noun
coefficient of earth pressure at rest
Technical term in geotechnical engineering; refers to the ratio of horizontal to vertical effective stress when a soil mass is not undergoing lateral deformation.
擁壁の設計では、静止土圧係数を適切に見積もる必要がある。
In retaining wall design, it is necessary to estimate the coefficient of earth pressure at rest appropriately.
Compound of 静止 (seishi, 'at rest') + 土圧 (doatsu, 'earth pressure') + 係数 (keisū, 'coefficient'). A direct technical translation from English 'coefficient of earth pressure at rest'.