考虑土体参数条件随机场的矩形顶管施工地表沉降分析

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中图分类号：U452.1文献标识码：A

Ground Settlement Analysis of Rectangular Pipe Jacking Construction Considering Conditions Random Field of Soil Parameter

RUAN Chencheng 1，2 ， ZHOU Yuqing³，WANG Meng1，²， SHI Peixin 1，2 ， JIA Pengjiao 1，2 * （1.School of Rail Transportation，Soochow University，Suzhou，Jiangsu 215ooo，China；

2.Intelligent Urban Rail Engineering Research Center of Jiangsu Province，Suzhou，Jiangsu 215oo，China;

3. Zhongyifeng Construction Group Co.，Ltd.，Suzhou，Jiangsu 215OoO，China）

Abstract： Considering the insufficient utilization efficiency of geotechnical data when using the random field theory to describe the variability of soil parameter space，by combining the Kriging theory and the data-driven random field theory based on Bayesian compressive sensing and Karhunen-Loeve（ KL） series expansion method，a data-driven three-dimensional conditional random field generation method was proposed.This method was applied to characterize the variability of soil parameter space in a certain rectangular pipe-jacking project site in Suzhou City. A three-dimensional numerical model considering the variability of soil parameter space was established，and the setlement law caused by pipe-jacking construction was analyzed. The results were compared and verified with the on-site measured data， with the maximum error being less than 10% . The research results show that the generated data-driven conditional random field can fullyutilize the survey data in the actual engineering site，achieve the optimization simulation of the conditional random field of soil parameter space variability，complete the constraint of the survey data on the known sampling points，and reduce the uncertainty. Compared with deterministic calculation，uncertain calculation can fully represent the trend and fluctuation range of surface settlement caused by the rectangular pipe-jacking construction， providing a reference basis for the design and construction of complex geotechnical engineering.

Key words：rectangular pipe jacking；data-driven；conditional random field; spatial variability；ground settlement

顶管法因其空间利用率高、施工扰动小等优点广泛应用于地下交通建设中。（剩余10765字）