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区间隧道零距离下穿既有地铁车站施工方案研究
（1 石家庄铁道大学土木工程学院，石家庄 050043；
2 石家庄铁道大学道路与铁道工程安全保障省部共建教育部重点实验室，石家庄 050043）
Adjacent Construction Option for a Running Tunnel Under an Existing Subway Station
(1 School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043; 2 Key Laboratory of Roads and Railway Engineering Safety Control of Ministry of Education, Shijiazhuang Tiedao University, Shijiazhuang 050043)
Abstract：
In light of the engineering characteristics of a new running tunnel approaching an existing subway station and in order to verify the feasibility of the design scheme to ensure safe and normal operation of the existing station, different construction methods with various scopes of stratum reinforcement were simulated by the FLAC3D Lagrange difference method, in which the rail settlement and structure stress of the existing station, as well as the law of surrounding rock deformation and the applied structural force of the new running tunnel, are analyzed. The analysis results show that the CRD method is recommended with the premise of grouting reinforcement in the interbed stratum, working face, and the left and right sides of the running tunnel within 3.0 m.
2013, Vol. 50 