, non-woven geotechnical cloth is adopted on the outer sides of the aggregate to serve as inverted filter layers, silt is prevented from entering the longitudinal drainage pipes and blocking drainage channels, the longitudinal drainage pipes drain the water flow on the top to the vertical drainage pipes, and the bottoms of the vertical drainage pipes are connected with the secondary lining drainage pipes so that the water flow can be drained out of the tunnel.

Description

Technical Field

[0001] The utility model belongs to the technical field of drainage prevention at the top of a partition wall in a multi-arch tunnel, and in particular relates to a drainage prevention structure at the top of a partition wall in a multi-arch tunnel. Background Art

[0002] For a multi-arch tunnel, the central guide tunnel is usually excavated and supported first, followed by the construction of the central partition wall, and finally the excavation of the main tunnels on both sides, initial support, waterproofing and secondary lining construction.

[0003] The prior art does not have a drainage structure at the junction of the middle partition wall and the primary support when in use, which makes the existing design of the drainage measures on the top of the middle partition wall in the arch tunnel less effective. Water seepage is prone to occur at the junction of the middle partition wall and the primary support, which will lead to water leakage in the secondary lining of the main hole of the arch tunnel. In severe cases, it will further cause the second lining to crack. Based on the deficiencies of the existing technology, the utility model designs a drainage structure on the top of the middle partition wall in the arch tunnel. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model provides a drainage structure at the top of the middle partition wall of a multi-arch tunnel, which has the characteristic of drainage at the junction of the middle partition wall and the primary support.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a drainage structure at the top of a middle partition wall of a multi-arch tunnel, comprising an initial support 1, a middle partition wall body is arranged on one side of the initial support 1, and a drainage mechanism is arranged on one side of the initial support 1;

[0006] A drainage mechanism, the drainage mechanism includes collected gravel, non-woven geotextile, longitudinal drainage pipe, water collecting trough, connecting hole, vertical drainage pipe, secondary lining drainage pipe and positioning ring, the collected gravel is arranged on the top of the initial support one, the bottom of the collected gravel is arranged with non-woven geotextile, the longitudinal drainage pipe is arranged on one side of the initial support one, the interior of the longitudinal drainage pipe is provided with a water collecting trough, one side of the longitudinal drainage pipe is provided with a connecting hole, one side of the longitudinal drainage pipe is fixedly connected with a vertical drainage pipe, the lower surface of the vertical drainage pipe is fixedly connected with a secondary lining drainage pipe, and one side of the vertical drainage pipe is provided with a positioning ring.

[0007] As an optimal technical solution for the waterproof and drainage structure on the top of the partition wall in a multi-arch tunnel of the utility model, an initial support 2 is arranged on one side of the initial support 1, and a middle guide hole is arranged inside the initial support 1.

[0008] As a preferred technical solution for the waterproof and drainage structure on the top of a middle partition wall in a multi-arch tunnel of the utility model, a middle partition wall foundation is arranged at the bottom of the middle partition wall body, and the middle partition wall body is arranged inside the middle guide tunnel.

[0009] As an optimal technical solution for the waterproof and drainage structure on the top of the partition wall in a multi-arch tunnel of the utility model, the middle guide hole is arranged inside the initial support two, and a blind ditch is arranged between the initial support one and the initial support two.

[0010] As a preferred technical solution for the waterproof and drainage structure on the top of the partition wall in a multi-arch tunnel of the utility model, the aggregated gravel is arranged on one side of the initial support, and the non-woven geotextile is arranged at the bottom of the aggregated gravel.

[0011] As a preferred technical solution for the waterproof and drainage structure on the top of the partition wall in a multi-arch tunnel of the utility model, the non-woven geotextile is arranged on the top of the middle guide hole, and the non-woven geotextile is arranged on the top of the longitudinal drainage pipe.

[0012] As a preferred technical solution for the anti-drainage structure on the top of the partition wall in a multi-arch tunnel of the utility model, the longitudinal drainage pipe is arranged on the top of the middle guide hole, and the vertical drainage pipe is fixedly connected to the inside of the connecting hole.

[0013] As a preferred technical solution for the waterproof and drainage structure on the top of the middle partition wall of a multi-arch tunnel of the utility model, the secondary lining drainage pipe is arranged on the top of the middle partition wall foundation, and the positioning ring is fixedly connected to one side of the middle partition wall body.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. When the utility model is in use, a longitudinal drainage pipe is arranged at the lowest point on the top of the middle partition wall, 1 / 4 of the pipe diameter is cut off from the top of the longitudinal drainage pipe, and the remaining part is used as a collecting channel for top drainage. A collection gravel is arranged on the upper part of the cut part, and the water flow on the top of the wall flows into the longitudinal drainage pipe through the collection gravel. At the same time, a non-woven geotextile is used as an anti-filter layer on the outside of the collection gravel to prevent mud and sand from entering the longitudinal drainage pipe and blocking the drainage channel. The longitudinal drainage pipe is connected to the vertical drainage pipe through a connecting hole to discharge the top water flow to the vertical drainage pipe. The bottom of the vertical drainage pipe is connected to the secondary lining drainage pipe to discharge the water flow out of the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the initial support structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the middle guide hole of the utility model;

[0019] Figure 3This is a schematic diagram of the structure of the middle partition wall of the utility model;

[0020] Figure 4 This is a schematic diagram of the longitudinal drainage pipe structure of the utility model;

[0021] Figure 5 It is a schematic diagram of the drainage mechanism structure of the utility model.

[0022] In the figure: 1. Initial support one; 101. Initial support two; 102. Middle guide hole; 2. Middle partition wall body; 201. Middle partition wall foundation; 3. Drainage mechanism; 301. Collected gravel; 302. Non-woven geotextile; 303. Longitudinal drainage pipe; 304. Collection trough; 305. Connection hole; 306. Vertical drainage pipe; 307. Second lining drainage pipe; 308. Positioning ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example 1

[0025] See also Figure 1-5 The utility model provides the following technical solutions: a drainage structure at the top of a middle partition wall of a multi-arch tunnel, comprising an initial support 1, a middle partition wall body 2 is arranged on one side of the initial support 1, and a drainage mechanism 3 is arranged on one side of the initial support 1;

[0026] An initial support 2 101 is provided on one side of the initial support 1 , and a middle guide hole 102 is provided inside the initial support 1 .

[0027] A middle partition wall foundation 201 is provided at the bottom of the middle partition wall body 2 , and the middle partition wall body 2 is arranged inside the middle guide hole 102 .

[0028] The middle guide hole 102 is arranged inside the primary support 101 , and a blind ditch is arranged between the primary support 1 and the primary support 101 .

[0029] What needs to be further explained is that after the construction of the middle partition wall 2 is completed, the excavation of the main tunnels on both sides, the construction of initial support 1, initial support 2 101 and secondary lining will be carried out. During the construction of initial support 1 and initial support 2 101, the steel arch frame on the side of the middle guide tunnel 102 is directly placed on the top of the middle guide tunnel 102 to play a supporting role. During the spraying process of initial support 1 and initial support 2 101, the gap between the top of the middle guide tunnel 102 and the tunnel surrounding rock will be sprayed densely, and the spraying construction will be carried out from bottom to top.

[0030] Example 2

[0031] See also Figure 2-5 , the utility model provides the following technical solutions:

[0032] Drainage mechanism 3, the drainage mechanism 3 includes collected gravel 301, non-woven geotextile 302, longitudinal drainage pipe 303, water collecting trough 304, connecting hole 305, vertical drainage pipe 306, secondary lining drainage pipe 307 and positioning ring 308, the collected gravel 301 is arranged on the top of the initial support 1, the non-woven geotextile 302 is arranged on the bottom of the collected gravel 301, the longitudinal drainage pipe 303 is arranged on one side of the initial support 1, the water collecting trough 304 is opened inside the longitudinal drainage pipe 303, the connecting hole 305 is opened on one side of the longitudinal drainage pipe 303, the vertical drainage pipe 306 is fixedly connected to one side of the longitudinal drainage pipe 303, the secondary lining drainage pipe 307 is fixedly connected to the lower surface of the vertical drainage pipe 306, and the positioning ring 308 is arranged on one side of the vertical drainage pipe 306.

[0033] The aggregated gravel 301 is arranged on one side of the initial support 1, and the non-woven geotextile 302 is arranged at the bottom of the aggregated gravel 301.

[0034] The non-woven geotextile 302 is arranged on the top of the middle guide hole 102 , and the non-woven geotextile 302 is arranged on the top of the longitudinal drainage pipe 303 .

[0035] The longitudinal drainage pipe 303 is arranged at the top of the middle guide hole 102 , and the vertical drainage pipe 306 is fixedly connected to the inside of the connecting hole 305 .

[0036] The secondary lining drainage pipe 307 is arranged on the top of the middle partition wall foundation 201 , and the positioning ring 308 is fixedly connected to one side of the middle partition wall body 2 .

[0037] What needs to be further explained is that a longitudinal drainage pipe 303 is placed at the lowest point on the top of the middle partition wall 2. The longitudinal drainage pipe 303 adopts an 80mm PVC pipe. 1 / 4 of the pipe diameter is cut off from the top of the longitudinal drainage pipe 303, and the remaining part is used as a collection channel for top drainage. A collection gravel 301 is set on the upper part of the cut part to allow the top water flow to flow into the longitudinal drainage pipe 303 through the collection gravel 301. At the same time, a non-woven geotextile 302 is used as a filter layer on the outside of the collection gravel 301 to prevent mud and sand from entering the longitudinal drainage pipe 303 and blocking the drainage channel. The longitudinal drainage pipe 303 is connected to the vertical drainage pipe 306 through the connecting hole 305 to discharge the top water flow to the vertical drainage pipe 306. The vertical drainage pipe 306 adopts a 100 hole-free corrugated pipe and is set at an interval of 25m. The bottom of the vertical drainage pipe 306 is connected to the secondary lining drainage pipe 307 to discharge the water out of the tunnel.

[0038] Working principle: When a waterproof drainage structure on the top of the middle partition wall of a multi-arch tunnel is used, first of all, it is constructed before the formal excavation of the multi-arch tunnel. It can be used as a geological survey method for the excavation of the main tunnel. The approximate situation of the tunnel surrounding rock can be known in advance, and preparations can be made for the excavation of the main tunnel in advance; after the construction of the middle guide tunnel 102 is completed, the center line of the middle partition wall 2 is laid out according to the design drawings, and the reinforcement of the middle partition wall 2 is constructed after measurement and layout. After the middle partition wall 2 is cast, a longitudinal drainage pipe 303 is placed at the lowest point on the top of the middle partition wall 2. The longitudinal drainage pipe 303 adopts an 80mm PVC pipe, and 1 / 4 of the pipe diameter is cut off from the top of the longitudinal drainage pipe 303. The remaining part is used as a collection channel for top drainage. Collecting gravel 301 is set on the upper part of the cut part to make the water flow on the top of the wall flow into the longitudinal drainage pipe 303 through the collecting gravel 301. At the same time, non-woven geotextile 302 is used as an anti-filter layer on the outside of the collecting gravel 301 to prevent mud and sand from entering the longitudinal drainage pipe 303 and blocking the drainage channel. The longitudinal drainage pipe 303 is connected to the vertical drainage pipe 306 through the connecting hole 305 to discharge the top water flow to the vertical drainage pipe 306. The vertical drainage pipe 306 adopts 100 non-porous corrugated pipe and is set at an interval of 25m. The bottom of the vertical drainage pipe 306 is connected to the secondary lining drainage pipe 307 to discharge the water out of the tunnel.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A waterproof and drainage structure for the top of a partition wall in a multi-arch tunnel, comprising an initial support (1), characterized in that: A middle partition wall body (2) is provided on one side of the initial support (1), and a drainage mechanism (3) is provided on one side of the initial support (1); A drainage mechanism (3), the drainage mechanism (3) comprising a collection crushed stone (301), a non-woven geotextile (302), a longitudinal drainage pipe (303), a water collecting trough (304), a connecting hole (305), a vertical drainage pipe (306), a secondary lining drainage pipe (307) and a positioning ring (308), the collection crushed stone (301) is arranged on the top of the initial support (1), the bottom of the collection crushed stone (301) is provided with a non-woven geotextile (302), the longitudinal drainage pipe (303) The longitudinal drainage pipe (303) is arranged on one side of the initial support (1), a water collecting trough (304) is provided inside the longitudinal drainage pipe (303), a connecting hole (305) is provided on one side of the longitudinal drainage pipe (303), a vertical drainage pipe (306) is fixedly connected to one side of the longitudinal drainage pipe (303), a secondary lining drainage pipe (307) is fixedly connected to the lower surface of the vertical drainage pipe (306), and a positioning ring (308) is provided on one side of the vertical drainage pipe (306).

2. The waterproof and drainage structure at the top of the partition wall in a multi-arch tunnel according to claim 1, characterized in that: An initial support 2 (101) is arranged on one side of the initial support 1 (1), and a middle guide hole (102) is arranged inside the initial support 1 (1).

3. The waterproof and drainage structure at the top of the partition wall in a multi-arch tunnel according to claim 1, characterized in that: A middle partition wall foundation (201) is provided at the bottom of the middle partition wall body (2), and the middle partition wall body (2) is arranged inside the middle guide hole (102).

4. The waterproof and drainage structure at the top of the partition wall in a multi-arch tunnel according to claim 2, characterized in that: The middle guide hole (102) is arranged inside the second initial support (101), and a blind ditch is arranged between the first initial support (1) and the second initial support (101).

5. The waterproof and drainage structure at the top of the partition wall in a multi-arch tunnel according to claim 1, characterized in that: The aggregated gravel (301) is arranged on one side of the initial support (1), and the non-woven geotextile (302) is arranged at the bottom of the aggregated gravel (301).

6. The waterproof and drainage structure at the top of the partition wall in a multi-arch tunnel according to claim 1, characterized in that: The non-woven geotextile (302) is arranged on the top of the middle guide hole (102), and the non-woven geotextile (302) is arranged on the top of the longitudinal drainage pipe (303).

7. The waterproof and drainage structure at the top of the partition wall in a multi-arch tunnel according to claim 1, characterized in that: The longitudinal drainage pipe (303) is arranged at the top of the middle guide hole (102), and the vertical drainage pipe (306) is fixedly connected to the inside of the connection hole (305).

8. The waterproof and drainage structure at the top of the partition wall in a multi-arch tunnel according to claim 1, characterized in that: The secondary lining drainage pipe (307) is arranged on the top of the middle partition wall foundation (201), and the positioning ring (308) is fixedly connected to one side of the middle partition wall body (2).

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