关于青藏高原冻土钻孔打入桩施工初探

The simple discuss on the construction of drilled and driven pile of the frozen soil in Qingzang plateau

通过对青藏铁路清水河试验段桩基施工 ,分析了覆盖土的岩性及冻土特征 ,提出了几种适宜于冻土的桩基类型。通过钻孔取样 ,并参考设计规范中有关条文 ,确定了采用钻孔打入桩效果最佳。介绍了钻孔打入桩的施工情况 。

Through the pile foundation construction in Qingshui river test section of Qingzang railway the rock character and the characteristic of frozen soil of overburden soil are analyzed and some pile foundations adapting to frozen soil are proposed. Based on the drilled sampling and reference in design norms the conclusion of adopting drilled and driven pile is the best choice is acquired. The construction situations of this kind of pile are introduced and the summary of the drilled and driven pile for the past several years are made.