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恒山特长隧道2011年2月27日在ZK88+907位置发生塌方,ZK88+854~+902段二衬出现严重的超、侵限变形,二衬侵入净空最大达25cm,仰拱出现开裂变形,衬砌整体移位且地表山坡拉张与剪切裂缝发育范围不断扩大,影响到隧道结构安全。本文主要对该隧道病害的特征、形成原因及综合处治方案进行了论述,经过监控量测表明,隧道已处于稳定状态,取得了良好的治理效果,为隧道病害治理提供了有效的参考依据。
Hengshan tunnel on February 27, 2011 ZK88 +907 collapse occurred place, ZK88 + 854 ~ +290 section of the second liner showed serious ultra-invasion deformation, the second liner invasion of the largest clearance up to 25cm, inverted arch appears cracking, lining The overall displacement and extension of the extensional and shear fractures of the earth’s surface slopes continue to expand, affecting the structural safety of the tunnel. This paper mainly discusses the characteristics of the tunnel disease, the causes and the comprehensive treatment plan. After monitoring and measuring, it shows that the tunnel has been in a stable state and good governance effect has been achieved, which provides an effective reference for tunnel disease control.