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Test model of shield tunnel segment joints with different stiffness under action of positive and negative bending moments

A shield tunnel segment and test model technology, which is applied in the field of civil engineering, can solve the problems that the different stiffness of segment joints cannot be considered, and achieve the effects of avoiding assembly work, strong practicability, and simple operation

Active Publication Date: 2020-01-03
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The difficulty of the shield tunnel model test is how to reasonably and effectively describe the segment joints of the shield tunnel, and the existing simulation methods cannot consider the different stiffness characteristics of the segment joints under the action of positive and negative bending moments

Method used

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  • Test model of shield tunnel segment joints with different stiffness under action of positive and negative bending moments
  • Test model of shield tunnel segment joints with different stiffness under action of positive and negative bending moments
  • Test model of shield tunnel segment joints with different stiffness under action of positive and negative bending moments

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Embodiment

[0026] Such as Figure 1-4 As shown, the present invention provides a shield tunnel segment joint test model with different rigidities under the action of positive and negative bending moments, which is used to truly simulate the segment joint prototype model in the model test.

[0027] The shield tunnel segment joint test model includes:

[0028] Segment body 1 and a plurality of reducing grooves provided on the inner and outer surfaces of the segment body 1, the reducing grooves include annular seam reducing groove 2 and longitudinal seam reducing groove 3, and each circular seam reducing groove 2 and longitudinal seam reducing groove Filling bodies 4 are provided in the grooves 3, and the filling bodies 4 are only under pressure, and are disengaged from the side walls of the reducing grooves when subjected to tension, so as to realize different rigidities of the inner and outer surfaces of the segment body 1 .

[0029] The shield tunnel segment joint test model is designed...

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Abstract

The invention relates to a test model of shield tunnel segment joints with different stiffness under the action of positive and negative bending moments. The test model comprises a segment body and aplurality of reducing grooves arranged on the inner and outer surfaces of the segment body, the reducing grooves comprise ring seam reducing grooves and longitudinal seam reducing grooves, each ring seam reducing groove and each longitudinal seam reducing groove are provided with filling bodies, the filling bodies only bear pressure and is separated from the side wall of the grooves when the filling bodies bear tension, so that the different stiffness characteristics of the segment body under the action of positive and negative bending moments are described. Compared with the prior art, the test model of the shield tunnel segment joints with different stiffness under the action of positive and negative bending moments has the advantages of simulating different rigidity, simple structure, strong practicability and the like.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a shield tunnel segment joint test model with different stiffnesses under the action of positive and negative bending moments. Background technique [0002] The shield tunnel is composed of segments connected by bolts. There are many segment joints and the structure is complex. The whole-ring prototype loading test of shield tunnel is expensive, while the multi-ring loading prototype test is almost impossible. Therefore, model tests must be used to analyze the multi-ring interaction of shield tunnels and the multi-working conditions of shield tunnels in complex environments. The difficulty of shield tunnel model tests lies in how to reasonably and effectively describe the segment joints of shield tunnels, and the existing simulation methods cannot consider the different stiffness characteristics of the segment joints under the action of positive and negative bending mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/08G09B25/00
CPCE21D11/083G09B25/00
Inventor 谢东武张清照赵程
Owner TONGJI UNIV
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