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Shield tunnel segment lining structure of stratum junction section and design method

A shield tunnel segment and design method technology, which is applied in the field of shield tunnel segment lining structure and design at the stratum junction, can solve the problems of longitudinal joint damage between rings, large longitudinal deformation, uneven stress, etc., and reduce deformation , Improve the rigidity, improve the effect of safety

Active Publication Date: 2018-09-25
SOUTHWEST JIAOTONG UNIV +1
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Problems solved by technology

[0007] Aiming at the above-mentioned deficiencies of the prior art, the present invention provides a method that can solve the excessive longitudinal deformation of the shield tunnel segment lining structure, uneven stress concentration, and damage to the longitudinal joint between rings in the prior art. The Segment Lining Structure and Design Method of Shield Tunnel Segment in the Stratum Junction Section

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  • Shield tunnel segment lining structure of stratum junction section and design method
  • Shield tunnel segment lining structure of stratum junction section and design method
  • Shield tunnel segment lining structure of stratum junction section and design method

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with accompanying drawing:

[0034] Such as figure 1 As shown in , it is a schematic structural diagram of the segment lining structure of the shield tunnel at the strata interface.

[0035] The shield tunnel segment lining structure at the stratum junction section of the present invention includes a junction section 1, the junction section 1 of the lining structure is located at the junction of soft and hard strata, and the two sides of the junction section 1 are conventional pipe sections 2, and the conventional pipe sections 2 are respectively arranged on the hard and soft ground. within the strata.

[0036] The stiffness of the longitudinal joint bolts 11 between adjacent segment rings on the junction section 1 is greater than that on the conventional pipe section 2; optionally, the number and size of the longitudinal joint bolts 11 between adjacent segment rings on the junction section 1 are grea...

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Abstract

The invention discloses a shield tunnel segment lining structure of a stratum junction section and a design method. The shield tunnel segment lining structure comprises a junction section, conventional pipe sections are arranged on the two sides of the junction section, and the rigidity of a longitudinal joint bolt between every two adjacent segment rings on the junction section is higher than therigidity of each longitudinal joint bolt of the conventional pipe sections. The design method comprises the steps of establishing a longitudinal finite element numerical calculation model of a shieldtunnel, taking tunnel lining segments as concrete segments, and calculating the longitudinal sediment amount and the longitudinal deformation curve radius generated by the stratum junction section. According to the shield tunnel segment lining structure and the design method, the problem that in the prior art, the longitudinal deformation of a shield tunnel segment lining structure of the soft-hard stratum junction section is too large, the non-uniform stress is concentrated, and inter-ring longitudinal joints are damaged can be effectively solved.

Description

technical field [0001] The invention relates to the field of tunnel engineering, in particular to a segment lining structure and a design method of a shield tunnel segment at a stratum boundary section. Background technique [0002] A shield tunnel is a flexible structure in which segment rings are connected by ring-to-ring joints in the longitudinal direction. In the transition zone of the tunnel from hard ground to soft ground, due to differences in the degree of settlement and consolidation of the underlying strata of different properties, it is easy to make Large longitudinal uneven settlement occurred in the tunnel. [0003] Concrete segments are extruded and twisted against each other under the action of settlement deformation of different sizes, resulting in excessive local stress of the segments, cracking of corners, staggering between rings, and opening deformation. Existing studies have pointed out that the smaller the longitudinal settlement radius R of the tunne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/08E21D11/15
CPCE21D11/08E21D11/083E21D11/155Y02T90/00
Inventor 何川王士民陈健王承震杨赛舟王焕包雨生李占先
Owner SOUTHWEST JIAOTONG UNIV
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