HEAVING PREVENTION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a heaving prevention device capable of reducing cost required for heaving prevention measure while surely preventing the heaving of the bottom ground of a shaft. SOLUTION: In order to prevent the bottom part ground of a shaft 23 formed by digging a ground 20 from being heaved by a secular change resulting from a hydraulic pressure applied to the shaft, a hardener is filled into the portions 30 corresponding to the bottom ground to form the bottom ground so as to form a consolidated body 33, and anchor members 34 fixing a ground 22 located under the consolidated body 33 to the consolidated body 33 are fixed to the consolidated body 33.