摘要
利用GDS双向振动三轴系统,对港珠澳大桥茂盛围段饱和粗砂动力特性进行了固结不排水动三轴液化实验研究。基于实验结果,分析了动剪应力比对其动孔压发展的影响,拟合出动孔压发展曲线模型;对其动应变进行了分析,得到了临界应力强度和极限应力强度的分界点;在不同围压下,饱和粗砂的动强度曲线可近似地归一,给出了其归一公式。
With the GDS dynamic triaxial system , consolidate-undrained trlaxial tests on the saturated sands taking from Hong Kong-Zhuhai-Macao Bridge＇ s Maoshengwei during liquefaction process are performed. Based on the results, Analyzes the influence on the development of the dynamic pore water pressure of the ration dynamic shear stress , fitting a curve of pressure pore＇ s development ; analyzed the dynamic strain, find out the boundary of the critical stress intensity and limit stress intensity ; under different confining pressure, dynamic strength curve of saturated coarse sand are fitted, the unitary formula is given.
出处
《科学技术与工程》
北大核心
2014年第11期248-251,共4页
Science Technology and Engineering
基金
国家自然科学基金重大培育项目(90815020)资助
关键词
动孔压
动剪应力比
动应变
动强度
dynamic pore water pressure ration dynamic shear stress dynamic straindynamic strength
