对于部分使用长桩的建设项目工程区域的持力层上方存在较厚的坚硬土层和软弱夹层地质条件，研究开发薄壁钢管离心混凝土管桩。现场打桩试验证明薄壁钢管离心混凝土管桩的抗锤击能力比PHC桩优越。现场单桩静荷载试验、实验室短柱轴向压力试验和桩身承载力计算说明薄壁钢管离心混凝土管桩的轴向承载力满足一对一替代原有的同直径规格钢管混凝土桩的要求。
In order to make the long pile to penetrate the strong and weak soil layer and reach the bearing layer, centrifugal concrete filled steel tubular piles are developed for some important projects. Pile driven experiment shows that centrifugal concrete filled steel tubular piles fit the geological condition better than PHC pile. Single pile static axial load experiment, short column static axial load experiment and the bearing capacity computation results show that centrifugal concrete filled steel tubular pile can one by one replace the concrete filled steel tubular pile of the same diameter originally used in projects.
