预应力敞口管桩与闭口管桩的单桩沉降分析研究

Experimental Research on the Single Pile Settlement between Open-end and Close-end Prestressed Piles

通过在对8根预应力敞口管桩与闭口管桩的荷载．沉降试验，对比分析研究了敞口管桩与闭口管桩的沉降特性，并得出在桩顶荷载达到第3级荷载之前，两种桩的沉降几乎相同，随着继续加载，闭口管桩沉降与开口桩相比，沉降速度减缓，在达到管桩单桩极限承载力之前，闭口管桩沉降仅为敞口管桩的30％～50％左右．

The settlement behavior in open-end and close-end piles was discussed in this paper based on the force-settlement test with eight specimens. It was concluded that the settlement speed of close-end piles was slower than the openend piles and the settlement of close-end piles was only 30%-50% of settlement of open-end piles before the force arrived at the ultimate capacity.