Abstract: Based on the site monitoring results of Zhenyang tunnel in the Qianjiang to Pengshui segment of the Yu-Xiang highway,the common rules of deformation of surrounding rock in super long tunnel of karsts areas are deeply discussed,and the internal development state of surrounding rocks is revealed.It is emphasized that the site monitoring of the stability is absolutely necessary for the construction.By the analysis of measuring convergence around,vault sink measurement,surface subsidence monitoring of the project equal measure from the displacement-time curve,the characteristics of curves of displacement with time in "natural type","jumping type",and "breaking type" are obtained.The monitoring data prove that the surrounding rock is steady,which can provide a reliable technological reference for the transfixion of the section.

Key words: monitoring and measurement, deformation, regression analysis, construction

摘要： 结合黔江-彭水段渝湘高速公路正阳隧道施工现场监测,对岩溶区特长隧道开挖岩体变形规律进行了探讨,揭示了隧道开挖后围岩变化趋势,强调进行现场稳定性监测的必要性。通过对周边收敛量测、拱顶下沉量测、地表沉降监测等量测项目所得的位移-时间曲线进行分析,总结出"正常型"、"跳跃型"、"突变型"位移-时间曲线的特征。监测分析数据表明,该隧道围岩处于稳定状态,为该区段顺利贯通提供可靠的技术保证。

关键词: 监控量测, 变形, 回归分析, 施工