摘要
通过进行大型模型槽足尺模型试验,根据桩身变形和桩身弯矩的试验结果,分析了水平荷载作用下现浇混凝土大直径管桩(以下简称PCC桩)的水平承载特性和桩-土共同作用性状。采用大型通用有限元软件ABAQUS对PCC桩的水平承载特性进行了数值模拟,计算结果与试验结果符合得较好,并进一步探讨了PCC桩水平承载特性的主要影响因素。结果表明:表层土体的弹性模量对水平受力性状影响较大,表层土体的厚度对桩身水平位移也有较大影响,因此可以通过改良表层土体来控制桩身水平位移,以达到工程设计要求;土体强度参数对水平承载特性也有影响,尤其是内摩擦角和粘聚力较小时更为明显。
The behavior of cast-in-place concrete large diameter pipe pile （PCC pile） under lateral load and pile-soil interaction were analyzed according to the pile displacement and moment of a full-scale model test. The behavior of PCC pile under lateral load was also modeled numerically with ABAQUS, which was confirmed very well with the test result, and its main influences were also discussed. The result indicates： the behavior of the PCC pile under lateral load is influenced by the Young＇s modulus and thickness of the superficial soil obviously, and the pile displacement can be controlled by improving the superficial soil to satisfy the requirement of engineering designs; the behavior of PCC pile under lateral load is also influenced by the parameters of soil strength, especially when the internal friction angle and the cohesive strength are both relatively small.
出处
《防灾减灾工程学报》
CSCD
2009年第3期289-294,共6页
Journal of Disaster Prevention and Mitigation Engineering
基金
国家自然科学基金项目(50778063
50679017)
江苏省"333高层次人才培养工程"基金项目资助
