METHOD FOR REPAIRING SEASIDE PART ADJACENT TO CAISSON LEVEE STRUCTURE

To provide a method for repairing a seaside part adjacent to a caisson levee structure which enables a repair work for preventing a recession accident in a seaside part for a short period of time at low cost, and can suppress the recession accident caused by the occurrence of a cavity after the repair work.SOLUTION: In a state in which a buffer material 40 having a wave force attenuation action and a sediment outflow suppression action is installed in a joint part G formed between side faces of adjacent caissons 10 and the joint part G is closed, an upper layer of the seaside part positioned on a land side of the joint part is partially excavated to form an open-cut groove 23, a sand-preventive sheet 31 exposed to the open-cut groove 23 is repaired, and then the open-cut groove 23 is back-filled. The buffer material 40 positioned in the joint part G is left without being removed.SELECTED DRAWING: Figure 3 【課題】臨海部における陥没事故を抑止するための補修工事を短期間のうちに低コストで行え、補修工事後における空洞の発生に起因した陥没事故を抑制できる、ケーソン堤体構造物に隣接した臨海部の補修方法を提供する。【解決手段】波力の減衰作用と土砂の流出抑制作用を有する緩衝目地材４０を使用し、隣り合うケーソン１０の側面間に形成された目地部Ｇ内に緩衝目地材４０を設置して締め切った状態で目地部の陸側に位置する臨海部の上層を部分的に掘削して開削溝２３を形成し、開削溝２３内に露出した防砂シート３１を補修した後に開削溝２３を埋め戻す。目地部Ｇ内に位置決めした緩衝目地材４０は撤去せずに残置する。【選択図】図３