Shield segment rigid-flexible collaborative anti-shock and shock-absorption connecting assembly, construction method and tunnel

Abstract

The invention discloses a rigid-flexible collaborative anti-shock and shock-absorbing shield segment connecting device for a shield tunnel. The rigid-flexible collaborative anti-shock and shock-absorbing shield segment connecting device comprises a flexible connecting assembly and a joint rigid connecting assembly. The flexible connecting assembly is used for connecting adjacent pipe piece main bodies in the single-ring pipe piece; the profile steel comprises a profile steel body, a flexible waterproof cushion layer, a flexible rubber cushion layer, a hard rubber connecting layer and a movable connecting piece. The number of the profile steel bodies is two, a hard rubber connecting layer is arranged between the two profile steel bodies, a flexible rubber cushion layer is arranged on the inner side of a web of each profile steel body, a flexible rubber cushion layer is arranged on the inner side of a flange plate of each profile steel body, movable connecting pieces are arranged at the two ends of each hard rubber connecting layer, and the two profile steel bodies are connected through the movable connecting pieces; the welding plate is located on the inner side of the flexible connecting assembly. The joint rigid connecting assembly comprises a flexible connecting piece fixed to the side face of the segment body, a reinforced steel plate and a welding plate, and the reinforced steel plate and the section steel body are integrally formed. The reinforced steel plate is welded with the welding plate, and a sealing rubber layer is arranged between the welding plate and the duct piece.

Description

Technical Field

[0001] The present invention belongs to the technical field of shield segment installation, and specifically relates to a shield segment connection device and a construction method for a shield tunnel with coordinated rigidity and flexibility and anti-vibration. Background Art

[0002] Shield tunnels are mainly composed of shield segment rings. Joints between adjacent shield segment rings are formed. Under the influence of earthquakes, the joints between shield segment rings are prone to displacement. Especially when the shield tunnel passes through a stratum fault zone, due to the uneven distribution of strata in the stratum fault zone, not only will there be a large amount of displacement between the shield segment rings, but they may even open, seriously endangering the safety of the shield tunnel. At the same time, when subjected to earthquakes, adjacent segments in the shield segment ring will also have a certain degree of dislocation.

[0003] At present, in order to solve the above technical problems, a large number of patents have been disclosed. For example, in patent CN202310588465.2, a shield tunnel seismic structure and construction method are disclosed, but the patent mainly performs seismic design on the joint position of two adjacent pipe rings, and it is a flexible connection; similar technical solutions can also be found in CN202310588466.7; in patent CN202110902452.9, a vibration-damping shield segment joint structure and a shield segment vibration-damping method are disclosed. This patent is mainly for the vibration-damping design between shield segments; similarly, the semi-rigid shield tunnel segment for crossing faults disclosed in patent 202310577283.5 is also an improvement made solely for shield tunnel segments;

[0004] In summary, in the shield tunnel seismic technology disclosed in the existing patents, the seismic design of the joints between two adjacent pipe rings and the seismic design of the shield segment ring are mostly designed independently without comprehensive consideration, resulting in poor overall seismic effect of the shield segment ring. Summary of the invention

[0005] In order to solve the technical problems existing in the prior art, the present invention provides a connection device and a construction method for a shield tunnel rigid-flexible and anti-shock shield segment. The device and the construction method comprehensively consider the shock absorption at the joint position of two adjacent pipe rings and the reinforcement of the shield segment ring. The shock absorption at the two positions forms a whole, thereby improving the shock absorption effect of the tunnel segment.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, the present invention provides a shield tunnel rigid-flexible coordinated anti-vibration shield segment connection device, comprising a flexible connection component and a rigid connection component;

[0008] The flexible connection assembly is used to connect the annular joints of adjacent segment rings; it includes an annular steel body, a flexible waterproof cushion layer, a flexible rubber cushion layer, a hard rubber connection layer, and a movable connection piece; the steel body includes two and both are arc-shaped, a hard rubber connection layer is arranged between the webs of the two arc-shaped steel bodies, and the two arc-shaped steel bodies are connected by two arc-shaped movable connections; the movable connection piece is located on the outside of the hard rubber connection layer; a flexible rubber cushion layer is arranged on the inner side of the web of each steel body, and a flexible rubber cushion layer is arranged on the inner side of the flange plate of the steel body;

[0009] The rigid connection assembly reinforces the axial connection between adjacent segments; it includes a reinforcing steel plate and a welding plate, the reinforcing steel plate is integrally formed with the steel body; the welding plate is welded to the reinforcing steel plate of the adjacent segment ring, a sealing rubber layer is arranged between the welding plate and the segment; and the welding plate is located on the outer ring of the segment ring.

[0010] As a further technical solution, anchor holes are reserved on the two flange plates of the steel body and the flexible waterproof cushion layer.

[0011] As a further technical solution, the anchor cable holes on the flange plate close to the tunnel side wall are sealed with hard rubber and waterproof materials to prevent groundwater from flowing into the tunnel during the installation of the connecting device.

[0012] As a further technical solution, the flange plate in the steel body close to the tunnel side wall is wedge-shaped.

[0013] As a further technical solution, the waterproof cushion layer is wedge-shaped.

[0014] As a further technical solution, anchor cables of different lengths are connected to the pipe segments.

[0015] As a further technical solution, along the annular direction, the steel bodies in adjacent flexible connection components are welded together to form an annular shape.

[0016] In a second aspect, the present invention further provides a tunnel, wherein the shield segments are connected by the shield segment rigid-flexible coordinated anti-vibration connection assembly.

[0017] In a third aspect, based on the above connection device, the present invention also provides a construction method.

[0018] (1) Install the first shield segment ring according to the tunnel position of the construction tunnel;

[0019] (2) The assembled flexible connection components are installed one by one on the first shield segment ring. Each flexible connection component 2 is installed by jack extrusion. The joints of adjacent flexible connection components can be welded and reinforced so that multiple flexible connection components form a ring-shaped connection device; and one of the steel bodies in each flexible connection component is connected to the first shield segment ring; and the next ring of shield segments is assembled in the other steel body 6 to form a second shield segment ring;

[0020] (3) Install anchor cables through the reserved anchor cable holes to reinforce the shield segment ring;

[0021] (4) Inject epoxy resin through the reserved grouting holes to fill the gap between the pipe segment and the connecting device to meet the waterproof requirements;

[0022] (5) Select a welding plate and a sealing rubber layer of appropriate size, set a sealing rubber layer on the outer side of the axial joint position of the first shield segment ring and the second shield segment ring, and then weld the welding plate and the reinforcing steel plate;

[0023] (6) Install the remaining shield segment rings in sequence according to steps (2) to (5);

[0024] (7) Grouting is performed on the shield segment wall to form the overall structure of the shield tunnel.

[0025] Compared with the prior art, the shield segment connection device proposed by the present invention has the following advantages:

[0026] (1) The present invention adopts a design mode that combines flexible connection with rigid connection. At the circumferential joints of the shield tunnel segments, a flexible connection method is used between the shield segments to meet a certain amount of misalignment between the shield segment rings; at the axial joints of the segment rings, a rigid reinforcement design is adopted, and the rigid reinforcement design and the flexible connection are integrally formed through the steel body and the reinforcing steel plate. The reinforcement position is adjusted so that the shock absorption at the joints of two adjacent segments of the rings and the shock absorption of the shield segment ring form a whole, which fully ensures that the shield segment ring can still maintain a complete structural form and the overall performance of the shield segment under the action of an earthquake, thereby improving the safety and reliability of the shield tunnel;

[0027] (2) The shield tunnel is reinforced with unequal length anchor cables, which improves the stability and adaptability of the structure under longitudinal stress conditions in different geological conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is the overall effect diagram of the shield tunnel connection device;

[0029] Figure 2 , Figure 3 , Figure 4 It is a schematic diagram of the annular flexible connector of the shield segment;

[0030] Figure 5 It is a detailed drawing of the movable connection;

[0031] Figure 6 This is a schematic diagram of the rigid weld plate connection of the longitudinal seam of the shield segment;

[0032] Figure 7 It is a three-dimensional schematic diagram of the welding plate connection;

[0033] In the figure: 1-shield segment, 2-flexible connection component, 3-rigid connection component, 4-long anchor cable, 5-short anchor cable, 6-steel body, 7-hard rubber plug, 8-movable connection part, 9-flexible rubber cushion, 10-shield segment, 11-waterproof cushion, 12-hard rubber connection layer, 13-reserved anchor hole, 14-reserved grouting hole, 15-reserved slurry outlet hole 16-first shield segment body, 17-second shield segment body, 18-third shield segment body, 19-fourth shield segment body, 20-first flexible connection component, 21-second flexible connection component, 22-reinforced steel plate, 23-segment joint, 24-weld, 25-weld plate, 26-sealing rubber layer, 801-movable connection unit mounting groove, 802-movable link unit, 803-connecting rod. DETAILED DESCRIPTION

[0034] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0036] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0037] Glossary: ​​The "annular" in the present invention refers to: an annular direction formed based on a single-ring segment; that is, the annular flexible connector in this embodiment refers to the flexible connector used to connect adjacent single-ring segments.

[0038] The "axial direction" in the present invention refers to the joints formed between adjacent segments in a single ring segment along the length direction of the shield tunnel;

[0039] The "inside" in the present invention refers to the tunnel cross section as a reference, the inner circle of the tunnel is defined as the inner side, and the outer circle is defined as the outer side.

[0040] The patent is described below in conjunction with the accompanying drawings:

[0041] This embodiment discloses a shield tunnel rigid-flexible anti-vibration shield segment connection device, such as Figure 1 As shown, the device mainly includes: a shield segment annular flexible connection component 2, a shield segment longitudinal joint rigid connection component 3, a long anchor cable 4, and a short anchor cable 5; wherein, the shield segment annular flexible connection component 2 and the shield segment longitudinal joint rigid connection component 3 are of integrated design, that is, the shield segment annular flexible connection component 2 and the shield segment longitudinal joint rigid connection component 3 are not independent, and the two are formed into a whole through the steel body 6 and the reinforcing steel plate 22, that is, this embodiment comprehensively considers the shock absorption of the joint position of two adjacent pipe rings and the shock absorption of the shield segment ring, and the shock absorption of the two positions forms a whole, thereby improving the shock absorption effect of the tunnel segment.

[0042] Furthermore, the shield segment annular flexible connection assembly 2 disclosed in the present embodiment includes multiple, and its number is half of the number of segments. Each shield segment annular flexible connection assembly 2 includes: a steel body 6, a flexible waterproof cushion layer 11, a flexible rubber cushion layer 9, a hard rubber connection layer 12, a movable connection piece 8, and reserved grouting holes and anchor holes; wherein, the steel body 6 includes two, both of which are arc-shaped groove-shaped structures, the webs of the two steel bodies 6 are arranged oppositely, and a hard rubber connection layer 12 is arranged between the webs of the two steel bodies 6, and the hard rubber connection layer 12 is adhered to the two steel bodies 6 to form a whole; and on the outside of the hard rubber connection layer 12 are two movable connections 8, the two movable connections are also arc-shaped, and the two movable connections 8 connect the two steel bodies 6; a flexible rubber cushion layer 9 is arranged on the inner side of the web of each steel body 6, and a flexible rubber cushion layer 9 is arranged on the inner side of the flange plate of the steel body,

[0043] Furthermore, the length of the flange plate and the web of the steel body 6 can be selected according to the different specifications of the I-beams. The upper outer part of the steel body 6 (fitting the outer wall of the tunnel) and the flexible waterproof cushion layer 11 are both wedge-shaped to ensure that the shield brush can pass smoothly, while ensuring that the pipe segments are firmly installed and not easy to fall off.

[0044] Furthermore, the flexible rubber cushion layer 9 can prevent damage to the pipe segment and the steel body due to collision during an earthquake, and meet the displacement amount to a certain extent.

[0045] The steel bodies on both sides are connected by movable connecting components and hard rubber layers. When there is no earthquake, the chain-link connection structure and the hard rubber layer can ensure that there will be no displacement on both sides under normal use. When an earthquake occurs in the shield tunnel, the hard rubber layer can meet the displacement to a certain extent. At the same time, the movable connecting parts can protect the connecting parts and shield segments from damage or even destruction.

[0046] Two types of holes are reserved in this connector, including reserved anchor holes 13 and reserved grouting holes 14; the reserved anchor holes 13 penetrate the two wing plates of the steel body 6 and the flexible waterproof cushion layer 9 to achieve the connection of the anchor cables; and the reserved grouting holes 13 only penetrate the lower flange part of the steel body and the flexible rubber cushion layer and then lead to the flexible waterproof cushion layer. At the same time, a slurry outlet hole 15 is set at the height of 2 / 3 to 1 / 2 of the flexible rubber cushion layer to ensure that the slurry can smoothly reach the corresponding area during subsequent grouting.

[0047] The rock and soil layer on one side of the reserved anchor hole is sealed with hard rubber and waterproof materials to prevent groundwater from flowing into the tunnel during the installation of the connecting device.

[0048] Furthermore, the rigid connection assembly of the longitudinal seam of the shield segment mainly includes a reinforcing steel plate 22, a welding plate 25 and a sealing rubber layer 26; the reinforcing steel plate 22 is integrally formed with the above-mentioned steel body 6, that is, the steel body 6 is both a part of the flexible connection assembly and a part of the rigid connection assembly. Through this design, the longitudinal seam connection and the circumferential connection of the shield segment form a whole, thereby enhancing the seismic resistance; one of the reinforcing steel plates 22 is integrally formed with the steel body 6 in the first flexible connection assembly 20, and the other reinforcing steel plate 22 is integrally formed with the steel body 6 in the second flexible connection assembly 21; the two reinforcing steel plates 22 are welded to the same welding plate 25, and a sealing rubber layer 26 is provided between the bottom of the welding plate 25 and the seam of the shield segment to prevent groundwater from corroding the seam of the shield segment. After completing the installation of the shield segment annular flexible connectors, in order to prevent the shield segments from displacing at the annular joints during an earthquake, welding plates will be added to the annular segment connection joints. The welding plates will be welded to the reinforcing steel plates at the flanges of the connector steel sections.

[0049] Furthermore, the long anchor cables 4 and the short anchor cables 5 are set in unequal lengths. The shield segments in the fault zone area can be reinforced with long anchor cables, and the shield segments in the relatively homogeneous stratum area can be reinforced with short anchor cables.

[0050] The installation process of the above-mentioned shield segment connection device is as follows:

[0051] (1) Position the bottom segment according to the tunnel position of the construction tunnel, then install the adjacent segments on both sides, and finally install the capping segment to form the first shield segment ring;

[0052] (2) The assembled flexible connection components 2 are installed one by one on the first shield segment ring. Each flexible connection component 2 is installed by jack extrusion. The joints of adjacent flexible connection components 2 can be welded and reinforced so that multiple flexible connection components 2 form a ring-shaped connection device; and one of the steel bodies 6 in each flexible connection component 2 is connected to the first shield segment ring; and the next ring of shield segments is assembled in the other steel body 6 to form a second shield segment ring;

[0053] (3) Remove the hard rubber plug and install the anchor cable through the reserved anchor cable hole to reinforce the shield segment ring;

[0054] (4) Inject epoxy resin through the reserved grouting holes to fill the gap between the pipe segment and the connecting device to meet the waterproof requirements;

[0055] (5) Select a welding plate and a sealing rubber layer of appropriate size, set a sealing rubber layer on the outer side of the axial joint position of the first shield segment ring and the second shield segment ring, and then weld the welding plate and the reinforcing steel plate;

[0056] (6) Install the third shield segment ring, the fourth shield segment ring, the fifth shield segment ring, etc. in sequence according to the previous steps;

[0057] (7) Grouting is performed on the shield segment wall to form the overall structure of the shield tunnel.

[0058] The present invention adopts a design mode combining flexible connection with rigid connection. In the longitudinal connection of the shield tunnel, a flexible connection method is adopted between the shield segments to meet a certain amount of displacement between the shield segment rings. In the circumferential joints of the segment rings, a rigid reinforcement design is adopted to strengthen the connection strength of this area, fully ensuring that the shield segment ring can still maintain a complete structural form and the overall performance of the shield segment under the action of an earthquake, thereby improving the safety and reliability of the shield tunnel.

[0059] The shield tunnel is reinforced with unequal length anchor cables as a whole, which improves the stability and adaptability of the structure under longitudinal stress conditions in different formations.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A shield segment rigid-flexible anti-vibration connection assembly, characterized in that: It includes flexible connection components and rigid connection components; The flexible connection assembly is used to connect the annular joints of adjacent segment rings; it includes an arc-shaped steel body, a flexible waterproof cushion layer, a flexible rubber cushion layer, a hard rubber connection layer, and a movable connection piece; the steel body includes two arc-shaped bodies, a hard rubber connection layer is arranged between the webs of the two arc-shaped steel bodies, and the two arc-shaped steel bodies are connected by two arc-shaped movable connections; the movable connection piece is located on the outside of the hard rubber connection layer; a flexible rubber cushion layer is arranged on the inner side of the web of each steel body, and a flexible rubber cushion layer is arranged on the inner side of the flange plate of the steel body; The rigid connection assembly reinforces the axial connection between adjacent segments; it includes a reinforcing steel plate and a welding plate, the reinforcing steel plate is integrally formed with the steel body; the welding plate is welded to the reinforcing steel plate of the adjacent segment ring, a sealing rubber layer is arranged between the welding plate and the segment; and the welding plate is located on the outer ring of the segment ring.

2. The shield segment rigid-flexible anti-vibration connection assembly according to claim 1, characterized in that: Anchor holes are reserved on the steel body and the flexible waterproof cushion layer.

3. The shield segment rigid-flexible anti-vibration connection assembly according to claim 1, characterized in that: The anchor holes on the flange plates close to the tunnel side walls are sealed with hard rubber and waterproof materials.

4. The shield segment rigid-flexible anti-vibration connection assembly according to claim 1, characterized in that: Grouting holes are reserved on the steel body and the flexible waterproof cushion layer, and grouting holes are reserved on the flexible rubber cushion layer.

5. The shield segment rigid-flexible anti-vibration connection assembly according to claim 1, characterized in that: The flange plate close to the tunnel side wall in the steel body is wedge-shaped.

6. The shield segment rigid-flexible anti-vibration connection assembly according to claim 1, characterized in that: The waterproof cushion layer is wedge-shaped.

7. The shield segment rigid-flexible anti-vibration connection assembly according to claim 1, characterized in that: Anchor cables of different lengths are connected to the segments.

8. The shield segment rigid-flexible anti-vibration connection assembly according to claim 1, characterized in that: Along the annular direction, the steel sections in adjacent flexible connection components are welded together to form an annular shape.

9. A tunnel, characterized in that: The shield segments are connected by using the rigid-flexible and anti-vibration connection components of the shield segments described in any one of claims 1-7.

10. The construction method of the shield segment rigid-flexible coordinated anti-vibration connection assembly according to any one of claims 1 to 8, characterized in that: (1) Install the first shield segment ring according to the tunnel position of the construction tunnel; (2) The assembled flexible connection components are installed one by one on the first shield segment ring. Each flexible connection component 2 is installed by jack extrusion. The joints of adjacent flexible connection components can be welded and reinforced so that multiple flexible connection components form a ring-shaped connection device; and one of the steel bodies in each flexible connection component is connected to the first shield segment ring; and the next ring of shield segments is assembled in the other steel body 6 to form a second shield segment ring; (3) Install anchor cables through the reserved anchor cable holes to reinforce the shield segment ring; (4) Inject epoxy resin through the reserved grouting holes to fill the gap between the pipe segment and the connecting device to meet the waterproof requirements; (5) Select a welding plate and a sealing rubber layer of appropriate size, set a sealing rubber layer on the outer side of the axial joint position of the first shield segment ring and the second shield segment ring, and then weld the welding plate and the reinforcing steel plate; (6) Install the remaining shield segment rings in sequence according to steps (2) to (5); (7) Grouting is performed on the shield segment wall to form the overall structure of the shield tunnel.

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