CN-122013814-A - Immersed tube tunnel section joint structure and immersed tube tunnel pipe section

CN122013814ACN 122013814 ACN122013814 ACN 122013814ACN-122013814-A

Abstract

The invention relates to the technical field of immersed tube tunnels, in particular to an immersed tube tunnel segment joint structure and an immersed tube tunnel tube segment, wherein the immersed tube tunnel segment joint structure is used for connecting a first segment and a second segment which are adjacent to the same tube segment and comprises a socket end, a first support and a second support, wherein the socket end is arranged at one end of the first segment; the socket comprises a socket end, a steel sleeve ring, a socket end, a sealing ring and a plug unit, wherein the steel sleeve ring is fixedly arranged on the outer peripheral surface of the socket end, extends out of the end part of the socket end, forms a slot structure in the steel sleeve ring, the socket end is arranged at one end of the second section, the socket end is plugged with the slot structure, the sealing ring is arranged on the outer peripheral side of the socket end, and is abutted with the inner surface of the steel sleeve ring, and the plug unit is arranged between the socket end and the socket end. The joint structure provided by the invention can avoid matching pouring technology on the basis of ensuring waterproof effect, further avoid joint hidden diseases caused by high pouring quality requirement in the matching pouring process, reduce construction difficulty and improve construction efficiency.

Inventors

LV YONGGANG
DENG BIN
QIN HUIHUI
XU GUOPING
HUANG QINGFEI
SUN SHUO
JI HAI
ZHONG XIAODONG

Assignees

中交公路规划设计院有限公司

Dates

Publication Date: 20260512
Application Date: 20260213

Claims (14)

1. A immersed tube tunnel segment joint structure for connecting first and second segments adjacent to the same tube segment, the joint structure comprising: a socket end (1) arranged at one end of the first section; the steel sleeve ring (2) is fixedly arranged on the outer peripheral surface of the socket end (1), the steel sleeve ring (2) extends out of the end part of the socket end (1), and a slot structure is formed in the steel sleeve ring (2); the socket end (3) is arranged at one end of the second section, and the socket end (3) is spliced with the slot structure; A seal ring (5) arranged on the outer peripheral side of the socket end (3), wherein the seal ring (5) is in contact with the inner surface of the steel sleeve ring (2); Wherein a plug-in unit (4) is arranged between the socket end (1) and the spigot end (3).
2. A immersed tube tunnel segment joint structure according to claim 1, characterized in that the outer circumferential surface of the socket end (3) is provided with a thinning structure (31), the thinning structure (31) causing the socket end (3) to be in a clearance fit with the socket structure; wherein, sealing washer (5) set up in the periphery side of attenuate structure (31).
3. A immersed tube tunnel segment joint structure according to claim 2, wherein the outer peripheral side of the thinned structure (31) is provided with a first mounting groove (34), and the sealing ring (5) is mounted in the first mounting groove (34).
4. A immersed tube tunnel segment joint structure according to claim 2, characterized in that the socket end (3) is provided with a grouting channel (33), which grouting channel (33) penetrates the floor of the socket end (3) for grouting the rock-soil body below the junction of the socket end (3) and the socket end (1).
5. A immersed tube tunnel segment joint structure according to claim 4, wherein the bottom of the grouting channel (33) is located at the thinned structure (31) and at the end of the steel collar (2) remote from the socket end (1).
6. Immersed tube tunnel segment joint structure according to claim 1, wherein the plug-in unit (4) comprises: A first sleeve (41) provided on the end surface of the socket end (1); A second sleeve (42) which is provided on the end surface of the socket end (3) and is provided opposite to the first sleeve (41); And one end of the shear rod (43) is inserted into the first sleeve (41), and the other end of the shear rod (43) is inserted into the second sleeve (42).
7. A submerged pipe tunnel segment joint structure according to claim 6, characterized in that one end of the shear rod (43) is provided with a plastic sleeve (44), which plastic sleeve (44) is inserted in the first sleeve (41) or the second sleeve.
8. A submerged pipe tunnel segment joint structure according to any of claims 1-7, characterized in that the end face of the socket end (1) is provided with a second mounting groove (11) in a circumferential direction, further comprising an elastic sealing gasket (6) arranged in the second mounting groove (11), a part of the elastic sealing gasket (6) protruding outside the second mounting groove (11) and abutting against the end face of the socket end (3).
9. A immersed tube tunnel segment joint structure according to any one of claims 1-7, wherein a first groove (12) is circumferentially arranged on the inner side of the socket end (1), a second groove (32) is circumferentially arranged on the inner side of the spigot end (3), the first groove (12) is in communication with the second groove (32), and a water stop assembly (7) is further included, the water stop assembly (7) being arranged in the first groove (12) and the second groove (32) for sealing the inner side of the gap between the socket end (1) and the spigot end (3).
10. A immersed tube tunnel segment joint structure according to any one of claims 1-7, wherein a joint of an end face of the socket end (1) and the steel collar (2) is provided with a sealing glue (8).
11. Immersed tube tunnel segment joint structure according to any one of claims 1-7, wherein anchoring ribs (13) are pre-embedded inside the socket end (1), and the steel collar (2) is connected with the anchoring ribs (13).
12. The immersed tube tunnel segment joint structure according to claim 11, wherein two water-swellable rubber strips (22) are arranged on the inner surface of the steel sleeve ring (2), the two water-swellable rubber strips (22) are abutted against the outer peripheral side of the socket end (1), and the two water-swellable rubber strips (22) are respectively positioned on two sides of the anchor bar (13) along the axial direction of the steel sleeve ring (2).
13. Immersed tube tunnel segment joint structure according to any one of claims 1-7, wherein a rubber plate (10) is arranged between the socket end (1) and the spigot end (3).
14. A immersed tube tunnel pipe joint, comprising: A plurality of segments, a plurality of segments being arranged in sequence along the extension direction of the pipe section, the segments being provided with communication holes along the extension direction of the segments, adjacent two of the segments being connected by a immersed tube tunnel segment joint structure according to any one of claims 1-13; and a prestressed steel bundle (9) penetrating through the communication holes of the plurality of segments for connecting the plurality of segments in the extending direction of the pipe joint.

Description

Immersed tube tunnel section joint structure and immersed tube tunnel pipe section Technical Field The invention relates to the technical field of immersed tube tunnels, in particular to an immersed tube tunnel segment joint structure and an immersed tube tunnel tube section. Background The immersed tube tunnel is an underwater tunnel constructed by an immersed tube method. The sinking pipe method is a short term of a prefabricated section sinking method, is a construction method of a tunnel in a water bottom building, and is characterized in that a plurality of prefabricated pipe sections are respectively floated to a water surface construction site, the pipe sections are arranged in a dredged underwater foundation trench in a sinking mode one by one, and the pipe sections are connected through joint structures among the pipe sections to form a complete tunnel structure. The structural form of the immersed tube tunnel pipe joint is mainly divided into three types of flexible pipe joints (segmental), rigid pipe joints (integral) and semi-rigid pipe joints. The flexible pipe joint is formed by dividing a pipe joint into a plurality of small sections, the steel bars among the small sections are discontinuous, the shearing-resistant and water-stopping devices are arranged at joints of the sections, and the rigid pipe joint is formed by integrally casting the pipe joint and is of a continuous complete structure in the longitudinal direction. The semi-rigid pipe section scheme is characterized in that the semi-rigid pipe section is arranged between the rigid pipe section and the flexible pipe section, the plurality of sections are connected into one pipe section by prestress based on the flexible pipe section scheme, but prestressed steel bars are not sheared after installation is completed, the vertical shearing capacity of the section joint is improved by utilizing friction force generated by positive pressure between the sections, the opening amount of the section joint is reduced, and the waterproof performance of the water stop belt is improved. The flexible pipe joint and the semi-rigid pipe joint have better adaptability to the stratum of the tunnel substrate, wherein the joint of the sections is a key technical link, and the pouring quality of the joint structure directly influences the safety, the waterproof performance and the service life of the tunnel structure. At present, the immersed tube tunnel section joints all adopt a middle-buried water stop as one of main water stop structures, and because the middle-buried water stop needs to be buried in two adjacent small sections respectively, the small sections of the tube section need to adopt a matching pouring process, namely, the end faces of the adjacent small sections are used as pouring templates of the second section. When the pipe joint adopts a matched pouring process, a larger pouring site is needed, and the pouring efficiency is low, so that the engineering economy is reduced. In addition, the traditional segment joint often adopts a shear key as a shear-resistant structure, namely, the end surfaces of adjacent pipe segments are respectively provided with the shear key and corresponding shear key grooves, and the connection between the pipe segments and the transmission of shear load are realized through the matching and the grafting of the shear key and the grooves. Practice shows that the shear key, the shear groove and other narrow spaces have complex structures, the quality control is difficult in the matching pouring process, hidden diseases such as pouring incompact and the like are easy to occur, and the joint position is difficult to discover and repair, so that the potential water leakage risk exists, and therefore, an extremely high construction control process is required to meet engineering requirements, and the construction difficulty is remarkably increased. Disclosure of Invention The invention provides a immersed tube tunnel segment joint structure and an immersed tube tunnel tube segment, which can avoid matching pouring processes on the basis of guaranteeing waterproof effect, further avoid joint hidden diseases caused by high pouring quality requirements in the matching pouring process, reduce construction difficulty and improve construction efficiency. The invention provides a immersed tube tunnel segment joint structure which is used for connecting a first segment and a second segment which are adjacent to the same tube segment, and comprises a socket end, a first joint and a second joint, wherein the socket end is arranged at one end of the first segment; the socket comprises a socket end, a steel sleeve ring, a socket end, a sealing ring and a plug unit, wherein the steel sleeve ring is fixedly arranged on the outer peripheral surface of the socket end, extends out of the end part of the socket end, forms a slot structure in the steel sleeve ring, the socket end is arranged at one end of the second section, the socket