CN113006143B

CN113006143B - Suspension tunnel tube joint structure

Info

Publication number: CN113006143B
Application number: CN202110183244.8A
Authority: CN
Inventors: 吴林键; 马原飞; 刘明维; 袁希; 鞠学莉; 谢聪聪; 阿比尔的
Original assignee: Chongqing Jiaotong University
Current assignee: Chongqing Jiaotong University
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2022-10-18
Anticipated expiration: 2041-02-09
Also published as: CN113006143A

Abstract

The invention discloses a suspended tunnel pipe joint structure, which comprises a pipe joint for butting front and rear pipe joints; the pipe joint joints are connected end to end through two resistance keys, a prestressed anchor cable and a sealing damping structure, and a water stopping structure and a damping rubber support are arranged between the matched resistance keys, so that the damping and buffering performance of the pipe joint is ensured, and the water stopping capacity between pipe joints is also met. Compared with the traditional immersed tube connecting tunnel joint, the suspended tunnel connecting member provided by the invention has the advantages that the resistance keys of the traditional immersed tube tunnel are expanded, and the resistance keys in the axial direction, the radial direction and the circumferential direction are arranged, so that the suspended tunnel connecting member can adapt to the vibration and deformation of the underwater suspended tunnel in the complex marine environment, simultaneously meet the water tightness requirement of the suspended tunnel between the tube sections, and ensure that the tube sections cannot leak due to dislocation.

Description

Suspension tunnel tube joint structure

Technical Field

The invention relates to a suspended tunnel joint structure form.

Background

The suspended tunnel is also called an Archimedes bridge, is a large water-crossing traffic structure which supports the dead weight load and traffic load of the tunnel by buoyancy according to the Archimedes principle and is mainly used for solving the crossing problem of deep water areas and wide water areas. The floating tunnel has the advantages that the floating tunnel is not limited by span and water depth technically, can be built at the position with long span, deep water level and steep bank slope, and the manufacturing cost of the unit length of the floating tunnel is not increased along with the increase of the span. However, a systematic and complete theoretical system of the suspension tunnel is not formed in the world at present, and important core scientific problems such as the bearing capacity characteristic of a long-span suspension tunnel structure, the stability of a structure supporting system under severe sea conditions, the connection between pipe joints and the like and a series of engineering technical problems such as the establishment of a structural design standard system, the research and development of a high-toughness high-strength special structure new material, the construction process under deep water complicated conditions, the construction method, the equipment manufacturing, the risk assessment and the like need to be broken through. But the suspended tunnel has the advantages of the suspended tunnel and is expected to have very wide application prospect.

The connection between pipe joints is a very key link in a suspended tunnel and all underwater structures, at present, the research on the connection form of the underwater components at home and abroad mainly focuses on similar underwater structures such as immersed tube tunnels, shield tunnels and the like, and the research on the connection form between the pipe joints of the suspended tunnel is less. The pipe joint of the immersed tunnel comprises an intermediate joint, a shoreside joint and a final joint, wherein the intermediate joint is generally widely flexible, and the shoreside joint and the final joint are mainly rigid joints. In the construction of the mao bridge, majors have more innovatively proposed the concept of semi-rigid joints.

The suspension tunnel and the immersed tube tunnel belong to underwater structures, but the working environment of the suspension tunnel is greatly different from that of the immersed tube tunnel. The underwater suspension tunnel is usually at a depth of tens of meters to tens of meters under water, and along with complex marine environments such as waves and ocean currents, complex relative motion can be generated between pipe joints under the action of environmental loads, so that the pipe joints are subjected to conditions such as dislocation and opening, and the stress of the pipe joints is influenced. Meanwhile, the whole suspension tunnel is of a slender structure, so that the longitudinal rigidity of the suspension tunnel is not too high, and a flexible connecting structure is used for ensuring that the pipe joints can deform within a certain allowable range. Although the immersed tube tunnel connection joint adopts flexible connection, the freedom degree and the deformation capability of the immersed tube tunnel connection joint cannot meet the requirements of a suspension tunnel.

Large offshore Floating Structures (VLFS) refer to those offshore Floating Structures with kilometers in scale, and because the VLFS has a huge scale, it is obviously impossible to manufacture the Structures integrally, so the VLFS is necessarily a modular structure, and each module needs to be connected through a specially designed connecting member. Researchers at home and abroad also conduct research on connecting components of the VLFS, and as the working environment of the VLFS is also influenced by waves and ocean currents, the displacement and the movement mode of the VLFS are similar to those of a suspension tunnel. However, the basic structural form, dimension and working environment are still different, so the form of the connecting member cannot directly meet the requirement of the suspension tunnel.

At present, research and invention are also related to the connecting component of the suspension tunnel, but most of the connecting component is improved based on the joint form of the immersed tube tunnel, and the connecting component is not invented according to the special movement form of the suspension tunnel. Therefore, a new connection mode which can be suitable for connection among the tube sections of the suspended tunnel is found, the requirement for relative movement and stress under the action of environmental load is very important, and the watertight performance among the tube sections is ensured.

Disclosure of Invention

The invention aims to provide a suspended tunnel pipe joint structure with good energy dissipation and shock absorption performance and flexible deformation capacity.

The technical scheme adopted for realizing the aim of the invention is that the suspended tunnel pipe joint structure comprises a joint head part and a joint tail part.

The connector head part comprises a cylinder I, a plurality of torsion keys I and a shear key I, wherein the torsion keys I are arc-shaped plates with the outer diameters being consistent with the outer diameters of the cylinder I, the torsion keys I are connected to one end face of the cylinder I, and the torsion keys I are arranged at equal intervals along the circumferential direction of the cylinder I.

Shear force key I is the ring structure, and shear force key I is fixed on the terminal surface that I is connected with torsion key I of drum, and every torsion key I all is located the outside of shear force key I and all has the clearance with shear force key I.

The tail part of the joint comprises a cylinder II, a plurality of torque keys II and shear keys II, the torque keys II are arc-shaped plates with the outer diameters being consistent with those of the cylinder II, the torque keys II are connected to one end face of the cylinder II, and the torque keys II are arranged at equal intervals along the circumferential direction of the cylinder II.

The shear key II is of a circular ring structure, the shear key II is fixed on the end face, connected with the torque key II, of the cylinder II, and each torque key II is located on the outer side of the shear key II.

The joint head part and the joint tail part are respectively connected with the two pipe joints, the torsion keys I are respectively embedded into gaps among the torsion keys II, and the shear keys II are embedded into gaps between the shear keys I and the torsion keys I.

The shear key I is connected with the cylinder II through a plurality of prestressed anchor cables, and the shear key II is connected with the cylinder I through a plurality of prestressed anchor cables.

Furthermore, a rubber support is arranged between each torsion key I and the adjacent torsion key II.

Further, a rubber ring is arranged between the shear key I and the shear key II.

Furthermore, a water stop is arranged between the shear key I and the cylinder II, a water stop is arranged between the shear key II and the cylinder I, a plurality of through holes for the prestressed anchor cables to pass through are formed in each water stop, and the prestressed anchor cables pass through the through holes and are sealed.

Furthermore, every torsion key I's evagination all aligns with drum I's outer wall, and every torsion key II's evagination all aligns with drum II's outer wall, and shear force key I's inner wall aligns with drum I's inner wall.

The invention has the beneficial effects that:

1. compared with the traditional immersed tube tunnel joint, the underwater suspension tunnel connecting component changes the structural form of a resistance key, increases a torsion key structure, forms a multi-channel composite water stop structure, and can meet the requirements of vibration and relative displacement deformation generated among underwater suspension tunnel pipe joints in a complex marine environment;

2. the underwater suspended tunnel connecting component uses the plurality of water stopping structures, and the water stopping structures have relative compound action, so that the water stopping structures between the pipe joint joints can always ensure partial action when the pipe fittings move relatively, the requirement of water tightness between the suspended tunnel pipe joints is met, and the pipe joints are prevented from leaking due to dislocation;

3. the underwater suspension tunnel connecting component adopts a semi-flexible semi-rigid connecting concept, wherein the rubber support among the resistance keys provides flexible connection, and the limiting key structure provides rigid connection for the connecting component. The semi-flexible and semi-rigid connection mode can ensure the relative movement and deformation between the pipe joints and can limit the pipe joints from excessive displacement.

Drawings

FIG. 1 is a three-dimensional view of the structure of the present invention;

FIG. 2 is a front view of the structure of the present invention;

FIG. 3 is a three-dimensional view of a joint header;

FIG. 4 is a side view of the header of the fitting;

FIG. 5 is a side view of the tail of the connector;

fig. 6 is a partial cross-sectional view of the structure of the present invention.

In the figure: the joint comprises a joint head part 1, a cylinder I101, a torsion key I102, a shear key I103, a joint tail part 2, a cylinder II 201, a torsion key II 202, a shear key II 203, a rubber support 3, a rubber ring 4, a water stop 5, a pipe joint 6 and a pre-stressed anchor cable 7.

Detailed Description

The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.

Example 1:

the embodiment discloses a suspension tunnel pipe joint structure, which comprises a joint head part 1 and a joint tail part 2.

Referring to fig. 3 or 4, the joint head part 1 comprises a cylinder I101, a plurality of torsion keys I102 and shear keys I103, wherein the torsion keys I102 are arc-shaped plates with the outer diameter consistent with that of the cylinder I101, the torsion keys I102 are connected to one end face of the cylinder I101, the torsion keys I102 are arranged at equal intervals along the circumferential direction of the cylinder I101, and the outer convex surface of each torsion key I102 is aligned with the outer wall of the cylinder I101.

Shear connector I103 is the ring structure, and shear connector I103 is fixed on I101 of drum is connected with the terminal surface of torsion connector I102, and the inner wall of shear connector I103 aligns with the inner wall of drum I101, and every torsion connector I102 all is located the outside of shear connector I103 and all has the clearance with shear connector I103.

Referring to fig. 5, the joint tail portion 2 comprises a cylinder II 201, a plurality of torsion keys II 202 and a shear key II 203, wherein the torsion keys II 202 are arc-shaped plates with the outer diameters consistent with the outer diameter of the cylinder II 201, the torsion keys II 202 are connected to one end face of the cylinder II 201, the torsion keys II 202 are arranged at equal intervals along the circumferential direction of the cylinder II 201, and the outer convex surface of each torsion key II 202 is aligned with the outer wall of the cylinder II 201.

The shear key II 203 is of a circular ring structure, the shear key II 203 is fixed on the end face, connected with the torsion key II 202, of the cylinder II 201, and each torsion key II 202 is located on the outer side of the shear key II 203.

Referring to fig. 1 or 2, the joint head part 1 and the joint tail part 2 are respectively connected with two pipe joints 6, a plurality of torsion keys i 102 are respectively embedded in gaps between a plurality of torsion keys ii 202, and shear keys ii 203 are embedded in gaps between a shear key i 103 and a plurality of torsion keys i 102.

The shear key I103 is connected with the cylinder II 201 through a plurality of prestressed anchor cables 7, the shear key II 203 is connected with the cylinder I101 through a plurality of prestressed anchor cables 7, and the prestressed anchor cables 7 are used for resisting axial loads between the joint head part 1 and the joint tail part 2.

Referring to fig. 6, a rubber support 3 is arranged between each torsion key i 102 and the adjacent torsion key ii 202, and when two pipe joints 6 rotate relatively, the rubber support 3 is stressed to play a role in buffering and damping.

A rubber ring 4 is arranged between the shear key I103 and the shear key II 203, and when the two pipe joints 6 are in relative dislocation, the rubber ring 4 is stressed to play a role in buffering and shock absorption.

The installation rubber support 3 and rubber circle 4 can turn into half rigid semi-flexible joint with the rigidity joint, thereby can reduce the rigidity that connects and reduce local stress, can also play the effect that reduces tube coupling vibration and motion acceleration simultaneously, guarantee the security and the suitability that the tube coupling connects.

A water stop 5 is arranged between the shear key I103 and the cylinder II 201, the water stop 5 is arranged between the shear key II 203 and the cylinder I101, and the water tightness of the pipe joint connector is guaranteed under the condition that the connector is in hydraulic compression joint. Each water stop 5 is provided with a plurality of through holes for the pre-stressed anchor cables 7 to pass through, and the pre-stressed anchor cables 7 pass through the through holes and are sealed.

It is worth explaining that, the suspension tunnel pipe joint structure disclosed in this embodiment can satisfy the vibration and the relative displacement deformation generated between the underwater suspension tunnel pipe joints in the complex marine environment, and the water stop structure provided by the suspension tunnel pipe joint structure can satisfy the water tightness requirement between the suspension tunnel pipe joints, thereby ensuring that the pipe joints do not leak due to dislocation.

Example 2:

Referring to fig. 3 or 4, the joint head part 1 comprises a cylinder I101, a plurality of torsion keys I102 and shear keys I103, wherein the torsion keys I102 are arc-shaped plates with the outer diameter consistent with that of the cylinder I101, the torsion keys I102 are connected to one end face of the cylinder I101, and the torsion keys I102 are arranged at equal intervals along the circumferential direction of the cylinder I101.

The shear key I103 is of a circular ring structure, the shear key I103 is fixed on the end face, connected with the torsion key I102, of the cylinder I101, and each torsion key I102 is located on the outer side of the shear key I103 and has a gap with the shear key I103.

Referring to fig. 5, the joint tail portion 2 comprises a cylinder ii 201, a plurality of torsion keys ii 202 and a shear key ii 203, the torsion keys ii 202 are arc-shaped plates with outer diameters consistent with the outer diameter of the cylinder ii 201, the torsion keys ii 202 are connected to one end face of the cylinder ii 201, and the torsion keys ii 202 are arranged at equal intervals along the circumferential direction of the cylinder ii 201.

The shear key I103 is connected with the cylinder II 201 through a plurality of prestressed anchor cables 7, and the shear key II 203 is connected with the cylinder I101 through a plurality of prestressed anchor cables 7.

Example 3:

the main structure of this embodiment is the same as that of embodiment 2, and further, referring to fig. 6, a rubber support 3 is arranged between each torsion key i 102 and its adjacent torsion key ii 202.

Example 4:

the main structure of this embodiment is the same as that of embodiment 3, and further, referring to fig. 6, a rubber ring 4 is arranged between the shear key i 103 and the shear key ii 203.

Example 5:

the main structure of this embodiment is the same as that of embodiment 4, and further, referring to fig. 6, a water stop 5 is arranged between the shear key i 103 and the cylinder ii 201, a water stop 5 is arranged between the shear key ii 203 and the cylinder i 101, each water stop 5 is provided with a plurality of through holes for the pre-stressed anchor cables 7 to pass through, and the pre-stressed anchor cables 7 pass through the through holes and are subjected to sealing treatment.

Example 6:

the main structure of the embodiment is the same as that of embodiment 5, furthermore, the outer convex surface of each torsion key I102 is aligned with the outer wall of the cylinder I101, the outer convex surface of each torsion key II 202 is aligned with the outer wall of the cylinder II 201, and the inner wall of the shear key I103 is aligned with the inner wall of the cylinder I101.

Claims

1. Suspension tunnel coupling joint structure, its characterized in that: comprises a joint head part (1) and a joint tail part (2);

the connector head part (1) comprises a cylinder I (101), a plurality of torsion keys I (102) and shear keys I (103), wherein the torsion keys I (102) are arc-shaped plates with the outer diameters consistent with that of the cylinder I (101), the torsion keys I (102) are connected to one end face of the cylinder I (101), and the torsion keys I (102) are arranged at equal intervals along the circumferential direction of the cylinder I (101);

the shear key I (103) is of a circular ring structure, the shear key I (103) is fixed on the end face, connected with the torsion key I (102), of the cylinder I (101), and each torsion key I (102) is located on the outer side of the shear key I (103) and has a gap with the shear key I (103);

the joint tail part (2) comprises a cylinder II (201), a plurality of torsion keys II (202) and shear keys II (203), the torsion keys II (202) are arc-shaped plates with the outer diameters consistent with that of the cylinder II (201), the torsion keys II (202) are connected to one end face of the cylinder II (201), and the torsion keys II (202) are arranged at equal intervals along the circumferential direction of the cylinder II (201);

the shear key II (203) is of a circular ring structure, the shear key II (203) is fixed on the end face, connected with the torsion keys II (202), of the cylinder II (201), and each torsion key II (202) is located on the outer side of the shear key II (203);

the joint head part (1) and the joint tail part (2) are respectively connected with a pipe joint (6), a plurality of torsion keys I (102) are respectively embedded into gaps among a plurality of torsion keys II (202), and shear keys II (203) are embedded into gaps among shear keys I (103) and the torsion keys I (102);

the shear key I (103) is connected with the cylinder II (201) through a plurality of prestressed anchor cables (7), and the shear key II (203) is connected with the cylinder I (101) through a plurality of prestressed anchor cables (7);

a rubber support (3) is arranged between each torsion key I (102) and the adjacent torsion key II (202);

a rubber ring (4) is arranged between the shear key I (103) and the shear key II (203);

a water stop (5) is arranged between the shear key I (103) and the cylinder II (201), a water stop (5) is arranged between the shear key II (203) and the cylinder I (101), a plurality of through holes for the prestressed anchor cables (7) to penetrate through are formed in each water stop (5), and the prestressed anchor cables (7) penetrate through the through holes and are sealed.

2. The suspended tunnel pipe joint structure according to claim 1, wherein: the outer convex surface of each torsion key I (102) is aligned with the outer wall of the cylinder I (101), the outer convex surface of each torsion key II (202) is aligned with the outer wall of the cylinder II (201), and the inner wall of the shear key I (103) is aligned with the inner wall of the cylinder I (101).