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目前对土的冻胀性分类均以土的种类、含水量和地下水情况三方面作为分类指标。本文提出土的冰胀性应以土的种类和土的密实度指标来进行分类。土的密实性不仅综合反映了土的含水量和地下水迁移的影响,而且能以它的大小来按人为需要的含水量进行冻胀性控制。这样由包括有含水量影响并对其能进行控制的土的密实度指标来对土的冻胀性进行分类,就比较严格。本文还提出,在根据冻胀特征值大小进行渠道衬砌抗冻设计时,要立足于对衬砌不允许有任何冻胀变形的设计思想,不应该考虑渠道衬砌有允许冻胀残余变位值问题。
At present, the classification of soil frost heave is based on the soil types, water content and groundwater conditions as a classification index. This paper proposes that the icing capacity of soil should be classified according to the type of soil and the density index of soil. The compaction of soil not only comprehensively reflects the influence of soil moisture content and groundwater migration, but also controls its frost heave by its size according to the man-made moisture content. Therefore, the classification of soil frost heave by the compaction index of soil affected and controlled by the water content is more stringent. It is also suggested that the design of channel lining should be based on the design idea that the lining should not have any frost heave deformation when the channel lining antifreeze design is made according to the frost heave characteristic value.