东营新北油田海底土类动力特性的试验研究

Experimental Study on Dynamic Parameters of Seafloor Soil in the Dongying Xinbei Oil Field

土的动剪切模量、阻尼比是土动力特性的主要指标,是研究重大工程场地设计地震动参数的基础性资料。本文结合东营新北油田项目工程场地地震安全性评价工作,采用北京市新技术研究所生产的DDS-70动三轴试验系统,对新北油田工程场地的淤泥质粘性土、粉质粘土、粉土和粉砂进行了动剪切模量和阻尼比的试验研究。同时将实验结果与国内其他研究成果进行了对比。本项工作积累的有关基础资料和工作方法可为该工程附近有关海洋建设工程的地震安全性评价工作提供借鉴和参考。

The dynamic shear modulus and damping ratio of soil are two principle parameters of soil dynamic characteristics.They are the foundational data in designing ground motion parameter for important project＇s site.Combined with the seismic safety evaluation work of Xinbei Oil Field Project,Using DDS-70 dynamic triaxial test system produced by the Institute of Beijing New Technology,we carried out dynamic modulus and damping ratio study on muddy clay,silty clay,silt and sand soil.The experimental result was compared to other relevant study result.The accumulated basic data and method of this study can provide reference for the seismic safety evaluation of the related marine construction projects close to the study area.