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冬季施工、在北京地区历来被施工单位所重视,近年来,在冬季施工措施方面又有很大改进,工程质量明显提高。但就市政工程基础施工,回顾过去,有许多问题还未能彻底解决。在冻害方面就更加突出了,现举一些工程实例,均由基础冻胀作用引起的,使施工不得不进行翻工处理其教训是值得吸取的。经过翻工处理土的性质得到进一步证实土中的水经大气的变化,在负温时同样出现结冰而土结成了冻土,土在冻结后,它具
Construction in winter has always been emphasized by construction units in Beijing. In recent years, there has been a great improvement in winter construction measures and the quality of construction has been significantly improved. However, on the basis of municipal engineering construction and reviewing the past, many problems have not yet been solved completely. In terms of frost damage is even more prominent, and now give some examples of projects are caused by the basic frost heaving effect, so that the construction had to carry out the work of turning their lessons is worth learning. After the processing of the nature of the soil has been further confirmed that the water in the soil by the atmospheric changes in the negative temperature is also the same as the freezing of frozen soil, soil after freezing, it has