刚性组合桩复合地基沉降特性的试验研究

为了进一步探索刚性组合桩复合地基的沉降规律,设计了模型试验加载系统及实验箱,进行了十二组刚性组合桩复合地基试验研究,分别在长短桩共同加区、短桩与下卧层交接面、仅有长桩加固区、长桩与下卧层交接面埋设了沉降标,测得了长短桩组合的复合地基在不同深度处随桩长、桩径、桩距变化的沉降规律,分析了长短桩共同加固区、仅有长桩的加固区、长短桩与下卧层交接处、同一深度处不同影响因素沉降特征及同一影响因素不同深度处的沉降特征。试验结果表明:长桩桩长主控效果显著,长桩桩长、桩径、桩距对沉降影响在长短桩共同加回区表现更为突出,在仅有长桩加固区各影响因素对沉降影响差异不大。

Experimental study on settlement characteristics of rigid pile composite foundation

Based on the model test system has been designed, by twelve group test of rigid combined-pile composite foundation, this paper researched the settlement regularity of the long-short-pile composite foundation in different depth with the pile length, pile diameter, pile spacing changes, analyzed the settlement characteristics of the long-short-pile reinforcement area, only long piles of reinforced area, the border of long-short-pile and subjacent bed, different influencing factors at the same depth and the same factors effect of different depth.