noun
coefficient of passive earth pressure
Technical term used in geotechnical and civil engineering. Refers to the ratio of horizontal to vertical effective stress when a retaining wall moves toward the soil, mobilizing passive resistance.
受働土圧係数は、擁壁の設計において重要なパラメータです。
The coefficient of passive earth pressure is an important parameter in retaining wall design.
Compound of 受働 (じゅどう, 'passive') + 土圧 (どあつ, 'earth pressure') + 係数 (けいすう, 'coefficient'). The term is a direct technical translation of the English 'coefficient of passive earth pressure'.