Taking the bridge pile foundation of Qingshui River as a prototype,the stability of piles in unfrozen soil and high-temperature permafrost is investigated by the indoor simulation test.

• 研究了未冻土和高温冻土两种条件下桩基承载力的特性；试验得到了高温冻土中的桩基承载力是未冻土中11.；6倍的结论；为青藏铁路工程的长期安全稳定评价与预防措施的制定提供了一定的参考依据。