膨胀土中桩侧阻力的静载试验研究  

Study on the Static Loading Test of Pile Lateral Friction in Expansive Soil

作　　者：曾庆国[1] 何杰[1] 张春顺[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：《湖南工业大学学报》2007年第1期97-100,共4页Journal of Hunan University of Technology

基　　金：国家自然科学基金资助项目（50378097）

摘　　要：通过室内模型试验，研究和分析了不同荷载以及不同时间条件下膨胀土地基中桩侧阻力的时程性。试验研究发现：相同时间、不同荷载作用下，桩身不同深度处侧阻力随荷载增加呈线性分布，靠近桩顶截面的侧阻力增加趋势更快，靠近桩端截面的侧阻力增加趋势相对较慢；在同级荷载不同时间条件下，桩身不同深度处的侧阻随时间增加变化不大。在试验研究的基础上，还对桩侧阻力的影响因素作了相关的理论分析和探讨。An indoor experiment was made to analyze lateral friction of pile in expansive soil under the condition of different loads and time. The fitting curves of the obtained results of the relationship between lateral friction and loads or times showed as follows： given the same time, the lateral friction along the pile increase almost linearly with the loads, the nearer the parts from the pile top, the faster the lateral friction development of the parts, while for the parts nearer the pile end, their lateral friction increase less fast compared with the parts nearer the pile top, given the same load, the lateral friction along the pile remain unchanged, or at least very little. It makes relative theoretic analysis and discussion of the influencing factors on pile lateral friction in view of the results of the experiment.

关 键 词：模型试验 膨胀土 桩侧阻力 线性拟和 

分 类 号：TU473.1[建筑科学—结构工程]