愛媛県の地すべり地域における地下構造と地中水

概要

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Landslide phenomena are caused by many factors such as layer of soil, geological features, properties of bedrocks, properties of weathering products, water balance and others. The authors collected many data over more than 20 years, in order to analyze on.mechanism of the landslides called HASAITAI JISUBERI in Japanese occurred in Ehime prefecture.<BR>In this paper, the following conclusions were obtained from the examination on foundation and ground water in landslide area.<BR>1. 3-5 velocity layers are classified by the refraction seismic prospecting of drilling core samples, and these layers are well correlated to the grade of weathering. Overmore, all of these layers have the destruction zone.<BR>2. Section velocity of ground water calulated from permeability is slow than velocity of actural ground water. Because, ground water flow pass through creacks of weathering products. Still more, ground water is easy to flow in boundary layers or destruction zone.<BR>3. Landslides are occurred in boundary layers or destruction zone.
社団法人日本地すべり学会の論文