碎石桩加固不同密实度液化土的孔隙水压力变化规律探讨  

STUDY ON PORE WATER PRESSRE VARIATION OF DIFFERENT DENSITY LIQUEFIABLE SAND SOIL REINFORCED BY GRAVEL PILE

作　　者：牛琪瑛[1] 郭英[1] 吴永娟[1] 张明[1] 

机构地区：[1]太原理工大学建筑与土木工程学院,山西太原030024

出　　处：《工程力学》2010年第A01期159-163,共5页Engineering Mechanics

基　　金：国家自然科学基金项目(50578104);山西省自然科学基金项目(2006011046)

摘　　要：通过碎石桩加固液化模型土振动台试验,研究了一定埋深时密实度变化的模型地基土振动过程中孔隙水压力和孔压比的峰值、振动结束后消散程度,揭示了加固与未加固液化土随埋深变化的孔压比与密实度的变化规律,阐明碎石桩加固液化土主要以密实度和排水两因素为主的加固机理,研究结果对今后实际工程碎石桩加固复合地基液化土判断有一定指导意义。The author performs the shaking table test of liquefied soil improved by gravel pile,and then analyzes pore water pressure as well as its peak ratio during vibration and dissipation.It is demonstrated that the pore pressure ratio at different buried depths changes with density.The mechanism of liquefied soil improved by gravel pile is discussed,which is related to the density and drainage of sand soil.

关 键 词：岩土工程 探讨 液化砂土 碎石桩 振动台试验 孔压比 密实度 

分 类 号：TU473.1[建筑科学—结构工程]