静せい止し土ど圧あつ係けい数すう

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.

• 擁よう壁へきの設せっ計けいでは、静せい止し土ど圧あつ係けい数すうを適てき切せつに見み積つもる必ひつ要ようがある。

  In retaining wall design, it is necessary to estimate the coefficient of earth pressure at rest appropriately.