砂土场地国标与美标标准贯入试验能量分析及击数转换关系研究  

CHINESE AND ASTM STANDARD PENETRATION TESTS AT SAND SITE:PENETRATION ENERGY ANALYSIS AND CORRELATION OF BLOW COUNTS

作　　者：葛一荀 张洁[1] 祝刘文[2] 程小久 廖先斌[2] 汪华安 孔明[2] 郑文棠 王占华 GE Yixun;ZHANG Jie;ZHU Liuwen;CHENG Xiaojiu;LIAO Xianbin;WANG Huaan;KONG Ming;ZHENG Wentang;WANG Zhanhua(Department of Geotechnical Engineering and Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China;Fourth Harbor Engineering Investigation and Design Institute Co.,Ltd.,China Communications Construction Company,Guangzhou 510230,China;China Energy Engineering Group Guangdong Electric Power Design Institute Co.,Ltd.,Guangzhou 510663,China)

机构地区：[1]同济大学地下建筑与工程系,岩土及地下工程教育部重点实验室,上海200092 [2]中交第四航务工程勘察设计院有限公司,广州510230 [3]中国能源建设集团广东省电力设计研究院有限公司,广州510663

出　　处：《工程地质学报》2022年第2期507-519,共13页Journal of Engineering Geology

基　　金：国家自然科学基金项目(资助号:41672276,51538009);科技部重点创新团队计划(资助号:2016RA4059);中央高校基本科研业务费专项资金资助项目。

摘　　要：本文进行了美国《标准贯入测试和对开管取样的标准试验方法》(ASTM D1586-11)(美标)和中国《岩土工程勘察规范》(GB 50021-2001)(国标)标准贯入原位测试对比试验,获得了美标、国标标贯对比数据。标贯锤击能量分析表明,美标锤击能量较国标高。利用经验贝叶斯克里金插值法考虑锤击数的空间变异性,将不同空间位置的锤击数据转化到同一位置进行比较,分别建立了考虑与不考虑克里金插值误差的美标与国标标准贯入转换关系模型,发现考虑插值误差后转换模型的模型误差显著降低。对境外液化数据库的分析表明,当采用本文提出的标准贯入转换关系后,境外液化案例与我国《建筑抗震设计规范》(GB 50011-2010)中的液化判别方法符合程度更高。This paper examines the Standard Penetration Tests(SPTs)according to Standard Test Method for Standard Penetration Test(SPT)and Split-Barrel Sampling of Soils(ASTM D1586-11)and Chinese Code for Investigation of Geotechnical Engineering(GB 50021-2001).It conducts the SPT at a sand site in Guangdong province,China.It is found that tests conducted according to ASTM D1586-11 have higher penetration energy than those conducted according to GB 50021-2001.To consider the spatial variability of the blow counts,an empirical Bayesian Kriging method is used to interpolate the blow counts measured through tests conducted according to GB 50021-2001 at the locations where tests according to ASTM D1586-11 are conducted.The maximum likelihood method is used to calibrate the relationship between the blow counts measured from the two types of tests with and without consideration of the interpolation error.After the interpolation error is considered,the model uncertainty of the relationship between blow counts measured through the two types of tests is significantly reduced.Through the conversion relationship suggested in this paper,the liquefaction phenomena observed in a liquefaction database with case histories collected outside China's Mainland become more consistent with the liquefaction potential assessment model specified in the Chinese Code for Seismic Design of Buildings Code(GB 50011-2010).

关 键 词：标准贯入 转换关系 克里金插值 插值误差 液化判别 

分 类 号：TU43[建筑科学—岩土工程]