关键词:  , 隧道坍方管棚注浆技术

Abstract:

 Due to the sudden change of the geological conditions, collapse occurs to the exit section of Nama tunnel, which is an integral part of QianGui railway capacityexpansion and reconstruction works. The situations, reasons and treatment construction plan of the collapse are presented. The construction practice shows that the collapse treatment plan is safe, reasonable and feasible and good results are achieved. The paper can provide reference for works construction under similar conditions in the future.