An anti-seepage device for underground shield tunnel

Abstract

The present invention relates to the field of shield tunnels, and in particular to an anti-seepage device for an underground shield tunnel, which is used to be arranged inside the shield tunnel, and comprises a connecting ring assembly, an inner pipe and a water pressure sensor; the connecting ring assembly is arranged at equal intervals in the shield tunnel, and gates that can be opened and closed are evenly distributed on the connecting ring assembly; the inner pipe is detachably arranged between adjacent connecting ring assemblies, and the outer periphery of the inner pipe and the inner wall of the shield tunnel form a drainage cavity, and the gate is connected to the drainage cavity; the water pressure sensor is arranged on the top of the inner pipe, and the detection end of the water pressure sensor passes through the inner pipe and extends into the drainage cavity. The present application can guide the water seeping out of the shield tunnel to be discharged outward through the drainage cavity by means of the connecting ring assembly and the inner pipe that are arranged at equal intervals in the shield tunnel, and at the same time, when blockage occurs, the gates on both sides of the blockage point are closed to prevent the seeping water from affecting the cleaning operation.

Description

Technical Field

[0001] The invention relates to the field of shield tunnels, and in particular to an anti-water seepage device for an underground shield tunnel. Background Art

[0002] The shield tunnel is a tunnel space built underground in the city using a shield machine, which integrates various engineering pipelines such as electricity, communications, gas, heating, water supply and drainage. It has special inspection ports, lifting ports and monitoring systems, and implements unified planning, design, construction and management. It is an important infrastructure and "lifeline" to ensure the operation of the city.

[0003] The underground comprehensive pipe gallery with anti-seepage structure and easy installation on the market is in use. The anti-seepage structure of general comprehensive pipe gallery is not ideal, and leakage often occurs. At the same time, the internal support of the underground comprehensive pipe gallery with anti-seepage structure and easy installation on the market cannot be adjusted, which limits the use of the device.

[0004] Chinese patent CN201910424260.4 discloses a double-tube prefabricated waterproof integrated pipe gallery and an installation method, wherein the integrated pipe gallery comprises an outer pipe and an inner pipe; the outer pipe is formed by connecting a plurality of outer pipe segment assemblies in series in sequence; the outer pipe segment assemblies comprise a U-shaped concrete bottom plate and a U-shaped concrete top plate prefabricated with waterproof concrete, and the U-shaped concrete top plate and the U-shaped concrete bottom plate are butt-jointed up and down; the inner pipe is formed by connecting a plurality of prefabricated inner pipe segments prefabricated with waterproof concrete in series in sequence, and outward protrusions are provided on the top and both sides of both ends of the prefabricated inner pipe segments, forming a transverse drainage channel between the outer top and the connecting ends on both sides of the prefabricated inner pipe segments; protruding parts of the top and side walls are formed at the joints after adjacent prefabricated inner pipe segments are butt-jointed; the joint gaps between the inner pipes and the joint gaps between the outer pipes are staggered, and the joint gaps between the outer pipes are above the transverse drainage channel.

[0005] The integrated pipe gallery uses double-layer pipes to guide the seeping water to be discharged outwards. The cross-sectional area of ​​the shield pipe gallery is large, and this waterproof structure is not suitable for the shield pipe gallery. It is also very easy to get blocked, and when blocked, it is not easy to remove and clean. Summary of the invention

[0006] In view of the above problems, an underground shield tunnel anti-water seepage device is provided. A removable inner pipe is arranged in the shield tunnel to form a drainage cavity. A connecting ring assembly that can conduct and close the adjacent drainage cavities is arranged between adjacent inner pipes. This solves the problem that the existing waterproof device is difficult to install in the shield tunnel and the drainage cavity cannot be cleaned.

[0007] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0008] An underground shield tunnel anti-seepage device is used to be arranged inside the shield tunnel, comprising a connecting ring assembly, an inner pipe and a water pressure sensor; the connecting ring assembly is arranged in the shield tunnel at equal intervals, and gates that can be opened and closed are evenly distributed on the connecting ring assembly; the inner pipe is detachably arranged between adjacent connecting ring assemblies, the outer periphery of the inner pipe and the inner wall of the shield tunnel form a drainage cavity, and the gate is connected to the drainage cavity; the water pressure sensor is arranged on the top of the inner pipe, and the detection end of the water pressure sensor extends into the drainage cavity after passing through the inner pipe.

[0009] Preferably, the connecting ring assembly includes a fixed ring, a rotating ring and a toggle handle; the fixed ring is arranged in the shield tunnel at equal intervals, a coaxial mounting groove is arranged inside the fixed ring, both sides of the mounting groove are evenly provided with guide ports connected to the outside world, and a toggle arc groove is also arranged on the inner periphery of the fixed ring, and the end of the inner tube is detachably connected to the fixed ring; the rotating ring is coaxially rotatably arranged in the mounting groove, and a conducting part that can connect the guide ports on both sides, and a closing part that can close the guide ports on both sides are arranged on the rotating ring, and the guide ports form a gate that can be closed and conducted; the toggle handle passes through the toggle arc groove and is fixedly connected to the inner periphery of the rotating ring.

[0010] Preferably, the fixed ring includes a first long arc segment, a first short arc segment and a positioning arc plate; the first long arc segment and the first short arc segment each have a plurality of sections, the first long arc segment and the first short arc segment are coaxially spaced to form a first ring body, the mounting groove, the guide port and the toggle arc groove are arranged on the first ring body, and the outer peripheries of adjacent first long arc segments and the first short arc segments therebetween are also provided with mutually connected positioning grooves, the positioning arc plate is coaxially arranged in the positioning groove and fixedly connected to the inner wall of the shield tunnel; the rotating ring includes a second long arc segment and a second short arc segment, the second long arc segment and the second short arc segment are coaxially spaced to form a second ring body, the conducting portion and the closing portion are arranged on the second ring body, and the second ring body is coaxially arranged on the mounting groove.

[0011] Preferably, the inner circumference of the rotating ring is evenly distributed with semicircular grooves, and the connecting ring assembly also includes a ball and a limiting arc plate. The ball is rotatably arranged in the semicircular groove, and the limiting arc plate is coaxially arranged on the inner circumference of the rotating ring. The limiting grooves are evenly distributed on the limiting arc plate, and the outer part of the limiting arc plate passes through the limiting groove and rolls with it, and the limiting arc plate rolls with the inner circumference of the mounting groove.

[0012] Preferably, semicircular grooves coaxial with the rotating ring are arranged on both sides thereof, and the connecting ring assembly further comprises a first sealing ring, which is coaxially arranged on the semicircular groove and has an interference fit with the side wall of the accommodating groove.

[0013] Preferably, the toggle handle comprises a threaded rod and a hand-held rod, the threaded rod radially penetrates the toggle arc groove and is threadedly connected to the inner circumference of the rotating ring; the hand-held rod is radially arranged at the outer end of the threaded rod.

[0014] Preferably, the toggle handle further comprises a positioning nut, which is coaxially screwed onto the threaded rod and abuts against the inner circumference of the fixing ring.

[0015] Preferably, the connecting ring assembly also includes a second sealing ring, and both ends of the inner circumference of the fixing ring are also provided with coaxial step grooves therewith, the outer circumference of the inner tube end is coaxially and detachably arranged on the step groove, and the second sealing ring is coaxially arranged between the step groove and the outer circumference of the inner tube end.

[0016] Preferably, the inner tube comprises a plurality of arcuate segments, which are coaxially arranged to form a third ring body, which is coaxially arranged between adjacent connecting ring assemblies, and the arcuate segments are provided with grooves on both sides along their radial direction for interlocking with adjacent arcuate segments.

[0017] Preferably, the inner tube further comprises a rubber strip, which is arranged along the axis in the grooves where adjacent arc-shaped tube segments are interlocked. Compared with the prior art, the present application has the following beneficial effects:

[0018] 1. The present application can guide the water seeping out of the shield tunnel to be discharged outward through the drainage cavity by equidistantly arranged connection ring assemblies and inner tubes in the shield tunnel. At the same time, when a blockage occurs, the gates on both sides of the blockage point are closed to prevent the seeping water from affecting the cleaning operation;

[0019] 2. The present application can adapt to shield pipes with extremely large inner diameters by means of split-installed fixed rings and rotating rings, and has a stable structure and is easy to install;

[0020] 3. The present application uses a plurality of arc-shaped pipe segments to form an inner tube for connecting adjacent connecting ring assemblies, so that the staff can individually dismantle the inner tube at the blockage point to facilitate cleaning of the blockage point, thereby restoring the normal drainage function of the drainage cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a side view of the water seepage device of the present application installed in the shield pipeline;

[0022] Figure 2 yes Figure 1 A three-dimensional cross-sectional view at section AA;

[0023] Figure 3 yes Figure 1 Cross-sectional view at section AA;

[0024] Figure 4 yes Figure 3 A partial enlarged view of point B;

[0025] Figure 5 is a front view of the water seepage device of the present application;

[0026] Figure 6 yes Figure 5 A cross-sectional view at the CC section of FIG.

[0027] Figure 7 yes Figure 6 A partial enlarged view of point D;

[0028] Figure 8 yes Figure 5 A cross-sectional view at the EE section;

[0029] Fig. 9 yes Figure 8 A partial enlarged view of point F;

[0030] Fig.10 It is a stereoscopic view of the connecting ring assembly of the present application.

[0031] The numbers in the figure are:

[0032] 1-connecting ring assembly; 1h-gate; 1a-fixing ring; 1a1-receiving groove; 1a2-diversion port; 1a3-sliding arc groove; 1a4-first long arc segment; 1a5-first short arc segment; 1a6-positioning arc plate; 1a7-step groove; 1b-rotating ring; 1b1-conducting part; 1b2-closing part; 1b3-second long arc segment; 1b4-second short arc segment; 1b5-semicircular groove; 1b6-ring groove; 1c-sliding handle; 1c1-threaded rod; 1c2-handling rod; 1c3-positioning nut; 1d-ball; 1e-limiting arc plate; 1e1-limiting groove; 1f-first sealing ring; 1g-second sealing ring; 2-inner tube; 2a-arc-shaped pipe segment; 2b-rubber strip; 3-water pressure sensor. DETAILED DESCRIPTION

[0033] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] like Figure 1-10 As shown, this application provides:

[0035] An underground shield tunnel anti-seepage device, used to be arranged inside the shield tunnel, comprises a connecting ring assembly 1, an inner tube 2 and a water pressure sensor 3;

[0036] The connecting ring components 1 are arranged in the shield tunnel at equal intervals, and the connecting ring components 1 are evenly distributed with gates 1h that can be opened and closed;

[0037] The inner tube 2 is detachably arranged between adjacent connection ring assemblies 1, the outer periphery of the inner tube 2 and the inner wall of the shield tunnel form a drainage cavity, and the gate 1h is connected to the drainage cavity;

[0038] The water pressure sensor 3 is arranged on the top of the inner tube 2, and the detection end of the water pressure sensor 3 passes through the inner tube 2 and extends into the drainage cavity.

[0039] The water pressure sensor 3 is electrically connected to the monitoring center, so that the water pressure sensor 3 can send the pressure value of the drainage cavity to the monitoring center;

[0040] By coaxially arranging the connecting ring components 1 in the shield tunnel at equal intervals, and coaxially arranging the inner tube 2 between adjacent connecting ring components 1, after installation, the outer periphery of the inner tube 2 and the inner periphery of the shield tunnel form a complete and continuous drainage cavity, and the adjacent drainage cavities are connected through the conducting gate 1h. When water seepage occurs in the shield tunnel, the water gathers in the drainage cavity and cannot corrode the lines erected in the inner tube 2. At the same time, a water pump can be arranged on the outside of the shield tunnel to discharge the water in the drainage cavity to the outside, so as to prevent the inner tube 2 from being corroded due to excessive pressure in the drainage cavity.

[0041] When a certain part of the drainage cavity is blocked, the water pressure there will gradually increase, and the water pressure sensor 3 there can directly detect the water pressure change there, and send the water pressure information there to the monitoring center, so that the monitoring center will send staff to clear the blockage there;

[0042] During the clearing process, the gates 1h of the connecting ring assemblies 1 on both sides of the blockage point are closed to prevent the water accumulated during the clearing process from affecting the operation. Since the inner tube 2 is coaxially and detachably arranged between adjacent connecting ring assemblies 1, the inner tube 2 at the blockage point can be removed to clean the point. After the cleaning is completed, the inner tube 2 is coaxially installed on the two connecting ring assemblies 1, and the gate 1h is reopened, so that the exudate can be discharged to the outside through the gate 1h and the drainage cavity;

[0043] By setting the connecting ring assembly 1 and the inner tube 2 in the shield tunnel at equal intervals, the water seeping out of the shield tunnel can be guided to be discharged outward through the drainage cavity. At the same time, when blockage occurs, the gates on both sides of the blockage point can be closed for 1h to prevent the seeping water from affecting the cleaning operation.

[0044] Because the water pressure sensor 3 is located at the top of the inner tube 2, the water pressure sensor 3 can detect the pressure only when all the gates 1h on the connecting ring assembly 1 are blocked and the seeping water gradually fills the drainage cavity at the blockage point, thereby preventing the water pressure sensor 3 from directly detecting the water pressure in the flowing state due to its too low position, thereby effectively preventing the water pressure sensor 3 from being eroded by flowing water.

[0045] like Figure 5 and Figure 6 As shown, further:

[0046] The connecting ring assembly 1 comprises a fixed ring 1a, a rotating ring 1b and a toggle handle 1c;

[0047] The fixing ring 1a is arranged in the shield tunnel at equal intervals, and a coaxial placement groove 1a1 is arranged in the fixing ring 1a. Both sides of the placement groove 1a1 are evenly provided with guide ports 1a2 connected to the outside world. The inner circumference of the fixing ring 1a is also provided with a toggle arc groove 1a3, and the end of the inner tube 2 is detachably connected to the fixing ring 1a.

[0048] The rotating ring 1b is coaxially rotatably arranged in the placement groove 1a1, and the rotating ring 1b is provided with a conducting portion 1b1 that can communicate with the guide ports 1a2 on both sides, and a closing portion 1b2 that can close the guide ports 1a2 on both sides. The guide ports 1a2 form a gate 1h that can be closed and conducted;

[0049] The toggle handle 1c passes through the toggle arc groove 1a3 and is fixedly connected to the inner circumference of the rotating ring 1b.

[0050] By arranging the fixed rings 1a at equal intervals in the shield tunnel, the outer periphery of the fixed rings 1a is fixedly connected to the inner wall of the shield tunnel, and the fixed ring 1a is provided with a coaxial placement groove 1a1, the rotating ring 1b is coaxially rotatably arranged in the placement groove 1a1, and the rotating ring 1b can be rotated in the placement groove 1a1 by relatively moving the arc groove 1a3 along its circumferential direction. When the conducting part 1b1 is radially connected to the guide ports 1a2 on both sides, all the drainage cavities pass through the guide ports 1a1. a2 is connected to the conducting part 1b1, so that the seeping water can be discharged outward; when a drainage cavity at a certain place is blocked, it is necessary to clean the drainage cavity at that place. During the cleaning process, by rotating the rotating ring 1b, the closing part 1b2 is connected to the guide ports 1a2 on both sides, so that the guide ports 1a2 on both sides cannot be connected, thereby closing the drainage cavity at that place. Since the end of the inner tube 2 is detachably connected to the fixing ring 1a, the inner tube 2 of the drainage cavity at that place is removed to clean the point, thereby unblocking the drainage cavity;

[0051] The rotating ring 1 b is rotatably disposed in the fixed ring 1 a , so that the flow guide port 1 a 2 can be opened and closed by rotating the rotating ring 1 b .

[0052] like Figure 6 and Fig.10 As shown, further:

[0053] The fixed ring 1a includes a first long arc segment 1a4, a first short arc segment 1a5 and a positioning arc plate 1a6; the first long arc segment 1a4 and the first short arc segment 1a5 each have a plurality of sections, the first long arc segment 1a4 and the first short arc segment 1a5 are coaxially spaced to form a first ring body, the placement groove 1a1, the guide port 1a2 and the toggle arc groove 1a3 are arranged on the first ring body, the outer peripheries of the adjacent first long arc segments 1a4 and the first short arc segments 1a5 therebetween are also provided with mutually communicating positioning grooves, the positioning arc plate 1a6 is coaxially arranged in the positioning groove and fixedly connected to the inner wall of the shield tunnel; the rotating ring 1b includes a second long arc segment 1b3 and a second short arc segment 1b4, the second long arc segment 1b3 and the second short arc segment 1b4 are coaxially spaced to form a second ring body, the conducting portion 1b1 and the closing portion 1b2 are arranged on the second ring body, and the second ring body is coaxially arranged on the placement groove 1a1.

[0054] By coaxially arranging the first long arc segment 1a4 and the first short arc segment 1a5 to form a first ring body, the first long arc segment 1a4 and the first short arc segment 1a5 can be fixed in a shield tunnel with a very large inner diameter. At the same time, since the outer circumferences of the adjacent first long arc segments 1a4 and the first short arc segments 1a5 therebetween are also provided with mutually communicating positioning grooves, the positioning arc plate 1a6 can be coaxially clamped in the positioning groove, and the positioning arc plate 1a6 is fixedly connected to the inner wall of the shield tunnel, so that the first long arc segment 1a4 and the first short arc segment 1a5 are not easily misaligned due to axial force, thereby making the overall structure of the fixing ring 1a more stable;

[0055] The placement groove 1a1, the guide port 1a2 and the toggle arc groove 1a3 are arranged on the first ring body to facilitate the installation and rotation of the rotating ring 1b and to facilitate the communication with the drainage cavity;

[0056] The second long arc segment 1b3 and the second short arc segment 1b4 are coaxially spaced to form a second ring body, so that the second ring body can be rotatably arranged in the placement groove 1a1 with a large inner diameter. Since the conducting portion 1b1 and the closing portion 1b2 are arranged on the second ring body, when the rotating ring 1b is rotated, the adjacent drainage chambers can be connected or closed.

[0057] By splitting and installing the fixed ring 1a and the rotating ring 1b, it can be installed in a shield tunnel with a very large inner diameter, thereby realizing the waterproof operation of the shield tunnel.

[0058] like Figure 7 As shown, further:

[0059] The inner circumference of the rotating ring 1b is evenly distributed with semicircular grooves 1b5. The connecting ring assembly 1 also includes a ball 1d and a limiting arc plate 1e. The ball 1d is rotatably set in the semicircular groove 1b5. The limiting arc plate 1e is coaxially set on the inner circumference of the rotating ring 1b. The limiting arc plate 1e is evenly distributed with limiting grooves 1e1. The outside of the limiting arc plate 1e passes through the limiting groove 1e1 and rolls with it. The limiting arc plate 1e rolls with the inner circumference of the placement groove 1a1.

[0060] The rotating ring 1b is directly rotatably set on the seating groove 1a1. When rotating, the direct friction between the inner circumference of the rotating ring 1b and the inner circumference of the seating groove 1a1 is relatively large, making it inconvenient to rotate the rotating ring 1b relative to the fixed ring 1a. By evenly distributing the second short arc segments 1b4 on the inner circumference of the rotating ring 1b, the ball 1d is rotatably set in the second short arc segment 1b4, and the limiting arc plate 1e is coaxially set on the inner circumference of the rotating ring 1b, so that the ball 1d cannot pass through the limiting groove 1e1 and escape from the second short arc segment 1b4, so that the static friction between the inner circumference of the rotating ring 1b and the inner circumference of the seating groove 1a1 is converted into rolling friction, so as to facilitate the rotation of the rotating ring 1b relative to the fixed ring 1a.

[0061] like Figure 4 As shown, further:

[0062] Coaxial semicircular grooves 1b5 are provided on both sides of the rotating ring 1b. The connecting ring assembly 1 further comprises a first sealing ring 1f, which is coaxially provided on the semicircular groove 1b5 and has an interference fit with the side wall of the accommodating groove 1a1.

[0063] Since the inner circumference of the fixed ring 1a is provided with an arc groove 1a3, the water that penetrates into the drainage cavity at the gap of the shield tunnel corridor may penetrate into the inner circumference of the inner tube 2 through the arc groove 1a3, and the inner circumference of the water pressure sensor 3 can be arranged with various engineering pipelines such as electricity, communication, gas, heating, water supply and drainage, and the penetrated water will erode the engineering inertia. By providing coaxial semicircular grooves 1b5 at both ends of the rotating ring 1b, so as to facilitate the coaxial fitting of the first sealing ring 1f on the semicircular groove 1b5, the first sealing ring 1f can be prevented from detaching from the semicircular groove 1b5 during the rotation of the rotating ring 1b. By making the first sealing ring 1f have an interference fit with both sides of the mounting groove 1a1, the seeped water cannot overflow into the water pressure sensor 3 through the arc groove 1a3, and thus cannot erode the engineering pipeline.

[0064] like Fig.10 As shown, further:

[0065] The toggle handle 1c includes a threaded rod 1c1 and a hand-held rod 1c2. The threaded rod 1c1 radially penetrates the toggle arc groove 1a3 and is threadedly connected to the inner circumference of the rotating ring 1b; the hand-held rod 1c2 is radially arranged at the outer end of the threaded rod 1c1.

[0066] The threaded rod 1c1 is passed through the arc groove 1a3 and then connected with the inner circumference thread of the rotating ring 1b, so as to facilitate the disassembly and installation of the rotating ring 1b and the threaded rod 1c1. At the same time, by moving the hand-held rod 1c2 relative to the inner tube 2 along its circumference, the threaded rod 1c1 can drive the rotating ring 1b to rotate in the fixed ring 1a, thereby closing or connecting the diversion port 1a2, thereby realizing the connection and closure of adjacent drainage cavities.

[0067] like Fig.10 As shown, further:

[0068] The toggle handle 1c further includes a positioning nut 1c3, which is coaxially screwed onto the threaded rod 1c1 and abuts against the inner circumference of the fixing ring 1a.

[0069] By coaxially screwing the positioning nut 1c3 onto the threaded rod 1c1, when it is necessary to fix the position of the threaded rod 1c1 relative to the moving arc groove 1a3, the positioning nut 1c3 is rotated relative to the threaded rod 1c1 so that the positioning nut 1c3 abuts against the inner circumference of the fixing ring 1a, thereby fixing the position of the driving handle 1c relative to the moving arc groove 1a3; when it is necessary to drive the threaded rod 1c1, the positioning nut 1c3 is rotated so that the positioning nut 1c3 is away from the inner circumference of the fixing ring 1a, thereby being able to rotate the threaded rod 1c1 relative to the moving arc groove 1a3, thereby rotating the rotating ring 1b.

[0070] like Figure 4 As shown, further:

[0071] The connecting ring assembly 1 also includes a second sealing ring 1g. Both ends of the inner circumference of the fixing ring 1a are also provided with coaxial stepped grooves 1a7. The outer circumference of the end of the inner tube 2 is coaxially and detachably arranged on the stepped groove 1a7. The second sealing ring 1g is coaxially arranged between the stepped groove 1a7 and the outer circumference of the end of the inner tube 2.

[0072] By setting coaxial stepped grooves 1a7 at both ends of the inner circumference of the fixing ring 1a, the end of the inner tube 2 can be fixed to the stepped groove 1a7 by screws. At the same time, the second sealing ring 1g is coaxially set between the stepped groove 1a7 and the outer circumference of the end of the inner tube 2, so that the end of the inner tube 2 and the stepped groove 1a7 are waterproofed to prevent liquid from overflowing into the water pressure sensor 3 through the gap, thereby improving the waterproof performance.

[0073] like Fig. 9 As shown, further:

[0074] The inner tube 2 includes a plurality of arcuate segments 2a, which are coaxially arranged to form a third ring body. The third ring body is coaxially arranged between adjacent connecting ring assemblies 1. The arcuate segments 2a are provided with grooves that fit in with the adjacent arcuate segments 2a on both sides of their radial directions.

[0075] A plurality of arc-shaped segments 2a are coaxially connected to form a complete third ring body, and the arc-shaped segments 2a are provided with grooves interlocking with the adjacent arc-shaped segments 2a along their radial sides, which can effectively prevent the liquid in the drainage cavity from overflowing into the water pressure sensor 3 through the interlocking grooves, thereby facilitating the disassembly of the inner tube 2 and improving the sealing between the arc-shaped segments 2a, thereby preventing the liquid in the drainage cavity from penetrating into the inner tube 2 through the connection and corroding the engineering pipeline.

[0076] like Fig. 9 As shown, further:

[0077] The inner tube 2 further comprises a rubber strip 2b, which is arranged along the axis in the grooves where adjacent arc-shaped tube segments 2a are embedded with each other.

[0078] The arc-shaped tube segment 2a is provided with grooves interlocking with the adjacent arc-shaped tube segment 2a on both sides along its radial direction, and there is a gap between the grooves. By inserting the rubber strip 2b in the gap along the axial direction, after the arc-shaped tube segment 2a forms a complete third ring body, the rubber strip 2b can seal the gap to prevent the liquid in the drainage cavity from seeping into the inner tube 2.

[0079] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. An underground shield tunnel anti-seepage device, used to be arranged inside the shield tunnel, characterized in that: It comprises a connecting ring assembly (1), an inner tube (2) and a water pressure sensor (3); The connection ring components (1) are arranged at equal intervals in the shield tunnel, and the connection ring components (1) are evenly distributed with gates (1h) that can be opened and closed; The inner tube (2) is detachably arranged between adjacent connection ring assemblies (1); the outer periphery of the inner tube (2) and the inner wall of the shield tunnel gallery form a drainage cavity; the gate (1h) is in communication with the drainage cavity; The water pressure sensor (3) is arranged on the top of the inner tube (2), and the detection end of the water pressure sensor (3) passes through the inner tube (2) and extends into the drainage cavity; The connecting ring assembly (1) comprises a fixed ring (1a) and a rotating ring (1b); A fixed ring (1a) is arranged at equal intervals in a shield tunnel; a coaxial placement groove (1a1) is arranged inside the fixed ring (1a); both sides of the placement groove (1a1) are provided with flow guide ports (1a2) communicating with the outside world; an arc-switching groove (1a3) is also arranged on the inner periphery of the fixed ring (1a); and the end of the inner tube (2) is detachably connected to the fixed ring (1a); The rotating ring (1b) is coaxially rotatably arranged in the placement groove (1a1), and the rotating ring (1b) is provided with a conducting portion (1b1) that can communicate with the flow guide ports (1a2) on both sides, and a closing portion (1b2) that can close the flow guide ports (1a2) on both sides, and the flow guide ports (1a2) form a gate (1h) that can be closed and conducted; The fixing ring (1a) comprises a first long arc segment (1a4), a first short arc segment (1a5) and a positioning arc plate (1a6); the first long arc segment (1a4) and the first short arc segment (1a5) each have a plurality of sections; the first long arc segment (1a4) and the first short arc segment (1a5) are coaxially spaced to form a first ring body; The rotating ring (1b) comprises a second long arc segment (1b3) and a second short arc segment (1b4), and the second long arc segment (1b3) and the second short arc segment (1b4) are coaxially spaced and arranged to form a second ring body.

2. The anti-seepage device for underground shield tunnel gallery according to claim 1, characterized in that: The connecting ring assembly (1) also comprises a toggle handle (1c), which passes through the toggle arc groove (1a3) and is fixedly connected to the inner periphery of the rotating ring (1b).

3. The anti-seepage device for underground shield tunnel gallery according to claim 2 is characterized in that: The fixed ring (1a) further comprises a positioning arc plate (1a6); the placement groove (1a1), the guide port (1a2) and the toggle arc groove (1a3) are arranged on the first ring body; mutually communicating positioning grooves are also arranged on the outer peripheries of adjacent first long arc segments (1a4) and the first short arc segments (1a5) therebetween; the positioning arc plate (1a6) is coaxially arranged in the positioning groove and fixedly connected to the inner wall of the shield tunnel; the conducting portion (1b1) and the closing portion (1b2) are arranged on the second ring body; and the second ring body is coaxially arranged on the placement groove (1a1).

4. An anti-seepage device for underground shield tunnel gallery according to claim 2 or 3, characterized in that: The inner circumference of the rotating ring (1b) is uniformly provided with semicircular grooves (1b5). The connecting ring assembly (1) further comprises a ball (1d) and a limiting arc plate (1e). The ball (1d) is rotatably arranged in the semicircular groove (1b5). The limiting arc plate (1e) is coaxially arranged on the inner circumference of the rotating ring (1b). The limiting arc plate (1e) is uniformly provided with limiting grooves (1e1). The outer portion of the limiting arc plate (1e) passes through the limiting grooves (1e1) and rolls with them. The limiting arc plate (1e) rolls with the inner circumference of the placement groove (1a1).

5. An anti-seepage device for underground shield tunnel gallery according to claim 2 or 3, characterized in that: Coaxial semicircular grooves (1b5) are arranged on both sides of the rotating ring (1b). The connecting ring assembly (1) also includes a first sealing ring (1f). The first sealing ring (1f) is coaxially arranged on the semicircular groove (1b5) and is interference-fitted with the side wall of the placement groove (1a1).

6. An anti-seepage device for underground shield tunnel gallery according to claim 2 or 3, characterized in that: The toggle handle (1c) comprises a threaded rod (1c1) and a hand-held rod (1c2); the threaded rod (1c1) radially penetrates the toggle arc groove (1a3) and is threadedly connected to the inner circumference of the rotating ring (1b); and the hand-held rod (1c2) is radially arranged at the outer end of the threaded rod (1c1).

7. The anti-seepage device for underground shield tunnel gallery according to claim 6, characterized in that: The toggle handle (1c) also includes a positioning nut (1c3), which is coaxially screwed onto the threaded rod (1c1), and the positioning nut (1c3) abuts against the inner circumference of the fixing ring (1a).

8. An anti-seepage device for underground shield tunnel gallery according to claim 2 or 3, characterized in that: The connecting ring assembly (1) also includes a second sealing ring (1g), and both ends of the inner circumference of the fixing ring (1a) are also provided with coaxial stepped grooves (1a7) therewith, and the outer circumference of the end of the inner tube (2) is coaxially and detachably arranged on the stepped groove (1a7), and the second sealing ring (1g) is coaxially arranged between the stepped groove (1a7) and the outer circumference of the end of the inner tube (2).

9. The anti-seepage device for underground shield tunnel gallery according to claim 1, characterized in that: The inner tube (2) comprises a plurality of arc-shaped segments (2a), which are coaxially arranged to form a third ring body, and the third ring body is coaxially arranged between adjacent connecting ring assemblies (1). The arc-shaped segments (2a) are provided with grooves that interlock with the adjacent arc-shaped segments (2a) along both sides of the radial direction.

10. The anti-water seepage device for underground shield tunnel gallery according to claim 9, characterized in that: The inner tube (2) also comprises a rubber strip (2b), which is arranged along the axis in the grooves of adjacent arc-shaped tube segments (2a) that are embedded with each other.

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