潜在锁固型滑坡的类型、形成条件和预判方法研究

摘要

Recent research demonstrates that sliding is the most common instability mechanism type of large-scale catastrophic landslides.Usually sliding associates with stress concentration and brittle failure in locked patch(stress concentration and key load-bearing region ).It's the strength and deformation of the locked patch determine the overall stability of the slope which are defined as locked patch landslides by author.Cases of 36 large-scale catastrophic landslides are analyzed in this paper.The types and formation conditions of the locked patch landslides are classified,generalized and summarized.Moreover,a pre-decision method is proposed.The research has the premise of disaster prevention and mitigation for locked patch landslides,and has good scientific significance and guiding value in disaster prevention and mitigation.%已有研究表明滑动是大型灾难性滑坡最常见的失稳机制类型，且滑动过程中一般都伴随滑动面上锁固段（承受应力集中，提供关键承载作用的部位）的应力集中和脆性破坏，其强度和变形决定着边坡的整体稳定性，作者将此类滑坡统称为锁固型滑坡。本文通过分析研究我国36个大型典型灾难性滑坡实例，首次归纳总结了锁固性滑坡的类型和形成条件等共性规律，同时提出了任一边坡能否发展成为锁固型滑坡的预判方法。本文研究成果是锁固型滑坡进一步进行失稳破坏类型预分析、稳定性评价及失稳滑动预报等共性规律的认识和实施防灾减灾措施的前提，具有较好的科学意义和防灾减灾指导价值。