The probability density evolution analysis of ground vibration induced by subway with stochastic field is considered

Journal of Lanzhou University of Technology ›› 2025, Vol. 51 ›› Issue (1): 116-122.

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The probability density evolution analysis of ground vibration induced by subway with stochastic field is considered

ZHENG Zhong-yuan¹, DU Mu-qing², LIU Xin-yuan³

1. School of Architecture and Engineering,Lianyungang Technical College, Lianyungang 222000, China;
2. College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China;
3. School of Civil Engineering, Central South University, Changsha 410075, China

Received:2022-08-17 Online:2025-02-28 Published:2025-03-03

Abstract

Abstract: Foundation soil is an important medium of vibration wave propagation in subway operation, and the spatial variability of soil properties has an important influence on vibration response. Previous environment vibration research often choose for uncertainty parameters of foundation soil, in this paper, the stochastic field theory is introduced into the dynamic analysis of soil property changes, and the stochastic parameter assignment is carried out on the cross section of foundation soil. Based on the probability density evolution method, the environmental vibration caused by subway train in shield tunnel is studied, and the upper and lower limits of surface vibration and probability density distribution information are obtained. The results show that: The stochastic characteristics of soil have a significant effect on the standard deviation of ground vibration displacement and acceleration. The closer the distance from subway center line is, the less the interference of soil stochastic field is, and the more concentrated the probability density distribution of vibration displacement and acceleration is. The soil stochastic field makes the surface vibration response present normal distribution characteristics. The maximum value of ground vibration response appears in the middle time of subway train.

Key words: probability density evolution method, stochastic field, foundation soil, shield tunnel, subway train

CLC Number:

ZHENG Zhong-yuan, DU Mu-qing, LIU Xin-yuan. The probability density evolution analysis of ground vibration induced by subway with stochastic field is considered[J]. Journal of Lanzhou University of Technology, 2025, 51(1): 116-122.

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The probability density evolution analysis of ground vibration induced by subway with stochastic field is considered

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