湿陷性黄土地区静压桩沉桩机理及试验研究  

Study of mechanism and test for jacked pile in collapsible loess area

作　　者：田志辉 王跃军 黄雪峰[2] 董建华[2] 

机构地区：[1]甘肃第三建设集团公司,甘肃兰州730030 [2]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《中国建材科技》2012年第2期47-52,共6页China Building Materials Science & Technology

摘　　要：基于圆孔扩张理论建立了黄土地区静压桩沉桩计算模型,并求解了弹塑性解析解。该模型能够真实反映湿陷性黄土地区静压桩沉桩机理,为静压桩的分析与设计提供了理论基础。结合实际工程进行了现场试验,测试了桩土摩阻力,桩及桩周土位移在静压时的分布变化规律。将理论计算结果和试验进行了对比,吻合比较好。通过分析及工程实践发现静压桩在湿陷性黄土地区有很好的应用前景,一些有益的结论可为这些地区类似工程作为参考。A jacked pile calculation model is established in the loess area based on the round hole expansion theory. The elastic-plastic analytical solutions are solved. This model can reflect the jacked pile mechanism in collapsible loess area. The theory basis is provided for the analysis and design of the jacked pile.Combined with the actual engineering field test is carryed out. The friction between pile and soil, displacement of pile and soil are obtained under jacking. The results of comparison theoretical calculation with test shows good agreement.Through the analysis and engineering practice of static piling found in collapsible soil area has a good application prospect, some useful conclusions can be for these areas as the reference for the similar projects.

关 键 词：湿陷性黄土 静压桩 圆孔扩张理论 沉桩机理 试验 

分 类 号：TU472.34[建筑科学—结构工程]