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| Numerical Simulation Calculation and Field Data Monitoring Analysis for Start Section of Shield Construction of Wuhan Metro |
| DING Lie － yun，LI Wei － ming，CHEN Xiao － yang |
| Huazhong University of Science and Technology，Wuhan，Hubei 430074，China |
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Abstract Research purposes: Shield construction is one of the major methods for metro construction． The big difference exists in features between the start section and the standard section in shield construction，such as the reinforcement area in the end section． It is necessary to investigate the features of the numerical simulation and the field monitoring data to know the special laws that fit to the start section．
Research conclusions: The finite difference model was established on the base of the soil properties of Jiangji Section of Line 2 of Wuhan metro． The shield construction process of the start section was simulated by 6 steps． The vertical displacements after excavating 30 m of the right track were analyzed by sampling the different cross － section while the analysis was made for the difference between the numerical simulation result and the field monitored data about the start process to know the common points of them for providing the reference to the numerical calculation，engineering analysis and engineering prediction of the start section of shield construction．
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Received: 15 January 2011
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2011, Vol. 28 
