Tunnel stream water guiding and draining structure

Abstract

The utility model relates to a tunnel strand water guiding and discharging structure which comprises a guiding and discharging pipe, a fixing assembly and a sealant. The upper end of the drainage pipe is drilled into a rock surface water seepage point, the lower end of the drainage pipe is led into a tunnel side ditch, and the middle part of the drainage pipe is buried in a primary support and fixed through the fixing assembly; the upper end of the drainage pipe is connected with the water seepage point through the sealant. The fixing assembly comprises a plurality of anchoring nails which are arranged at equal intervals, and the middle of the drainage pipe is fixed in the primary support. A V-shaped groove with the depth of 30 cm is formed in the water seepage point in a chiseling mode, and the upper end of the drainage pipe is connected into the V-shaped groove through the sealant. The utility model aims to overcome the defects in the prior art, and provides the tunnel strand water drainage structure which is convenient to construct and low in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to a tunnel water diversion and drainage structure. Background Art

[0002] When high-speed railways are laid in mountainous areas, they need to pass through the strata due to the influence of the terrain and existing ground buildings, and a large number of tunnels need to be built.

[0003] The tunnel drainage design adopts the principle of "combining prevention, drainage, blocking and interception, adapting to local conditions and comprehensive management". In view of the small amount of water on the surface of the tunnel surrounding rock (the flow rate does not exceed 200m3 / d), the existing drainage structure is complex, the construction time is long and the cost is high; a simple drainage structure is needed to prevent tunnel flooding. Therefore, a tunnel water drainage structure is proposed to solve the above problems. Utility Model Content

[0004] The utility model aims to overcome the existing defects and provide a tunnel water diversion and drainage structure, which is convenient to construct and low in cost.

[0005] The technical solution to achieve the above object is: a tunnel water drainage structure, including a drainage pipe, a fixing assembly and a sealant;

[0006] The upper end of the drainage pipe is drilled into the seepage point on the rock surface, and the lower end is introduced into the tunnel side ditch. The middle part of the drainage pipe is buried in the initial support and fixed by the fixing assembly; the upper end of the drainage pipe is connected to the seepage point through the sealant.

[0007] Preferably, the fixing assembly includes a plurality of anchoring nails, and the plurality of anchoring nails are arranged at equal distances to fix the middle of the drainage pipe in the initial support.

[0008] Preferably, a V-shaped groove with a depth of 30 cm is chiseled out at the water seepage point, and the upper end of the drainage pipe is connected to the V-shaped groove through the sealant.

[0009] Preferably, the drainage pipe is a curved hard plastic PVC (polyvinyl chloride) pipe.

[0010] Preferably, the sealant is fast-setting cement mortar.

[0011] Preferably, a waterproof board is provided below the initial support, and the waterproof board is provided on the secondary lining.

[0012] Preferably, the initial support is composed of an I-beam steel arch frame, a hollow grouting anchor rod, a steel mesh and C25 shotcrete.

[0013] The beneficial effects of the utility model are as follows: the tunnel water diversion and drainage structure is provided with a diversion and drainage pipe, anchor nails and sealant, the upper end of the diversion and drainage pipe 1 is drilled into the seepage point of the rock surface, the lower end is introduced into the tunnel side ditch, the middle is fixed with anchor nails, and buried in the initial support. It is suitable for tunnel surrounding rock surface water and the water volume is small (the flow rate does not exceed 200m 3 / d) to prevent tunnel flooding. The structure is easy to construct, low in cost, and has good structural stability, ensuring functional use and operational safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the tunnel water diversion and drainage structure of the utility model;

[0015] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0016] In the figure: 1. Drainage pipe; 2. Anchor nails; 3. Sealant; 4. Seepage point; 5. Initial support; 6. Waterproof board; 7. Secondary lining; 8. Tunnel side ditch. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0018] The utility model will be further described below in conjunction with the accompanying drawings.

[0019] like Figure 1-2 As shown, a tunnel water diversion structure includes a drainage pipe 1, a fixing assembly and a sealant 3; the upper end of the drainage pipe 1 is drilled into the seepage point 4 on the rock surface, and the lower end is introduced into the tunnel side ditch 8. The drainage pipe 1 is a curved hard plastic PVC pipe with a diameter of 80 mm, and the length is determined according to the position of the seepage point 4. The middle part of the drainage pipe 1 is buried in the initial support 5 and fixed by the fixing assembly; the fixing assembly includes a plurality of anchor nails 2, and the plurality of anchor nails 2 are arranged at equal distances to fix the middle of the drainage pipe 1 in the initial support 5. The upper end of the drainage pipe 1 is connected to the seepage point 4 through the sealant 3. The sealant 3 is a fast-setting cement mortar.

[0020] Specifically, a V-shaped groove with a depth of 30 cm is chiseled out at the water seepage point 4 , and the upper end of the drainage pipe 1 is connected to the V-shaped groove through the sealant 3 .

[0021] Specifically, a waterproof board 6 is arranged below the initial support 5, and the waterproof board 6 is arranged on the secondary lining 7. The initial support 5 is composed of an I-beam steel arch frame, a hollow grouting anchor rod, a steel mesh and C25 shotcrete, and the steel mesh can be a φ8 steel mesh.

[0022] During construction:

[0023] Grooving and fixing of surrounding rock of excavation face:

[0024] After tunnel excavation, check the water discharge from the excavation surface before the initial spraying. If there is a small amount of water seepage, dig a V-shaped groove with a depth of 30cm at the water seepage point. Place one end of the drainage pipe 1 directly opposite the V-shaped groove and fix it to the bedrock surface with anchor nails 2. The anchor nails are arranged equidistantly every 2-30cm to ensure that most of the seepage water is drained from the drainage pipe 1 to the tunnel side ditch 8.

[0025] Quick Seal:

[0026] Clean the V-shaped groove at the water seepage point with water, then twist the prepared sealant 3 into a cone-shaped ball close to the groove diameter. When the sealant 3 begins to solidify, quickly press it into the groove and squeeze it tightly for about half a minute.

[0027] Initial support construction:

[0028] After the sealant 3 has finally set, the construction of the tunnel initial support 5, waterproof board 6 and secondary lining 7 can be carried out. During the process, care should be taken to protect the drainage pipes to prevent damage, displacement and deformation.

[0029] The tunnel water diversion and drainage structure is provided with a diversion and drainage pipe 1, anchor nails 2 and sealant 3. The upper end of the diversion and drainage pipe 1 is drilled into the seepage point of the rock surface, and the lower end is introduced into the tunnel side ditch 8. The middle is fixed with anchor nails 2 and buried in the initial support 5. It is suitable for tunnel surrounding rock surface with small water volume (flow rate not exceeding 200m 3 / d) to prevent tunnel flooding. The structure is easy to construct, low in cost, and has good structural stability, ensuring functional use and operational safety.

[0030] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A tunnel water diversion and drainage structure, characterized in that: It comprises a drainage pipe (1), a fixing component and a sealant (3); The upper end of the drainage pipe (1) is drilled into the water seepage point (4) on the rock surface, and the lower end is introduced into the tunnel side ditch (8); the middle part of the drainage pipe (1) is buried in the initial support (5) and fixed by the fixing assembly; the upper end of the drainage pipe (1) is connected to the water seepage point (4) through the sealant (3).

2. The tunnel water diversion and drainage structure according to claim 1, characterized in that: The fixing assembly comprises a plurality of anchoring nails (2), and the plurality of anchoring nails (2) are arranged at equal distances to fix the middle of the drainage pipe (1) in the initial support (5).

3. The tunnel water diversion and drainage structure according to claim 1, characterized in that: The water seepage point (4) is chiseled out into a V-shaped groove with a depth of 30 cm, and the upper end of the drainage pipe (1) is connected to the V-shaped groove through the sealant (3).

4. The tunnel water diversion and drainage structure according to claim 1, characterized in that: The drainage pipe (1) is a curved hard plastic PVC pipe.

5. The tunnel water diversion and drainage structure according to claim 3, characterized in that: The sealant (3) is fast-setting cement mortar.

6. The tunnel water diversion and drainage structure according to claim 1, characterized in that: A waterproof board (6) is arranged below the initial support (5), and the waterproof board (6) is arranged on the secondary lining (7).

7. The tunnel water diversion and drainage structure according to claim 1, characterized in that: The initial support (5) is composed of an I-beam steel arch frame, a hollow grouting anchor rod, a steel mesh and C25 shotcrete.

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