甘肃科学学报

为合理评价边坡稳定性及其危险性,以某公路互通边坡为工程背景,在边坡变形特征分析基础上,先开展边坡变形影响因素分析,再以条分法和变形预测分别构建边坡稳定性的现状评价模型和预测评价模型,两者综合实现边坡稳定性研究。实例分析表明:边坡变形是内、外因共同作用下打破原有的力学平衡而导致的,其中,人工因素是边坡失稳的直接诱发因素;在边坡稳定性现状分析方面,天然状态下的稳定性系数介于0.980～1.034,处于不稳定～欠稳定状态,而在暴雨或连续降雨状态下稳定性系数介于0.806～0.862,均小于1,处于不稳定状态,由此可见此边坡现状稳定性相对较弱;在边坡稳定性预测分析方面,边坡后续变形的增加量一般,其稳定性具减弱趋势。综合边坡稳定性现状及预测评价结果表明边坡现状稳定性已较差,加之后续稳定性还会进一步减弱,失稳滑动的可能性极高,对其开展治理已十分迫切。

In order to reasonably evaluate the stability and danger of slopes,taking highway interchange slopes as the engineering background,based on the analysis of slope deformation characteristics,the influencing factors of slope deformation are first analyzed,and then the current evaluation model and prediction evaluation model of slope stability are constructed using the slice method and deformation prediction,respectively.Slope stability research is carried out via combaning these two methods.The results show that slope deformation is caused by the combined action of internal and external factors that break the original mechanical balance,among which artificial factors are the direct factors of slope instability.In terms of analyzing the current situation of slope stability,the stability coefficient under natural conditions ranges from 0.980 to 1.034,which is in an unstable to understable state.Under the condition of rainstorm or continuous rainfall,the stability coefficient is between 0.806～0.862,which is less than 1 and is in an unstable state.Therefore,the current stability of the slope is relatively weak.In terms of slope stability prediction and analysis,the increase in subsequent deformation of the slope is average,and its stability tends to weaken.Based on the current situation of slope stability and the predicted evaluation results,the stability of the slope is already poor.In addition,the stability will further weaken in the future,and the possibility of unstable sliding is extremely high.Therefore,it is urgent to carry out its treatment.