作　　者： ; ;

机构地区： 长安大学公路学院特殊地区公路工程教育部重点实验室

出　　处： 《长安大学学报（自然科学版）》 2005年第2期30-32,共3页

摘　　要： 在研制的模型箱内,应用PVC管件模拟桩体,气囊加载,应变片和压力盒测试应力,在不同地基土状态下,对柔性基础下复合地基的桩顶应力、桩间土应力、桩端承载力进行了测试,研究了不同工况下桩土应力比的变化规律,并与刚性基础下复合地基桩土应力比进行了对比分析,结果表明桩土应力比随着桩底持力层强度的提高而增大,随着桩间土密实度的增大而减小,随着上部荷载的增加而逐渐趋于稳定。 In model box, PVC pipe was utilized to simulate pile, the air chamber was loaded, the stress was tested with strain gauge and pressure gauge, the stress of pile tip and pile bottom and the stress of the earth between piles were measured, the changing law of the pile-soil stress ratio of the composite ground under flexible foundation was studied, the results were compared with the pile-soil stress ratio of the composite ground under rigid foundation. The results indicate that the pile-soil stress ratio increase with the stress of pile bottom, decrease when the earth density increase, become stability when load aggrandize.

关 键 词： 道路工程 复合地基 柔性基础 模型试验 桩土应力比

领　　域： [交通运输工程]