多元复合地基荷载传递的试验研究  

The Experimental Research on Load Transference of Piles in Multi-element Composite Foundation

作　　者：丁邦颖[1] 刘杰[1] 曾庆国[1] 

机构地区：[1]湖南工业大学岩土工程研究所,湖南株洲412008

出　　处：《中南公路工程》2007年第2期32-35,共4页Central South Highway Engineering

基　　金：湖南省教育厅重点课题(04A068)

摘　　要：根据刚柔性桩组合的多元复合地基的静载荷试验数据,分析了多元复合地基中刚性桩、柔性桩的桩顶应力及桩端应力随上部荷载的变化;刚性桩桩身荷载传递规律;不同褥垫层厚度对桩顶应力及桩身荷载传递的影响。试验结果表明:刚柔性桩桩顶和桩端应力随着上布荷载的增加而增大;刚性桩桩身最大轴力不在桩顶,桩身负摩阻力随着深度增加而减小;随着垫层厚度的增加,刚性桩桩身负摩阻力增大,最大轴力位置下移。Based on the loading test data of rigid-flexible piles in multi-element composite foundation,the changes of the stress on pile-top and pile-end of rigid and flexible piles with changes of the applied loads, and the load transfer rules of rigid piles is discussed. Moreover, the influence of variation of the cushion thickness on stress and load transfer rules of rigid-flexible piles is also analyzed. The test resuits show that the stress of rigid pile-top and pile-end increase with the increase of the applied loads;the maximum axial force is not at the pile-top for rigid pile and the negative pile skin resistance decreases with the increases of the depth ; the thicker the cushion, the greater the negative pile skin resistance it will be as well as the lower the position of the maximum axial force.

关 键 词：多元复合地基 荷载传递 褥垫层 

分 类 号：U416.1[交通运输工程—道路与铁道工程]