坡体地质条件分析是岩质高边坡稳定性和支护设计的基础,现有的地质分析方法多立足于现象描述和岩体结构分析,缺乏合理的指标反映边坡的结构特性,不便于设计人员应用。介绍坡体结构的概念,然后论述了坡体结构的建立方法,即在边坡地质调查分析的基础上,重点考虑坡体内部的主控制结构面,并全面分析坡体工程地质岩组、临空面特性、地质构造形迹、岩体浅表生改造形迹、自然营力作用结果、地下水发育状况等结构要素,建立坡体结构。通过对西南地区已建与在建工程中边坡地质条件的总结分析,划分了6类10型坡体结构类型,初步建立了坡体结构的分类体系。在此基础上,建立起坡体结构与破坏模式的对应关系,为进一步的稳定性分析和支护设计提供计算模型与方法选择依据,阐述了坡体结构研究结果在边坡工程中的重要应用价值。
The base of stability analysis and supporting design of high slope is geological condi- tions analysis. The existing method of geological analysis, without reasonable index on description of slope structural characteristics, are primarily established in phenomenal description and rock structure analysis, to designer, it is inconvenient for application. In this article, firstly, the concept of slope structure is intro- duced. Then, the establishing method of slope structure is discussed. In this method, slope structure is es- tablished on the slope geological investigation and analysis, with comprehensive analysis about the engi- neering geological petrofabric and free face characteristic and geologic structural feature and result of nat- ural force and groundwater development status and so on, the main control structural plane given a key consideration. The classification system is preliminary established, on the basis of summary and analysis for the slope geological conditions about the built and building project in southwest China, and the slope structure is divided into six kinds and ten types. On this basis, in order to provide further evidence for building calculation model and selection method of the stability analysis and supporting design, the corre- spondence relationship between the slope structure and failure mode is established, this paper elaborates that slope structure study results has strong applied value in slope engineering.