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Shield tunnel internal force calculation method based on simulation joint model

A technology of shield tunneling and calculation method, which is applied in the field of engineering and construction, can solve problems such as large errors in calculation results, and achieve the effects of improving efficiency, improving calculation efficiency, and improving design benefits

Active Publication Date: 2020-03-24
SOUTHWEST JIAOTONG UNIV +1
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  • Description
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  • Application Information

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Problems solved by technology

The establishment process of the finite element structure of the homogeneous ring model is relatively simple, but the model is quite different from the actual situation, and the error of the calculation result is large
The simulated joint model considers the effects of segment division and joint stiffness, and the calculation results are more accurate. However, when calculating the internal force of the structure, the processing of segment division and joints greatly increases the complexity of the model.

Method used

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  • Shield tunnel internal force calculation method based on simulation joint model
  • Shield tunnel internal force calculation method based on simulation joint model
  • Shield tunnel internal force calculation method based on simulation joint model

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Embodiment

[0069] Please refer to Figure 1 to Figure 8 , this embodiment provides a method for calculating the internal force of a shield tunnel based on a simulated joint model, specifically as follows:

[0070] S1. Input the shield tunnel structure parameters and the stratum parameters where the tunnel is located in MATLAB;

[0071] The structural parameters of the shield tunnel are as follows:

[0072] The number of segment standard blocks n=3, the center angle corresponding to the capping block α=22°, the center angle β=79° corresponding to the adjacent block, the center angle γ=60° corresponding to the standard block, and the outer diameter of the tunnel D= 6m, segment thickness d=0.3m, width l=1.2m, concrete weight γ c =26kN / m 3 , Tunnel depth h 0 =9.934m;

[0073] The formation parameters are as follows:

[0074] Depth of groundwater table h w =1.6m; number of formation layers n s = 3; Formation thickness h 1 = 1m, h 2 =7m, h 3 =30m; Formation weight γ 1 =19.4kN / m 3 ...

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Abstract

The invention discloses a shield tunnel internal force calculation method based on a simulation joint model, and relates to the technical field of engineering construction. The shield tunnel internalforce calculation method utilizes MATLAB software and ANSYS software to carry out combined calling, utilizes MATLAB to carry out pretreatment work such as stratum repartitioning, segment partitioningand segment calculation unit partitioning, calculates and outputs the internal force of the structure by utilizing ANSYS, adopts a simulation joint model for shield tunnel internal force calculation,can obtain a final calculation sheet only by inputting initial engineering parameters into MATLAB software, achieves automation of shield tunnel internal force calculation, greatly improves the efficiency of structural internal force calculation, and provides a way and thought for automatic calculation of internal force of a shield tunnel and other underground structures.

Description

technical field [0001] The invention relates to the technical field of engineering construction, in particular to a method for calculating the internal force of a shield tunnel based on a simulated joint model. Background technique [0002] The shield tunneling method is currently the main construction method for subway construction. How to use efficient calculation methods to design a tunnel structure that meets the requirements has become the top priority of subway construction. [0003] At present, the main domestic design method is to calculate the surrounding rock pressure according to the Terzaghi loosening earth pressure formula, and apply the surrounding rock pressure on the structural model in the finite element software, and finally use the internal force and deformation of the structure calculated by the software to guide Tunnel structure design. When calculating the surrounding rock pressure, it needs to be calculated layer by layer according to the stratum cond...

Claims

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Application Information

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IPC IPC(8): G06F30/13G06F30/23
CPCY02T90/00
Inventor 晏启祥陆志明张君臣伍旺宋修元康洪信郑鹏飞
Owner SOUTHWEST JIAOTONG UNIV
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