三峡水库区危岩研究及防治新理念

New concept of research&control of dangerous-rock mass in the Three Gorges Reservoir Region

危岩是三峡库区主要的地质灾害类型之一。具有分布面广、稳定性差、危害严重等特点。论文以地质灾害防治系统工程方法论为指导思想,构建了三峡库区危岩研究及防治理念。研究认为,基于对危岩失稳类型、荷载及其组合的研究,进行危岩稳定性研究;以危岩体目标稳定系数和在设定荷载组合下的稳定系数之差为依据进行危岩锚固及支撑研究,建立了相应的计算公式。遵循危岩发育规律,主动防治和被动防治相结合,构建了针对整个防治工程的宏观防治技术和针对危岩体的微观防治技术并强调了充分利用支撑技术、谨慎使用清除技术的新理念。探讨了三峡库区危岩进一步研究的系列关键问题。

As one of typical geologic hazards in the Three Gorges Reservoir Region dangerous-rock mass display some features such as extension in distribution,fair stability and strong hazard.Taking the systematic methodology of geologic controlling as the guide,the authors establish some new concepts of research and control of dangerous-rock in the Three Gorges Reservoir Region in this paper.Following as these new concepts,based on the research on unstable classification of unstable rock mass,loads and its constitution,the authors make studies of stability of dangerous-rock mass.Using stability coefficient difference between at present and at known state,the authors make support and anchorage research,and further establish relative formulas.According to development of unsta-ble rock mass while together active control with passive control,the authors establish macro-control techniques for the control engineering and micro-control techniques for unstable rock mass.Especially it is suggestted that support technique can be applied extensively but clear technique must be applied limitedly.At the end the authors put fore-ward some key problems for dangerous-rock mass research in the future.