浙北地区软土多种勘察成果相关性分析  

Correlation analysis of various exploration results of soft soil in northern area of Zhejiang province

作　　者：胡健[1] 王芳[1] 朱磊 徐学勇 HU Jian;WANG Fang;ZHU Lei;XU Xueyong(School of Architecture and Engineering,Huzhou Vocational Tech Academy,Huzhou 313000,China;Zhejiang Lifeng Building Reinforcement Engineering Co.,Ltd.,Huzhou 313000,China)

机构地区：[1]湖州职业技术学院建筑工程学院,湖州313000 [2]浙江力丰建筑加固工程有限公司,湖州313000

出　　处：《建筑结构》2023年第9期133-136,共4页Building Structure

基　　金：湖州市科技计划项目(2020YZ07);浙江省基础公益研究计划项目(LGF22D020002);浙江省2020年度高校访问工程师校企合作项目(FG2020167)。

摘　　要：在调查统计浙北地区软土的工程勘察资料的基础上,对软土静力触探参数与室内土工试验强度参数及地基承载力特征值进行相关性分析。建立浙北地区软土静力触探参数(锥尖阻力q_(c)、锥侧摩阻力f_(s))与室内土工试验强度参数(黏聚力c、内摩擦角φ)、变形参数(孔隙比e、压缩模量E_(s))之间的回归公式及静力触探参数q_(c)、f_(s)与平板载荷试验得到的地基承载力特征值fak之间的回归公式。结果表明,当q_(c)在0.4~0.7MPa、f_(s)在8~13kPa范围内,回归公式拟合度较好;相比于f_(s),利用q_(c)确定强度参数的回归公式可靠度更高;利用q_(c)、f_(s)确定变形参数的回归公式可靠度比较接近;静力触探参数反映地基承载力比反映强度参数、变形参数可靠度更高。研究结果可为区域性软土勘察、设计及施工提供工程参考。Based on the investigation and statistics of the engineering investigation data of the soft soil in northern area of Zhejiang province,the correlation analysis on static penetration parameters and the strength parameters of laboratory soil experiment and the characteristic values of foundation bearing capacity of the soft soil was carried out.The regression formula between static exploration parameters(cone tip resistance q_(c),cone side friction resistance f_(s)),strength parameters(cohesion c,internal friction angleφ)of laboratory soil experiment,deformation parameters(void ratio e,compressive modulus E_(s))of soft soil in northern area of Zhejiang province was established,and the regression formula between static exploration parameters qc,fs and characteristic values of foundation bearing capacity obtained from plate load tests was also established.The results show that when q_(c)is in the range of 0.4~0.7MPa and f_(s)is in the range of 8~13kPa,the regression formula has a good fit.Compared with f_(s),the regression formula of using q_(c)to determine strength parameters is more reliable,while the regression formula of using q_(c)and f_(s)to determine the deformation parameters is closer to the reliability.The static penetration parameters reflect the foundation bearing capacity more reliably than the strength and deformation parameters.The research results can provide engineering reference for regional soft soil survey,design and construction.

关 键 词：软土 静力触探参数 强度参数 变形参数 地基承载力 

分 类 号：TU447[建筑科学—岩土工程]