景洪水电站水库区塌岸时空变化特征及影响因素分析  

Spatio-temporal Variation Characteristics and Influencing Factors of Bank Collapse in Reservoir Area of Jinghong Hydropower Station

作　　者：梁瑞锋 徐鹏 LIANG Ruifeng;XU Peng(PowerChina Kunming Engineering Corporation Limited,Kunming 650051,China)

机构地区：[1]中国电建集团昆明勘测设计研究院有限公司,云南昆明650051

出　　处：《人民珠江》2020年第11期48-54,71,共8页Pearl River

摘　　要：景洪水电站水库区属中山峡谷地貌,地层岩性多变,地质构造复杂。通过2009、2012、2014、2019年先后4次对水库区塌岸进行实地调查和复核,总结和分析该区域塌岸的时空变化特征和影响因素,得到的主要结论有:①截至到2019年调查期间,水库区塌岸共计299处,体积在10~100 m 3的塌岸数量最多,停止发展的塌岸130个,正在发展的塌岸169个;②塌岸呈逐年增长趋势,多分布于地形较陡、松散层厚度较大、岩层风化较强烈的库段,库区以小规模塌岸为主,但有逐步扩大的趋势,具有活动性的塌岸数量增长趋势明显变缓,前期发育的塌岸呈现出逐渐稳定的状态;③特定的地形地貌、较厚的松散介质、不利于水土保持的经济林木及频繁的人类生产活动是引起塌岸的主要因素。The reservoir area of Jinghong hydropower station belongs to the medium mountain canyon landform with variable stratum lithologies and complex geological structures.By investigation and review of bank collapse in the reservoir area in 2009,2012,2014 and 2019,this paper summarizes and analyzes the temporal-spatial variation characteristics and influencing factors of bank collapse.The results show that:①Up to the survey period in 2019,there are 299 bank collapses in the reservoir area.The bank collapse with volume between 10~100 m 3 occupies the first place,130 bank collapses stop developing and 169 bank collapses are developing;②The number of bank collapse is increasing year by year;the bank collapses are mainly distributed in the reservoir section with steep terrain,thicker loose layer and strong weathered rock;the reservoir area is mainly characterized by small-scale bank collapse,but there is a trend of gradual expansion;the increase of bank collapses which are developing is obviously slowing down and the bank collapses in earlier stage show a gradually stable state;③Specific topography,thicker loose layer,economic trees which are unfavorable to soil and water conservation,and frequent human production activities are the main factors for bank collapses.

关 键 词：塌岸 时空变化特征 影响因素 景洪水电站 

分 类 号：P642.2[天文地球—工程地质学]