扭转荷载下群桩基础的承载机理及特性研究

Study on Bearing Mechanism and Characteristics of Pile Group Foundation under Torsional Load

在前人研究的基础上,结合某大桥的转体工程实际,采用理论分析和数值模拟技术相结合的手段,对群桩基础的受扭承载特性、荷载传递机理展开研究,探讨扭转荷载对于中心桩、边桩、角桩承载特性的影响,分析得到各桩基扭矩的变化规律、扭矩沿桩身传递规律、转角沿桩身传递规律、扭矩与转角的变化规律,并进一步验证了前人的研究成果。

Based on the previous studies, with the practice in the construction by swing method for a bridge, this paper, by means of theoretical analysis and numerical simulation, studied the pile group foundation＇s torsional bearing characteristics and the load transfer mechanism, discussed the effects of torsional load on the bearing characteristics of central pile, side pile and corner pile, and by analysis, found out the laws how each pile＇s torque changes, how the torque transfers along the pile body, how the twist transfers along the pile body, and how the torque and twist change; at last further verified the previous achievements.