土体抗剪强度与锥尖阻力相关关系研究  

Correlations of Soil Shear Strength(S_(u))and Cone Tip Resistance(q_(c))

作　　者：田臣龙 徐凤琳 孙作本 刘康 张晋昇 Tian Chenlong;Xu Fenglin;Sun Zuoben;Liu Kang;Zhang Jinsheng(Jining City Investigalion and Geomatics Institute,Jining 272004,Shandong,China;Lunan Geologicai Engineering Exploration Institute of Shandong Province,Yanzhou 272100,Shandong,China)

机构地区：[1]济宁市勘测院,山东济宁272000 [2]山东省鲁南地质工程勘察院,山东兖州272100

出　　处：《科技通报》2023年第6期63-67,83,共6页Bulletin of Science and Technology

摘　　要：双桥静力触探试验是黄河下游地区工程中不可或缺的一种原位测试,为研究该区域土体抗剪强度与锥尖阻力相关关系,基于济宁地区14个工程共144组数据,通过黏土、粉质黏土和粉土的粘聚力及内摩擦角和锥尖阻力沿土层深度的分布规律及对应关系,计算分析得到3种土类在不同应力状态下的相关关系,填补研究区土体抗剪强度与双桥静力触探锥尖阻力之间的研究空白。本次研究经验公式可用于黄河下游地区工程勘察设计工作,特别适用于应用总应力法分析饱和黏土深基坑稳定验算。In order to study the correlation between soil shear strength(S_(u))and cone tip resistance(q_(c)),as an important in-situ testing method,cone penetration test(CPT)has become indispensable in the engineering of the lower Yellow River.Based on the one hundred and forty-four groups of CPT data from 14 projects in Jining,after obtaining the distributions and corresponding relationships of cohesive strength(c_(u)),and angle of internal friction(φ_(u)),and cone tip resistance(q_(c))along the soil depth of clay,silty clay and silt,mo,the correlations for S_(u)and q_(c)under different stress states of clay,silty clay and silt,mo was proposed.The correlations of the study fill in the gaps in the research area.The empirical formulas in this paper can be used for geological investigation and engineering design work,which is especially suitable for stability analysis of foundation pit in saturated clay area by using the total stress approach.

关 键 词：双桥静力触探 抗剪强度 锥尖阻力 相关关系 

分 类 号：TU43[建筑科学—岩土工程]