林白铁路最大冻土深度取值的研究

Research on Maximum Depth Computing of Frozen Soil along Linbai Railway

通过穿越大兴安岭的林白铁路的实地调查研究和设计实践,发现设计时采用最大冻土深度取值不当,容易造成一些问题,冻深取值大了造成工程的浪费、取值小了容易出现冻害隐患,经过研究得到了较好的解决方案,即采用5个修正系数,对不同的工程部位采用不同的设计冻深,其范围在1.2～3.2 m之间,取得了较好效果。

Through the field investigation and design practice on Linbai Railway across Great Khingan, it is found that improper computing of maximum frozen soil depth in design would cause some troubles easily. The bigger value would lead to project cost; or smaller one risk freezing injury. The preferable resolution is obtained through research that five correction factors are adopted and different values of the design depth within 1.2 - 3.2 m are used against different engineering positions, resulting in good effect.