摘要
为研究铁路隧道开挖过程中的岩体力学行为,评价隧道稳定性,以西南地区某隧道软岩为研究对象,对其支护结构进行应力监测。根据现场施工状况与监测结果,分析围岩和支护结构的应力状态等信息,进而可以修正设计、优化施工方案,从而确保结构稳定性和隧道安全;同时采用二维有限元Phase进行数值模拟,计算钢拱架及钢筋混凝土的安全系数,判断支护结构的稳定状态。研究的方法、结论可为类似条件下隧道工程的设计、施工、监测和进一步的理论研究提供参考和借鉴,具有一定的工程应用价值。
In order to analyze the mechanical behavior of rock mass during excavation of railway tunnel and evaluate the stability of tunnel,we analyzed the stress monitoring data of a soft rock tunnel support structure in southwest China.The results were adopted to evaluate the state of surrounding rock and supporting structure,which is very useful to improve the design scheme and optimize the construction scheme and ensure the structural stability and security of tunnels.The safety coefficient of steel arch frame and reinforced concrete is calculated by using two dimensional finite element of phase,the stable state of the support structure is also verified.The method and conclusion of this paper can provide reference for the design,construction,monitoring and further theoretical study of tunnel engineering under similar conditions,which has certain engineering application value.
作者
陈锦涛
韩爱果
任光明
CHEN Jintao;HAN Aiguo;REN Guangming(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, Sichuan 610059, China)
出处
《水利与建筑工程学报》
2018年第1期178-182,共5页
Journal of Water Resources and Architectural Engineering
关键词
地下工程
软岩隧道
应力监测
支护结构
安全系数
underground engineering
soft rock tunnel
stress monitoring
supporting structure
safety factor
