TIMBERING STRUCTURE OF CIRCULAR VERTICAL SHAFT, AND CONSTRUCTION METHOD FOR CIRCULAR VERTICAL SHAFT

摘要

PROBLEM TO BE SOLVED: To provide a timbering structure of a circular vertical shaft, which enables the circular vertical shaft to be simply and inexpensively constructed without being restricted by surrounding environments, and a construction method for the circular vertical shaft.SOLUTION: A timbering structure 2 of a circular vertical shaft includes: circular timbering 3 that is arranged inside an earth retaining wall 10; a plurality of jacks 4, 4,... that are interposed between the earth retaining wall 10 and the circular timbering 3; and jack control means 5 for actuating the plurality of jacks 4, 4,.... A construction method for the circular vertical shaft utilizes the timbering structure 2.SELECTED DRAWING: Figure 1