斜坡海拔高度对滑坡贡献率的研究

Study on Contribution of Slope Altitude to Landslide

中国地形地貌复杂,不同海拔高度的地形地貌,反映了坡体所在地区的地质构造、风速、冻融、降水、气温等自然条件与人类活动强度的较大差别,必然会对斜坡的稳定产生不利影响.利用数据库中所收集的国内721处滑坡样本,对不同海拔高度的山地、丘陵、高原、平原、盆地的滑坡贡献率进行了研究分析.分析结果表明：海拔1000-3500 m的中山地形区及50-200m的高平原地形区,滑坡的贡献率权重最大;海拔0-50 m的低平原地形区及大于3500 m的高山地形区,滑坡的贡献率权重最小.

There are complex topographic and geomorphic conditions in China.The landform in different altitudes reflects the large difference between the natural conditions in the place where the slope is located,such as the geological structure,wind speed,freezing and thawing,precipitation and atmospheric temperature,and the intensity of human activities therein,which is inevitable to have adverse influence on the slope stability.Based on the 721 domestic landslide samples collected in the database,the rate of contribution to landslide in mountainous regions,hills,plateaus,plains and basins,which have different altitudes,was studied.The results show that the rate of contribution to landslide has a maximum weight in the medium mountainous regions in the altitude of 1 000 - 3 500 m and the high plains of 50 - 200 m; and a minimum weight in the low plains of 0 -50 m and the high medium mountainous regions more than 3 500 m.