中文摘要：

监控量测在隧道新施工过程中起着重要的安全与指导作用。付家冲隧道左洞ZK26＋081断面和右洞YK25＋547断面在施工过程中出现塌方,是影响隧道施工进度最严重的两次。结合工程具体情况,从监控量测和地质超前预报两方面提出塌方预警,从岩层分布、雨水侵蚀作用和施工方法等方面分析塌方原因。针对以上两个典型塌方段,通过监控隧道的收敛位移和拱顶下沉量回归分析,反映隧道围岩的稳定状态,并与实际工况进行对比论证。结果表明,对于V级弱风化页岩隧道施工过程中,极易发生塌方事故,必须结合隧道监控量测技术,及时提出塌方预警,指导施工。

英文摘要：

The monitoring measurement plays an important role in safety and instruction of tunnel engineering. During Fujiachong Tunnel construction, there were collapse of the section ZK26 ＋081 of left tunnel and YK25 ＋ 547 of right tunnel. Those were the two most severe collapses in this tunnel construction. According to engineering geology and construction condition in-situ, the early warning of collapse was presented through monitoring measurement and geological prediction. From the aspects of distribution of layered rock, continuous rainstorm and engineering practice the reason for tunnel collapse were discussed. Due to those typical collapses, the displacement of convergence and vault crown settlement were measured and regression analysis was carried out to reflect the tunnel stability. Through contrasting the analysis with the real project, it could be found that the collapse was easily generated in V class of weak weathering shale rock. So it is important that the tunnel engineering construction should be combined with monitoring measurement to give the early warning of collapse and direct the construction.