长梁山隧道F_(26)断层施工超前地质预报

Geological Prediction in F_(26) Fault Zone of Changliangshan Tunnel

研究目的:在隧道施工中,准确预报施工前方地质条件,尤其是区域断层的规模、性质和影响范围,将影响施工质量、工期与安全。研究方法:在采用针对性地质调绘、掌子面素描、综合物探、水文长期观测等综合方法基础上,进行相关性分析。研究结果:采用节理相关性预报断层在洞内的出现里程位置,并推导出相关公式。研究结论:经施工验证F26断层采用的综合超前预报技术是合理的、有效的;运用节理相关性分析方法,预报了断层在洞内的出现里程位置;地质超前预报应针对地质特点,选取相应的预测预报技术。

Research purposes： During tunnel excavation procedure, the geological predictions in advance for the area in front the construction site, especially the prediction of scale, nature and influencing scope of the regional faults are very important to the construction quality, schedule and safety.Research methods：The relative analysis is made on the base of geological survey, working face sketch, comprehensive physical prospecting, long- term hydrologic observations and other comprehensive methods.Research results：The location of the fault in the tunnel can be predicted by adopting the relative joints nature, and the relating formulas are derived.Research conclusions：The construction practice shows the comprehensive prediction technology adopted in F26 fault zone is reasonable and effective. The fault location in tunnel is predicted by the method of joint relativity analysis. The different prediction technologies should be adopted according to the different geological conditions.