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Method for calculating triangular resistance loads of shield tunnel model structure

A technology of model structure and shield tunnel, which is applied in calculation, computer-aided design, special data processing application, etc., can solve the problems that cannot accurately reflect the deformation and stress of segments, and achieve design safety, accurate structural internal force, Effect of Model Structural Safety

Inactive Publication Date: 2016-07-20
SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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Problems solved by technology

[0019] Therefore, the existing calculation method for the resistance load of the shield tunnel model structure cannot accurately reflect the deformation and stress of the segment

Method used

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  • Method for calculating triangular resistance loads of shield tunnel model structure
  • Method for calculating triangular resistance loads of shield tunnel model structure
  • Method for calculating triangular resistance loads of shield tunnel model structure

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Embodiment

[0055] The method for calculating the triangular resistance load of the shield tunnel model structure provided in this embodiment includes the following steps:

[0056] S1. Since the calculation model of the segment structure belongs to the small deformation linear elastic problem, the resistance displacement y at the horizontal diameter of the tunnel ring can be regarded as the superposition of the horizontal deformation caused by the load other than the triangular resistance and the horizontal deformation caused by the triangular resistance load. which is:

[0057] y=U(q 1 ,q G ,e 1 ,e 2 ,g,q w )-U(ky)-----Formula (1)

[0058] Among them, U(q 1 ,q G ,e 1 ,e 2 ,g,q w ) is the horizontal deformation caused by loads other than the triangular resistance, U(kδ) is the horizontal deformation caused by the triangular resistance load; q 1 is the vertical earth pressure at the top, q G is the earth pressure of the back arch, e 1 is the sum of horizontal earth pressure at...

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Abstract

The invention discloses a method for calculating triangular resistance loads of a shield tunnel model structure.The method comprises the steps that S1, due to the fact that a pipe sheet structure calculating model belongs to a small-deformation linear elasticity problem, resistance displacement y at the horizontal diameter position of a tunnel ring can be regarded as superposition of horizontal deformation caused by loads except for triangular deformation and horizontal deformation caused by the triangular resistance loads, y is set to be equal to U(q1, qG, e1, e2, g, qw)-U(ky), all the parameter are substituted into the formula, and a correlation coefficient determined by back arch soil pressure qG is 0.3145; S2, based on correct arc-shaped back arch soil pressure derivation, the coefficient 0.3145 is substituted to the formula, and the set resistance displacement (see the formula in the description) at the horizontal diameter position of the tunnel ring can be obtained.Based on correct arc-shaped back arch soil pressure, the precise triangular resistance displacement calculating formula is derived, a basis is provided for correct calculation of the internal force of the shield tunnel model structure, and the technical problem that an existing triangular resistance displacement calculating formula does not conform to the tunnel back arch soil pressure shape is solved.

Description

technical field [0001] The invention relates to a calculation method for triangular resistance load of a shield tunnel model structure. Background technique [0002] With the development of computer technology and computational mechanics, most of the internal force calculations of tunnel segment structures using the shield tunneling method currently use the modified customary method. The modified idiom is a two-dimensional structural computational model, and the solid model can be a planar two-dimensional model or a three-dimensional model. [0003] The modified idiom assumes that the model structure is an elastic homogeneous body, and considering the existence of circumferential joints, the overall bending stiffness of the ring is reduced, and the bending stiffness of the ring is taken as ηEI. Correct the loads on the tunnel model structure in the usual usage such as figure 1 shown, including the top vertical earth pressure q 1 , back arch earth pressure q G , top and b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/367G06F2113/14
Inventor 包鹤立姜弘
Owner SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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