A longitudinal system drainage structure and construction plan for a tunnel ring

Abstract

The present invention provides a longitudinal system drainage structure and construction plan for a tunnel ring, which includes an arch wall and primary support. The cross-section of the arch wall is a semi-circular structure, and the upper surface of the primary support abuts against the top of the tunnel. The upper surface of the arch wall is provided with primary support, and the lower surface of the primary support is provided with a waterproof board. The waterproof board is located between the arch wall and the primary support. A geotextile is arranged on the surface of the waterproof board. A longitudinal drainage belt is arranged on both sides of the arch waist and both sides of the arch wall on the surface of the geotextile. The outer side of the bottom of the inverted arch body is arranged inside the primary support, and longitudinal blind pipes are symmetrically arranged on both sides of the inverted arch body. The circumferential drainage belt of the inverted arch is perpendicular to the longitudinal drainage belt, and a connection part is formed at the intersection of the two. Longitudinal side ditches are symmetrically arranged on both sides inside the arch wall. The circumferential drainage belt of the inverted arch extends into the longitudinal side ditch after passing through the fixing clamps arranged on the arch wall. The present invention enables the overall installation and construction of the tunnel arch wall and the bottom of the inverted arch, and its structure is simple, which can effectively improve the purpose of draining water from the tunnel surrounding rock.

Description

Technical Field

[0001] The invention belongs to the field of tunnel drainage systems, and in particular relates to a longitudinal and circumferential drainage structure and construction plan for tunnels. Background Art

[0002] In the existing technology, with the rapid development of traffic engineering, in order to cross mountain ranges, urban sensitive areas and other sections, it is inevitable to construct a large number of tunnel projects. According to the current tunnel waterproof and drainage structure, tunnel drainage basically adopts longitudinal and circumferential drainage blind pipes for drainage. During construction, the diameter of the circular blind pipe occupies part of the lining thickness. At the same time, due to the extrusion of concrete, the blind pipe is prone to deformation, and the construction quality is difficult to control. Moreover, since the position of groundwater is not easy to determine, diseases such as water leakage in the later lining are likely to occur.

[0003] In order to solve problems such as water leakage in the lining and the uplift of the inverted arch caused by the large water pressure at the bottom of the tunnel, it is necessary to study a new type of tunnel drainage system plan and structural form in combination with the tunnel drainage construction technology and drainage plan. Summary of the Invention

[0004] The problem to be solved by the present invention is to provide a longitudinal and circumferential drainage structure and construction plan for tunnels, which is particularly suitable for solving problems such as water leakage in the lining and the uplift of the inverted arch caused by the large water pressure at the bottom of the tunnel.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: to provide a longitudinal and circumferential drainage structure and construction plan for tunnels, including an arch wall and primary support. The cross-section of the arch wall is a semi-circular structure, and the upper surface of the primary support abuts against the top of the tunnel. The upper surface of the arch wall is provided with primary support, and the lower surface of the primary support is provided with a waterproof board. The waterproof board is located between the arch wall and the primary support. The surface of the waterproof board is provided with geotextile. On both sides of the arch waist and both sides of the arch wall on the surface of the geotextile, a longitudinal drainage belt is provided respectively. And on both sides of the arch wall at a circumferential interval of 10-12 m, a circumferential drainage belt of the arch wall is provided respectively. The longitudinal drainage belt and the circumferential drainage belt of the arch wall are perpendicular to each other and a connection part is formed at the intersection. The bottom of the arch wall is provided with an inverted arch body. The outer side of the bottom of the inverted arch body is arranged inside the primary support. Longitudinal blind pipes are symmetrically arranged on both sides of the inverted arch body. The end parts of the circumferential drainage belts of the arch wall on both sides are respectively inserted into the side walls of the longitudinal blind pipes on both sides. A silicone seal ring is arranged at the connection between the circumferential drainage belt of the arch wall and the longitudinal blind pipe. The inverted arch body is provided with an inverted arch circumferential drainage belt at intervals of 20-30 m on the surface of the primary support. A longitudinal drainage belt is provided on both sides of the bottom of the inverted arch body. The inverted arch circumferential drainage belt and the longitudinal drainage belt are perpendicular to each other and a connection part is formed at the intersection. The inverted arch circumferential drainage belt is connected to the side wall of the longitudinal blind pipe, and longitudinal side ditches are symmetrically arranged on both sides inside the arch wall. The inverted arch circumferential drainage belt extends into the longitudinal side ditch through a fixing clip arranged on the arch wall.

[0006] Non-woven fabrics are provided on both sides of the longitudinal drainage belt and the circumferential drainage belt, and the core materials of the longitudinal drainage belt and the circumferential drainage belt are made of polypropylene (PP).

[0007] Multiple drainage holes are provided inside the longitudinal drainage belt and the circumferential drainage belt, and the drainage holes are separated from each other by a polypropylene (PP) skeleton.

[0008] The longitudinal drainage belt and the circumferential drainage belt are fixed to the primary support by steel nails at the arch wall part.

[0009] A tunnel bottom filling is provided at the top of the inverted arch body, and a central drainage ditch is provided at the center inside the tunnel bottom filling. The central drainage ditch is connected to the longitudinal side ditches on both sides through a connecting pipe.

[0010] The circumferential drainage belt of the arch wall is provided on both sides of the construction joint, deformation joint and settlement joint.

[0011] The specific construction plan is as follows:

[0012] First step, produce the longitudinal drainage belt, the circumferential drainage belt of the arch wall and the circumferential drainage belt of the inverted arch in advance according to the project overview;

[0013] Second step, during the construction of the drainage belt, after the construction of the arch wall, the inverted arch body and the primary support is completed and a geotextile is laid on the surface, install the longitudinal drainage belt and the circumferential drainage belt of the arch wall on the surface of the geotextile, and connect the circumferential drainage belt of the arch wall to the longitudinal blind pipe through a silicone rubber seal ring at the bottom of the arch wall;

[0014] Third step, after the construction of the primary support of the inverted arch body is completed, install the longitudinal drainage belt and the circumferential drainage belt of the inverted arch on the surface of the primary support;

[0015] Fourth step, construct the waterproof board inside the longitudinal drainage belt, the circumferential drainage belt of the arch wall and the circumferential drainage belt of the inverted arch, and then construct the secondary lining. Connect the longitudinal blind pipe to the longitudinal side ditch through the circumferential drainage belt of the inverted arch;

[0016] Fifth step, construct and install the central drainage ditch in the tunnel bottom filling, and connect the central drainage ditch to the longitudinal side ditch through a connecting pipe.

[0017] During use, the water inside the tunnel will flow down along the arch wall through the longitudinal drainage belt and the circumferential drainage belt of the arch wall, then be discharged into the longitudinal side ditch through the longitudinal blind pipe, and be discharged into the central drainage ditch through the connecting pipe and then discharged.

[0018] The advantages and positive effects of the present invention are: due to the adoption of the above technical solution, the present invention can realize the overall installation construction of the tunnel arch wall and the bottom of the inverted arch, and its structure is simple and convenient for construction, which can effectively achieve the purpose of draining water from the tunnel surrounding rock, effectively improve the construction quality, improve the drainage of groundwater behind the lining, and reduce the occurrence of tunnel leakage and inverted arch heaving diseases. Description of the Drawings

[0019] Figure 1 is the front view structural schematic diagram of the present invention;

[0020] Figure 2 is the partial structural cross-sectional schematic diagram of the present invention;

[0021] Figure 3 is the connection structural schematic diagram of the invert drainage belt and the longitudinal blind pipe of the present invention;

[0022] Figure 4 is the connection structural schematic diagram of the circumferential drainage belt and the longitudinal blind pipe of the present invention;

[0023] Figure 5 is the top view structural schematic diagram of the drainage belt of the present invention;

[0024] Figure 6 is the front view structural schematic diagram of the drainage belt of the present invention;

[0025] In the figure:

[0026] 1. Arch wall, 2. Initial support, 3. Geotextile

[0027] 4. Longitudinal drainage belt, 5. Arch wall circumferential drainage belt, 6. Connection part

[0028] 7. Silicone rubber sealing ring, 8. Longitudinal blind pipe, 9. Invert body

[0029] 10. Fixing piece, 11. Longitudinal side ditch, 12. Non-woven fabric

[0030] 13. Drainage hole, 14. Invert circumferential drainage belt, 15. Central water channel

[0031] 16. Tunnel bottom filling, 17. Connecting pipe Detailed implementation manners

[0032] Such as Figure 1-6As shown in the figure, the present invention is a longitudinal system drainage structure and construction plan for a tunnel ring, including an arch wall 1 and a primary support 2. The cross-section of the arch wall 1 is a semi-circular structure, and the upper surface of the primary support 2 abuts against the top of the tunnel. The upper surface of the arch wall 1 is provided with the primary support 2, and the lower surface of the primary support 2 is provided with a waterproof board. The waterproof board is located between the arch wall 1 and the primary support 2. A geotextile 3 is provided on the surface of the waterproof board. On both sides of the arch waist and on both sides of the arch wall 1 on the surface of the geotextile 3, a longitudinal drainage belt 4 is provided respectively. And on both sides of the arch wall 1 at a circumferential interval of 10 - 12 m, an arch wall circumferential drainage belt 5 is provided respectively. The longitudinal drainage belt 4 and the arch wall circumferential drainage belt 5 are perpendicular to each other and a connection part 6 is formed at their intersection. The bottom of the arch wall 1 is provided with an invert body 9. The outer side of the bottom of the invert body 9 is arranged inside the primary support 2. Longitudinal blind pipes 8 are symmetrically arranged on both sides of the invert body 9. The end parts of the circumferential drainage belts 5 on both sides of the arch wall are respectively inserted into the side walls of the longitudinal blind pipes 8 on both sides. A silicone sealant ring 7 is provided at the connection of the arch wall circumferential drainage belt 5 and the longitudinal blind pipe 8. The invert body 9 is provided with an invert circumferential drainage belt 14 at intervals of 20 - 30 m on the surface of the primary support 2. On both sides of the bottom of the invert body 9, a longitudinal drainage belt 4 is provided respectively. The invert circumferential drainage belt 14 and the longitudinal drainage belt 4 are perpendicular to each other and a connection part 6 is formed at their intersection. The invert circumferential drainage belt 14 is connected to the side wall of the longitudinal blind pipe 8. And longitudinal side ditches 11 are symmetrically arranged on both sides inside the arch wall 1. The invert circumferential drainage belt 14 extends into the longitudinal side ditch 11 after passing through the fixing clip 10 provided on the arch wall 1.

[0033] Non-woven fabrics 12 are provided on both sides of the longitudinal drainage belt 4 and the circumferential drainage belt. The core materials of the longitudinal drainage belt 4 and the circumferential drainage belt are made of polypropylene PP.

[0034] A plurality of drainage holes 13 are provided inside the longitudinal drainage belt 4 and the circumferential drainage belt, and the drainage holes 13 are separated from each other by a polypropylene (PP) skeleton.

[0035] The longitudinal drainage belt 4 and the circumferential drainage belt are fixed to the primary support 2 by steel nails at the arch wall 1 part.

[0036] A tunnel bottom filling 16 is provided at the top of the invert body 9. A central drainage ditch 15 is provided at the center inside the tunnel bottom filling 16. The central drainage ditch 15 is communicated with the longitudinal side ditches 11 on both sides through a connecting pipe 17.

[0037] The arch wall circumferential drainage belt 5 is arranged on both sides of the construction joint, deformation joint and settlement joint.

[0038] The specific construction plan is as follows:

[0039] The first step is to produce the longitudinal drainage belt 4, the arch wall circumferential drainage belt 5 and the invert circumferential drainage belt 14 in advance according to the project overview;

[0040] In the second step, during the construction of the drainage belts, after the construction of the arch wall 1, the inverted arch body 9, and the primary support 2 is completed and a geotextile 3 is laid on the surface, a longitudinal drainage belt 4 and an arch wall circumferential drainage belt 5 are installed on the surface of the geotextile 3, and the arch wall circumferential drainage belt 5 is connected to the longitudinal blind pipe 8 through a silicone seal ring 7 at the bottom of the arch wall 1;

[0041] In the third step, after the construction of the primary support 2 of the inverted arch body 9 is completed, a longitudinal drainage belt 4 and an inverted arch circumferential drainage belt 14 are installed on the surface of the primary support 2;

[0042] In the fourth step, a waterproof board is constructed on the inner sides of the longitudinal drainage belt 4, the arch wall circumferential drainage belt 5, and the inverted arch circumferential drainage belt 14, and then the secondary lining is constructed. The longitudinal blind pipe 8 is connected to the longitudinal side ditch 11 through the inverted arch circumferential drainage belt 14;

[0043] In the fifth step, the central water channel 15 is constructed and installed in the tunnel bottom filling 16, and the central water channel 15 is connected to the longitudinal side ditch 11 through a connecting pipe 17.

[0044] During use, the water inside the tunnel will flow down along the arch wall 1 through the longitudinal drainage belt 4 and the arch wall circumferential drainage belt 5, then be discharged into the longitudinal side ditch 11 through the longitudinal blind pipe 8, and be discharged into the central water channel 15 through the connecting pipe 17 and then discharged.

[0045] The above has described an embodiment of the present invention in detail, but the content described is only a preferred embodiment of the present invention and cannot be considered as being used to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention application shall still fall within the scope covered by the patent of the present invention.

Claims

1. A longitudinal system drainage structure for a tunnel ring, characterized in that: It includes an arch wall (1) and a primary support (2). The cross-section of the arch wall (1) is a semi-circular structure, and the upper surface of the primary support (2) abuts against the top of the tunnel. The upper surface of the arch wall (1) is provided with the primary support (2). The lower surface of the primary support (2) is provided with a waterproof board, and the waterproof board is located between the arch wall (1) and the primary support (2). A geotextile (3) is arranged on the surface of the waterproof board. On both sides of the arch waist and on both sides of the arch wall (1) on the surface of the geotextile (3), a longitudinal drainage belt (4) is arranged respectively. And on both sides of the arch wall (1) with a circumferential interval of 10 - 12 m, an arch wall circumferential drainage belt (5) is arranged respectively. The longitudinal drainage belt (4) and the arch wall circumferential drainage belt (5) are perpendicular to each other and a connection part (6) is formed at the intersection. The bottom of the arch wall (1) is provided with an invert body (9). The outer side of the bottom of the invert body (9) is arranged inside the primary support (2). Longitudinal blind pipes (8) are symmetrically arranged on both sides of the invert body (9). The end parts of the arch wall circumferential drainage belts (5) on both sides are respectively inserted into the side walls of the longitudinal blind pipes (8) on both sides. A silicone sealant ring (7) is arranged at the connection of the arch wall circumferential drainage belt (5) and the longitudinal blind pipe (8). The invert body (9) is provided with an invert circumferential drainage belt (14) at intervals of 20 - 30 m on the surface of the primary support (2). On both sides of the bottom of the invert body (9), a longitudinal drainage belt (4) is arranged respectively. The invert circumferential drainage belt (14) and the longitudinal drainage belt (4) are perpendicular to each other and a connection part (6) is formed at the intersection. The invert circumferential drainage belt (14) is connected to the side wall of the longitudinal blind pipe (8). And longitudinal side ditches (11) are symmetrically arranged on both sides inside the arch wall (1). The invert circumferential drainage belt (14) extends into the longitudinal side ditch (11) through a fixing clip (10) arranged on the arch wall (1); Non-woven fabrics (12) are arranged on both sides of the longitudinal drainage belt (4) and the circumferential drainage belt. The core materials of the longitudinal drainage belt (4) and the circumferential drainage belt are made of polypropylene (PP); A tunnel bottom filling material (16) is arranged on the top of the invert body (9). A central water ditch (15) is arranged at the center inside the tunnel bottom filling material (16). The central water ditch (15) is communicated with the longitudinal side ditches (11) on both sides through a communicating pipe (17); A plurality of drainage holes (13) are arranged inside the longitudinal drainage belt (4) and the circumferential drainage belt. And the drainage holes (13) are separated from each other by a polypropylene framework.

2. The longitudinal system drainage structure for a tunnel ring according to claim 1, characterized in that: The longitudinal drainage belt (4) and the circumferential drainage belt are fixed on the primary support (2) by steel nails at the position of the arch wall (1).

3. The longitudinal system drainage structure for a tunnel ring according to claim 1, characterized in that: The arch wall circumferential drainage belt (5) is arranged on both sides of construction joints, deformation joints and settlement joints.

4. A construction method for the longitudinal system drainage structure of the tunnel ring according to any one of claims 1 - 3, characterized in that: First step, produce the longitudinal drainage belt (4), the arch wall circumferential drainage belt (5) and the invert circumferential drainage belt (14) in advance according to the project overview; In the second step, during the construction of the drainage belts, after the construction of the arch wall (1), the inverted arch body (9) and the primary support (2) is completed and the geotextile (3) is laid on the surface, the longitudinal drainage belt (4) and the arch wall circumferential drainage belt (5) are installed on the surface of the geotextile (3), and the arch wall circumferential drainage belt (5) is connected to the longitudinal blind pipe (8) through the silicone rubber sealing ring (7) at the bottom of the arch wall (1). In the third step, after the construction of the primary support (2) of the inverted arch body (9) is completed, the longitudinal drainage belt (4) and the inverted arch circumferential drainage belt (14) are installed on the surface of the primary support (2). In the fourth step, a waterproof board is constructed inside the longitudinal drainage belt (4), the arch wall circumferential drainage belt (5) and the inverted arch circumferential drainage belt (14), and then the secondary lining is constructed. The longitudinal blind pipe (8) is communicated with the longitudinal side ditch (11) through the inverted arch circumferential drainage belt (14). In the fifth step, the central water channel (15) is constructed and installed in the tunnel bottom filling (16), and the central water channel (15) is communicated with the longitudinal side ditch (11) through the connecting pipe (17).

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