新乌鞘岭隧道超前地质预报围岩泊松比分析

Analysis on Poisson's Ratio of Surrounding Rock in Advanced Geological Prediction of New Wushaoling Tunnel

在新乌鞘岭隧道施工过程中,受极高地应力与复杂应力状态的影响,部分段落极易发生软岩大变形。文章通过分析新乌鞘岭隧道TSP超前地质预报高地应力段的围岩泊松比,提高对F7断层超前预报的可靠性、精确性,准确了解并反映隧道开挖面前方的地质情况,为隧道开挖预防软岩大变形提供了可靠的保障,降低了地质灾害发生的风险,进而指导隧道施工顺利进行,降低隧道施工风险。

In the construction process of new Wushaoling Tunnel,some sections are prone to large deformation of soft rock due to the influence of extremely high crustal stress and complex stress state.By analyzing the Poisson's ratio of surrounding rock in high crustal stress section in new Wushaoling Tunnel's TSP advanced geological prediction,the reliability and accuracy of F7 fault advanced prediction are improved,and the geological situation in front of tunnel excavation face is accurately understood and reflected,providing a reliable guarantee for preventing large deformation of soft rock during tunnel excavation,reducing the risk of geological disasters,and then guiding the smooth progress of tunnel construction and reducing the risk of tunnel construction.