考虑桩土共同作用的钻孔灌注桩承载性状分析

以盖州北海渔民回迁楼工程为依托,选取其中的C14 号楼为研究对象,对其中两根试桩进行现场静载试验,并获得了Q-S 曲线、侧摩阻力随深度变化曲线、桩身轴力随深度变化曲线及桩土接触面相对位移随深度变化曲线. 然后根据现场勘查资料及有限元参数选取的经验值建立单桩模型,利用大型有限元分析软件ADINA 对单桩进行分析,并根据模拟数据及实测数据利用MATLAB 绘制了各项主要承载特性的对比曲线,一方面验证模型及参数的合理性,另一方面研究桩长对单桩各项主要承载特性的影响. 最后利用单桩验证过的模型及参数建立群桩模型,分析群桩的各项主要承载特性与桩长及桩间距的关系.

BEARING CHARACTERISTICS OF THE BORED PILE IN CONSIDERATION OF PILE-SOIL COMBINED ACTIONS

This study concerns with the C14 building, which is in Beihai, Gaizhou for fisherman's residence. Static load tests on two test piles were carried out and the Q-S curves,the lateral friction resistance vs. depth curve, the soil interface relative displacement vs. depth curve and the axial force vs. depth curve were obtained. According to the field survey data and parameters empirically selected for the finite element a single pile model. The large finite element analysis software ADINA is used to analyze the single pile, and the main bearing characteristic curves are plotted by MATLAB according to the simulation data and the measured data. The rationality of the model and the parameters are first validated, and the relationship between the pile length and the main bearing characteristics of the single pile is studied. Finally the relationship of the pile group's main load-bearing characteristics and the pile length and the pile spacing are analyzed by using the pile group model built based on the model and the parameters of the single pile.