大管桩与抛石体相互作用的模型方试验研究  

Model experimental research on interaction between large-diameter concrete pile and riprap

作　　者：冯春[1] 李世海[1] 吴豪伟[2] 许利凯 

机构地区：[1]中国科学院力学研究所环境力学重点实验室,北京100190 [2]北京科技大学土木与环境工程学院,北京100083 [3]北京科力安监测技术有限公司,北京100190

出　　处：《水运工程》2009年第6期14-21,共8页Port & Waterway Engineering

基　　金：国家自然科学基金重点项目(10632100);中国科学院重要方向性项目(KJCX2-YW-L01)

摘　　要：高桩码头施工中的抛石过程会对大管桩的受力产生较大的影响,这将给码头的正常使用带来隐患。模型实验用沙子模拟抛石体,用PVC管模拟大管桩,利用应变片电测技术,测量了不同工况下PVC管中的应变,并分析得出了作用在PVC管上载荷的分布规律。通过模型实验,给出了大管桩与抛石体相互作用的经验公式,并指出引起PVC管侧向弯曲的主要原因是沙子对PVC管存在侧向集中力,产生该集中力的原因是PVC管前后沙子高度差的存在。此外,通过验证实验和数值模拟,得出了与模型实验相同的结论,从而进一步证明了模型实验所得规律的正确性。Riprapping construction will have a great effect on large-diameter concrete pipe pile during the construction of high-pile wharf, and will engender hidden troubles to the normal operation of the wharf. During the model experiment, the riprap is simulated by sand and the large-diameter concrete pipe pile is simulated by PVC pile. With the strain gauge technology, the strain of the pile is measured and the distribution law of the load is discovered. By the model experiment, we give the empirical formula of the interaction between pile and riprap, and know that the concentrated load caused by the height difference of the sand fore-and-aft PVC pile leads to pile＇s lateral bend. Besides, by other tests and numerical simulation, the same conclusion is obtained, which proves further the correctness of the experimental rules.

关 键 词：高桩码头 大管桩 抛石体 量纲分析 模型实验 

分 类 号：TU473.12[建筑科学—结构工程]