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Shield beneath the surface of the Zhengzhou Railway Station , Beijing-Guangzhou line settlement is expected and Control Technology

Author: ZhaoQuanWei
Tutor: LiDongPing
School: Central South University
Course: Solid Mechanics
Keywords: Surface subsidence Numerical Simulation Shield Tunnel Finite element analysis method Monitoring and Measurement
CLC: U455.43
Type: Master's thesis
Year: 2011
Downloads: 78
Quote: 3
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Abstract


The shield law is a subway tunnel method , compared with the tunneling method , with the open-cut method of shield construction with construction speed , the advantages of small impact on the ground . Application of shield construction of subway tunnel , how to predict and control surface subsidence is an important issue in the shield construction . In this paper, Zhengzhou Metro Shield through the Zhengzhou Railway Station project , using finite element analysis software ANSYS numerical simulation of shield tunnel using stochastic medium theory to calculate the surface subsidence values ??, summarized field data , measured data and theoretical calculated values ??are compared to verify the longitudinal settlement and horizontal strata settlement and horizontal displacement law . The main work and results of the paper are as follows : 1 . Wear the special conditions of the railway station in Zhengzhou Metro Shield , determine the standard value of the the monitoring measurement methods and surface subsidence monitoring and alert value . 2 . Use of finite element numerical simulation and stochastic medium theory , is expected to shield passing through the surface subsidence caused by the train station , and were compared with the measured data are in good agreement between the two guidance of shield construction to ensure that the shield construction safety . Proposed shield to wear under the Zhengzhou Railway Station construction control methods , including the selection of shield machine cutterhead optimization , the shield tunneling on the tunneling direction control , muck improvement and synchronous grouting process shield of departure and arrival control , as well as the shield ends reinforcement . These control measures to control the shield surface caused by subsidence or uplift .

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CLC: > Transportation > Road transport > Tunnel project > Tunnel construction > Construction methods > Shield Law ( full- face excavation )
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