敞口预应力混凝土管桩的承载力

Bearing Capacity of Pre-stressed Concrete Pile with Open-end

预应力混凝土管桩采用敞口桩尖时,沉桩过程中部分桩端土进入桩管内形成“土塞”,从而减轻了挤土效应。本文分析了“土塞效应对单桩竖向极限承载力的影响,并就敞口桩尖与闭口桩尖的承载力特征值作了工程对比试验。

A part of soil placed in the end of pile gets into pre-stressed concrete pile with open-end in the process of pile-sinking. So a soil plug is formed in the pipe of pile, and the soil-squeezing is cut down. In this paper, it is discussed that the soil plug influences the bearing capacity of the pile with open-end, and a set of bearing test results is given to contrast open-end pile with close-end pile.