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Shield tunnel longitudinal joint structure in high-intensity earthquake active fault area

A technology of active faults and shield tunnels, which is applied in tunnels, tunnel linings, underground chambers, etc., can solve problems such as large shear and tension forces at longitudinal joints, complex stratum forces, and damage to longitudinal joints of shield tunnels, achieving improved The ability to resist seismic loads, increase flexibility, and easy-to-achieve effects

Active Publication Date: 2021-10-15
SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in high-intensity earthquake areas and areas where active faults exist, the forces generated by the relative displacement of the strata and the seismic load are extremely complex, often making the longitudinal joints bear large shear and tension forces.
[0010] The longitudinal joints of the existing shield tunnel segment linings have limited shear and tensile deformation capabilities, and are prone to damage to joint bolts and lining structures during earthquakes
[0011] For example, the 1995 Hanshin earthquake in Japan caused significant damage to the longitudinal joints of a large number of shield tunnels, making the tunnels unusable

Method used

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  • Shield tunnel longitudinal joint structure in high-intensity earthquake active fault area
  • Shield tunnel longitudinal joint structure in high-intensity earthquake active fault area
  • Shield tunnel longitudinal joint structure in high-intensity earthquake active fault area

Examples

Experimental program
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Effect test

Embodiment

[0041] like Figure 1 to 6 , The longitudinal joint structure highly seismic active fault region tunnel, the screw 8 comprises a plurality of reinforced concrete segment 1 and disposed in parallel; each screw 8 are disposed on two adjacent reinforced concrete segment 1 between two adjacent reinforced concrete segments 1 are connected to.

[0042] Wherein each of the reinforced concrete segment 1 is provided with a tapered hole position of the screw bolt 8 from the outside are successively comprising communication 3, the bolt hole 2 and the bolt mounting the hand guide hole 5;

[0043] Each end of the tapered bolt holes 3 are larger than the pore diameter of the tapered bore of the other end of the aperture, the larger end of the aperture positioned adjacent to two reinforced concrete segment 1 of the connection surface, the smaller the aperture the bolt end of hand hole 2 connect;

[0044] Large aperture at one end of each of the tapered aperture of the bolt holes 3 are smaller por...

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Abstract

The invention discloses a shield tunnel longitudinal joint structure in a high-intensity earthquake active fault area. The shield tunnel longitudinal joint structure comprises a plurality of screw rods; a conical bolt hole, a bolt hand hole and a bolt mounting pilot tunnel which are in communication with one another are sequentially formed in the position, where a screw rod is arranged, of each reinforced concrete segment from outside to inside; each conical bolt hole is a conical hole with the aperture of one end larger than that of the other end; the aperture of one end with a larger aperture of each conical bolt hole is two times or more the aperture of one end with a smaller aperture; a conical rubber sleeve is arranged between each conical bolt hole and the corresponding screw rod; the parts, located in the corresponding bolt hand hole, of the two ends of each screw rod are fastened through nuts and provided with gasket sets; and each gasket set comprises a rubber gasket, a spring and two steel gaskets which are arranged at two ends of the spring separately and are used for clamping the spring. According to the structure, a shield tunnel lining structure can well adapt to stratum deformation, and the requirement for construction of a shield tunnel in an area where stratum uneven deformation is prone to occurr is met.

Description

Technical field [0001] Technical Field The present invention relates to shield tunnel construction, in particular, it relates to a shield tunnel longitudinal joint highly seismic active fault zone. Background technique [0002] In recent years, urban rail transit construction in full swing, the city subway shield tunnel construction tunnel structure in the form of a widely used. With the rapid development of the city subway shield tunnel construction revealed some new problems. Wherein, in the shield tunnel through the active fault generating region like the formation of local uneven settlement, because the displacement between adjacent ring liner, stretching and deformation action caused by seismic loading of longitudinal connecting bolts and partial damage to the tube sheet happens sometimes. [0003] Status of related art in this field: [0004] Conventional longitudinal joints in shield tunnel segments provided with a longitudinal bolt holes, realized using steel bolts connec...

Claims

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Application Information

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IPC IPC(8): E21D11/08E21F17/00
CPCE21D11/08E21D11/083E21F17/00
Inventor 张中杰张广超杨波王春凯胡稳殷文涛
Owner SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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