Abstract：Research purposes：For construction of No 3 line’s shield tunnel under-passing the existed No 1 line’s tunnel of Shanghai metro, the mechanical behaviors of new tunnel construction were simulated with the three-dimensional fast Lagrangian analysis of continua (FLAC3D) method, the change and influencing scope of stratum stresses and the stresses and safety of structure were discussed, and the measures for and proposals to ensuring the construction safety of new tunnel and operation safety of existing tunnel were offered.
Research conclusions：The additional stresses distribution of existing tunnel was of laterally symmetrical status which took the central line of new tunnel as symmetry axis in construction process. The subsidence of the existing tunnel occurred and additional stresses of existing tunnel increased during construction of new tunnel. As the maximum internal force in the target face of the tunnel tubular lining appeared on the tubular lining on the arch web on both sides of new tunnel, the stratum between tunnels should be reinforced. When construction was finished, the main stress in the target face of the tubular lining of the shield tunnel became the biggest.
张 昆；郭菊彬. 新建与既有地铁隧道正交段施工力学行为研究[J]. 铁道工程学报, 2010, 27(2): 81-84.
ZHANG Kun, GUO Ju-bin. Research on the Mechanical Behaviors of New Tunnel Construction in the Area Orthogonal to Existing Metro Tunnel. 铁道工程学报, 2010, 27(2): 81-84.
Zhang Zhiqiang, He Chuan. Study on the Mechanical Behaviour of A Metro Tunnel Construction Adjacent to Existing Pile Foundations in Shenzhen. Chinese Journal of Geotechnical Engineering[J]. 2003(2) 204 - 207.
Huang Jun, Zhang Dingli. Numerical Simulation of Stratum Deformation above Overlapping Metro Tunnel[J]. Chinese Journal of Rock Mechanics and Engineering, 2005(12) : 178 - 184.
Yu Xinfeng, Wang Jian. Research Status and Thinking of the Interaction of Approaching Excavation in Subway Tunnel[J]. Journal of Beijing Institute of Civil Engineering and Architecture, 2008(3) : 33 - 37.
Cao Junfa. Application of Finite Element Numerical Simulation for Predicting Ground Surface’s Settlement Occurred In Driving Large-Cross-Section Metro Tunnel[J]. Railway Engineering, 2005(9) : 44 - 46.
Lv Qin. Analysis of Ground Deformation Affected by Soil Properties in the Construction of Metro Tunnels by Using Mining Method[J]. Modern Tunnelling Technology, 2005(2) : 32 - 34.
[ 7 ] GB 50021—2001,岩土工程勘察规范 [S].
GB 50021—2001, Code for Investigation of Geotechnical Engineering[S].
[ 8 ] GB 50307—1999,地下铁道 、轻轨交通岩土工程勘察规范[ S].
GB 50307—1999, Code on Geotechnical Investigations for Metro and Light Rail Transit[S].
[ 9 ] JGJ 79—2002,建筑地基处理技术规范 [S].
JGJ 79—2002, Technical Code for Ground Treatment of Buildings[S].
[ 10 ] GB 50007—2002,建筑地基基础设计规范 [S].
GB 50007—2002, Code for Design of Building Foundation[S].
2010, Vol. 27 
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