在我国北部边疆大兴安岭修建的某公路工程中,不少地段遇到了涎流冰,给施工和养护带来了很大困难。经几年的施工实践,对涎流冰产生的原因、变化规律以及对公路的危害有了初步认识,经采取一些防治措施,取得了一定效果。现就有关问题作如下探讨。一、涎流冰的形成涎流冰多产生在高寒地区,对交通运输妨碍极大。高寒地区夏季短暂,冬季漫长,一般结冰期长达半年。每当进入冰冻期,由于地下水不冻结以及植物覆盖层下的层间水冻结期晚,因而在地下水及层间水露头的地 In the construction of a highway in the north of our country, Daxinganling, many areas encountered saliva ice, posing great difficulties in construction and maintenance. After several years of construction practice, the cause of saliva ice, the changing rules and the hazards of the highway have been initially recognized, and some preventive measures have been taken and achieved certain results. We are going to discuss the relevant issues as follows. First, the formation of saliva ice ice saliva flow produced in the alpine region, the great impediment to transport. The alpine region has a short summer summertime and a long winter, with a typical ice age of up to six months. Whenever into the freezing period, due to groundwater is not frozen and the inter-layer water under the plant freezing period late, so groundwater and water in the interlayer outcrop