【作者】 荣琦； 蔡国军； 刘松玉； 刘东明； 段伟； 施烨辉； 武猛；

【Author】 RONG Qi;CAI Guojun;LIU Songyu;LIU Dongming;DUAN Wei;SHI Yehui;WU Meng;Institute of Geotechnical Engineering,Southeast University;Tunnel and Underground Engineering Research Center of Jiangsu Province;

【机构】 东南大学岩土工程研究所； 江苏省地质隧道与地下工程技术研究中心；

【摘要】 海洋工程建设的不断发展对其岩土工程勘察提出了更高要求,常规海洋岩土勘察技术难以满足如海洋风电开发、近岸港口疏浚、管道电缆勘测等项目经济、快速、便捷的要求,因而,新型的原位测试技术如自落式动力触探(FFP)技术受到关注。本文着重介绍了适合海相/湖相超软土的FFP测试技术理论与工程应用进展,首先回顾了自落式动力触探的发展历史,其次,总结并分析了基于FFP的不排水抗剪强度解译理论与土分类方法。针对现有FFP设备无法获取孔隙水压力参数,笔者设计出一种用于评价海底浅层土特性的自由落体式孔压动力触探装置,并提出FFP工程特性评价框架。分析表明:FFP技术在海洋岩土工程测试中具有推广应用前景。更多还原

【Abstract】 The continuous development of offshore engineering construction has put forward higher requirements for offshore geotechnical engineering investigation.Due to the fact that conventional marine in-situ test is difficult to meet the economic,fast and convenient requirements of projects such as offshore wind power development,port dredging and pipeline and cable surveys,free fall penetration test has attracted attention.The development of free fall penetration test is reviewed and a kind of free fall penetration technology is introduced for marine soft soil.The methods of undrained shear strength of soft soil and classification of sediment based on FFP are summarized.The authors designed a new free fall piezocone penetrometer for evaluating the characteristics of offshore geotechnical engineering and proposed the FFP engineering characteristic evaluation framework.The analysis shows that free fall penetration test has a broad application prospect in offshore geotechnical engineering testing.更多还原