复杂古冲沟场地人工挖孔桩的承载性状

Study on the bearing capacity behavior of the excavated belled piles on the complicate old gully site

对某复杂的古冲沟场地上带扩大头的人工挖孔桩通过埋设土压力盒和钢筋应力计等原位测试手段,进行了试验研究。探讨了桩底平面上的应力分布和桩身受力主筋及桩顶箍筋的作用,为大直径人工挖孔桩的承载性状。

This article deals with a test carried out on the artificially excavated belled piles on a certain complicate old gully site by means of embedding earth pressure cells and reinforcement stress gauges. It also investigates the distinguishing characteristic of stress distribution on pile bottom plane and the effect of the main reinforcement of pile body and the hooped reinforcement on pile top, thus providing new practical information about the bearing capacity of excavated belled piles.