静力触探Ps值与土体物理力学参数的关联性

Correlation between ps values of CPT and physical and mechanical parameters of soil

本研究基于武汉市某地铁项目汉口—汉阳沿江段勘察成果,对土体静力触探ps值与通过室内土工试验、原位测试试验等多重手段综合得到的各物理力学参数间相关性进行了研究,并建立了相应的线性拟合方程式。结果表明,砂土的预测精度普遍高于粘性土,粘性土的粘聚力c、剪切波速vs、承载力特征值f_(ak)和压缩模量E_s的预测精度大于内摩擦角φ。本研究成果将为武汉地区岩土工程设计的参数取值提供重要的理论参考依据。

Based on the investigation results from the Hankou-Hanyang riverside section of a subway project in Wuhan,the correlation between the ps values from soil static cone penetration tests and the physical and mechanical parameters of soil obtained comprehensively by indoor geotechnical tests and in-situ tests is studied,and the linear fitting equations are established.The results show that the prediction accuracy of sandy soil is generally higher than that of cohesive soil.The prediction accuracy of cohesion c,shear wave velocity vs,bearing capacity characteristic value fak and compression modulus Es of cohesive soil is higher than that of internal friction angleφ.The study results would provide significant theoretical reference for the parameter selection of geotechnical engineering design in Wuhan area.