(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)

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 qc、锥侧摩阻力 fs)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 Es)之间的回归公式及静力触探参数 qc、 fs 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 qc 在 0. 4 ~ 0. 7MPa、 fs 在 8 ~ 13kPa 范围内,回归公式拟合度较好;相比于 fs,利用 qc 确定强度参数的回归公式可靠度更高;利用 qc、 fs 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.

关键词: 软土; 静力触探参数; 强度参数; 变形参数; 地基承载力

中图分类号:TU447 文献标志码:A 文章编号:1002-848X(2023)09-0133-04

DOI:10. 19701 / j. jzjg. LS220170

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

HU Jian1, WANG Fang1, ZHU Lei2, XU Xueyong1

(1 School of Architecture and Engineering, Huzhou Vocational Tech Academy, Huzhou 313000, China;2 Zhejiang Lifeng Building Reinforcement Engineering Co. , Ltd. , Huzhou 313000, China)

Abstract: Based on the investigation and statistics of the engineering investigation data of the soft soil in northern area ofZhejiang province, the correlation analysis on static penetration parameters and the strength parameters of laboratory soilexperiment and the characteristic values of foundation bearing capacity of the soft soil was carried out. The regressionformula between static exploration parameters (cone tip resistance qc, cone side friction resistance fs),strength parameters(cohesion c, internal friction angle φ) of laboratory soil experiment, deformation parameters ( void ratio e, compressivemodulus Es) of soft soil in northern area of Zhejiang province was established, and the regression formula between staticexploration parameters qc, fsand characteristic values of foundation bearing capacity obtained from plate load tests was alsoestablished. The results show that when qcis in the range of 0. 4 ~ 0. 7MPa and fsis in the range of 8 ~ 13kPa, theregression formula has a good fit. Compared with fs, the regression formula of using qcto determine strength parameters ismore reliable, while the regression formula of using qcand fsto determine the deformation parameters is closer to thereliability. The static penetration parameters reflect the foundation bearing capacity more reliably than the strength anddeformation parameters. The research results can provide engineering reference for regional soft soil survey, design andconstruction.

Keywords:soft soil; static penetration parameter; strength parameter; deformation parameter; foundation bearing capacity

∗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).

第一作者:胡健,硕士,讲师,主要从事边坡工程、软基处理等方向的研究,Email:493268163@ qq. com.

[引用本文] 胡健,王芳,朱磊,等. 浙北地区软土多种勘察成果相关性分析[ J]. 建筑结构,2023,53(9):133-136.HU Jian,WANG Fang,ZHU Lei,et al. Correlation analysis of various exploration results of soft soil in northern area ofZhejiang province[J]. Building Structure,2023,53(9):133-136.