中、粗、砾砂地层复合载体夯扩桩桩端承载力特征值的确定

DETERMINE OF THE PILE END BEARING CAPACITY EIGENVALUE OF THE COMPOUND CARRIER TAMPING EXTENDED PILE IN MIDDLE, COARSE AND GRAVEL SAND STRATUM

摘要: 夯扩桩技术在粉土、粉细砂等软土地区应用较广泛,实践中取得了非常好的经验,然而,该技术在中、粗、砾砂地层中应用较少,规程中也未提及,在具体工程的设计及施工过程中只能采用工程地质类比法粗略的估算。笔者收集了在中、粗、砾砂地层中打设夯扩桩的一些原始资料,通过对这些数据的对比统计分析,得出了一些有益结论。

Abstract: The tamping extended pile is wildly used in silt and fine sand area, and obvious experiences has been gained in practice. But this technique is seldom used in middle, coarse and gravel sand stratum, and not mentioned in rules. So in the procedure of design and construction of the specific engineering, engineering geological analogism is used to estimate roughly. According to the comparison and statistic analysis of the tamping extended pile data in the middle, coarse and gravel sand stratum, significant conclusion has been obtained in this paper.