摘要
通过动三轴试验,对饱和砂卵石土在循环荷载下的液化特性进行了系统研究。在饱和砂卵石土的振动时程曲线分析基础上,得到饱和砂卵石土的动应力幅值随振动时间推移有衰减且衰减速率逐渐增大的规律特性;依据孔压演化理论,结合试验结果,对饱和砂卵石土的液化规律进行了系统分析,归纳出砂卵石土发生液化时含水量限制条件,与液化状态中的土样动应变状态的规律。此结论可为基础工程等土工构筑物抗液化措施提供参考。
Through dynamic triaxial test,liquefaction properties of saturated sandy pebble soil under cyclic loading were systematically studied.Based on the analysis of vibration time history curve of the saturated sandy pebble soil,the law that dynamic stress amplitude of the saturated sandy pebble soil attenuates gradually with vibration time＇s development is obtained.According to the evolutionary theory of pore pressure and the test results,the limiting condition of water content of sandy pebble soil is induced when it initially liquefies,and the law of dynamic strain situation of soil sample is also obtained.This conclusion can offer reference for anti-liquefaction of foundation engineering and other earth structures.
出处
《建筑科学》
北大核心
2009年第3期35-38,共4页
Building Science
关键词
饱和砂卵石土
液化
孔隙水压力
动三轴试验
saturated sandy pebble soil
liquefaction
pore water pressure
dynamic triaxial test
