Numerical Simulation and Analysis of Advance Pre-support for Underground Cross-street Tunnel

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Lijuan, Sun^1 ; Ziqi, Jiang^2 ; Bingwei, Liu^2

Zhengzhou Railway VocationalandTechnical College, Zhengzhou

450052, China^1

Henan Provincial Communications Planning and Design Institute Co., Ltd, Zhengzhou

450052, China^2

关键词: Displacement curve;    Excavation process;    Finite element software;    Practical engineering;    Simulation and analysis;    Structural stress;    Tunnel construction;    Tunnel excavation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/4/042007/pdf
DOI  :  10.1088/1755-1315/267/4/042007

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this paper, the excavation process of a cross-street tunnel construction is studied. In order to ensure the normal construction, three kinds of advanced support combination schemes are preliminarily worked out. Scheme one: leading anchor pipe + sleeve driving small pipe Grouting; Scheme two: horizontal rotary jet grouting piles+ sleeve driving small pipe grouting; scheme three: horizontal rotary jet grouting piles+ large pipe shed+ sleeve driving small pipe grouting; Combined with the existing practical engineering cases, using the finite element software ANSYS to simulate the tunnel excavation process and verify the results, the settlement and displacement curves of the surface and vault and the convergence time history curves of the side walls are compared, and the effect of structural stress control is analysed. Among them, the third scheme has great advantages. Therefore, considering all factors, the third scheme is adopted as the pre-support scheme of the tunnel.