Taking the sudden collapse of support part in the early completed in K123+328-290 section of the right holes of expressway tunnel as example, the reasons for collapse are analyzed, and treatment programs are given. The project is proved integrated treatment approaches are feasible and effective, which has reference significance to similar engineering.%以某高速公路隧道右洞K123+328～290段已完成的初期支护部分突然发生坍塌为例,介绍工程所处地质情况,初步分析塌方原因,给出塌方处理方案.工程实践证明综合处理方法可行有效,对类似工程问题具有借鉴意义.
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