我段于一九六五年在局科研所及工务处的领导和支持下,在林口站内、建立了一个冻土观测站。通过一九六五年到一九六七年的观测(因文革停止),绘制了冻(融)深——时间曲线(如附图)。在消灭路基冻害工作中,借以确定冻害形成层的位置,经初步试验,方法简便,效果尚好。今将冻(融)深——时间曲线试用过程简述如下。一、冻害形成层 In 1965, I set up a station for the observation of frozen soil in Linkou Station under the leadership and support of the bureau and the Public Works Department. Through the observation from 1965 to 1967 (due to the cessation of the Cultural Revolution), a deep-time curve of freezing (melting) was drawn (as the attached figure). In the elimination of roadbed frost damage work, in order to determine the position of frost damage formation layer, the initial test, the method is simple, the effect is good. Now frozen (thawing) deep - time curve trial process is as follows. First, frost damage formation layer