UNDERWATER HARDENING SANDBAG AND REPAIR METHOD OF WATERSIDE STRUCTURE OF USING THE SAME

PROBLEM TO BE SOLVED: To provide a repair method of a waterside structure excellent in workability, labor-saving performance and resource-saving performance, by filling and blocking up a cavity part in a short time, by forming a rigid bag body by naturally expanding by water on the inside of the cavity part, by simple work to be inserted into the cavity part formed on a back face of a through-port of a steel sheet pile of a steel sheet pile revetment by a diver.SOLUTION: An underwater hardening water sandbag having (a) an inner bag body formed of a water permeable sheet material, (b) a water absorbing body having a water absorbing resin stored on the inside of the inner bag body, (c) an outer bag body of including the inner bag body formed of an underwater hardening mat material and fixed by a lamination-fixation of at least one edge part and (d) a water conduction material inserted by penetrating through the outer bag body or the outer bag body and the inner bag body, in a cavity part formed on a back face of a through-port formed on a back face of a steel sheet pile by corrosion by flowing water and a wave in a waterside structure such as revetment structure and a river bank, is inserted into a through-hole in the water, and is constituted for filling the cavity part by forming a rigid bag body by hardening by gelling-swelling the underwater hardening water sandbag.SELECTED DRAWING: Figure 8 【課題】潜水士が鋼矢板護岸の鋼矢板の貫通口の背面にできた空洞部に挿入する簡単な作業で、空洞部の内部で自然に水で膨張し剛性袋体を形成し短時間で空洞部を充填し閉塞することが可能で、作業性や省力生や省資源性に優れた水際構造物の補修方法の提供。【解決手段】護岸構造物や河川堤防等の水際構造物に流水や波浪による浸食で鋼矢板の背面に形成された貫通口の背面にできた空洞部に、a.透水性シート材で形成された内袋体と、b.内袋体の内部に収容された吸水性樹脂を有する吸水体と、c.水中硬化マット材で形成され内袋体を包含し少なくとも1縁部の積層固定で固定された外袋体と、d.外袋体又は前記外袋体及び内袋体を貫通して挿設された通水材と、を備えた水中硬化水土嚢を水中で貫通孔に挿入し水中硬化水土嚢をゲル化膨潤させ硬化させて剛性袋体を形成し該空洞部を充填する構成。【選択図】図８