摘要
应用突变理论,针对山区公路边坡的地质特征,以其力学模型为基础,综合考虑作用于后缘张裂隙的水力效应,构建边坡系统的尖点突变模型,推导出边坡极限状态下后缘张裂隙临界充水高度,并据此得到临界降雨强度的计算公式,建立了边坡突变失稳的气象判据。同时以陕南秦岭山区G316国道某滑坡为例,进行算例分析。分析结果表明,模型计算结果与实际情况较为一致,从而为山区公路滑坡预警预报的研究提供一个新的思路。
Based on hydrogeologic conditions and geomechanics model of highway slope in mountainous areas,a new catastrophic model on slope stability is established in consideration of the static water pressure of top splay fracture. Equations for calculating the critical water highness in the splay fracture and the critical rainfall intensity are developed by adopting cusp-catastrophic theory. The meteorological criterion of highway slope failure is put forward. At the same time,it is illustrated using the landslide on the No 316 national road in the southern Shaanxi Province. The results calculated by above model agree well with the observed ones,providing a new approach for the prediction of highway landslide.
出处
《水土保持通报》
CSCD
北大核心
2010年第4期125-128,共4页
Bulletin of Soil and Water Conservation
基金
国家自然科学基金项目"辽东湾海岸带海蚀致灾机理及动力稳定性研究"(40902075)
沈阳建筑大学岩土与道路工程省级重点实验室开放基金项目(YT-200905)
中共高校基本科研业务费专项基金(2009QN130)
关键词
公路边坡
突变理论
临界充水高度
降雨强度
highway slope
catastrophic theory
critical water highness
rainfall intensity
