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建立了粗、细粒土冻结模型,分析了扰动三层体内部的析冰原理,提出密闭水体的冻结-压力循环,该循环是涎流冰发育的机理.对饱水粗颗粒土与饱水细颗粒土的冻结模型比较表明,饱水粗粒土在密闭体系中的冻结;就其产生的水压力而言,实质上就是密闭水体的冻结,也就是水冻结成冰体积膨胀受限而产生力的问题.这种体积膨胀产生的力导致约束结构(如薄弱层)的整体性破坏.在公路边坡数值模拟分析的基础上,提出边坡薄弱层破坏导致渗水是形成坡积冰的主要原因之一,薄弱层破坏处是病害最严重的位置.根据病害形成原理和成因分析,并提出渗井与仰斜式排水管相结合的复合防治措施,工后效果良好.
The coarse and fine-grained soil freezing model was established, the principle of icebreaking inside the disturbed three-layer body was analyzed, and the freezing-pressure cycle of the closed water body was put forward, which is the mechanism of saliva ice development. The comparison of freezing model of fine granular soil shows that the freezing of saturated coarse grained soil in the closed system is essentially the freezing of the closed water body in terms of the water pressure, Force, the force resulting from this volumetric expansion leads to the integrity destruction of the constrained structure, such as the weak layer.On the basis of numerical simulation of the highway slope, it is proposed that the seepage of the weak layer of the slope leads to the formation of slope ice One of the reasons, the damage of weak layer is the most serious position of the disease.According to the principle of disease formation and the cause analysis, the combined prevention and cure measures of seepage well and down-inclined drainage pipe are put forward and the post-construction effect is good.