粉细砂层标准贯入与重型动力触探指标换算的探讨  

Correlations between SPT and Heavy Dynamic Penetration Testing in Silty Fine Sands

作　　者：刘旭[1] 张海东[1] 葛宝玉[1] 李洪鹏[1] 迟嘉元 

机构地区：[1]辽宁省建筑设计研究院岩土工程公司,沈阳110005

出　　处：《土工基础》2014年第6期126-128,共3页Soil Engineering and Foundation

摘　　要：在勘察生产实践中,当遇到粉细砂层时,勘察单位常采用标准贯入试验,而重型动力触探试验做的较少;也常遇到测试指标受到操作方法或外界因素等干扰,导致数据误差较大,需要对测试指标进行对比分析。根据为辽宁省地方标准《建筑地基基础技术规范》修订进行的一些试验资料以及搜集以往辽宁省粉细砂地层的工程勘察资料,对同一粉细砂层中标准贯入试验和重型动力触探试验的测试结果以及通过这两种测试指标所确定的地基承载力特征值进行对比分析,得出了粉细砂层中两种测试指标的换算关系,以方便生产实践,并提供一个可供两种测试指标对比分析的公式作参考之用。In a conventional geotechnical investigation, the standard penetration test （SPT） is often utilized when a silty fine sand layer is encountered and the heavy dynamic penetration test （HDPT） is rarely used in the practice. The HDPT is often in- fluenced by the operators experience and factor factors and leads to a large testing error of these tested data. The tested data are then need to be carefully evaluated before they are used for the design purposes. Based on the test data obtained for the upda ring of Liaoning provincial code： Technical Code for Building Foundations and Soils, both SPT and HDPT data in the silty fine sand layers are compared and analyzed. The hearing capacity values determined by both methods are also compared. The corre- lations between SPT and HDPT are established for the design purposes.

关 键 词：粉细砂 标准贯入试验 重型动力触探试验 

分 类 号：TU413[建筑科学—岩土工程]