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季节性冻土,在我国北方广大地区都有,其冻结厚度和冻融的时间,随地理位置和每年气温的变化有所不同。黑龙江省各地季节性冻土层一般在2.0～3.0米。另外还有多年冻土是指长期(连续二年以上)冻结土层。在黑龙江省大、小兴安岭常碰到。如拉布达林、汇流河等电厂均有多年岛状冻土,厚度约几米到几十米不等。不论是季节性冻土还是多年冻土,它对于建筑地基基础产生不同程度冻害,尤其是主厂房、变电所主控楼与高压输电线路地基基础更为显著。迂到
Seasonal frozen soils are found in vast areas of northern China, and their freezing thickness and freeze-thaw time vary with geographical location and annual temperature. Seasonal frozen ground around Heilongjiang Province is generally 2.0 to 3.0 meters. In addition, permafrost refers to long-term (more than two consecutive years) frozen soil layers. It is often encountered in Daxing and Xiaoxing’an Mountains in Heilongjiang Province. For example, Labdalin, Conflux, and other power plants have many years of island-like permafrost, and their thickness ranges from a few meters to several tens of meters. Whether it is seasonal frozen ground or permafrost, it produces different degrees of freezing damage to the foundation of the building, especially the main building, substation main control building and high-voltage transmission line foundation foundation is more significant. Pick up