REPAIR METHOD OF DRIVING LANE WITH SWOLLEN ROAD BED OF MOUNTAIN TUNNEL OF EXPRESSWAY, AND SUSPENSION PIER USED THEREWITH

摘要

PROBLEM TO BE SOLVED: To provide a repair method and means for expanding an inner space of a mountain tunnel where automobiles drive, the inner space having contracted due to swelling of a roadbed in the tunnel.;SOLUTION: Pavement 2c is shredded beforehand at a location to be repaired. Main girders 9 on right and left are engaged to two ground anchors 5 on right and left, the main girders extending on a suspension material 6 suspended from a ceiling part 4a of lining concrete 4, and the ground anchors having been installed after securing one vehicle lane at a central part of the lining concrete 4. Lateral vibration is prevented by engaging a bottom edge of a diagonal-direction suspension material 6b with a suspension material engaging part 9b of the main girder 9, the diagonal-direction suspension material having been engaged to a lower edge 5b of the ground anchor 5 of the lining concrete 4 at obliquely upward right and left directions. A cross-beam 10 is installed on a lower flange 10b of the main girder 9 spanned in a tunnel direction. A lining plate 24 is installed on the cross-beam 10 for making a driving lane 2 of a suspension pier 7. A single-lane ramp 8 is connected to front and rear edge parts. A distal end of the ramp 8 is connected to the existing driving lane 2 and an invert is provided at a lower part of the suspension pier 7, thus repairing the driving lane of the tunnel.;SELECTED DRAWING: Figure 7;COPYRIGHT: (C)2017,JPO&INPIT