饱和砂砾土的孔压发展模式试验研究  

Experimental Study on Development of Dynamic Pore Water Pressure in Saturated Gravelly Soil

作　　者：杨哲 张婷[1] 王占彬[1] 何晓民[1] 肖志威 Yang Zhe;Zhang Ting;Wang Zhanbin;He Xiaomin;Xiao Zhiwei(Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resource,Yangtze River Scientific Research Institute,Wuhan 430010,Hubei,China)

机构地区：[1]长江科学院水利部岩土力学与工程重点实验室,湖北武汉430010

出　　处：《岩土工程技术》2020年第1期53-59,共7页Geotechnical Engineering Technique

摘　　要：利用GDS振动三轴系统,对饱和砂砾土进行不排水动三轴液化试验,研究了含砾量和振动频率对饱和砂砾土振动孔压发展模式的影响,结果表明:含砾量越高和振动频率越高,振动孔压增长越快。结合试验结果采用不同的孔压应力模型描述砂砾土的孔压发展特性,给出了相关试验参数;提出了包含砾量参数与频率参数的孔压应变模型,并计算出相关试验参数的参考值。The dynamic triaxial tests have been conducted to study the effect of gravel content and cyclic frequency on the development of dynamic pore water pressure in gravelly soil by using the GDS apparatus.It could be concluded that the pore pressure increases with the increasing gravel content or cyclic frequency.Several stress-based pore pressure models are applied to describing the pore water pressure development,and the adopted parameters are given to get a good performance.There is a strain-based pore pressure model revised with the parameters of gravel contents and cyclic frequencies to express it and the parameters have been given.

关 键 词：动三轴试验 孔压应力模型 孔压应变模型 含砾量 振动频率 

分 类 号：TU411[建筑科学—岩土工程]