黏性土旁压试验与标准贯入试验土体参数相关性分析  

Correlation Analysis of Parameters of Clayey Soils Derive from Pressuremeter Test and Standard Penetration Test

作　　者：肖先波[1] 

机构地区：[1]湖州职业技术学院建筑工程学院,浙江湖州313000

出　　处：《施工技术》2017年第17期131-135,共5页Construction Technology

基　　金：湖州市公益性应用研究项目(2016GY19)

摘　　要：旁压试验(PMT)和标准贯入试验(SPT)都具有测试深度大、适用范围广等优点。利用旁压试验可以获得土体变形模量和抗剪强度,利用标准贯入试验可以获得土体标准贯入击数,建立二者之间的区域性相关关系可以丰富试验数据,降低工作成本。以厦门轨道交通1号线勘察工作为背景,标准贯入试验和旁压试验数据为基础,建立了花岗岩残积粉质黏土、辉绿岩残积粉质黏土修正标准贯入击数与变形模量、不排水抗剪强度之间的关系式。结果表明,花岗岩残积粉质黏土的工程特性要优于辉绿岩残积粉质黏土。标准贯入击数与土体变形模量、不排水抗剪强度之间存在很高的相关性,可以建立区域性经验公式,以标准贯入击数获取土体变形模量和不排水抗剪强度。Pressuremeter test （PMT） and standard penetration test （SPT） have many advantages such as large test depth and wide range of application. PMT can be utilized to obtain the deformation modulus and undrained shear strength of clayey soils while SPT can be used to obtain blow count. The establishment of the regional relationships between the two parameters can enrich the experimental data, and reduce the cost of work. Based on test data obtained from SPTs and PMTs in the investigation of Xiamen Metro Line 1, relationships between modified blow count and deformation modulus, undrained shear strength both in granite residual silty clay and diabase residual silty clay were established. The results show that engineering characteristics of the granite residual silty clay are better than diabase residual silty clay. A high correlation between modified blow count and deformation modulus, undrained shear strength of clayey soils was confirmed, which can be used to obtain the deformation modulus and undrained shear strength by modified blow count.

关 键 词：旁压试验 标准贯入试验 贯人击数 变形模量 不排水抗剪强度 

分 类 号：TU411[建筑科学—岩土工程]