土体不同剪切试验强度指标差异性规律研究  

Research on the Difference Law of Strength Indexes of Different Shear Tests of Soil

作　　者：洪磊 章晓余 HONG Lei;ZHANG Xiaoyu(Anhui Transport Consulting&Design Institute Co.,Ltd.,Hefei 230088;China Coal Technology&Engineering Group Nanjing Design&Research Institute Co.,Ltd.,Nanjing 210031)

机构地区：[1]安徽省交通规划设计研究总院股份有限公司,合肥230088 [2]中煤科工集团南京设计研究院有限公司,南京210031

出　　处：《四川地质学报》2025年第1期101-105,共5页Acta Geologica Sichuan

基　　金：安徽省交通规划设计研究院技术研发项目(K220191HF)资助。

摘　　要：该文依托南京市地铁5号线工程勘察项目,以某路段场地地层为研究对象,在钻探分层、取样进行室内土工实验基础上,对比分析几种土体剪切实验数据,结合土力学分析,确立土体不同剪切实验强度间变化趋势。证实随土体剪切破坏排水固结程度增加,抗剪强度粘聚力C值减小,内摩擦角φ值增大。研究表明,自然土体是三相物质集合体,饱和度无法达到100%,土体内部孔隙气相物质存在是土体表现出以上特性的原因。Based on the investigation project of Nanjing Metro Line 5,this paper takes the site strata of a section as the research object,and compares and analyzes several soil shear test data on the basis of drilling stratification and sampling.Combined the analysis of soil mechanics,the variation trend of soil strength in different shear tests is established.The results show that with the increase of soil shear failure and drainage consolidation degree,the cohesion C value of shear strength decreases and the internal friction Angleφvalue increases.The research shows that the natural soil is a three-phase material aggregate,the saturation can not reach 100%,and the existence of gas phase material in the pores of the soil is the reason for the above characteristics of the soil.

关 键 词：剪切实验强度指标 勘察 排水固结程度 内聚力 内摩擦角 

分 类 号：P642.23[天文地球—工程地质学]