比奥固结有限元模拟中相关参数的敏感性分析  

Sensitivity Analysis of Related Parameters in Biot's Consolidation Finite Element Simulation

作　　者：贾兴安[1] 

机构地区：[1]江苏省地质调查研究院,南京210018

出　　处：《宜春学院学报》2016年第3期45-48,共4页Journal of Yichun University

摘　　要：为了系统全面地研究比奥固结有限元数值模型中相关土体相关参数对模型计算所得地面沉降的影响程度,以江苏泰州某大厦基坑土层为例,建立了比奥固结三维耦合数学模型,运用参数敏感性分析中的单参数敏感性分析法,计算并分析了模型中涉及的土体参数对模型计算所得地面沉降影响程度。结果表明:土体的弹性模量、黏聚力和重度对地面沉降的影响最大,在模拟计算中应重点考虑,土体的内摩擦角影响相对较小,泊松比、水平渗透系数及垂向渗透系数影响最小。In order to study the influence degree of soil parameters in numerical simulation model of Biots consoli-dation finite element method to land subsidence calculated by model systematically and fully, the soft layer of acertain mansion foundation pit in Taizhou, Jiangsu province was taken as an example, and a three - dimensionalcoupling mathematic model was established to calculate and analyze the influence degree of soil parameters in thismodel to land subsidence calculated by model. Results show that elastic modulus, cohesion and the weight of soilshould be mainly considered in the simulation, since they have large influence on land subsidence. In addition, in-ternal friction angle also has smaller influence on ground fissure, and irrfluenee of poisson ratio, horizontal andvertical hydramie conductivity on ground fissure are smallest.

关 键 词：比奥固结 土体参数 地面沉降 局部敏感度法 

分 类 号：P641[天文地球—地质矿产勘探]