宜万铁路复杂岩溶隧道施工地质预报特色

摘要

研究目的:宜万铁路地质异常复杂,被誉为修建铁路的"禁区",隧道工程存在巨大地质风险.重大隧道工程主体深埋于山体内腹,而目前勘察的技术手段只能探及浅都,难以涉及深部,完全查清隧道深部复杂的地质问题,的确很难(国内外皆如此),隧道建设始终存在"地面勘察难以探明深部,而隧道深部施工安全、工程处理又要求尽量探明"这一对矛盾.为解决这对矛盾,只能在前期勘察的基础上,强化隧道施工地质工作,实施施工地质预报.研究结论:研究创新了"隧道地质复杂程度分级",实现"隧道施工地质预报设计"并纳入规范管理,为隧道施工保驾护航,取得显著效果,使施工地质预报工作迈上新台阶.%Research purposes: The Yichang- Wanzhou Railway is in the very complex geological condition area where was called as the "forbidden zone" of railway construction, and there was a huge geological risk in tunnel construction.The main body of Major tunnel was buried deep inside mountain.The technical means of investigation only could detect the shallow statum, and it was difficult to detect deep stratum.So the contradiction between" Unable to fully detection and requiring full detection" always existed in tunnel construction.In order to solve this contradiction, what to do was to strengthen the geological survey work by conducting geological forecast for tunnel construction based on the previous geological survey.Research conclusions: The "classification of geological complexity in tunnel construction" was researched and developed to realize the "geological prediction design for tunnel construction" and place it into the standard management range.This method could ensure the safe construction of tunnel and push forward the geological forecast work with obtaining good result.