A shield tunnel inverted arch filling water seepage treatment structure

Abstract

The utility model relates to tunnel construction technical field, concretely is a kind of shield tunnel inverted arch filling water seepage treatment structure: including inverted arch filling surface, the water ditch body is provided at inverted arch filling surface both sides, expansion bolt is installed in the one side of water ditch body, the surface of expansion bolt is connected with mounting plate on perforation, the surface of mounting plate is connected with drain pipe on perforation, the surface of drain pipe is provided with filter mechanism, the filter mechanism includes fixed nut.The utility model when non-woven fabric occurs block, in the top of fixed nut rotation support screw head, support screw head is rotated out the top of drain pipe, support screw head is pulled out drain pipe interior by support rod with connecting cross bar and inner sleeve, non-woven fabric is taken out drain pipe interior by inner sleeve, to carry out maintenance operation to non-woven fabric in the bottom of drain pipe conveniently, reduce the cost and time of maintenance.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically to a structure for treating seepage in the invert arch of a shield tunnel. Background Technology

[0002] The seepage treatment structure for shield tunnel invert filling is a series of structural systems designed to treat and prevent seepage problems in the invert filling part of shield tunnels. The invert filling is an important part of the bottom of the shield tunnel. It not only supports the tunnel structure, but also provides a flat foundation for facilities such as tracks and pipelines inside the tunnel.

[0003] Chinese utility model patent application number CN202123279075.2 describes a seepage treatment system for the invert arch filling surface of a single-line tunnel. This system involves drilling pressure-reducing holes at the bottom of a ditch on one side of the invert arch filling surface, reasonably deepening the drilling depth to exceed the bottom of the tunnel invert arch by 50cm, thus reducing the seepage pressure at the seepage location on the filling surface. During drilling, adjacent initial masonry circumferential construction joints are staggered, and a distance greater than 1m is maintained between the drilling and the initial masonry circumferential construction joints of the trench to avoid damaging the waterstop structure at the construction joint location and disrupting the trench structure. A PVC drainage pipe is installed inside the pressure-reducing hole, with the bottom end of the drainage pipe wrapped in non-woven fabric for drainage and filtration. However, during long-term filtration, a large amount of particulate matter accumulates on the non-woven fabric, causing poor drainage of the PVC drainage pipe. Furthermore, the non-woven fabric wrapping at the bottom of the PVC drainage pipe makes maintenance very inconvenient, significantly increasing maintenance costs and time. Utility Model Content

[0004] The purpose of this utility model is to provide a seepage treatment structure for shield tunnel invert filling, in order to solve the problem mentioned in the background art that the existing shield tunnel invert filling seepage treatment structure has inconvenient maintenance of the non-woven fabric at the bottom of the PVC drainage pipe for treating seepage, which greatly increases the cost and time of maintenance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a structure for treating seepage in the invert filling of a shield tunnel: It includes an invert filling surface, with drainage ditch bodies on both sides of the filling surface, a drainage ditch cover plate on the top of the drainage ditch body, an expansion bolt installed on one side of the drainage ditch body, a mounting plate perforated on the surface of the expansion bolt, a limit nut threadedly connected to the surface of the expansion bolt, a drainage pipe perforated on the surface of the mounting plate, a drainage outlet on the surface of the drainage pipe, a positioning block fixedly connected to the surface of the drainage pipe, a limit bolt threadedly connected to the surface of the positioning block, a filtering mechanism on the surface of the drainage pipe, the filtering mechanism including a fixing nut fixedly connected to the top of the drainage pipe, a support screw head threadedly connected to the surface of the fixing nut, a support rod fixedly connected to the bottom of the support screw head, a connecting crossbar fixedly connected to the bottom of the support rod, an inner sleeve fixedly connected to the surface of the connecting crossbar, a sealing rubber ring fixedly connected to the surface of the inner sleeve, and non-woven fabric wrapped around the bottom of the inner sleeve.

[0006] Preferably, a pressure-reducing hole is formed on the surface of the invert arch filling surface, the drain pipe passes through the pressure-reducing hole of the invert arch filling surface, and epoxy mortar is injected at the joint between the drain pipe and the pressure-reducing hole of the invert arch filling surface, and epoxy resin is coated on the upper surface of the epoxy mortar.

[0007] Preferably, the support screw head is threadedly connected to the top of the drain pipe by a fixing nut, the support screw head is supported by a support rod at the top of the drain pipe, and the bottom of the support rod extends to the bottom of the drain pipe.

[0008] Preferably, four sets of connecting crossbars are provided, and the support rod supports the inner sleeve through the four sets of connecting crossbars. The outer diameter of the inner sleeve is smaller than the inner diameter of the drain pipe.

[0009] Preferably, the inner sleeve and the drain pipe are sealed by compression with a sealing rubber ring, and the gap between the drain pipe and the inner sleeve is reserved for the non-woven fabric to wrap around the outer ring of the inner sleeve.

[0010] Preferably, the mounting plate is in an "L" shape, and the limiting nut, together with the expansion bolt, installs the mounting plate on the side wall of the ditch body. The mounting plate supports the drain pipe through the fixing nut.

[0011] Preferably, the positioning block has a threaded groove on its surface, the mounting plate passes through the side of the mounting plate and is threadedly connected to the threaded groove of the positioning block, and the limiting bolt restricts the position of the drain pipe on the mounting plate through the positioning block.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. In this seepage treatment structure, when the non-woven fabric becomes clogged, the support screw head is rotated at the top of the fixing nut to rotate the support screw head out of the top of the drain pipe. The support screw head pulls the connecting crossbar and inner sleeve out of the drain pipe through the support rod. The inner sleeve brings the non-woven fabric out of the drain pipe, which facilitates maintenance of the non-woven fabric at the bottom of the drain pipe and reduces maintenance costs and time.

[0014] 2. This seepage treatment structure involves installing expansion bolts on the side wall of the ditch body, and then using upper limit nuts to install the mounting plate on the side wall of the ditch body. The drain pipe passes through the circular hole of the mounting plate, and the mounting plate supports the drain pipe with fixing nuts. The mounting plate is threaded through the side of the mounting plate and the threaded groove of the positioning block. The limit bolts restrict the position of the drain pipe on the mounting plate through the positioning block, thus completing the installation of the drain pipe inside the ditch body. The drain pipe also passes through the pressure reduction hole of the invert arch filling surface. Epoxy mortar is injected at the joint between the invert arch filling surface and the pressure reduction hole of the drain pipe. The upper surface of the epoxy mortar is coated with epoxy resin to ensure the sealing between the drain pipe and the invert arch filling surface, making the installation of the drain pipe more convenient and improving the stability of the drain pipe in use. Attached Figure Description

[0015] Figure 1 This is a frontal cross-sectional view of the overall structure of this utility model;

[0016] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A;

[0017] Figure 3 This is a three-dimensional exploded view of the top structure of the drainage pipe of this utility model, including frontal view, bottom view, cross-sectional view, and perspective view.

[0018] Figure 4 This is a front sectional view of the bottom structure of the drainage pipe of this utility model;

[0019] Figure 5 This is a three-dimensional schematic diagram of the inner sleeve structure of this utility model, viewed from the front and from below.

[0020] In the diagram: 1. Invert arch filling surface; 11. Drainage ditch body; 12. Drainage ditch cover; 2. Expansion bolt; 21. Mounting plate; 22. Limiting nut; 23. Drainage pipe; 24. Drainage outlet; 25. Positioning block; 26. Limiting bolt; 3. Fixing nut; 31. Support screw head; 32. Support rod; 33. Connecting crossbar; 34. Inner sleeve; 35. Sealing rubber ring; 36. Non-woven fabric. Detailed Implementation

[0021] Please see Figure 1-5 One embodiment provided by this utility model:

[0022] A structure for treating seepage in the invert filling of a shield tunnel includes an invert filling surface 1, drainage ditch bodies 11 on both sides of the invert filling surface 1, a drainage ditch cover 12 on the top of the drainage ditch body 11, an expansion bolt 2 installed on one side of the drainage ditch body 11, a mounting plate 21 perforated and connected to the surface of the expansion bolt 2, a limit nut 22 threadedly connected to the surface of the expansion bolt 2, a drainage pipe 23 perforated and connected to the surface of the mounting plate 21, a drainage outlet 24 opened on the surface of the drainage pipe 23, a positioning block 25 fixedly connected to the surface of the drainage pipe 23, a limit bolt 26 threadedly connected to the surface of the positioning block 25, and a filter mechanism provided on the surface of the drainage pipe 23, the filter mechanism including a fixed... Nut 3 is fixedly connected to the top of drain pipe 23. A support screw head 31 is threaded onto the surface of the fixing nut 3. A support rod 32 is fixedly connected to the bottom of the support screw head 31. A connecting crossbar 33 is fixedly connected to the bottom of the support rod 32. An inner sleeve 34 is fixedly connected to the surface of the connecting crossbar 33. A sealing rubber ring 35 is fixedly connected to the surface of the inner sleeve 34. The bottom of the inner sleeve 34 is wrapped with non-woven fabric 36. This seepage treatment structure improves the filtration layer of drain pipe 23, allowing the non-woven fabric 36 at the bottom of drain pipe 23 to be directly removed from inside drain pipe 23, thus facilitating maintenance of non-woven fabric 36 and reducing maintenance costs and time.

[0023] Furthermore, a pressure-reducing hole is provided on the surface of the invert arch filling surface 1, and the drain pipe 23 passes through the pressure-reducing hole of the invert arch filling surface 1. Epoxy mortar is injected at the joint between the drain pipe 23 and the pressure-reducing hole of the invert arch filling surface 1, and epoxy resin is coated on the upper surface of the epoxy mortar to ensure the sealing between the drain pipe 23 and the invert arch filling surface 1.

[0024] Furthermore, the support screw head 31 is threadedly connected to the top of the drain pipe 23 via the fixing nut 3. The support screw head 31 is supported by the support rod 32 at the top of the drain pipe 23, and the bottom of the support rod 32 extends to the bottom of the drain pipe 23. When the threaded connection of the support screw head 31 to the fixing nut 3 is removed, the support rod 32 can be completely removed from the inside of the drain pipe 23, thereby allowing the non-woven fabric 36 at the bottom of the support rod 32 to be removed for maintenance.

[0025] Furthermore, four sets of connecting crossbars 33 are provided, and the support rod 32 supports the inner sleeve 34 through the four sets of connecting crossbars 33, ensuring stable support of the inner sleeve 34 inside the drain pipe 23. The outer diameter of the inner sleeve 34 is smaller than the inner diameter of the drain pipe 23. Under the obstruction of the sealing rubber ring 35, all water will pass through the inside of the inner sleeve 34.

[0026] Furthermore, the inner sleeve 34 and the drain pipe 23 are sealed by a sealing rubber ring 35 to prevent water from flowing between the drain pipe 23 and the inner sleeve 34, ensuring that all seepage water is filtered through the non-woven fabric 36. The gap between the drain pipe 23 and the inner sleeve 34 provides space for the non-woven fabric 36 to be wrapped around the outer ring of the inner sleeve 34, making it convenient to wrap the non-woven fabric 36 around the bottom of the inner sleeve 34. After removing the inner sleeve 34, it is convenient to maintain the non-woven fabric 36.

[0027] Furthermore, the mounting plate 21 is in an "L" shape. The limiting nut 22, together with the expansion bolt 2, installs the mounting plate 21 on the side wall of the water ditch body 11. The mounting plate 21 supports the drain pipe 23 through the fixing nut 3. The surface of the mounting plate 21 has a circular hole that matches the outer diameter of the drain pipe 23, which facilitates the support of the drain pipe 23 and the installation of the drain pipe 23.

[0028] Furthermore, a threaded groove is provided on the surface of the positioning block 25. The mounting plate 21 passes through the side of the mounting plate 21 and is threadedly connected to the threaded groove of the positioning block 25. The limiting bolt 26 restricts the position of the drain pipe 23 on the mounting plate 21 through the positioning block 25, thereby completing the installation of the drain pipe 23 inside the water ditch body 11. Compared with the clamp installation, this installation method is simple and more stable.

[0029] Working principle: The drainage pipe 23 is used to treat seepage through the pressure reduction hole of the invert arch filling surface 1 and to filter it with non-woven fabric 36. When the non-woven fabric 36 is blocked, the support screw head 31 is rotated on the top of the fixing nut 3, and the support screw head 31 is rotated out of the top of the drainage pipe 23. The support screw head 31 pulls the connecting crossbar 33 and the inner sleeve 34 out of the drainage pipe 23 through the support rod 32. The inner sleeve 34 brings the non-woven fabric 36 out of the drainage pipe 23, which facilitates the maintenance of the non-woven fabric 36 at the bottom of the drainage pipe 23 and reduces the cost and time of maintenance.

[0030] Expansion bolts 2 are installed on the side wall of the ditch body 11, and then the mounting plate 21 is installed on the side wall of the ditch body 11 with the upper limit nut 22. The drain pipe 23 is passed through the circular hole of the mounting plate 21. The mounting plate 21 supports the drain pipe 23 by fixing nut 3. The mounting plate 21 is threaded through the side of the mounting plate 21 and the threaded groove of the positioning block 25. The limit bolt 26 restricts the position of the drain pipe 23 on the mounting plate 21 through the positioning block 25, thus completing the installation of the drain pipe 23 inside the ditch body 11. The drain pipe 23 also passes through the pressure reduction hole of the invert arch filling surface 1. Epoxy mortar is injected at the joint between the invert arch filling surface 1 and the pressure reduction hole of the drain pipe 23. The upper surface of the epoxy mortar is coated with epoxy resin to ensure the sealing between the drain pipe 23 and the invert arch filling surface 1, making the installation of the drain pipe 23 more convenient and improving the stability of the drain pipe 23 in use.

Claims

1. A structure for treating seepage in the invert of a shield tunnel, characterized in that: The system includes an inverted arch filling surface, with drainage ditch bodies on both sides of the inverted arch filling surface, a drainage ditch cover plate on the top of the drainage ditch body, expansion bolts installed on one side of the drainage ditch body, mounting plates connected to holes in the surface of the expansion bolts, limit nuts threaded onto the surface of the expansion bolts, drainage pipes connected to holes in the surface of the mounting plates, drainage outlets on the surface of the drainage pipes, positioning blocks fixedly connected to the surface of the drainage pipes, limit bolts threaded onto the surface of the positioning blocks, and a filtering mechanism on the surface of the drainage pipes. The filtering mechanism includes a fixing nut fixedly connected to the top of the drainage pipe, a support screw head threadedly connected to the surface of the fixing nut, a support rod fixedly connected to the bottom of the support screw head, a connecting crossbar fixedly connected to the bottom of the support rod, an inner sleeve fixedly connected to the surface of the connecting crossbar, a sealing rubber ring fixedly connected to the surface of the inner sleeve, and non-woven fabric wrapped around the bottom of the inner sleeve.

2. The seepage treatment structure for filling the invert arch of a shield tunnel according to claim 1, characterized in that: Pressure-reducing holes are provided on the surface of the invert arch filling surface. The drainage pipe passes through the pressure-reducing holes of the invert arch filling surface, and epoxy mortar is injected at the joint between the drainage pipe and the pressure-reducing holes of the invert arch filling surface. Epoxy resin is coated on the upper surface of the epoxy mortar.

3. The seepage treatment structure for the invert of a shield tunnel according to claim 1, characterized in that: The support screw head is threadedly connected to the top of the drain pipe by a fixing nut. The support screw head is supported by a support rod at the top of the drain pipe, and the bottom of the support rod extends to the bottom of the drain pipe.

4. The seepage treatment structure for the invert of a shield tunnel according to claim 3, characterized in that: The connecting crossbars are provided in four sets, and the support rod supports the inner sleeve through the four sets of connecting crossbars. The outer diameter of the inner sleeve is smaller than the inner diameter of the drain pipe.

5. The seepage treatment structure for filling the invert arch of a shield tunnel according to claim 4, characterized in that: The inner sleeve and the drain pipe are sealed by a sealing rubber ring, and the gap between the drain pipe and the inner sleeve is reserved for the non-woven fabric to wrap around the outer ring of the inner sleeve.

6. The seepage treatment structure for filling the invert arch of a shield tunnel according to claim 1, characterized in that: The mounting plate is generally L-shaped. The limiting nut, together with the expansion bolt, installs the mounting plate on the side wall of the water ditch body. The mounting plate supports the drain pipe through the fixing nut.

7. A seepage treatment structure for filling the invert arch of a shield tunnel according to claim 6, characterized in that: The positioning block has a threaded groove on its surface. The mounting plate passes through the side of the mounting plate and is threadedly connected to the threaded groove of the positioning block. The limiting bolt restricts the position of the drain pipe on the mounting plate through the positioning block.

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