METHOD FOR CONNECTING RETAINING PILE AND TENDON

To provide a method for connecting a retaining pile and a tendon, supporting a mountain retaining wall from a rear surface even when there is not enough site where a ground anchor can be installed on the rear surface of the mountain retaining wall.SOLUTION: In a method for connecting a retaining pile and a tendon, which connects a retaining pile provided on a rear surface of a retaining wall having an excavated space in front thereof, and a tendon connecting the retaining wall and the retaining pile, the retaining pile, an upper girder that can be lowered along the retaining pile, and a lower girder that is located below the upper girder and can be raised along the retaining pile are erected in the ground. An anchor hole is drilled diagonally downward from the retaining wall side toward the retaining pile. The tendon is inserted into the anchor hole together with an engagement jig fixed to a tip. As the upper girder lowers, the lower girder rises, and a girder material formed integrally with the upper girder and the lower girder of the girder material is arranged above and below the tendon fixed to the engagement jig. The tendon and the engagement jig are pulled back to engage the girder material and the retaining pile, thereby connecting the retaining pile and the tendon via the girder material.SELECTED DRAWING: Figure 1 【課題】山留め壁の後面に地盤アンカーの設置が可能な敷地が十分にない場合であっても、山留め壁を後面から支持する、控え杭と緊張材の連結方法を提供する。【解決手段】前面に掘削空間を設ける山留め壁の後面に設ける控え杭と、前記山留め壁と前記控え杭とを連結する緊張材と、を連結する、控え杭と緊張材の連結方法であって、前記控え杭と、前記控え杭に沿って下降可能な上部桁と、前記上部桁の下部に位置し、前記控え杭に沿って上昇可能な下部桁と、を地盤中に建て込み、前記山留め壁側から前記控え杭に向けて、斜め下方向にアンカー用孔を削孔し、前記アンカー用孔に、前記緊張材を先端に固定した係合治具とともに挿入し、前記上部桁を下降するとともに前記下部桁を上昇し、前記係合治具に固定した前記緊張材の上下に前記桁材の前記上部桁と前記下部桁とを一体として形成した桁材を配置し、前記緊張材と前記係合治具を引き戻して、前記桁材と前記控え杭を係合し、前記桁材を介して前記控え杭と前記緊張材を連結する。【選択図】図１