Open AccessNumerical Simulation and Analysis of Advance Pre-support for Underground Cross-street Tunnel
Author(s) -
Lin Sun,
Jiang Ziqi,
Liu Bingwei
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/267/4/042007
Subject(s) - engineering , excavation , structural engineering , settlement (finance) , finite element method , displacement (psychology) , geotechnical engineering , jet (fluid) , computer simulation , simulation , computer science , psychology , world wide web , payment , psychotherapist , aerospace engineering
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.