A consideration of failures of slopes with countermeasures in Yamaguchi prefecture

From the viewpoints of soil engineering, geology, and slope disaster prevention engineering, field investigations were made of 109 failures of slopes with countermeasures such as sodding, retaining walls, and rock-fall prevention walls. Furthermore, physical properties and strength parameters of the surface soils were examined.The conclusions obtained are as follows: 1) In regard to the geology of Yamaguchi prefecture, the most slope failures occurred in the granite rock region. 2) Owing to the catchment topography, relatively small-scale failures occurred in slopes existing at the upper parts of the countermeasure works.

local severe rainfall

slope failure

countermeasure

geology

topography

surface soil

shear strength