碎石桩加固液化砂土地基的数值模拟分析  

ANALYSIS ON NUMERICAL SIMULATION OF LIQUEFIABLE SAND SOIL REINFORCED BY GRAVEL PILE

作　　者：牛琪瑛[1] 刘建君[1] 张明[1] 刘少文[2] 

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 [2]山西省交通科学研究院,山西太原030006

出　　处：《工程力学》2011年第A01期90-93,共4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);山西省交通厅科技项目(10-1-06)

摘　　要：该文采用三维有限差分程序FLAC3D(Fast Lagrangian Analysis of Continua)对未加固和碎石桩加固的液化砂土地基进行数值模拟,对其建立模型以及进行地震响应分析,得到碎石桩加固液化地基土模型的抗液化效果。经数值分析,证实了碎石桩具有显著的排水效果。同时与振动台试验数据相比较,论证了数值模拟结果的可靠性。In the paper,the liquefiable sand soil non-improved and improved by gravel piles under earthquake action is numerically simulated by using the three-dimensional finite difference program ＇FLAC3D＇（Fast Lagrangian Analysis of Continua）,and a model to analyze seismic response is established in order to investigate the results of liquefiable sand soil reinforced by gravel piles.According to the analysis of the numerical simulation,the gravel piles confirmed have remarkable drainage effect.Compared with the result of shaking table tests,it is demonstrated that the test of Numerical simulation is reliable.

关 键 词：岩土工程 液化砂土加固 数值模拟分析 碎石桩 超孔隙水压力 孔压比 

分 类 号：TU473.1[建筑科学—结构工程]