应力分散型预应力抗拔桩系列技术研究与应用

根据目前国内外预应力抗拔抗浮桩、部分粘结预应力抗拔抗浮桩的优缺点以及使用的局限性——长螺旋钻机对于桩径＞800 mm或桩长＞30 m的桩力不从心，研究了应力分散型预应力抗拔桩及钢筋钢绞线笼系列技术，用于一个直径1 m、桩长60 m的抗拔桩工程，采用旋挖成孔，可实现在工程桩上进行大吨位试桩，受力合理，节省资金和工期，实践证明该系列技术有很好的应用前景。

Research and Application of Pre-stressed Uplift Pile with Stress Dispersion

According to the advantages and disadvantages of pre-stressed anti-floating uplift and partially-bonded pre-stressed anti-floating uplift as well as the application limitation in the world, stress-dispersion pre-stressed uplift with steel and strand cage serial techniques were researched to be applied in an uplift project by rotary drilling. The large tonnage test pile was used on the engineering piles with reasonable stress, low cost and short construction period; the practice proves its good application prospect.