太湖隧道湖相沉积软土工程特性研究  

Study on engineering properties of lacustrine soft soils along the Taihu tunnel

作　　者：吴建 周志芳[2] 王浩 陈波 王锦国[2] WU Jian;ZHOU Zhifang;WANG Hao;CHEN Bo;WANG Jinguo(Shanghai Investigation,Design&Research Institute Co.,Ltd.,Shanghai 200434,China;School of Earth Science and Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]上海勘测设计研究院有限公司,上海200434 [2]河海大学地球科学与工程学院,江苏南京210098

出　　处：《河海大学学报(自然科学版)》2025年第2期63-70,共8页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金项目(41572209);三峡上海院科标业项目(2024JC(831)-001)。

摘　　要：为研究太湖湖底沉积软土的工程特性和土体参数分布规律,收集了太湖隧道沿线湖底软土的大量试验数据,系统分析了软土物理力学参数的取值范围、变异性、概率分布模型以及空间分布规律,并探讨了各土层物理力学参数之间的相关性。结果表明:太湖湖底软土物理力学参数变异系数高,在空间分布上无明显函数变化规律;塑限和液限满足正态分布,密度和干密度近似正态分布,其他参数不符合正态分布;与强度参数最显著相关的物理力学参数包括天然含水率、天然孔隙比、干密度,呈指数或幂函数关系;对比压缩模量,压缩系数和天然含水率、天然孔隙比、干密度之间具有更好的相关性;各土层中黏土变形参数与强度参数间的相关系数最大,淤泥质土与粉质黏土次之,粉土最小。In order to explore the engineering properties and parameter distribution characteristics of lakebed sedimentary soft soils of Taihu,a large amount of experimental data of lakebed soft soils along the Taihu tunnel was collected.The value range,variability,probability distribution model,and spatial distribution pattern of physical and mechanical parameters were systematically analyzed.Then,the correlations between soil property indexes of various soil layers were explored.The results show that the physical and mechanical parameters of lakebed soft soils have high variation coefficients and no obvious functional variation pattern in spatial distribution.The plastic limit and liquid limit satisfy a normal distribution,the density and dry density approximately follow a normal distribution,while other parameters do not conform to a normal distribution.The most significant physical indexes related to the intensity parameter of soft soil are natural water content,natural void ratio and dry density,respectively,which have exponential or power functions in relation to those mechanical indexes.Compared to compression modulus,the coefficient of compression has a better correlation with natural water content,natural void ratio,and dry density.The correlation coefficients between intensity parameters and deformation parameters of clay are the largest,followed by mucky soils and silty clay,and silt has the smallest correlation coefficients.

关 键 词：软土 物理力学参数 抗剪强度 工程特性 太湖隧道 

分 类 号：U459.5[建筑科学—桥梁与隧道工程] U452.11[交通运输工程—道路与铁道工程]