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The Surrounding Rock Monitoring and Finite Element Simulation of Subway Tunnel

Author: HanDeYuan
Tutor: ZhangBin
School: Liaoning Technical University
Course: Bridge and Tunnel Engineering
Keywords: Shield tunnel FEM simulation ANSYS adjacent building internal force
CLC: U455.43
Type: Master's thesis
Year: 2011
Downloads: 29
Quote: 0
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Abstract


As China’s urban population continues to expand, becoming more and more large and medium cities subway to ease traffic pressure on the choice. However, due to more intensive urban buildings, subway will inevitably surrounding soil and adjacent buildings have an impact, even with more advanced shield excavation. Therefore, in this case, how the impact on adjacent buildings to a minimum, a subway construction process can not be ignored in the emergence of a new issues and new trends in view of this, to shield the adjacent subway excavation Pile of Buildings has done some research in order to be able to provide the engineering design of future reference and recommendations.Firstly, the construction for the shield to start the mechanism of surface subsidence caused by exposition to continued construction of the Shenzhen Metro Line Rd Xixiang Station to the new construction segment interval shield the background of the shield construction, the excavation of shield mode choices, and the factors that cause land subsidence. In previous studies in this respect is reviewed and summarized, based on the measured data according to the site, the use of numerical simulation software ANSYS, in considering the nonlinear soil, grouting pressure, the top shield tail into force of the gap and the main factors Under a three-dimensional finite element model, through the "life and death" and turn the setting unit to achieve a shield excavation simulation of dynamic conditions, obtained by analyzing the vertical and horizontal soil excavation deformation of the two sections, the results display very close to measured values; confirmed in this simulation the parameters more in line with the selected project examples. In the tunnel excavation based on the model to study close to the object of a residential building, the building and soil as an organic whole, in accordance with the building-soil-Tunnel work together to build inter-related three-dimensional finite element model analysis calculated the shield when the subway tunnel through the adjacent buildings, its members based on settlement and internal forces of the upper state, the stability and safety of the building to make an assessment.

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