碎石排水桩抗地震液化的试验研究与理论分析  

EXPERIMENTAL STUDY AND THEORETICAL ANALYSIS ON DRAINAGE GRAVEL PILE RESISTANCE OF EARTHQUAKE LIQUEFACTION

作　　者：李立军[1] 牛琪瑛[1] 梁仁旺[1] 杨庆陶[1] 

机构地区：[1]太原理工大学建工学院土木系,山西太原030024

出　　处：《工程力学》2010年第A02期226-230,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：振冲碎石桩处理砂土液化地基,通过挤密土体以及依靠桩体的排水减压和桩体减震共同作用来减轻或消除砂土液化的影响,取得较好的效果。该文利用小型振动台模型试验,重点研究碎石桩加固后的排水减压作用和理论分析。试验表明采用碎石桩加固可液化砂土,由于其良好的透水性抗液化效果明显优于其它方案。Using the way of vibro-replacement gravel piles,it gains a better effect in dealing with a sand liquefaction foundation.The liquefaction is reduced or eliminated depending on the extrusion soil body,draining decompression and absorption seism of the pile body together.Through the test of a small-scale shaking table model,this paper focuses on the theoretical analysis and the action of the draining decompression of reinforced gravel piles.The experiments show that gravel piles can be used in a reinforcing liquefaction foundation.By well anti-permeability effect,the gravel pile is obviously better than other ways.

关 键 词：碎石桩 砂土液化 振动台试验 超静孔隙水压力 排水减压作用 

分 类 号：TU318[建筑科学—结构工程] TU471.5