本文介绍了青藏高原多年冻土地区钢筋混凝土钻孔打入桩、钻孔插入桩、钻孔灌注桩的施工工艺、回冻过程、适用条件及工程评价,提出了多年冻土地区桩的水平、垂直荷载试验方法,利用试验中得出的实测位移、弯矩数据,采用差分并结合优选的方法,反算出了地基系数的分布及各种设计参数,供有关工程使用。 In this paper, the construction process, refreezing process, application conditions and engineering evaluation of reinforced concrete drilling piles, drilling insert piles and cast-in-place bored piles in the permafrost region of the Qinghai-Tibet Plateau are introduced. Vertical load test method, using the measured displacement and moment data obtained in the experiment, using the difference and combined with the preferred method, the distribution of the foundation coefficient and various design parameters are inversely calculated for the relevant project.