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千葉県南房総市白浜地係において、 農業用道路建設中に特殊な地層が発見されました。 この特殊地層は、約200～300万年前の地震によって、 海底の砂層が液状化し、破壊した地層が不規則に堆積・隆起したもので、 露頭からその様子がうかがうことができます。 この露頭斜面は、地震による海底地すべりの詳細を把握する上で 大変重要な資料であるので、 学術面および地震防災意識の啓発面で活用が期待されています。 斜面の保護工では一般的に、露頭を被覆する工法が用いられますが、 今回、 土と石の強化保存剤TOTを用いて、 地盤の耐候性向上を図り、露出した地層面を保護を実施しました。