Study on surface deformation induced by shield tunneling based on random field theory

被引：0
|
作者：
Cheng H. [1 ]
Chen J. [1 ]
Li J. [1 ]
Hu Z. [1 ]
Li J. [1 ]
Huang J. [1 ]
机构：
[1] Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, Hubei
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2016年 / 35卷
关键词：
Probability analysis; Random field; Shield tunnel; Spatial variability; Surface deformation; Tunnelling engineering;
D O I：
10.13722/j.cnki.jrme.2016.0099
中图分类号：
学科分类号：
摘要：
Random field theory and numerical analysis method are combined to investigate the influence of the spatial variability of material properties on surface deformation caused by shield tunneling. Random fields of elasticity modulus are generated by Covariance Matrix Decomposition method to model the characteristics of spatial variability. Within Monte-Carlo framework, FLAC3D is used to analyze the influence of coefficient of variation and correlation distance of elasticity modulus on surface deformation. The results show the spatial variability of elasticity modulus has significant effects on both the values of greenfield settlement and the shapes of settlement trough. Depending on the relative size ratio between correlation distance and tunnel diameter, three surface deformation patterns are identified. The distribution of maximum surface settlement follows an approximate lognormal distribution. With coefficient of variation and correlation distance increasing, the more scattered the probability distribution of the maximum surface settlement, and the larger the probability of surface settlement exceeding the critical value. © 2016, Science Press. All right reserved.
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页码：4256 / 4264
页数：8
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