岩土工程学报2017，Vol.39Issue(z2)：1-4,4.DOI:10.11779/CJGE2017S2001
基于CPTU的土分类方法在港珠澳大桥中的应用
Application of CPTU-based soil classification methods in Hong Kong-Zhuhai-Macao Bridge
摘要
Abstract
The parameters obtained from the piezocone penetration tests (CPTU) have been widely used for soil profiling and geostratigraphy over the decades. In this study, large amount of CPTU soundings and parallel drilling borings and laboratory tests are performed to characterize the soils in the projects of Hong Kong-Zhuhai-Macao Bridge. The soil types determined from six CPTU-based soil classification charts are compared with those of the laboratory tests. It is shown that the soil classification charts using the non-normalized CPTU data are the worst performers with an accuracy of 80%. The normalized CPTU-based charts provide a more accurate evaluation of the soil type. However, the soil boundaries given by the normalized charts are not consistent with the soil types determined by the China's standard. Moreover, the accuracies of the normalized charts are over-estimated since a wide range of soil zones (e.g., zone 4 to 5) are used to characterize one single soil (e.g., silt). The CPTU-based soil classification chart modified for the China's practice is the best performer with an accuracy of 90%.关键词
孔压静力触探/土分类/孔隙水压力/土类指数/归一化锥尖阻力Key words
CPTU/soil classification/pore pressure/soil type index/normalized cone tip resistance分类
建筑与水利引用本文复制引用
刘松玉,邹海峰,蔡国军,祝刘文,杜宇..基于CPTU的土分类方法在港珠澳大桥中的应用[J].岩土工程学报,2017,39(z2):1-4,4.基金项目
国家重点研发计划课题(2016YFC0800201) （2016YFC0800201）
国家自然科学基金项目(41672294) （41672294）
