易塌陷土地基桩基础负摩擦力的研究

Research on the Negative Friction Force of Pile Foundation in Apt Collapse Ground

为了尽可能准确地计算易塌陷土地基桩基础的负摩擦力,通过对易塌陷土地基桩基础负摩擦力成因的分析,计算出谦比希铜矿充填搅拌站桩基础负摩擦力和桩的极限承受力。与按国内计算湿陷性黄土地基桩极限承受力的方法所得的结果进行比较,桩的极限承受力提高了20%以上。工程费用明显节省。建成使用以来,基础沉降也完全符合设计要求。

In order to calculate the negative friction force on pile foundation in the apt - collapse ground as exactly as possible, through the analysis of the cause of the negative friction force formation on pile foundation in the apt - collapse ground, the ultimate bearing capacity and the negative friction force on the pile of the backfill plant in Chambishi Mine are calculated. Comparing to the re- sult of the domestic calculating method for the ultimate hearing capacity on the pile in collapsible loess ground, the ultimate bearing caPacity on the pile is higher more than 20%. The engineering cost is saved obviously. The settlement of the pile foundation also meets the design requirement completely after the pile foundation put into service.