【摘要】 <正>现有资料说明,我国西部高山高原区多年冻土的分布具有明显的垂直分带性,而其它各种地方性的地理-地质因素,对冻土的分布也有着重大的影响。我国西部高山高原地区多年冻土的分布情况相当复杂:多年冻土的分布下界是弯曲的;在一个很小的范围内,就可以遇到各种类型的冻土,其稳定性、冷生组构、含冰量和物理力学性质都有很大的差异;在不同的冻土区内,可以出现各种类型的融区,也可以出现种类繁多的冻土现象。有时,一沟之隔,冻土下界的高程可以相差几百米,並且,在几十米的范围内,冻土特征就有很大的变化,更多还原

【Abstract】 Under the effect of various natural factors, the permafrost distribution in the alpine-regions in west China is very complex. The past experience and lessons ought to be considered when the engineering-geological survey is to be undertaken in this regions. On the one hand, we must pay attention to its comprehensiveness, and on the other, we must take notice of stressing the main points of it, and make use of various methods comprehensively so as to get better results from least amount of work.The most important section of this paper is given to the discussion of methods, steps and principles of surveying in determining the limit of permafrost and ground ice regions.更多还原