摘要
针对高速公路边坡稳定性评价中稳定性系数与失稳概率混合使用的现状,结合西部高寒、高海拔、高地震烈度的地质环境特点,提出高速公路边坡稳定性系数与失稳概率之间的转换关系。简述可靠指标相关原理,参考相关规范标准,提出边坡可靠性分级标准;基于GEO-slope中的可靠性分析模块,对岩土体参数进行敏感性分析,发现内摩擦角φ的变异特性对边坡可靠性最为敏感;根据现场调查、室内外试验研究,找出"三高"地区典型岩层岩性的变异范围。以此为基础,统计分析提出适合"三高"地区高速公路边坡稳定性系数与失稳概率之间的转换关系。为"三高"地区边坡稳定性快速评价提供技术支撑,对相关地区高速公路的勘察、设计具有一定的参考价值。
In view of the current situation of the mixed use of stability coefficient and failure probability in stability evaluation of highway slope,the transitional relationship between the slope stability coefficient and the failure probability of the expressway is put forward in the light of the geological environment characteristics of the high cold,high altitude and high seismic intensity in the West.The relevant principles of reliability index are briefly described.With reference to the criteria for slope stability classification,the slope reliability classification standard is proposed.Based on the reliability analysis module in GEO-slope,the sensitivity analysis of rock and soil parameters is carried out.It is found that the variation characteristic of the internal friction angle is most sensitive to the reliability of the slope.According to the field investigation,indoor and outdoor experiments,the parameter variation range of typical rock lithology in“three high”region is given.On the basis of this,the transitional relationship between the stability coefficient and failure probability of highway slope suitable for"three high"region is put forward after a lot of statistical analysis.The conclusion provides technical support for rapid evaluation of slope stability in“three high”region,and has reference value for highway exploration and design in related areas.
作者
司马丹琪
李元松
姜成潼
何泉
SIMA Danqi;LI Yuansong;JIANG Chengtong;HE Quan(School of Civil Engineering and Architecture,Wuhan Institute of Technology,Wuhan,Hubei 430074,China)
出处
《中国地质灾害与防治学报》
CSCD
2018年第5期32-37,共6页
The Chinese Journal of Geological Hazard and Control
基金
武汉工程大学研究生创新基金(CX2017037)
