Detection and Treatment Countermeasures of Voids Behind Tunnel Lining During Operation
The time available for detection and subsequent defect treatment during tunnel operation is limited,and how to accurately identify defects and rapidly address them is an urgent issue to be resolved.Based on a tunnel engineering project in Chongqing,this paper adopts different methods to conduct detailed detection of voids and proposes targeted treatment measures.Engineering practice shows that in the detection of voids behind tunnel lining,emphasis should be placed on identifying the effective thickness of the lining to provide a basis for subsequent defect treatment.This can be done simultaneously with methods such as the knocking method,ground-penetrating radar(GPR),and borehole opening method.In terms of treatment,grouting material has proven effective in the treatment of voids behind tunnel lining during operation.This study can provide a reference for similar tunnel defect detection and treatment in the future.
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