【作者】 张华华；

【导师】 洪家宝；

【作者基本信息】 扬州大学 ， 结构工程， 2007， 硕士

【摘要】 随着港口、公路、铁路事业以及高层建筑的发展，水平荷载桩在桥梁、港口、码头、海洋平台等工程得到了广泛的应用，并在某些重要的工程中水平荷载成为设计时控制因素，人们越来越多利用抗弯性能好的直桩代替传统打斜桩的作法来承受水平向的荷载。目前，相对于桩的竖向承载力的研究，桩的水平承载力研究依然处于相对落后的状态，应工程建设的需要使得对桩在水平荷载作用下的工作性状的研究日趋迫切。桩在水平荷载作用下的工作性状是一个复杂的桩土相互作用过程，传统的计算方法都不能很好地描述水平荷载作用下桩土共同工作的机理，它们一般只适用于均质地基，而对于多层等非均质地基多采用加权平均的方法，这很容易掩盖桩-土相互作用的突变现象，产生较大的计算误差。为了研究桩在水平荷载作用下的工作性状和破坏机理，本文对沿江地区某船坞预应力高强混凝土管桩(PHC管桩)工程进行了水平承载力现场试验，分析了水平荷载作用下管桩与土共同作用的工作性状，研究了管桩在水平荷载作用下的水平位移、转角、剪力、弯矩分布以及土体的塑性变形，并提出了PHC管桩合理的水平承载力设计值。从而为桩的内力和变形分析提供了可靠依据，可以为今后同类地区水平荷载桩的设计与理论研究提供参考依据。本文利用有限元软件ADNIA对现场试验项目进行了模拟分析，并与m法计算、现场实测结果进行对比分析，得到的模拟结果与实际情况基本上吻合。并分析了桩侧土体对桩身的反力、桩身的变形、应力应变分布问题以及工程桩的极限承载力。并探讨了管桩直径、壁厚、桩侧土模量等参数对桩的工作性状的影响。更多还原

【Abstract】 With the development of port, highway, railway and high architecture, thelateral pile has been applied broadly in engineering of bridge, port, dock,offshore platform. It becomes the controlling factors of design in someimportant engineering.Being have high bending capacity, the vertical pile isused to stead of the sloping pile to bear lateral load.At present, the study on lateral bearing capacity of pile fells behindresearching on the vertical, so it is necessary to research into the behavior oflateral load pile, which is a complicated process of pile-soil interaction.Traditional calculating methods, which are suitable for homogeneousfoundations, can’t describe distinctly the mechanism of pile-soil interaction.The weighted average mean was used for the non-homogeneous foundations,but it is easy to conceal the sudden transform phenomena and causescalculating accuracy.To research the behavior and mechanism of lateral load pile, this paper,based on the field test of lateral prestressed high-strength concrete pipe pile(PHC pipe pile), analyses the behavior of pipe pile-soil interaction, the lateraldisplacement, corner, shearing, bending moment of PHC pipe pile underlateral loading and plastic deformation of soil, and proposes another rationalbearing capacity of PHC pipe pile. It provides reliable data for analyzinginternal forces and deformation of pile, designing and studying of lateral loadpile in similar area.Simulated results, which come from simulating the field test by finiteelement software ADNIA, is rational by analyzing with m method resulted,field measured results. This paper also analyses anti-force of pile from soil,deformation, stress, strain of pile and limit bearing capacity of pile, anddiscusses the influence of some parameter such as diameter of pipe piles, wallthickness, soil modulus.更多还原