基坑开挖引起下卧既有电力隧道变形的控制技术的研究_谢雄耀_郁宏杰_王庆国_王承.pdfVIP

DOI 10.11779/CJGE201401007 9 Φ3000 mm MJS MJS MJS TV441 A 2014 (1972 )E-mail: xiexiongyao@tongji.edu.cn Deformation control of operating tunnels induced by deep excavation of overlying metro 1, 2 1, 2 3 4 XIE Xiong-yao , YU Hong-jie , WANG Qing-guo , WANG Cheng (1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 3. Shanghai Shentong Metro Group Co., Ltd., Shanghai 201103, China; 4. North Region Subsidiary, Shanghai Municipal Electronic Power Company, Shanghai 200072, China) Abstract: The excavation-induced deformation of pipelines is one of the top environmental concerns for excavations in urban areas. The foundation pit at the exit to Yanggao Road Station Exit, which is part of the second stage project of Shanghai Metro line No. 9, overlies a Φ3000 mm-operating power tunnel. To prevent the possible tunnel damage due to the excessive deformation, the soils are strengthened by using the metro jet system (MJS) method, the blocks are constructed by means of the block excavation, and the FEM-based tunnel deformation prediction is adopted. In addition, a real-time tunnel deformation monitoring system consisting o