To provide a retaining wall using precast concrete members, which facilitates and assures connecting concreate units of a wall which are disposed on and extended from each other and also facilitates and assures sealing water through the wall. 互いに延長配置に形成される一単位コンクリート壁体の連結及び止水が、容易且つ確実になされるプレキャストコンクリート部材による擁壁の提供。 - 特許庁