Longitudinal communication type shield tunnel drainage device

Abstract

The utility model discloses a longitudinal communication type shield tunnel drainage device which comprises a pipe piece lining formed by connecting a plurality of pipe pieces, a connecting hole is formed in the position, close to one side, of each pipe piece, a threaded rod of a connecting bolt sequentially penetrates through the connecting holes of every two adjacent pipe pieces, and an annular drainage pipe is arranged on the circumferential inner wall of each pipe piece lining. Axial drainage holes are formed in the pipe pieces, the two ends of the pipe pieces penetrate through the middles of the axial drainage holes in the two sides of the pipe pieces correspondingly to be communicated and connected with the grouting holes in a crossed mode, the axial drainage holes of the two axially adjacent pipe pieces are communicated with the connecting holes correspondingly, and bolt through holes are formed in the positions, corresponding to the axial drainage holes, of threaded rods of the connecting bolts. And the two ends of the bolt through hole are respectively communicated and connected with the two adjacent axial drainage holes. According to the utility model, the strength of the duct piece, the whole duct piece lining and the shield tunnel is basically not influenced, the number of pipelines in the tunnel is reduced, the work amount is reduced, and the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a shield tunnel drainage device, in particular to a longitudinally connected shield tunnel drainage device. 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 connected longitudinally (also axially) 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 segments to drain water, which has the following defects: on the one hand, the annular drainage holes penetrate the length direction of the segments, thereby reducing the strength of the entire segment lining and shield tunnel; on the other hand, each segment ring has independent annular drainage holes, which need to be connected to the drainage ditch through an outlet pipe, which will increase the number of pipes in the tunnel, increase the engineering workload, and reduce efficiency; in addition, because the connecting bolts pass through the corresponding positions of the annular drainage holes with respect to the two adjacent segments, it is necessary to use a connecting pipe 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 longitudinally connected shield tunnel drainage device which does not require annular drainage holes to be arranged in the pipe segments in order to solve the above-mentioned problem.

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

[0007] A longitudinally connected shield tunnel drainage device, comprising a tubular segment lining formed by connecting a plurality of segments, wherein a plurality of segments connected to each other on the same circular ring constitute a segment ring, wherein a plurality of segment rings are axially connected to form the segment lining, wherein the axial direction of the segment lining is transverse, wherein two axially adjacent segments of the segment lining are connected by oblique connecting bolts, wherein an oblique connecting hole is provided at a position close to one side of the segment, wherein the screw of the connecting bolt passes through the connecting holes of two adjacent segments in sequence, wherein a radial grouting hole is provided in the middle of the segment, and wherein the segment lining is provided with a plurality of segments connected to each other in a longitudinally connected manner. A circular drainage pipe is provided on the circumferential inner wall, and the drainage pipe is communicated with the grouting hole. An axial drainage hole parallel to the axial direction of the segment liner is provided in the segment, and two ends respectively penetrate the middle parts of the axial drainage holes on both sides of the segment and are communicated with the grouting hole and cross-connected. The axial drainage holes of two axially adjacent segments of the segment liner are respectively communicated with the corresponding connecting holes, and a bolt through hole is provided on the screw rod of the connecting bolt at a position corresponding to the axial drainage hole, and the two ends of the bolt through hole are respectively communicated with the two adjacent axial drainage holes.

[0008] Preferably, in order to avoid blockage of the grouting holes during installation and the entry of slurry during external grouting and to avoid water entering the segment lining, a section of the grouting hole located between the axial drainage hole and the corresponding inner wall of the segment is installed with a blockage, and a section of the grouting hole located between the axial drainage hole and the corresponding outer wall of the segment is filled with a water-soluble discrete material; or, one end of the grouting hole close to the outer wall of the segment is closed.

[0009] Preferably, in order to ensure that the bolt through hole is connected with the axial drainage hole after the connecting bolt is rotated and locked, there are three bolt through holes on the connecting bolt, and the middle parts of the three bolt through holes evenly distributed in the circumferential direction are cross-connected with each other, and the two ends of one of the bolt through holes are respectively connected with the two adjacent axial drainage holes.

[0010] Preferably, in order to achieve reliable drainage, the lower and middle part of the drainage pipe is connected to one end of the outlet pipe and a valve is installed at this end of the outlet pipe, and the other end of the outlet pipe is placed in the drainage ditch on one side of the bottom platform in the shield tunnel.

[0011] 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.

[0012] 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.

[0013] The beneficial effects of the utility model are:

[0014] The utility model arranges a drainage pipe outside the inner wall of the pipe segment, arranges an axial drainage hole connected with the grouting hole in the pipe segment, and arranges bolt through holes on the connecting bolts, so that groundwater outside a plurality of pipe segment rings is introduced into the drainage pipe through the grouting hole and the axial drainage hole for discharge, and there is no need to arrange annular drainage holes 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, and a longitudinal (i.e., the axial direction of the pipe segment lining, the pipe segment ring, and the pipe segment, and the tunnel is often represented by the longitudinal direction) drainage channel is formed between the plurality of pipe segment rings, and the plurality of pipe segment rings can share a drainage pipe, which reduces the number of pipes in the tunnel, reduces the engineering workload, and improves efficiency; in addition, there is no need to arrange additional connecting pipes at the bolt positions between the adjacent pipe segments in the circumferential direction, so that the strength of the entire pipe segment lining and the shield tunnel is better guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of one section of the longitudinally connected shield tunnel drainage device of the utility model before assembly;

[0016] Figure 2 It is a schematic diagram of the axial connection cross-sectional structure of two axially adjacent segments in the longitudinally connected shield tunnel drainage device of the utility model, and the figure shows the structure before drainage application;

[0017] Figure 3 This is a three-dimensional structural diagram of the connecting bolts of the longitudinally connected shield tunnel drainage device of the utility model, and the proportion of the figure is larger than Figure 1 ;

[0018] Figure 4 It is a schematic diagram of the axially connected cross-sectional structure of two axially adjacent pipe segments in the longitudinally connected shield tunnel drainage device described in the utility model, and the figure shows the structure in drainage application. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings:

[0020] like Figure 1-Figure 4 As shown, the longitudinally connected shield tunnel drainage device of the utility model comprises a tubular segment liner (i.e. Figure 1 The entire annular tube structure (not marked in the figure), multiple segments connected to each other on the same annular ring constitute a segment ring (individually marked in the figure, Figure 1Two segment rings are shown in the figure, and a plurality of segment rings are connected axially (also axially of the segment lining and longitudinally of the tunnel) to form the segment lining. The axial direction of the segment lining is transverse, and two axially adjacent segments 1 of the segment lining are connected by oblique connecting bolts 5. An oblique connecting hole 4 is provided near one side of the segment 1, and the screw of the connecting bolt 5 passes through the connecting holes 4 of two adjacent segments 1 in sequence. A radial grouting hole 3 is provided in the middle of the segment 1, and a circular drainage pipe 7 is provided on the circumferential inner wall of the segment lining, and the drainage pipe 7 is connected to the grouting hole 3. The pipe segment 1 is provided with an axial drainage hole 2 which is parallel to the axial direction of the pipe segment liner, and the two ends respectively penetrate the middle parts of the axial drainage holes 2 on both sides of the pipe segment 1 and are cross-connected with the grouting holes 3. The axial drainage holes 2 of two axially adjacent pipe segments 1 in the pipe segment liner are respectively connected with the corresponding connecting holes 4, and a bolt through hole 6 is provided on the screw rod of the connecting bolt 5 at a position corresponding to the axial drainage hole 2. The two ends of the bolt through hole 6 are respectively connected with the two adjacent axial drainage holes 2, and the axial direction of the bolt through hole 6 and the axial direction of the screw rod of the connecting bolt 5 have an angle of 30°-60°.

[0021] like Figure 1-Figure 4 As shown, the utility model also discloses the following more optimized specific structures:

[0022] In order to avoid clogging of the grouting hole 3 during installation and the entry of slurry during external grouting and to avoid water entering the pipe segment lining, a section of the grouting hole 3 located between the axial drainage hole 2 and the inner wall of the corresponding pipe segment 1 is installed with a plug 9, and a section of the grouting hole 3 located between the axial drainage hole 2 and the outer wall of the corresponding pipe segment 1 is filled with a water-soluble discrete material 8; or, as needed, one end of the grouting hole 3 close to the outer wall of the corresponding pipe segment 1 can be closed first, and then the grouting hole 3 can be pierced from the inside out before drainage application, and the grouting hole 3 not connected to the drainage pipe 7 is installed with a plug 9.

[0023] In order to ensure that the bolt through hole 6 of the connecting bolt 5 is connected with the axial drainage hole 2 after being rotated and locked, there are three bolt through holes 6 on the connecting bolt 5, and the middle parts of the three bolt through holes 6 evenly distributed in the circumferential direction are cross-connected with each other, and the two ends of one bolt through hole 6 are respectively connected with two adjacent axial drainage holes 2.

[0024] In order to achieve reliable drainage, the middle and lower part of the drain pipe 7 is connected to one end of the outlet pipe (not shown in the figure) and a valve (not shown in the figure) is installed at the end of the outlet pipe, and the other end of the outlet pipe is placed in a drainage ditch (not shown in the figure) on one side of the bottom platform in the shield tunnel; in order to facilitate sufficient drainage, the two sides of the middle and lower part of the drain pipe 7 are connected to one end of the two outlet pipes respectively; in order to achieve the automatic drainage function, the valve is an adaptive valve and the valve can automatically open when the water pressure is higher than the threshold and automatically close when it is lower than the threshold. The above structure is not shown in the figure, and you can directly refer to the structure between the drain pipe, outlet pipe, valve, and drainage ditch in the utility model patent with patent number "ZL 202322211205.1" and name "Shield tunnel drainage device based on segment annular drainage".

[0025] like Figure 1-Figure 4 As shown, when used, after the tunnel enters the operation period and before drainage is required, the plug 9 in the grouting hole 3 of the pipe segment 1 that needs to be connected to the drainage pipe 7 is removed, and the water-soluble discrete material 8 is dissolved by water injection, or the water-soluble discrete material 8 is directly dissolved by groundwater during drainage, and then the drainage pipe 7 and the outlet pipe are assembled and connected, and the original groundwater on the outer side of the pipe segment lining passes through the slurry layer 10 after the slurry solidifies and then enters the multiple pipe segments 1 through multiple grouting holes 3. Through the axial drainage holes 2 and the bolt through holes 6, the groundwater corresponding to the multiple pipe segment rings can be collected in the pipe segment ring equipped with the drainage pipe 7 and enter the drainage pipe 7 through the corresponding grouting holes 3, and then discharged into the drainage ditch through the outlet pipe. When the water pressure of the valve reaches the threshold, the valve 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 longitudinally connected shield tunnel drainage device, comprising a tubular segment liner formed by connecting a plurality of segments, wherein a plurality of segments connected to each other on the same circular ring constitute a segment ring, wherein a plurality of segment rings are axially connected to form the segment liner, wherein the axial direction of the segment liner is transverse, wherein two axially adjacent segments of the segment liner are connected by oblique connecting bolts, wherein an oblique connecting hole is provided at a position close to one side of the segment, wherein the screw of the connecting bolt passes through the connecting holes of two adjacent segments in sequence, and wherein a radial grouting hole is provided in the middle of the segment, wherein the radial grouting hole is provided, wherein the radial grouting hole is provided in the middle of the segment, wherein the radial grouting hole is provided in the middle of the segment, wherein the radial grouting hole is provided in the middle of the segment, and ... A circular drainage pipe is provided on the circumferential inner wall of the segment lining, and the drainage pipe is communicated with the grouting hole. An axial drainage hole parallel to the axial direction of the segment lining is provided in the segment, and both ends respectively penetrate through the middle of the axial drainage holes on both sides of the segment and are cross-connected with the grouting hole. The axial drainage holes of two axially adjacent segments of the segment lining are respectively communicated with the corresponding connecting holes. A bolt through hole is provided at a position corresponding to the axial drainage hole on the screw rod of the connecting bolt, and both ends of the bolt through hole are respectively communicated with the two adjacent axial drainage holes.

2. The longitudinally connected shield tunnel drainage device according to claim 1 is characterized in that: A section of the grouting hole located between the axial drainage hole and the corresponding inner wall of the pipe segment is installed with a plug, and a section of the grouting hole located between the axial drainage hole and the corresponding outer wall of the pipe segment is filled with a water-soluble discrete material; or, one end of the grouting hole close to the outer wall of the pipe segment is closed.

3. The longitudinally connected shield tunnel drainage device according to claim 1 or 2, characterized in that: There are three bolt through holes on the connecting bolt, and the middle parts of the three bolt through holes evenly distributed in the circumferential direction are cross-connected with each other, and the two ends of one of the bolt through holes are respectively connected to the two adjacent axial drainage holes.

4. The longitudinally connected shield tunnel drainage device according to claim 1 or 2, characterized in that: The middle and lower part of the drainage pipe is connected to one end of the outlet pipe and a valve is installed at the end of the outlet pipe. The other end of the outlet pipe is placed in a drainage ditch on one side of the bottom platform in the shield tunnel.

5. The longitudinally connected shield tunnel drainage device according to claim 4 is 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.

6. The longitudinally connected shield tunnel drainage device according to claim 4 is 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.

Images