Dynamic Optimization Research on the Section Morphology of Large-span Tunnels in Shallow Rock Mass

Wang Hui,Wang Qing-Biao

doi:10.2174/1874836801509010210

Abstract

The optimization design of the section morphology of large-span tunnels plays an important role for saving cost and improving the engineering stability. The flat ratio of tunnel which is as an important control index, its rationality is the key problem in the design of tunnels. Program with Python to set up the dynamic calculation model of a large-span tunnel planned to be constructed which can be run and analyzed in ABAQUS. The MATLAB language is used to compile the optimization analysis program based on genetic algorithm, and then the dynamic calculation model is embedded into it. Using excavation area, plastic zone, ground surface settlement, vault subsidence, etc. as optimal objective to make dynamic analysis for the model and put forward the reasonable flat ratio of the supported project. The result of this paper provides reference for the section optimization design of similar tunnel engineering.

Highlights

With the rapid development of China, three-lane andA four-lane highway tunnel engineering in single hole is increasing
The result of this paper provides reference for the section optimization design of similar tunnel engineering
From the current situation, due to many complex factors which affect the stability of the surrounding rock

Summary

INTRODUCTION

A four-lane highway tunnel engineering in single hole is increasing. But from the current situation, due to many complex factors which affect the stability of the surrounding rock. Problems exist in the structure design, construction and other aspects of super-large section tunnel. A and the stability of surrounding rock in the tunnel construction process [1]. E lished different calculation models to seek for the optimal Rdesign scheme of the tunnel structure section size [4]. The choice of tunnel cross section is a comprehensive process which should be considered the economy, safety, technology and other factors. Based on this idea, Program with Python to set up the dynamic calculation mode of a large-span tunnel planned to be constructed which can be run and analyzed in ABAQUS. Plastic zone, ground surface settlement, vault subsidence, etc. as optimal objective to make dynamic analysis for the model and put forward the reasonable flat ratio of the supported project

Dynamic Tunnel Model

Parameter Optimization Model

E Optimal result

CONCLUSION

CONFLICT OF INTEREST