Water-conveyance tunnel simulating method based on mixed model

Abstract

The invention relates to a water-conveyance tunnel simulating method based on a mixed model in the technical field of tunnel construction. The method comprises the following steps of: simulating the initial working condition after establishing a mixed three-dimensional finite element model of the tunnel and adding soil and the initial stress of a duct piece so as to obtain the initial state of anestablished tunnel; and then, adding an external simulation condition to the mixed three-dimensional finite element model of the tunnel in the initial state and then calculating through a nonlinear finite element displaying method LS-DYNA to obtain a model response to realize the simulation of the tunnel. The invention can obtain the response rule of the integral structure of the tunnel and analyze the key parts at the key position in detail; and meanwhile, integral equivalent calculation can be carried out firstly to obtain a local danger part or to specify the local danger part according tothe previous construction experience.

Description

technical field [0001] The invention relates to a method in the technical field of tunnel construction, in particular to a method for simulating a water delivery tunnel based on a mixed model with a scale of more than two million units. Background technique [0002] Because shield tunneling construction technology can minimize the impact on other urban facilities, it has become the main form of urban tunnel construction in various countries around the world. Shield technology is also used in subway construction in Shanghai, Beijing, Guangzhou, Nanjing, Shenzhen and other places in my country. The construction of shield tunnels in urban environments directly affects the safety of urban buildings and people. Therefore, various aspects need to be considered, such as shield machine tunneling technology, segment assembly technology, and surface settlement during construction. Many factors, including geological conditions and construction technology, affect the quality and safety...

AI Technical Summary

Problems solved by technology

The calculation accuracy of this kind of method is greatly affected by the separation position of the local refinement model, and the data processing is complicated and cumbersome when calculating multiple working conditions, and the model and method do not consider the influence factors of the tunnel as a whole on the local area, which is completely inconsistent with the actual situation , seriously affecting the accuracy of the numerical simulation

Therefore, there is no mature numerical simulation method that can realize both global analysis and local accurate analysis in the analysis of ultra-large-scale tunnels.

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