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前言冻土有两个定义:其一,凡是温度为0℃或低于0℃的岩、土称为冻土。其二,指温度为0℃或低于0℃,其中含有水而处于冻结状态的岩、土称为冻土。在冻土分布地区,冻胀、热融沉陷、冰椎、冰丘、热融滑塌等不良物理地质现象的发
Preface There are two definitions of permafrost: First, any rock whose temperature is 0 ° C or below is called frozen soil. Second, refers to the temperature is 0 ℃ or below 0 ℃, which contains water and frozen rock, soil is called frozen soil. In the distribution area of permafrost, frost heaving, thermal melting and subsidence, ice vertebra, ice hill, hot melt slump and other adverse physical and geological phenomena