STUDY OF METRO STATION DEFORMATION REGULARITY BASED ON DEFLECTION DISTRIBUTION CONTROL METHOD
HU Shimin1，WANG Mengshu2，ZHANG Li1，ZHANG Xiaowei1，GUO Ting1
(1. Beijing Urban Engineering Design and Research Institute Co.，Ltd.，Beijing 100037，China；
2. Research Center of Tunneling and Underground Engineering，Beijing Jiaotong University，Beijing 100044，China)
Abstract：Taking the metro station in Beijing as the project background，the study of stratum displacement has been performed based on the deflection distribution control method. The effective control measures are proposed to reduce the impact on the surrounding environment. The results show：(1) Mechanical response of the pile-beam- arch(PBA) method between strata and station structure can be divided into four processes of unloading-loading，the pilot excavation and support and supporting arch are the key points which caused surface subsidence. (2) Before pilot excavation，the surrounding strata is reinforced timely by advanced grouting. The measures are performed such as malposition excavation，short footage and tough supporting to reduce the adverse impact on the surrounding environment. (3) The stress adjustment is performed between formation and station structure in the supporting arch stage. The structure would produce a certain coordination deformation and long stress adjustment process. Due to larger settlement rate，the measures are suggested such as setting the horizontal steel support，short footage and reinforcement strata. (4) The range of plastic zone around station increases gradually with the construction development，especially pilot excavation and supporting arch stage. (5) Comparison of surface settlement rate of four construction stages，the numerical calculation rate is 4.5∶1∶6∶1 and the in-situ monitoring rate is 4.3∶1.6∶5∶1，the results show they are consistent.
扈世民1，王梦恕2，张 丽1，张小伟1，郭 婷1. 基于变位分配法地铁车站变形规律研究[J]. 岩石力学与工程学报, 2013, 32(2): 258-265.
HU Shimin1，WANG Mengshu2，ZHANG Li1，ZHANG Xiaowei1，GUO Ting1. STUDY OF METRO STATION DEFORMATION REGULARITY BASED ON DEFLECTION DISTRIBUTION CONTROL METHOD. , 2013, 32(2): 258-265.
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2013, Vol. 32 
