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MODERN TUNNELLING TECHNOLOGY 2014, Vol. 51 Issue (3) :152-160    DOI:
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Study of the Numerical Calculation of Ground Response Under Metro Traffic Loading in a Loess Area
(BGI Engineering Consultants Ltd., Beijing 100038)
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Abstract Based on the Xi'an Metro Line 2, metro traffic loading is simulated by establishing an analytical model of a subgrade train-track system and a material mechanical model of a loess soil mass under the effects of long-term cyclic loading is derived and introduced according to the results of a dynamic triaxial test. Reasonable calculating parameters for the studied object are set, especially a series of numerical calculating conditions, such as artificial nonlinear viscoelasticity boundary conditions, to establish the numerical analytical model considering the dynamic interaction between a tunnel and surrounding soil and to study the regularity of the ground vibration response under metro traffic loading in a loess area. In addition, the variation of the ground vibration response under different speeds and various loads is analyzed and compared with respect to one-way and two-way metro traffic modes.
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WANG Xin
Han-Xuan
ZHOU Hong-Lei
Keywords�� Loess stratum   Metro   Vibration response   Artificial boundary condition   Soil mechanical model     
Abstract�� Based on the Xi'an Metro Line 2, metro traffic loading is simulated by establishing an analytical model of a subgrade train-track system and a material mechanical model of a loess soil mass under the effects of long-term cyclic loading is derived and introduced according to the results of a dynamic triaxial test. Reasonable calculating parameters for the studied object are set, especially a series of numerical calculating conditions, such as artificial nonlinear viscoelasticity boundary conditions, to establish the numerical analytical model considering the dynamic interaction between a tunnel and surrounding soil and to study the regularity of the ground vibration response under metro traffic loading in a loess area. In addition, the variation of the ground vibration response under different speeds and various loads is analyzed and compared with respect to one-way and two-way metro traffic modes.
Keywords�� Loess stratum,   Metro,   Vibration response,   Artificial boundary condition,   Soil mechanical model     
published: 2013-11-13
Cite this article:   
WANG Xin, Han-Xuan, ZHOU Hong-Lei .Study of the Numerical Calculation of Ground Response Under Metro Traffic Loading in a Loess Area[J]  MODERN TUNNELLING TECHNOLOGY, 2014,V51(3): 152-160
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