城区大断面浅埋小净距隧道全断面开挖条件下围岩力学特性分析

Distribution of Surrounding Rock Pressure of Urban Shallow Highway Closely Adjacent Tunnels with Large Section

文章对全断面开挖条件下大断面浅埋小净距公路隧道的施工过程进行了动态数值模拟。探讨了考虑小净距隧道洞室开挖施工工序对围岩压力的分布、发展规律及其特征的影响,为更加合理和安全的围岩压力计算以及支护结构设计提供支持,并对类似工程的施工安全、质量及进度管控工作具有一定的指导意义。

This paper presents a dynamic numerical simulation of the construction process of a large-section shallow buried highway tunnel with small clear distance under the condition of full-section excavation.This paper discusses the influence of excavation procedure of tunnel with small clear distance on the distribution,development law and characteristics of surrounding rock pressure,which provides support for more reasonable and safe calculation of surrounding rock pressure and design of support structure,and has certain guiding significance for construction safety,quality and schedule control of similar projects.