In heavy snowy region, snow cornices on roofs are serious problem of the architectural planning and structural calculation of snow load. Drifting snow frequently occurs on roofs in dry snow regions. Consequently snow accumulation on roofs increases especially on the leeward side. The authors studied snow cornices as regards the growing process of a cornice on buildings, the development of a cornice concerning the snowdrift on roofs. We carried out field observation of snow cornices and measuring of the snow depth distribution on buildings with flat roof in Asahikawa, Hokkaido, Japan. The following results were obtained. (1) Snowdrifts nearby parapet on the leeward side have a great effect on growing process of a snow cornice. (2) When snowdrifts are over parapet height, snow cornices are formed. (3) Snow cornice elongating hangs down by self-weight, and then another snowdrift deposits it. (4) Snow cornice is grown by the heavy snowfall (10cm/day) with mean wind speed exceeded 3m/s.

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道路の凍上対策として断熱工法が使用されることがある。 しかし， 従来の断熱材は断熱性能が高いものの強度が弱く設置に多大な手間が掛かること， 価格が高いこと等の問題点があった。 筆者は各種材料の密度と熱伝導率の関係， 並びに密度と強度の関係に良い相関があることを見つけ， これらの関係から下層路盤に用いることの出来る断熱材の開発可能性に着目し， 新工法のアイデアを案出した。 間伐材や廃プラスチックを活用した断熱ブロックを用いることにより， 道路の凍上対策を安価に構築することが可能と考える。

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