位移反分析法在隧道不良地质地段的优化应用  

Application of Displacement Back Analysis for Optimizing Tunnel Section with Unfavorable Geology

作　　者：石荔[1] 吴立[1] 

机构地区：[1]中国地质大学(武汉)工程学院,武汉430074

出　　处：《路基工程》2014年第4期22-27,共6页Subgrade Engineering

基　　金：武汉市科技局社会发展科技攻关计划(201160823268)

摘　　要：隧道工程信息化施工应用十分普遍,反演分析是信息化施工的核心内容,位移反分析法作为目前最常用的一种,有它独特的优点。山岭隧道洞口是隧道施工的关键部位,由于施工扰动造成地应力的重分布,它是造成洞口边坡滑动、洞口浅埋段塌方的主要因素。结合油坊坪隧道,根据现场资料和监控量测信息找出了隧道出口的各种不良地质现象,利用有限元分析软件ANSYS中的优化设计模块,对隧道参数进行优化反分析,结合反演结果预测出变形趋势。据此可以反馈原设计方案并进行修正,相应地提出一些针对性的工程技术措施,保障安全。Informatization construction for tunnel engineering is applied widely, wherein the back analysis is the core content, and displacement back analysis that is used most commonly has its unique advantages. Mountain tunnel entrance is a key part in tunnel construction. Due to redistribution of crustal stress caused by construction disturbance, at the entrance, slope sliding and collapse of shallow burying section arose. In relation to the Youfangping Tunnel, various adverse geological phenomena at the entrance were found out according to the on-site data and monitoring measurements; with the optimum design module included in the FEM software, ANSYS, the optimized back analysis was carried out for the tunnel parameters and, depending on the result, the trend of deformation was predicted. Thus feedback was given to the original scheme for the purpose of modification, and some engineering measures were proposed accordingly to ensure the safety. The study method herein may be referred to by similar engineering in future.

关 键 词：隧道 不良地质 位移反分析 优化分析 信息化施工 

分 类 号：U452.11[建筑科学—桥梁与隧道工程]