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Calculation Method of Internal Force and Relative Deformation of Circular Shield Tunnel Based on State Space Method

A state-space method and shield tunneling technology, applied in computing, computer-aided design, design optimization/simulation, etc., can solve problems such as large computing resources, long modeling time, and trouble

Active Publication Date: 2021-02-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current shield tunnel design method is either based on the force method or the displacement method, which brings troubles when dealing with the shield segment joints and the loads related to the shield segment displacement.
The finite element method can meet the needs of fine simulation of shield tunnels, but it has the disadvantages of consuming many computing resources and long modeling time

Method used

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  • Calculation Method of Internal Force and Relative Deformation of Circular Shield Tunnel Based on State Space Method
  • Calculation Method of Internal Force and Relative Deformation of Circular Shield Tunnel Based on State Space Method
  • Calculation Method of Internal Force and Relative Deformation of Circular Shield Tunnel Based on State Space Method

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Embodiment 1

[0163] A method for calculating the internal force and relative deformation of a circular shield tunnel based on a state-space method, comprising the following steps:

[0164] (1) The curve coordinate system is established with the curve in the lining of the circular shield tunnel. The curve in the lining is the circular curve at the middle position between the inner circumference and the outer circumference of the circular shield tunnel. The circular shield tunnel consists of multiple It is composed of radian shield segments, and the curve coordinate system takes the bottom of the curve in the lining as the coordinate origin;

[0165] (2) The loads on the circular shield tunnel include active load and passive load. Among them, the active load is the vertical soil pressure on the top of the tunnel and the horizontal soil pressure on both sides of the tunnel, and the passive load is the soil reaction. The soil reaction force of the circular shield tunnel includes the soil react...

Embodiment 2

[0190] A method for calculating the internal force and relative deformation of a circular shield tunnel based on a state-space method, comprising the following steps:

[0191] (1) The curve coordinate system is established with the curve in the lining of the circular shield tunnel. The curve in the lining is the circular curve at the middle position between the inner circumference and the outer circumference of the circular shield tunnel. The circular shield tunnel consists of multiple It is composed of radian shield segments, and the curve coordinate system takes the bottom of the curve in the lining as the coordinate origin;

[0192] (2) The loads on the circular shield tunnel include active loads and passive loads, where the active load is the vertical soil pressure on the top of the tunnel and the horizontal soil pressure on both sides of the tunnel, and the passive load is the soil reaction The soil reaction force of the circular shield tunnel includes the soil reaction f...

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Abstract

The invention discloses a method for calculating the internal force and relative deformation of a circular shield tunnel based on a state space method. The method comprises the following steps: a curvilinear coordinate system is established by a curvilinear middle curve of a circular shield tunnel lining, and the bottom of the curvilinear middle curve of the lining is taken as a coordinate origin;The load of circular shield tunnel includes active load and passive load. A, when the soil reaction force related to lining displacement is not considered, the state vectors at each position of the whole lining are calculated successively. B, when considering the soil reaction force p6 (the soil reaction force on both sides of the tunnel) related to the lining displacement, the state vector of each position of the whole lining is obtained by adjusting and calculating, the state vector includes the internal force and the displacement, and the relative deformation is obtained by calculating thedisplacement. The calculation method of the invention can improve the calculation efficiency of the shield tunnel structure, can cope with flexible shield segment joint distribution and load distribution in practical application, and provides an important basis for shield tunnel design.

Description

technical field [0001] The invention relates to the technical field of shield tunnel design, in particular to a method for calculating the internal force and relative deformation of a circular shield tunnel based on a state space method. Background technique [0002] The state-space method makes the complex control equations describing the behavior of structural mechanics into a simple matrix form by using energy dual physical quantities such as internal force and displacement as state variables. It has the characteristics of easy computer programming, high calculation efficiency, and good accuracy. State-space method is widely used in engineering field, but its application in shield tunnel structure analysis has not been reported yet. [0003] The shield tunnel is composed of several continuous shield segments supplemented by joints in the transverse direction. The existence of joints weakens the overall stiffness of the shield segment to a certain extent. The simulation o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F30/20G06F119/14
CPCG06F30/13G06F30/20G06F2119/06
Inventor 徐荣桥黄伟明王金昌杨仲轩
Owner ZHEJIANG UNIV