A concealed type shield segment pre-buried threading structure and a threading method thereof

Abstract

The application provides a hidden shield segment pre-buried threading structure and a threading method thereof. The pre-buried threading structure comprises a wire inlet pipe, two intermediate bend pipes, two special-shaped bend pipes and two U-shaped grooves. The wire inlet pipe is connected with the two intermediate bend pipes. The other end of the intermediate bend pipe is connected with one end of the special-shaped bend pipe. The other end of the special-shaped bend pipe is connected with the U-shaped groove. The U-shaped groove is located at the two ends of the shield segment, and the opening direction is outward, so that a communication pipeline is formed in the shield segment. The pre-buried sensor cable is introduced into the pipeline through the wire inlet pipe and the three-way pipe. The sensor cable is threaded from the shield segment by the pre-buried pipe. The wiring operation is arranged at the ring joint of the shield segment. Finally, the cable is taken out from the safe position at the bottom of the tunnel and introduced into the track box culvert to set up a collection station. After the next ring is assembled, the cable is fully closed, the cable is not exposed on the inner wall of the tunnel, the cable is not exposed on the inner wall of the tunnel during construction and operation, and the safety hazard is eliminated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel and underground engineering health monitoring, and particularly relates to a hidden type shield segment pre-buried threading structure and a threading method thereof. BACKGROUND

[0002] In recent years, shield tunnels in China have developed unprecedentedly, and tunnel operation period monitoring, as one of the most beneficial measures to ensure tunnel operation safety, is widely promoted. At present, the operation period monitoring usually adopts the method of embedding monitoring sensors in the tunnel lining. For shield tunnels, how to arrange sensor cables becomes a key difficulty, especially for high-speed rail tunnels and the like which have higher requirements on the operating environment, and the inner wall of the tunnel is prohibited from exposing cables, which puts forward very high requirements on the cable layout scheme.

[0003] Shield tunnels usually adopt assembled lining, which is composed of N prefabricated segments assembled into a ring to jointly bear external loads. At present, the operation period monitoring of subway and highway tunnels usually adopts the method of storing sensor cables in the wire storage box on the inner wall of the prefabricated segment, opening the wire storage box after the shield machine assembles the segments into a ring, taking out the cables, and arranging the cables along the inner wall of the shield tunnel. However, due to the consideration of operation safety, high-speed rail tunnels and the like have strict requirements on the exposure of cables on the inner wall of the tunnel, and therefore, it is an urgent problem to develop a hidden type shield segment pre-buried threading structure and a threading method thereof. SUMMARY

[0004] Therefore, the present application aims to provide a hidden type shield segment pre-buried threading structure and a threading method thereof, which are mainly applied to the layout of monitoring cables of high-speed rail shield tunnels. The structure and the use method thereof can fix the sensor data transmission cables inside the shield segment, uniformly introduce them into the space below the tunnel which has no influence on train operation for data acquisition, and ensure the concealment of the cables and the safety of train operation.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0006] A hidden type shield segment pre-buried threading structure, comprising an inlet pipe, two intermediate bend pipes, two special-shaped bend pipes and two U-shaped grooves, the inlet pipe is connected with the two intermediate bend pipes, the other end of the intermediate bend pipe is connected with one end of the special-shaped bend pipe, the other end of the special-shaped bend pipe is connected with the U-shaped groove, the U-shaped groove is located at both ends of the shield segment, and the opening direction is outward, so as to form a connected pipeline in the shield segment, and the pre-buried sensor cable can be introduced into the pre-buried pipeline through the inlet pipe and the three-way pipe.

[0007] The pre-buried threading pipe in the shield segment is connected by the U-shaped groove, the special-shaped bend pipe, the intermediate bend pipe and the inlet pipe. In this way, the flexibility of the threading pipe installation can be improved to adapt to the complex reinforcement arrangement in the segment.

[0008] Further, the U-shaped groove, the special-shaped elbow pipe, the intermediate elbow pipe and the wire inlet pipe are firmly fixed on the reinforcement cage of the shield segment.

[0009] In this way, the overall firmness of the wire inlet pipe during the pouring and vibrating of the shield segment concrete can be avoided, and position deviation can be avoided.

[0010] Further, the wire inlet pipe is mechanically connected to the two intermediate elbow pipes through a steel tee pipe.

[0011] In this way, the sensor cable pre-buried in the segment can enter the pre-buried steel pipe, and the left and right ends of the segment pre-buried steel pipe can be kept unblocked, so that the segment can be used as a data collection block, and the cable can pass through the segment.

[0012] Further, the outlet end of the intermediate elbow pipe is connected to the inlet end of the special-shaped elbow pipe through a flexible connecting piece.

[0013] In this way, the flexibility and smoothness of the transition between the two steel pipes can be increased, and the wire passing efficiency and quality can be improved.

[0014] Further, the flexible connecting piece can be a reinforced rubber pipe or a corrugated steel pipe, etc.

[0015] Further, the U-shaped groove is arranged at the middle position of the ring joint side of the shield segment.

[0016] Further, the outlet end of the special-shaped elbow pipe is welded with the U-shaped groove as a whole.

[0017] In this way, position deviation during the pouring and vibrating of the segment concrete can be avoided, and the wire passing effect can be affected.

[0018] A wire passing method using a hidden shield segment pre-buried wire passing structure, the process is as follows:

[0019] Firstly, the wire inlet pipe, the intermediate elbow pipe, the special-shaped elbow pipe and the U-shaped groove are assembled and fixed in sequence to form a complete wire passing pipe, and are firmly fixed with the reinforcement cage of the shield segment;

[0020] Secondly, the test sensor is installed on the reinforcement cage at the measured point, and the sensor cable is introduced into the pre-buried wire passing pipe through the wire inlet pipe, and is fixed at the connection between the special-shaped elbow pipe and the U-shaped groove, and then each pipe opening is plugged;

[0021] Thirdly, the segment concrete is poured, and after the segment concrete curing is completed, the next step is performed;

[0022] Fourthly, the surface layer concrete at the U-shaped groove is chiseled, the plugging material is taken out, and the cable is led out of the concrete structure for standby;

[0023] In the fifth step, during the shield tunneling process, N shield segments are assembled into a ring, and a complete groove is formed at the end of each adjacent two shield segments, which serves as a wiring operation space.

[0024] In the sixth step, wiring operation is performed at the groove of the joint between each adjacent two shield segments to form a complete path, and the tail end of the cable is pulled out from the shield segment at the bottom of the tunnel.

[0025] In the seventh step, sensor data checking and testing are performed at the outlet hole at the bottom of the tunnel to ensure that the sensor cable has formed a path, and after checking the data accuracy, the shield segment joint groove is sealed.

[0026] In the eighth step, the next ring of shield segments is assembled, and the track understructure construction at the bottom of the tunnel is completed.

[0027] In the ninth step, after the track understructure construction is completed, the cable at the outlet hole is introduced into the track understructure, and the subsequent collection station layout work begins, thus completing the full pre-burial of the sensor and cable.

[0028] Further, in the first step, the installation height of the U-shaped groove along the thickness direction of the shield segment can be positioned by placing a template or accurate measurement.

[0029] In this way, the positioning accuracy, the subsequent assembly accuracy and the wiring efficiency can be improved.

[0030] Further, in the second step, the sensor cable in the shield segment can be divided into two strands, which are pulled out along the left and right sides of the wire pipe respectively.

[0031] In this way, for optical fiber sensors, one side can be used for data collection, and the other side cable can be used for data checking or backup; for sensors that transmit through a single wire, this can reduce the number of single-side cables and improve the threading efficiency.

[0032] Compared with the prior art, the hidden shield segment pre-buried threading structure and the threading method thereof have the following advantages:

[0033] (1) The pre-buried pipe realizes full pre-burial of the shield tunnel monitoring sensor and cable, and real-time monitoring of the stress, internal force and deformation of the segment during construction and operation.

[0034] (2) The pre-buried pipe realizes threading of the sensor cable from the shield segment, the wiring operation is set at the joint of the shield segment ring, the cable is finally taken out from a safe position at the bottom of the tunnel, and is introduced into the track understructure box culvert to set up a collection station. After the next ring is assembled, the cable is fully sealed, truly realizing that there is no cable exposed on the inner wall of the tunnel, avoiding the exposure of the cable on the inner wall of the tunnel during construction and operation, and eliminating safety hazards. BRIEF DESCRIPTION OF DRAWINGS

[0035] The accompanying drawings, which form a part of the disclosure, are included to provide a further understanding of the application, illustrate the preferred embodiments of the application and assist in the explanation of the application. In the drawings, which are not necessarily to scale, :

[0036] Figure 1 is a schematic view of a cross-sectional structure of the present application;

[0037] Figure 2 is a schematic view of a planar structure of the present application;

[0038] Figure 3 is a schematic view of a method for using the present application;

[0039] Figure 4 is an enlarged view of a joint between adjacent shield segments of the present application.

[0040] BRIEF DESCRIPTION OF DRAWINGS

[0041] 1, first U-shaped groove; 2, second U-shaped groove; 3, first special-shaped elbow; 4, second special-shaped elbow; 5, first intermediate elbow; 6, second intermediate elbow; 7, wire inlet pipe; 8, first flexible connecting piece; 9, second flexible connecting piece; 10, tee; 11, pre-buried sensor; 12, sensor cable; 13, bent main reinforcement; 14, tie; 15, longitudinal reinforcement. DETAILED DESCRIPTION

[0042] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0044] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0046] As Figures 1 to 2 shown, a hidden shield segment pre-buried threading structure, comprising a first U-shaped groove 1, a second U-shaped groove 2, a first special-shaped elbow pipe 3, a second special-shaped elbow pipe 4, a first intermediate elbow pipe 5, a second intermediate elbow pipe 6, a wire inlet pipe 7, a first flexible connecting piece 8, a second flexible connecting piece 9, a tee pipe 10 and corresponding sealing materials. The first flexible connecting piece 8 and the second flexible connecting piece 9 can be ribbed rubber pipes, flexible corrugated steel pipes, etc. The outlet end of the first special-shaped elbow pipe 3 is connected with the first U-shaped groove 1 in a welding manner, the outlet end of the second special-shaped elbow pipe 4 is connected with the second U-shaped groove 2 in a welding manner, the inlet end of the first special-shaped elbow pipe 3 is connected with the outlet end of the first intermediate elbow pipe 5 by the first flexible connecting piece 8, the inlet end of the second special-shaped elbow pipe 4 is connected with the outlet end of the second intermediate elbow pipe 6 by the second flexible connecting piece 9, and the inlet ends of the first intermediate elbow pipe 5 and the second intermediate elbow pipe 6 are mechanically connected with the wire inlet pipe 7 through the tee pipe 10, thereby forming a communication pipeline in the shield segment. The pre-buried sensor cable 12 can be introduced into the pre-buried pipeline through the wire inlet pipe 7 and the tee pipe 10. After the shield segment is poured and formed, the first U-shaped groove 1 and the second U-shaped groove 2 are exposed on the outside of the shield segment ring joint end, and after a plurality of segments are assembled, a complete groove is formed with the U-shaped groove on one side of the adjacent block, thereby providing a threading and wiring operation space. After a plurality of segments are assembled, threading and wiring operations are performed, thereby introducing the sensor cable 12 into the lower part of the tunnel to collect data.

[0047] Specifically, after the pre-buried sensor 11 is installed at the specified position, the sensor cable 12 is introduced into the threading pipe through the wire inlet pipe 7, sequentially passes through the first intermediate elbow pipe 5, the first special-shaped elbow pipe 3 to the outlet end of the first special-shaped elbow pipe 3 for storage, or sequentially passes through the second intermediate elbow pipe 6, the second special-shaped elbow pipe 4 to the outlet end of the second special-shaped elbow pipe 4 for storage, and after the shield segment is poured and formed, the cable is taken out from the U-shaped grooves 1 and 2 for connection.

[0048] The bending main reinforcement 13, the tensioning reinforcement 14 and the longitudinal reinforcement 15 arranged in the shield segment form a reinforcement cage of the shield segment.

[0049] AsFigure 3 and Figure 4 As shown in the figure, after the shield segment is assembled into a ring, the first U-shaped groove 1 and the second U-shaped groove 2 of the adjacent two shield segments form a complete groove space, the cables in the pre-buried threading pipes of the adjacent two shield segments are taken out, and wiring and threading operations are performed at the groove to form a passage.

[0050] The working process of the embodiment is as follows: first, the first U-shaped groove 1 and the second U-shaped groove 2 are welded to the reinforcement cage at specified positions of the ends of the shield segment, then the first special-shaped elbow pipe 3 and the second special-shaped elbow pipe 4 are placed into the reinforcement cage at specified positions, and are welded to the first U-shaped groove 1 and the second U-shaped groove 2 at the outlet end to form an integral whole, and are fixed to the reinforcement cage, then the first intermediate elbow pipe 5 and the second intermediate elbow pipe 6 are fixed to the reinforcement cage at specified positions, and then the outlet end of the first intermediate elbow pipe 5 and the second intermediate elbow pipe 6 is connected to the inlet end of the first special-shaped elbow pipe 3 and the second special-shaped elbow pipe 4 by using the first flexible connecting piece 8 and the second flexible connecting piece 9, and the outlet end is mechanically connected to the inlet pipe 7 through the tee pipe 10, then the pre-buried sensor 11 is installed at the specified to-be-measured position, the sensor cable 12 is divided into left and right two strands, and is respectively introduced into the left and right inlet pipes 7, passes through the first intermediate elbow pipe 5 and the second intermediate elbow pipe 6, and is stored at the outlet of the first special-shaped elbow pipe 3 and the second special-shaped elbow pipe 4, and then all the pipe openings are sealed to wait for concrete pouring.

[0051] After the concrete pouring and curing are completed, the sealing of the outlet of the first special-shaped elbow pipe 3 and the second special-shaped elbow pipe 4 is opened, the stored cable is taken out for standby, after the segment is assembled into a ring, the cable is connected with the cable in the first U-shaped groove 1 and the second U-shaped groove 2 of the adjacent shield segment to form a passage, then the tail end of the cable is introduced from the segment below the track to the track structure at the bottom of the tunnel, and is connected to the collection station, finally, the groove between the segments is sealed and protected, and after the next ring of segments is assembled, the data transmission cable is fully pre-buried.

[0052] A threading method using a hidden shield segment pre-buried threading structure, the process is as follows:

[0053] Firstly, the inlet pipe, the intermediate elbow pipe, the special-shaped elbow pipe and the U-shaped groove are sequentially assembled and fixed to form a complete threading pipe, and are firmly fixed to the reinforcement cage of the shield segment;

[0054] Secondly, the test sensor is installed on the reinforcement cage at the to-be-measured point, and the sensor cable is introduced into the pre-buried threading pipe through the inlet pipe, and is fixed at the connection between the special-shaped elbow pipe and the U-shaped groove, and then the pipe openings are sealed;

[0055] Thirdly, the segment concrete is poured, and after the segment concrete curing is completed, the next step is performed;

[0056] Fourthly, the surface layer concrete at the U-shaped groove is chiseled, the sealing material is taken out, and the cable is introduced out of the concrete structure for standby.

[0057] The fifth step is that in the process of shield tunneling, N shield segments are assembled into a ring, and a complete groove is formed at the end U-shaped groove of each adjacent two shield segments as a wiring operation space.

[0058] The sixth step is that wiring operation is performed at the groove of the joint of each adjacent two shield segments to form a complete path, and the tail end of the cable is pulled out from the bottom shield segment of the tunnel.

[0059] The seventh step is to perform sensor data inspection and testing at the outlet hole of the tunnel bottom, to ensure that the sensor cable has formed a path, and to check the data accuracy, and then to seal the joint groove of the shield segment.

[0060] The eighth step is to assemble the next ring of shield segments to complete the construction of the track structure under the tunnel.

[0061] The ninth step is to introduce the cable at the outlet hole into the track structure after the track structure construction is completed, to start the subsequent collection station layout work, and thus the full pre-embedding of the sensor and cable is completed.

[0062] In the first step, the installation height of the U-shaped groove in the thickness direction of the shield segment can be positioned by placing a template or accurate measurement. The above method can improve the positioning accuracy, improve the subsequent assembly accuracy and wiring efficiency.

[0063] In the second step, the sensor cable in the shield segment can be divided into two strands, which are pulled out along the left and right sides of the threading pipe. In this way, for optical fiber sensors, one side can be used for data collection, and the other side of the cable can be used for data checking or backup; for sensors that transmit through a single wire, this can reduce the number of single cable and improve the threading efficiency.

[0064] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A wiring method using a concealed shield tunnel segment pre-embedded wiring structure, characterized in that: The utility model relates to a kind of pre-embedded sensor cable installation method of shield segment, including inlet pipe, two intermediate bends, two special-shaped bends and two U-shaped grooves, the inlet pipe is connected with two intermediate bends, the other end of the intermediate bend is connected with the one end of special-shaped bend, the other end of the special-shaped bend is connected with U-shaped groove, the U-shaped groove is located at the both ends of shield segment, and opening direction is outward, so that the shield segment is formed in a connected pipeline, pre-embedded sensor cable is introduced into the pipeline by inlet pipe and tee pipe; The process is as follows: First, the inlet pipe, intermediate bend, special-shaped bend and U-shaped groove are sequentially assembled and fixed to form a complete threading pipe, and are fixed with the reinforcement cage of the shield segment. Second, install the test sensor on the reinforcement cage at the measured point, and introduce the sensor cable into the pre-embedded threading pipe through the inlet pipe, and fix it at the connection between the special-shaped bend and the U-shaped groove, and then seal each pipe opening. Third, pour the segment concrete, and after the segment concrete is cured, proceed to the next step. Fourth, chisel the surface concrete at the U-shaped groove, remove the sealing material, and lead the cable out of the concrete structure for standby use. Fifth, during the shield tunneling process, assemble N shield segments into a ring, and form a complete groove at the U-shaped groove at the end of each adjacent two shield segments as a wiring operation space. Sixth, perform wiring operation at the groove at the joint of each adjacent two shield segments to form a complete path, and lead the tail end of the cable out of the tunnel bottom shield segment. Seventh, check and test the sensor data at the outlet hole at the bottom of the tunnel to ensure that the sensor cable has formed a path, and after checking the data accuracy, seal the groove at the joint of the shield segment. Eighth, assemble the next ring of shield segments to complete the construction of the track structure under the tunnel. Ninth, after the track structure under the tunnel is completed, lead the cable at the outlet hole into the track structure under the tunnel, start the subsequent collection station layout work, and thus complete the full pre-embedding of the sensor and cable.

2. The threading method of claim 1, wherein the threading method is characterized by: The U-shaped groove, special-shaped bend, intermediate bend and inlet pipe are all fixed at the reinforcement cage of the shield segment.

3. The threading method using the hidden shield segment pre-buried threading structure according to claim 1 or 2, characterized in that: The outlet end of the intermediate bend is connected with the inlet end of the special-shaped bend through a flexible connecting piece.

4. The threading method of claim 1, wherein the threading method is characterized by: The inlet pipe is connected with the two intermediate bends through a steel tee pipe.

5. The threading method of claim 3, wherein the method further comprises: The flexible connecting piece is a reinforced rubber pipe or corrugated steel pipe.

6. The threading method of claim 1, wherein the threading method is characterized by: The U-shaped groove is arranged at the intermediate position of the joint side of the shield segment ring.

7. The threading method of claim 1, wherein the method further comprises: providing a plurality of threaded rods; and inserting the threaded rods into the threaded holes of the plurality of threaded rods. The outlet end of the special-shaped bend is welded with the U-shaped groove as a whole.

8. The threading method of claim 1, wherein the method further comprises: providing a plurality of threaded holes in the pre-buried threading structure; and providing a plurality of threaded rods in the pre-buried threading structure. In the first step, the installation height of the U-shaped groove along the thickness direction of the shield segment is positioned by placing a template or accurate measurement.

9. A wiring method using a concealed shield tunnel segment pre-embedded wiring structure according to claim 1, characterized in that: In the second step, the sensor cable in the shield segment can be divided into two strands, which are led out along the left and right threading pipes respectively.

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