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地质分析法作为超前预报的根基,对其研究程度直接影响隧道综合超前预报的准确性,尤其是地质环境条件复杂的隧道。为此,提出了基于断裂带山岭隧道的现代地质分析方法:即以山岭隧道所穿越的地质体为研究对象,运用系统性理论,以“体-面-线-点”(三维地质体;区域平面;隧道沿线、不良地质体与隧道的交线;洞内各桩号段)为预报分析为重点、以“点-线-面-体”为检查预报失误原因的辅助循环研究体系,获得断裂带山岭隧道穿越的地质预报剖面图和断面图。通过与实际开挖揭露的地质条件对比,分析影响预报精度的因素,进而总结、归纳为提高后续预报的准确性提供依据。引入在建的大坪山隧道为例进行了应用分析,取得了较好的预报效果。
Geological analysis as the basis of advanced forecasting, the degree of its research directly affects the accuracy of comprehensive forecasting of tunnels, especially the tunnels with complex geological and environmental conditions. For this reason, a modern geological analysis method based on fault tunnel with mountainous tunnel is put forward: taking the geological body traversed by mountain tunnel as the research object, using the systematic theory, taking the “body-surface-line-point” ; Regional plane; tunnel along the line, the intersection of the poor geological body and the tunnel; each pile segment in the cave) as the focus of the forecast analysis, with “point - line - surface - body” System, access to fault zone mountain tunnel through the geological prediction section and cross-section map. By comparing with the geological conditions exposed by actual excavation, the factors influencing the prediction accuracy are analyzed, and then the conclusion is summarized and summarized to provide the basis for improving the accuracy of the subsequent forecasting. The Daping Mountain Tunnel under construction is taken as an example to conduct an application analysis and a good forecasting result has been obtained.