Waterproof and drainage device applied to shield tunnel

Abstract

The utility model discloses a waterproof and drainage device applied to a shield tunnel, which comprises a drainage system comprising a water collecting ditch, a limiting sleeve and a drainage pipe; the water collecting ditch is arranged on steel pipe pieces on the two sides of a tunnel ballast bed, the limiting sleeve is obliquely fixed to the steel pipe pieces of a tunnel, the gradient of the limiting sleeve is larger than or equal to 1%, one end of the drainage pipe penetrates into the limiting sleeve and is fixedly connected with the limiting sleeve, and the drainage pipe is communicated with the water collecting ditch. The drainage pipe can be prevented from having a reverse slope or a flat slope, so that smooth drainage of a tunnel is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of drainage structures, in particular to a drainage device applied to a shield tunnel. Background Art

[0002] In recent years, with the in-depth development and extensive use of urban underground space, subway rail transit has ushered in rapid development. Among them, the connecting channel set up between the two single-line section tunnels of the up and down lines not only undertakes multiple functions such as connection, drainage, personnel evacuation and fire prevention, but also can significantly reduce potential safety risks. Therefore, in the construction process of the connecting channel, the importance of setting up drainage devices is self-evident.

[0003] Usually, the slope of the drainage pipe of the connecting channel is required to be within the range of 1% to 3% to ensure smooth and efficient drainage. However, in the actual construction site, due to the influence of various factors, it is often difficult to strictly control this slope standard. During the construction of the drainage pipe, reverse slope or flat slope often occurs, which will undoubtedly have an adverse effect on the drainage efficiency of the entire tunnel drainage system, and may threaten the operational safety of the entire tunnel. Summary of the invention

[0004] The utility model provides a drainage prevention device applied to a shield tunnel, which can prevent a drainage pipe from having a reverse slope or a flat slope, thereby ensuring smooth drainage of the tunnel.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A drainage device for use in a shield tunnel, comprising: a drainage system, wherein the drainage system comprises a water collecting ditch, a limiting sleeve and a drainage pipe;

[0007] The water collecting ditch is arranged on the steel pipe segments on both sides of the tunnel roadbed, the limiting sleeve is fixed obliquely on the steel pipe segments of the tunnel, the slope of the limiting sleeve is ≥1%, one end of the drainage pipe penetrates into the limiting sleeve and is fixedly connected with the limiting sleeve, and the drainage pipe is communicated with the water collecting ditch.

[0008] Furthermore, it also includes fixing bolts, the limiting sleeve includes a main pipe and a flange part, one end of the main pipe is welded to the steel pipe segment, and the other end of the main pipe is welded to the flange part, and the flange part is connected to the steel pipe segment by fixing bolts.

[0009] Furthermore, it also includes a rubber sleeve, which is sleeved on the fixing bolt, and the outer wall of the rubber sleeve abuts against the main pipe.

[0010] Furthermore, the slope of the limiting sleeve is ≤3%.

[0011] Furthermore, it also includes a waterproof layer, which includes a buffer layer and a waterproof board. The waterproof board is arranged between the initial support and the secondary lining of the tunnel, and the buffer layer is arranged on a side of the waterproof board close to the initial support.

[0012] Furthermore, it also includes cement nails for edge sealing, and the waterproof board and the buffer layer are fixed to the initial support through the cement nails for edge sealing, and a metal strip is arranged between the tail of the cement nails for edge sealing and the waterproof board.

[0013] Furthermore, it also includes cement nails for fixing, and the buffer layer is fixed on the initial support by the cement nails for fixing;

[0014] A connector is provided on one side of the waterproof board close to the buffer layer. The connector is thermally welded to the waterproof board. The connector is set on the buffer layer through a fixing cement nail. A metal gasket is provided between the tail of the fixing cement nail and the connector.

[0015] Beneficial effects:

[0016] The utility model provides a drainage prevention device applied to a shield tunnel. By ensuring that a limiting sleeve fixed on a tunnel steel pipe segment meets the slope standard of the drainage pipe, a stable and reliable installation foundation is provided for the drainage pipe. The slope and elevation of the drainage pipe are limited by the limiting sleeve, so that water collected in the ditch can be discharged smoothly through the drainage pipe, thereby effectively ensuring the drainage efficiency of the drainage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of a drainage device applied to a shield tunnel disclosed in the utility model;

[0019] Figure 2 for Figure 1 The enlarged view of point F;

[0020] Figure 3 A schematic diagram of the edge sealing of a waterproof layer of a drainage device for a shield tunnel disclosed in the utility model;

[0021] Figure 4 A schematic diagram of fixing a waterproof layer of a waterproof and drainage device used in a shield tunnel disclosed in the utility model;

[0022] Figure 5 The present invention discloses a schematic diagram of the position of a drainage device and a ballast used in a shield tunnel.

[0023] In the figure:

[0024] 11. Buffer layer; 12. Waterproof board; 13. Metal pressure strip; 14. Cement nails for edge sealing; 15. Connectors; 16. Metal gaskets; 17. Cement nails for fixing;

[0025] 21. Drainage ditch; 22. Drain pipe; 23. Main pipe; 24. Flange; 25. Fixing bolt; 26. Rubber sleeve;

[0026] 3. Waterproof mortar sealing;

[0027] 4. Cold self-adhesive roll;

[0028] 5. Sealant;

[0029] 6. Self-adhesive butyl tape;

[0030] 7. Polyurethane sealant;

[0031] A. Ballast bed; B. Steel pipe segments; C. Initial support; D. Secondary lining; E. Grouting duct. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of 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.

[0033] This embodiment provides a drainage device for shield tunnels, including: a drainage system, such as Figure 1 As shown, the drainage system includes a water collecting ditch 21, a limiting sleeve and a drainage pipe 22;

[0034] like Figure 1 and Figure 5 As shown, the water collecting ditch 21 is arranged on the steel pipe segments B on both sides of the tunnel roadbed A. The water collecting ditch 21 is used to collect water flowing down from the side of the roadbed A (mainly leakage water. Cracks are allowed in the concrete of underground engineering. Under the premise of "prevention first", the groundwater leaking into the structure can be guided away by drainage. A small part is the condensed water of the subway air conditioner). In this embodiment, the tunnel is a communication channel, and the limiting sleeve is tilted and fixed on the steel pipe segment B of the tunnel. The slope of the limiting sleeve is ≥1% and the slope of the limiting sleeve is ≤3%;

[0035] One end of the drainage pipe 22 passes through the limiting sleeve and is welded and fixed to the limiting sleeve, and the drainage pipe 22 is connected to the water collecting ditch 21;

[0036] The present embodiment provides a drainage and prevention device for use in shield tunnels. The limiting sleeve fixed on the tunnel steel pipe segment B satisfies the drainage pipe slope standard, thereby providing a stable and reliable installation foundation for the drainage pipe 22. The limiting sleeve limits the slope and elevation of the drainage pipe 22, so that the water collected in the ditch 21 can be discharged smoothly through the drainage pipe 22, effectively ensuring the drainage efficiency of the drainage system.

[0037] In a specific embodiment, Figure 2 As shown, it also includes a fixing bolt 25, the limiting sleeve includes a main pipe 23 and a flange portion 24, one end of the main pipe 23 is welded to the steel pipe segment B, and the other end of the main pipe 23 is welded to the flange portion 24, and the flange portion 24 is connected to the steel pipe segment B through the fixing bolt 25 (the steel pipe segment B is provided with a threaded hole corresponding to the fixing bolt 25);

[0038] The end of the limiting sleeve away from the steel pipe segment B is fixed by fixing bolts 25, so that the limiting sleeve can be fixed on the steel pipe segment B more firmly.

[0039] In a specific embodiment, Figure 2 As shown, it also includes a rubber sleeve 26, which is sleeved on the fixing bolt 25, and the outer wall of the rubber sleeve 26 abuts against the main pipe 23. By arranging the rubber sleeve 26, the adverse effect of vibration generated when the vehicle travels in the tunnel on the fixing bolt 25 can be reduced.

[0040] In a specific embodiment, a waterproof layer is also included, such as Figure 1 and Figure 2 As shown, the waterproof layer includes a buffer layer 11 and a waterproof board 12, the waterproof board 12 is arranged between the initial support C and the secondary lining D of the tunnel, and the buffer layer 11 is arranged on a side of the waterproof board 12 close to the initial support C;

[0041] In this embodiment, the buffer layer 11 is a geotextile, and the waterproof board 12 is made of PVC. The buffer layer 11 plays a buffering and protective role on the waterproof board 1 to prevent the waterproof board 1 from being punctured by sharp and hard objects on the surface of the initial support C when they are not completely removed;

[0042] The waterproof board 12 not only plays a waterproof role, but also can play an isolation and lubrication role between the initial support C and the secondary lining D, preventing the secondary lining D from cracking due to the uneven surface of the initial support C, protecting and exerting the waterproof effect of the secondary lining D.

[0043] In a specific embodiment, Figure 3 As shown, it also includes cement nails 14 for edge sealing arranged at the edge of the waterproof layer, the waterproof board 12 and the buffer layer 11 are fixed on the initial support C by the cement nails 14 for edge sealing, and a metal pressure strip 13 is arranged between the tail of the cement nails 14 for edge sealing and the waterproof board 12, and the metal pressure strip 13 acts as a gasket to prevent the cement nails 14 for edge sealing from damaging the waterproof board 12;

[0044] In actual use, the tail of the edge-sealing cement nail 14 is provided with a polyurethane sealant 7, which covers the metal molding 5 and the waterproof board 12 and is in direct contact with the buffer layer 11, thereby preventing water from flowing into the initial support C from the edge-sealing cement nail 14.

[0045] In a specific embodiment, Figure 4 As shown, it also includes a fixing cement nail 17, and the buffer layer 11 is fixed on the initial support C through the fixing cement nail 17;

[0046] A connector 15 is provided on one side of the waterproof board 12 close to the buffer layer 11. In the present embodiment, the connector 15 is a plastic gasket, which is thermally welded to the waterproof board 12. The connector 15 is provided on the buffer layer 11 through a fixing cement nail 17. A metal gasket 16 is further provided between the tail of the fixing cement nail 17 and the connector 15.

[0047] In a specific embodiment, Figure 1 and Figure 2 As shown, the drain pipe 22 is wrapped with a self-adhesive butyl tape 6 , and the self-adhesive butyl tape 6 can protect the drain pipe 22 .

[0048] In actual construction, the initial support C is constructed by shotcrete. When the concrete thickness reaches the specified elevation, the water collecting ditch 21 and the drainage pipe 22 are installed. Before installing the water collecting ditch 21 and the drainage pipe 22, a notch for placing the water collecting ditch 21 and a through hole for allowing the drainage pipe 22 to pass through are first cut on the steel pipe segment B, and then the main pipe 23 is welded to the steel pipe segment B, and the flange 24 is connected to the steel pipe segment B by fixing bolts 25;

[0049] Then, the water collecting ditch 21 is welded and fixed on the steel pipe segment B. After one end of the drainage pipe 22 passes through the limiting sleeve, a hole for connecting the drainage pipe 22 is opened on the side wall of the water collecting ditch 21. Then, the drainage pipe 22 is welded and fixed to the side wall of the water collecting ditch 21. The drainage pipe 22 is welded and fixed to the limiting sleeve. The installation of the water collecting ditch 21 and the drainage pipe 22 is completed. At this time, the concrete is poured to make the initial support C reach the design elevation.

[0050] After the initial support C is cured, the buffer layer 11 and the waterproof board 12 are laid. The initial support C is leveled by spraying concrete or mortar. If there are sharp and hard objects such as iron pipes, steel bars, and iron wires on the surface of the initial support C, they should be cut off from the root and the cut parts should be covered with cement mortar. After treatment, the buffer layer 11 is laid first, and then the waterproof board 12 is laid;

[0051] like Figure 1 As shown, sealant 5 can be used to fill the gaps B between the steel pipe segments to achieve a sealing effect and prevent water from flowing into the secondary lining D. Both the initial support C and the secondary lining D need to be poured with the help of the grouting conduit E (to avoid obstruction, Figure 1 The grouting conduit E) in the initial support C is not shown. Figure 2 As shown, after the initial support C is poured, the inlet of the grouting conduit E set in the initial support C is blocked by the waterproof mortar plug 3, and the cold self-adhesive membrane 4 is pasted on the steel pipe segment B, the waterproof mortar plug 3 and the waterproof board 12 to ensure the waterproof effect.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A drainage device for shield tunnels, characterized in that: include: A drainage system, the drainage system comprising a water collecting ditch (21), a limiting sleeve and a drainage pipe (22); The water collecting ditch (21) is arranged on the steel pipe segments (B) on both sides of the tunnel roadbed (A); the limiting sleeve is tilted and fixed on the steel pipe segments (B) of the tunnel; the slope of the limiting sleeve is ≥1%; one end of the drainage pipe (22) penetrates into the limiting sleeve and is fixedly connected to the limiting sleeve; the drainage pipe (22) is communicated with the water collecting ditch (21).

2. The anti-drainage device for shield tunnel according to claim 1, characterized in that: It also includes a fixing bolt (25), and the limiting sleeve includes a main pipe (23) and a flange part (24), one end of the main pipe (23) is welded to the steel pipe segment (B), and the other end of the main pipe (23) is welded to the flange part (24), and the flange part (24) is connected to the steel pipe segment (B) through the fixing bolt (25).

3. The anti-drainage device for shield tunnel according to claim 2, characterized in that: It also includes a rubber sleeve (26), which is sleeved on the fixing bolt (25), and the outer wall of the rubber sleeve (26) abuts against the main pipe (23).

4. The anti-drainage device for shield tunnel according to claim 1, characterized in that: The slope of the limiting sleeve is ≤3%.

5. The anti-drainage device for shield tunnel according to claim 1, characterized in that: The invention also comprises a waterproof layer, wherein the waterproof layer comprises a buffer layer (11) and a waterproof board (12), wherein the waterproof board (12) is arranged between the primary support (C) and the secondary lining (D) of the tunnel, and the buffer layer (11) is arranged on a side of the waterproof board (12) close to the primary support (C).

6. The anti-drainage device for shield tunnel according to claim 5, characterized in that: It also comprises cement nails (14) for edge sealing, the waterproof board (12) and the buffer layer (11) are fixed on the initial support (C) by means of the cement nails (14) for edge sealing, and a metal pressure strip (13) is arranged between the tail of the cement nails (14) for edge sealing and the waterproof board (12).

7. The anti-drainage device for shield tunnel according to claim 5, characterized in that: It also includes cement nails (17) for fixing, and the buffer layer (11) is fixed on the initial support (C) by the cement nails (17) for fixing; A connecting piece (15) is provided on one side of the waterproof board (12) close to the buffer layer (11); the connecting piece (15) is thermally welded to the waterproof board (12); the connecting piece (15) is arranged on the buffer layer (11) via a fixing cement nail (17); a metal gasket (16) is provided between the tail of the fixing cement nail (17) and the connecting piece (15).

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