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| Influence of spatial variability of geotechnical mechanical parameters on land subsidence |
| GAO Yan1,2, WU Xiaodong1,2, TIAN Jiayi1,2
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| （1. School of Earth Sciences and Engineering, SunYat-sen University, Zhuhai 519082, Guangdong, China;2. Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai), Zhuhai 519082, Guangdong, China） |
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Abstract Based on random field theory, finite element numerical analysis and Monte-Carlo stochastic simulation method, the influence of spatial variability of geotechnical parameters on land subsidence was investigated. The spatial variability of the internal friction angle was focused as the representative, and the effects of the coefficient of variation, horizontal correlation distance and vertical correlation distance of the internal friction angle were systematically studied. It was found that the larger the coefficient of variation was, the higher the dispersion degree of land subsidence curve was; compared with the results of deterministic analysis, the ground subsidence of the stochastic analysis considering the spatial variability of geotechnical parameter was greater; the offset distance of settlement center was affected by horizontal and vertical correlation distance, and the former had greater influence; when cavern was large enough, the influence of cavern on land subsidence was stronger than that of spatial variability of geotechnical mechanical parameters.
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Received: 20 June 2022
Published: 20 March 2023
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