摘要
鉴于地铁基坑工程存在土体参数不确定性导致难以精细化控制变形的问题,依托济南地铁闫千户站基坑工程,考虑土体参数空间变异性,将随机场理论与数值模拟有机耦合,研究基坑变形特性与变异系数对变形的影响规律。结果表明,土体参数变异性较小时,可将二维随机场模型简化为一维计算;地表沉降大小和围护结构的变形具有较强相关性,围护结构最大变形区域在0.5 H~0.9 H,平均值约在0.7 H;变异系数与地表沉降呈正相关,变异系数从0.1增加到0.4,地表沉降值增大了70%。
The uncertainty of soil parameters in subway foundation pit engineering makes it difficult to finely control deformation.Taking the foundation pit engineering of Yanqianhu Station of Jinan Subway as the study case,and considering the spatial variability of soil parameters,the influences of deformation characteristics and variation coefficient of foundation pit on deformation are studied by coupling random field theory with numerical simulation.The results show that,(a)if the variability of soil parameters is smaller,the two-dimensional random field model can be simplified to one-dimensional calculation;(b)there is a strong correlation between surface settlement and the deformation of enclosure structure,and the maximum deformation area of enclosure structure is 0.5 H~0.9 H with an average value of 0.7 H;and(c)the coefficient of variation is positively correlated with surface settlement,and the surface settlement is increased by 70%when the coefficient of variation is increased from 0.1 to 0.4.
作者
雷领
郑卫强
吴波
丘洪彬
LEI Ling;ZHENG Weiqiang;WU Bo;QIU Hongbin(CCCC Road and Bridge construction Co.,Ltd.,Beijing 100027,China;School of Civil and Architectural Engineering,East China University of Technology,Nanchang 330013,Jiangxi,China;College of Civil Engineering and Architecture,Guangxi University,Nanning 530004,Guangxi,China)
出处
《水力发电》
CAS
2023年第8期42-48,113,共8页
Water Power
基金
国家自然科学基金资助项目(52168055)
江西省自然科学基金项目(20212ACB204001)。
关键词
地铁
基坑工程
参数空间变异性
变形特性
随机场理论
subway
foundation pit engineering
parameter spatial variability
deformation characteristics
random field theory
