上缓下陡土质高边坡关键块体的破坏模式研究  

Failure Modes of Key Blocks in High Slope with Steep Downward Soil

作　　者：汪儒鸿 周海清 刘琪颖 WANG Ruhong1, ZHOU Haiqing1,2, LIU Qiying1(1. Department of Architectural Engineering, Logistical Engineering University of PIA, Chongqing 401331, China; 2. Key Laboratory of Geomechanics and Geological Environment Protection of Clumgqing Municipality, Chongqing 401331, Chin)

机构地区：[1]陆军勤务学院军事设施系,重庆401331 [2]岩土力学与地质环境保护重庆市重点实验室,重庆401331

出　　处：《水利与建筑工程学报》2018年第3期165-169,共5页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金项目"锚索框架-抗滑桩联合支挡结构的全程受力规律与设计理论的研究"(41272356)

摘　　要：针对部分高边坡坡度变化大,在采取锚索格构类的大范围支挡时存在工程成本高昂,对环境影响较大的问题,在保证安全的前提下,为尽可能的节省该类高边坡的治理成本,缩减施工规模,专门提出针对上缓下陡地形土质高边坡的"关键块体"概念。通过对"关键块体"稳定性及破坏模式的分析,可以为符合条件的高边坡提供局部支挡设计的理论依据。与传统的边坡稳定分析方法相比,"关键块体"分析方法针对性更强,更适合对特殊地形土质高边坡的支挡设计中引为参考。从施工角度来说,该方法为土体临空面较高而难以治理的高边坡提供了新的支挡设计思路,实际应用价值较大。For large changes in the slope of some high slopes,there are problems such as high engineering costs and large environmental impacts when adopting large-scale support for the grid structure of anchor ropes. In order to ensure its safety and save the cost as much as possible. The management cost of high-grade slopes is reduced,and the scale of construction is reduced. The concept of ＂key blocks＂for high-grade slopes with steeply downward slopes is specifically proposed. Through the analysis of the ＂key block＂stability and failure mode,it can provide a theoretical basis for local support design for high slopes that meet the conditions. Compare to the traditional slope stability analysis method,the ＂key block＂analysis method is more pertinent and more suitable for referencing the support design of a special terrain high soil slope. From the perspective of construction,this method provides a new design concept for supporting high-rise slopes with high surface voids and difficult to manage,and has great application values.

关 键 词：关键块体 上缓下陡地形 土质高边坡 局部支挡 稳定分析 

分 类 号：P642.2[天文地球—工程地质学]