| 摘要 |
PROBLEM TO BE SOLVED: To obtain a road-face lining installation method which can reduce traffic hindrance, and can shorten a construction period when executing a propulsion-type open shield method which is obtained by combing a propulsion process for extruding a concrete box body by using a base-push jack installed in a starting pit with an open shield method.SOLUTION: A propulsion-type open shield method repeats a process for excavating and removing sediment on the front side with respect to the front surface or the upper opening of an open shield machine, a process for propelling the shield machine by elongating a propulsion jack with a concrete box body as a reaction force, and a propulsion process for extruding the concrete box body by using a base-push jack installed at a starting pit by arranging a new concrete box body between the base-push jack and the extruded concrete box body. In a road part traverse point α, road face linings are formed in lateral alignment by installing H-steel on a road face from above the ground as beam materials 31 with a flange 31a face set above to receive an upper load, and the open shield machine 1 is propelled below the load.SELECTED DRAWING: Figure 1 |
