人民长江2024，Vol.55Issue(7)：229-239,253,12.DOI:10.16232/j.cnki.1001-4179.2024.07.030
基于随机场理论的隧道开挖后地表及隧道变形分析
Analysis on surface and tunnel deformation after tunnel excavation based on random field theory
摘要
Abstract
Natural soil has inherent uncertainties due to the influence of multiple factors.In order to better reflect the distribu-tion of actual soil parameters,a combination of Cholesky decomposition and stochastic finite element model was utilized to analyze the surface and tunnel deformation based on random field theory,in which the spatial variability of cohesion and internal friction angle were taken into account.The results indicated that the fluctuation range of the surface settlement curves cluster expanded with the increasing of related distance of cohesion and internal friction angle,and the effect of vertical related distance on surface settlement deformation was more significant.Furthermore,the influence of the cohesion variation coefficient and internal friction angle on surface settlement deformation was stronger than the effect of related distance.In addition,the distribution of the tunnel deformation values scattered with the increasing of the coefficient of variation of cohesion and internal friction angle,in which the coefficient of variation of internal friction had much influences.Neglecting the spatial variability of cohesion and internal friction angle could result in underestimating the predicted surface settlement and tunnel deformation,making the design more risky.关键词
隧道开挖/地表沉降曲线簇/随机场/空间变异性/相关距离/随机有限元模型Key words
tunnel excavation/ground surface settlement curve/random field/spatial variability/correlation distance/sto-chastic finite element model分类
交通工程引用本文复制引用
王勤,阎龙,张海莹,刘利骄,柳艳杰..基于随机场理论的隧道开挖后地表及隧道变形分析[J].人民长江,2024,55(7):229-239,253,12.基金项目
国家自然科学基金项目(41071049) （41071049）
中国地震局工程力学研究所基本科研业务费专项资助项目(2021D13) （2021D13）
黑龙江省自然科学基金项目(LH2023D022) （LH2023D022）
