浅埋硬土层小截面短桩沉桩分析

在地层比较特殊的地段,往往由于经验及对地质情况认识不深而出现沉桩困难、桩头开裂等现象。文章针对浅埋硬土层采用小截面短桩情况,应用静力触探测试指标计算沉桩阻力,结合考虑桩身强度的方法进行沉桩分析,并统计了不同锤型入持力层不同深度的实际锤击数,为以后类似工程的选锤提供参考。

Analysis for small cross section of short piles to drive into the shallow hard stratum

In the area of special stratum, it is familiar phenomenon about the difficulty in the pile driving so that the pile head can be cracked , because builders have no experience or few geology knowledge. In this paper , under the circumstance of small cross section of short piles driving into the shallow hard stratum, the authors use SCPT( static cone penetration test) index to calculate driving resistance and considers the strength of the pile shaft to analyze. Furthermore, authors statistic actual impacting times in the local by various types of hammer when the pile drives into the different depth of the bearing stratum, it may offer the reference for the similar engineering to choose the hammer in the future.