基于双桥静力触探的饱和砂土液化判别方法刍议  

DISCUSSION ON DISCRIMINATION METHODS OF SATURATED SAND LIQUEFATION BASED ON DOUBLE BRIDGE CPT

作　　者：孙君[1] 韩琪 SUN Jun;HAN Qi(Changzhou City Planning and Design Institute,Changzhou Jiangsu 213022,China)

机构地区：[1]常州市规划设计院,常州213022

出　　处：《地质灾害与环境保护》2020年第1期87-92,共6页Journal of Geological Hazards and Environment Preservation

摘　　要：饱和砂土液化是地震引发地基变形失稳、建筑受损破坏的主因之一,合理判定液化可能性是勘察实践和理论研究的重大课题。国内规范要求砂土液化判别仍以标准贯入试验为主,静力触探等原位测试方法为辅,静力触探较其他原位测试手段,在操作便利性、数据采集连续性、测试成本和抗干扰能力等方面更具优势。针对国内规范常用静力触探砂土液化判别方法进行了分析研究,并结合勘察实例进行了计算和对比,探讨了静力触探判别液化方法的土层适用性,并提出有关改进建议。Saturated sand liquefation is the main cause of foundation deformation and instability or building damage during earthquakes.Discrimination of soil liquefaction is also a major issue for engineering survey and academic research.Standard penetration test is still the main method for liquefaction discrimination in domestic norms,supplemented by in-situ test methods such as static penetration test which has better operational convenience,more continuous data acquisition,lower testing cost and stronger anti-interference ability.Research on methods for saturated sand liquefation by double bridge CPT in the national code is provided,based on calculation and comparison of engineering example.Discussing on applicability of methods for various soil features and suggestions are given.

关 键 词：饱和砂土 液化判别 双桥静力触探 标准贯入 液化势 黏粒含量 

分 类 号：P642.1[天文地球—工程地质学] TU41[天文地球—地质矿产勘探]