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《Journal of Highway and Transportation Research and Development》 2005-08
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Monitoring and Back Analysis of Displacement of Jing-zhu Expressway Wenquan Tunnel

YAN Jingya,ZHANG Zixin,HUANG Hongwei(Department of Geotechnical Engineering,Tongji University,Shanghai200092,China)  
The paper presents the monitoring system of Wenquan tunnel of Jingzhu expressway analysis of the monitoring data,such as the convergence,crown displacement,internal displacement and back analysis were performed using the displacement back analysis program BMP90,with the equivalent elasticity modulus and lateral load factor obtained by the analysis. The paper also predicts the stability of the tunnel surrounding rock. And 2D elastic finite element analysis was adopted using the elasticity modulus obtained by back analysis.The computing results were compared with the survey data insitu.The results show that the selection of ground factors of back analysis results is important. For equivalent elasticity modulus,the lasttime result or lesser value is close to the fact. And global regression value should be selected for lateral load factor. The accuracy of the solutions based on the FEM is good compared with those survey data insitu.
【Fund】: 交通部九五科技攻关重点资助项目
【CateGory Index】: U456.3
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