“桩—撑—锚”组合支护结构中参数对桩体内力的影响

Parameters of Pile-Bracing-Anchor Composite Support on Pile Internal Force

支护结构设计参数的改变对基坑的稳定及整体支护结构的内力和变形均会产生较大影响。以参数敏感性理论及有限元数值模拟为基础,对参数变动时"桩—撑—锚"组合支护结构中桩体内力的变化规律进行分析,借助有限元分析软件MIDAS/GTS对兰州地区某建筑深基坑工程支护结构的不同设计参数进行模拟,得出重要参数变动时"桩—撑—锚"组合支护结构中围护桩的弯矩和剪力的变化规律曲线,对比分析了不同参数的改变对支护结构中围护桩内力的影响,从而为兰州地区类似工程的应用提供一定的参考。

The variation of the design parameters the stability of the foundation pit and the internal of the supporting structure has a significant influence on force and deformation of the whole supporting structure. On the basis of the parameter sensitivity theory and finite element numerical simulation, the variation of the pile internal force of the pile bracing-anchor composite supporting structure was analyzed when the param eter altered. With the aid of the finite element analysis software MIDAS/GTS,the design parameter of the deep foundation pit support of a construction project in Lanzhou was simulated. The curve of the moment and shear force of the pile-bracing-anchor composite support was obtained, when important parameters changed,and the effects of the variation of parameters on the fender pile internal force were researched, which was of much value to the similar projects in Lanzhou.