Shield tunnel drainage device based on hollow bolt drainage

Abstract

The utility model discloses a shield tunnel drainage device based on hollow bolt drainage, which comprises a duct piece lining formed by connecting a plurality of duct pieces, two adjacent duct pieces are connected through a connecting bolt, an inclined connecting hole is arranged on the duct piece close to the end part, a screw rod of the connecting bolt sequentially penetrates through the connecting holes of the two adjacent duct pieces, and the hollow bolt is arranged on the duct piece lining. An annular drainage pipe is arranged on the circumferential inner wall of the pipe piece lining, the lower middle portion of the drainage pipe is communicated with one end of a water outlet pipe, a valve is installed at the end of the water outlet pipe, and the other end of the water outlet pipe is arranged in a drainage ditch on one side of a bottom platform in the shield tunnel. The end, close to the drainage pipe, of the bolt center through hole communicates with the drainage pipe through a connecting pipe. The drainage device is favorable for ensuring that the strength of the duct piece, the whole duct piece lining and the shield tunnel is basically not influenced, and meanwhile, the structure of the whole drainage device is simplified, so that the strength is better guaranteed.

Description

Technical Field

[0001] The utility model relates to a shield tunnel drainage device, in particular to a shield tunnel drainage device based on hollow bolt drainage. Background Art

[0002] When constructing a shield tunnel in a water-rich stratum, it is usually necessary to use continuous drainage to reduce the hydrostatic pressure on the structure and ensure the safety of the shield tunnel structure. Reasonable drainage volume and drainage rate play an important role in the balance of the original stratum water system and ecological stability. Too small drainage volume will result in the inability to effectively reduce the hydrostatic pressure of the structure, while too large drainage volume will cause serious soil erosion in the rock strata around the tunnel, affecting the self-balancing ability of the structure. Therefore, the drainage concept of "water blocking and drainage limitation" has been widely used because it can maximize the safety of the structure while reducing the impact on the surrounding environment.

[0003] As the main body of the shield tunnel, the segment lining is composed of multiple segments connected to each other. Multiple segments connected to each other on the same ring constitute a segment ring. Multiple segment rings are axially connected to form a segment lining. The segment lining is buried deep under the stratum. In addition to bearing the large stratum pressure, it also needs to bear the full pressure of groundwater. If the shield tunnel drainage system is not designed, the large static water pressure borne by the segment lining is converted into a smaller water flow pressure, and the segment strength and thickness are only blindly increased, which will only greatly increase the project cost and construction difficulty, and increase the design difficulty and use danger. Therefore, it is very necessary to design a reasonable shield tunnel drainage device.

[0004] Traditional shield tunnel drainage devices, such as the utility model patent with patent number "ZL 202322211205.1" and the name "Shield tunnel drainage device based on segment annular drainage", use annular drainage holes and radial drainage holes in the segment to drain water, which has the following defects: on the one hand, the annular drainage holes penetrate the length direction of the segment, thereby reducing the strength of the entire segment lining and shield tunnel; on the other hand, because the connecting bolts pass through the corresponding positions of the two adjacent segments in the annular drainage holes, it is necessary to use connecting pipes to bypass the connecting bolts, which increases the complexity of the segment connection structure and further reduces the strength of the entire segment lining and shield tunnel. Utility Model Content

[0005] The purpose of the utility model is to provide a shield tunnel drainage device based on hollow bolt drainage, which has a simple structure and does not substantially reduce the strength of the entire segment lining and the shield tunnel, in order to solve the above-mentioned problem.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0007] A shield tunnel drainage device based on hollow bolt drainage, comprising a tubular segment liner formed by connecting a plurality of segments, the axial direction of the segment liner being horizontal, two adjacent segments in the circumferential direction of the segment liner being connected by oblique connecting bolts, an oblique connecting hole being provided near the end of the segment, the screw of the connecting bolt passes through the connecting holes of two adjacent segments in sequence, a circular drainage pipe being provided on the circumferential inner wall of the segment liner, the middle and lower part of the drainage pipe being communicated and connected with one end of a water outlet pipe and a valve being installed at the end of the water outlet pipe, the other end of the water outlet pipe being placed in a drainage ditch on one side of a bottom platform in the shield tunnel, the connecting bolt being provided with an axially penetrating bolt center through hole, the end of the bolt center through hole close to the drainage pipe being communicated and connected with the drainage pipe through a connecting pipe.

[0008] Preferably, in order to facilitate the installation of the connecting bolt and its nut, the nut of the connecting bolt is close to the drain pipe and the screw end of the connecting bolt is away from the drain pipe. In the two adjacent pipe segments connected by the same connecting bolt, a nut mounting hole is provided on the pipe segment corresponding to the nut of the connecting bolt, close to its inner wall. The nut mounting hole extends to the inner wall surface of the corresponding pipe segment and is open. The aperture of the nut mounting hole is larger than the aperture of the connecting hole. The nut of the connecting bolt and the connecting pipe are both placed in the corresponding nut mounting hole.

[0009] Preferably, in order to facilitate waterproofing during installation and drainage after installation, the end of the connecting hole of the other one of the two adjacent pipe segments connected by the same connecting bolt, which is away from the drain pipe, is closed and a sealing gasket is installed at the closed end; or, the end of the connecting hole of the other one of the two adjacent pipe segments connected by the same connecting bolt, which is away from the drain pipe, extends to the outer wall surface of the pipe segment and is open, and a sealing plug is installed in the opening.

[0010] Preferably, in order to facilitate sufficient drainage, both sides of the middle and lower part of the drainage pipe are respectively connected to one end of the two water outlet pipes.

[0011] Preferably, in order to realize the automatic drainage function, the valve is an adaptive valve and the valve can automatically open when the water pressure is higher than a threshold value and automatically close when the water pressure is lower than the threshold value.

[0012] The beneficial effects of the utility model are:

[0013] The utility model arranges a drainage pipe outside the inner wall of the pipe segment and arranges a bolt center through hole on the connecting bolt, so that groundwater outside the pipe segment lining is introduced into the drainage pipe through the bolt center through hole and the connecting pipe, and then discharged through the outlet pipe. There is no need to arrange an annular drainage hole in the pipe segment, which is beneficial to ensuring that the strength of the pipe segment and the entire pipe segment lining and the shield tunnel is basically not affected. At the same time, there is no need to arrange another connecting pipe at the position of the outer periphery of the connecting bolt, which simplifies the structure of the entire drainage device and better guarantees the strength of the entire pipe segment lining and the shield tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main structure of the shield tunnel drainage device based on hollow bolt drainage according to the utility model;

[0015] Figure 2 This is a schematic diagram of the main structure of two adjacent pipe segments and corresponding drainage pipes of the shield tunnel drainage device based on hollow bolt drainage according to the utility model, and the scale of the figure is larger than Figure 1 ;

[0016] Figure 3 This is a schematic diagram of the main structure of two adjacent pipe segments and corresponding drainage pipes when the shield tunnel drainage device based on hollow bolt drainage is applied in the utility model. Figure 2 same;

[0017] Figure 4 This is a partial main structural diagram of the shield tunnel drainage device based on hollow bolt drainage in the utility model when it is used and associated with the outlet pipe. The proportion in the figure is larger than Figure 1 . DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings:

[0019] like Figure 1-Figure 4 As shown, the shield tunnel drainage device based on hollow bolt drainage of the utility model comprises a tubular segment lining (i.e. Figure 1The entire annular tube body structure is shown in the figure (not marked in the figure), the axial direction of the segment lining is horizontal, and the two adjacent segments 1 in the circumferential direction of the segment lining are connected by oblique connecting bolts (marked separately in the figure, refer to the screw 2 and nut 11 below), and an oblique connecting hole 9 is provided near the end of the segment 1. The screw 2 of the connecting bolt passes through the connecting holes 9 of two adjacent segments 1 in sequence. The circumferential inner wall of the segment lining is provided with an annular drainage pipe 3, and the middle and lower part of the drainage pipe 3 is connected to one end of the outlet pipe 5 and a valve 4 is installed at this end of the outlet pipe 5. The other end of the outlet pipe 5 is placed in the drainage ditch 6 on one side of the bottom platform 7 in the shield tunnel, and the connecting bolt is provided with an axially penetrating bolt center through hole 10, and the end of the bolt center through hole 10 close to the drainage pipe 3 is connected to the drainage pipe 3 through a connecting pipe 12.

[0020] like Figure 1-Figure 4 As shown, the utility model also discloses the following more optimized specific structures:

[0021] In order to facilitate the installation of the connecting bolt and its nut 11, the nut 11 of the connecting bolt is close to the drain pipe 3 and the end of the screw rod 2 of the connecting bolt is away from the drain pipe 3. In two adjacent pipe segments 1 connected with the same connecting bolt, a nut mounting hole 13 is provided on the pipe segment 1 corresponding to the nut 11 of the connecting bolt, close to its inner wall (which is a part of the inner wall of the pipe segment lining). The nut mounting hole 13 extends to the inner wall surface of the corresponding pipe segment 1 (which is a part of the inner wall surface of the pipe segment lining) and is open. The aperture of the nut mounting hole 13 is larger than the aperture of the connecting hole 9. The nut 11 of the connecting bolt and the connecting pipe 12 are both placed in the corresponding nut mounting hole 13.

[0022] In order to facilitate waterproofing during installation and drainage after installation, the end of the connecting hole 9 of the other pipe segment 1 of the two adjacent pipe segments 1 connected by the same connecting bolt, which is away from the drainage pipe 3, is closed and a sealing gasket 8 is installed on the closed end; or, as needed, the following structure can also be adopted: the end of the connecting hole 9 of the other pipe segment 1 of the two adjacent pipe segments 1 connected by the same connecting bolt, which is away from the drainage pipe 3, extends to the outer wall surface of the pipe segment 1 (which is a part of the outer wall surface of the pipe segment lining) and is open, and a sealing plug (not shown in the figure) is installed in the opening.

[0023] In order to facilitate sufficient drainage, both sides of the middle and lower part of the drainage pipe 3 are connected to one end of the two water outlet pipes 5 respectively.

[0024] In order to realize the automatic drainage function, the valve 4 is an adaptive valve and the valve 4 can automatically open when the water pressure is higher than the threshold value and automatically close when the water pressure is lower than the threshold value.

[0025] Combination Figure 1 , Figure 3 and Figure 4 When used, after the tunnel enters the operation period and before drainage is required, the drill bit is passed through the bolt center hole 10 of the connecting bolt to pierce the closed end of the connecting hole 9 of the corresponding pipe segment 1 to form a water diversion channel 14, and then the connecting pipe 12, the drainage pipe 3 and the outlet pipe 5 are assembled and connected. The original groundwater on the outside of the pipe segment lining enters the multiple pipe segments 1 through multiple water diversion channels 14, and then is discharged into the drainage ditch 7 through the bolt center hole 10, the connecting pipe 12, the drainage pipe 3, and the outlet pipe 5 in turn. When the water pressure of the valve 14 reaches the threshold, the valve 14 automatically opens to drain, thereby realizing automatic control of limited drainage and improving the controllability of the environment and the tunnel drainage capacity.

[0026] The above embodiments are only preferred embodiments of the present utility model and are not limitations on the technical solutions of the present utility model. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present utility model.

Claims

1. A shield tunnel drainage device based on hollow bolt drainage, comprising a tubular segment liner formed by connecting a plurality of segments, wherein the axial direction of the segment liner is transverse, and two adjacent segments in the circumferential direction of the segment liner are connected by oblique connecting bolts, and oblique connecting holes are provided near the ends of the segments, and the screws of the connecting bolts pass through the connecting holes of two adjacent segments in sequence, characterized in that: A circular drainage pipe is provided on the circumferential inner wall of the segment lining, the lower and middle part of the drainage pipe is connected to one end of a water outlet pipe and a valve is installed on the end of the water outlet pipe, the other end of the water outlet pipe is placed in a drainage ditch on one side of the bottom platform in the shield tunnel, the connecting bolt is provided with an axially penetrating bolt center through hole, and one end of the bolt center through hole close to the drainage pipe is connected to the drainage pipe through a connecting pipe.

2. The shield tunnel drainage device based on hollow bolt drainage according to claim 1 is characterized in that: The nut of the connecting bolt is close to the drain pipe and the end of the screw rod of the connecting bolt is far away from the drain pipe. In two adjacent pipe segments connected by the same connecting bolt, a nut mounting hole is provided on the pipe segment corresponding to the nut of the connecting bolt, close to its inner wall. The nut mounting hole extends to the inner wall surface of the corresponding pipe segment and is open. The aperture of the nut mounting hole is larger than the aperture of the connecting hole. The nut of the connecting bolt and the connecting pipe are both placed in the corresponding nut mounting hole.

3. The shield tunnel drainage device based on hollow bolt drainage according to claim 2 is characterized in that: The end of the connection hole of the other one of the two adjacent pipe segments connected by the same connecting bolt, which is away from the drain pipe, is closed and a sealing gasket is installed at the closed end; or, the end of the connection hole of the other one of the two adjacent pipe segments connected by the same connecting bolt, which is away from the drain pipe, extends to the outer wall surface of the pipe segment and opens, and a sealing plug is installed in the opening.

4. The shield tunnel drainage device based on hollow bolt drainage according to claim 1, 2 or 3, characterized in that: Both sides of the middle and lower part of the drainage pipe are respectively connected to one end of the two water outlet pipes.

5. The shield tunnel drainage device based on hollow bolt drainage according to claim 1, 2 or 3, characterized in that: The valve is an adaptive valve and can automatically open when the water pressure is higher than a threshold value and automatically close when the water pressure is lower than the threshold value.

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