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作为我国第一条高寒地铁,哈尔滨地铁的修建对我国冻土地区地铁施工有着重大意义。明挖深基坑工程容易受地理环境的影响,尤其是冻融现象。本文通过对哈尔滨市地铁一号线烟厂站基坑围护结构水平位移的分析,阐述了冻土地区深大基坑的施工方式以及基坑围护结构受冻土影响的变化规律,这对我国今后冻土施工具有一定的借鉴意义。研究显示,影响基坑安全的因素有:冻融现象、钢支撑架设、地面堆载、基坑开挖深度,其中冻融现象是影响季节性冻土地区深基坑安全性的重要因素。
As the first alpine metro in China, the construction of Harbin Subway is of great significance to the subway construction in the permafrost regions of our country. Ming dug deep foundation pit project easily affected by the geographical environment, especially the freeze-thaw phenomenon. Based on the analysis of the horizontal displacement of the retaining structure of foundation pit of the smoke plant station in Harbin Metro Line 1, the construction method of deep foundation pit in permafrost region and the influence of the influence of frozen soil on the retaining structure of foundation pit are expounded. China’s future construction of frozen soil has some reference. The research shows that the factors that affect the safety of foundation pit are: freezing and thawing phenomenon, steel support erection, ground loading and pit excavation depth. The freezing and thawing phenomenon is an important factor affecting the safety of deep foundation pit in seasonal frozen soil region.