Filling grouting method combined with tunnel lining quality defect 'blank' repairing

• Main Authors: GONG LUN, QIU WENGE, FAN YONGJIE, ZHANG ZHIXIN, WANG LICHUAN, WU CHAOGUANG, YANG JUNSHENG
• Format: Patent
• Language: Chinese; English
• Published: 15.10.2019
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

The invention discloses a filling grouting method combined with tunnel lining quality defect 'blank' repairing, and belongs to the field of tunnel repairing. The method sequentially comprises the following steps that the damage that the thickness of a tunnel vault lining smaller than the chipping standard thickness and a large hole exists in the back is subjected to blanking repairing, and a plurality of rows of slurry pipes are prepared, and a row of slurry outlet holes is formed in the longitudinal top face of each slurry pipe at equal intervals; grouting holes are subjected to non-closing sealing protection, and then slurry flowing pipes are arranged attached to an initial support or a waterproof layer around the periphery of the a blank cavity, and multiple grouting pipes are arrangedat the corners of the blank in the radial direction; a slurry discharge pipe is arranged at the highest point in the cavity, and concrete is sprayed into the cavity in a layered manner; after final setting, grouting is carrie