孔压静力触探试验在菲律宾某填海项目中的应用  

The application of CPTU tests to a land reclamation project in Philippines

作　　者：杜宇[1,2] 闻博 DU Yu;WEN Bo(CCCC-FHDI Engineering Co.,Ltd.,Guangzhou 510220,Guangdong,China;Institute of Geotechnical Engineering,Southeast University,Nanjing 210096,Jiangsu,China)

机构地区：[1]中交第四航务工程勘察设计院有限公司,广东广州510220 [2]东南大学岩土工程研究所,江苏南京210096

出　　处：《地基处理》2023年第2期167-173,共7页Journal of Ground Improvement

摘　　要：孔压静力触探试验作为一种快速、准确的原位测试手段在国内海洋工程领域得到了广泛的应用。本文基于海床式静力触探设备在菲律宾某填海项目的成果,对比分析了ROBERTSON(1990)分类图、刘松玉等(2013)分类图和《水运工程静力触探技术规程》(JTS/T242—2020)分类图对于菲律宾填海项目的适用性,总结出第3种分类图的解译结果最优。其次对比分析了基于孔压静力触探试验的3种不同细粒土不排水抗剪强度解译方法在菲律宾填海项目中的适用性,总结出基于净锥尖阻力的解译方法结果最优。并基于该方法绘制了细粒土不排水抗剪强度剖面,值得在其它填海项目中进一步推广应用。Piezocone penetration test(CPTU) is a rapid and accurate in-situ testing method,and it has been widely adopted in domestic and oversea marine engineering project.The seabed CPTU system has been successfully adopted in a land reclamation project in Philippines.Three different CPTU-based soil classification charts proposed by ROBERTSON's(1990),LIU Song-yu et al(2013),and Technical Specification for Cone Penetration Testing in Port and Waterway Engineering(JTS/T 242—2020) were selected for performance evaluation.It can be summarized that the third classification chart leads to the closest soil classification to the adjacent borehole data.Secondly,the applicability of three different interpretation methods of undrained shear strength of fine-grained soil based on CPTU test in the reclamation project was compared and analyzed.It is concluded that the interpretation method based on the net cone tip resistance is the best.Based on this method,the undrained shear strength profile of fine-grained soil was drawn,which is worthy of further promotion and application in other reclamation projects.

关 键 词：孔压静力触探试验 海床式静力触探设备 土层分类 不排水抗剪强度 净锥尖阻力 有效锥尖阻力 不排水抗剪强度剖面 

分 类 号：TU41[建筑科学—岩土工程]