夯实水泥土桩复合地基共同作用的试验研究

为研究夯实水泥土桩复合地基中桩体、垫层、地基土的共同作用及其工作性状，进行了不同桩长、不同配比单桩载荷试验，不同桩长的单桩及四桩复合地基载荷试验，不同面积置换率的9桩复合地基载荷试验。通过专门的测试元件对复合地基中的地基土反力分布、桩侧摩阻力等进行测定。根据试验结果分析了复合地基破坏模式，探讨了桩体、垫层、地基土的相互作用特性。对地基土反力分布特征、桩土荷载分担比、桩土应力比、单桩及复合地基中桩侧摩阻力分布特征等进行了研究。

Experimental study of piles-cushion-soil interaction of rammed soil-cement pile composite foundation

In order to study the behavior and working properties of piles-cushion-soil interaction of rammed soil-cement pile composite foundation, field loading tests of single pile and composite foundation with single pile, four piles, nine piles in different lengths and area displacement ratio have been carried out. Distribution of the soil contact pressure, the shaft resistance of pile have been measured by installing special measuring gauges. Based on the test results, the failure pattern, the behavior of piles-cushion-soil interaction were analyzed. Distribution of the soil contact pressure, the stress ratio and the load ratio of pile to soil, distribution of the shaft resistance in single pile and pile of composite foundation have been analyzed.