陈明, 王运生, 梁瑞锋, 杨栓成. 2018: 白龙江流域大型滑坡发育分布规律研究. 工程地质学报, 26(2): 325-333. DOI: 10.13544/j.cnki.jeg.2017-037
    引用本文: 陈明, 王运生, 梁瑞锋, 杨栓成. 2018: 白龙江流域大型滑坡发育分布规律研究. 工程地质学报, 26(2): 325-333. DOI: 10.13544/j.cnki.jeg.2017-037
    CHEN Ming, WANG Yunsheng, LIANG Ruifeng, YANG Shuancheng. 2018: RESEARCH ON DEVELOPMENT AND DISTRIBUTION RULES OF LARGE-SCALE LANDSLIDES IN BAILONGJIANG RIVER BASIN. JOURNAL OF ENGINEERING GEOLOGY, 26(2): 325-333. DOI: 10.13544/j.cnki.jeg.2017-037
    Citation: CHEN Ming, WANG Yunsheng, LIANG Ruifeng, YANG Shuancheng. 2018: RESEARCH ON DEVELOPMENT AND DISTRIBUTION RULES OF LARGE-SCALE LANDSLIDES IN BAILONGJIANG RIVER BASIN. JOURNAL OF ENGINEERING GEOLOGY, 26(2): 325-333. DOI: 10.13544/j.cnki.jeg.2017-037

    白龙江流域大型滑坡发育分布规律研究

    RESEARCH ON DEVELOPMENT AND DISTRIBUTION RULES OF LARGE-SCALE LANDSLIDES IN BAILONGJIANG RIVER BASIN

    • 摘要: 通过对白龙江流域大型滑坡的现场调查和遥感解译,共调查大型滑坡259处,对流域内大型滑坡的发育分布有了总体的认识;在此基础上,利用GIS技术对大型滑坡的分布与距断裂距离、高程、岩性等因素的关系进行统计分析。研究认为:(1)流域内大型滑坡分布在区域上表现出沿河流水系呈线状分布和沿断裂带呈带状分布的特点;(2)流域内90%以上的大型滑坡分布在距断层距离小于5.0 km的范围内,距断层越远,大型滑坡发育数量越少;同时,集中分布在断裂交叉、错列及交汇部位;(3)流域内大型滑坡表现出与高程和微地貌很好的对应关系,大部分大型滑坡分布在1200~2600 m(上游2200~2600 m、中游1600~2200 m、下游1200~1600 m)以下的河谷峡谷段,尤其是宽谷向峡谷转折部位;(4)流域内软硬相间层状岩岩组最有利于大型滑坡发育,93%以上的大型滑坡与千枚岩、板岩等浅变质岩相关;(5)流域内大型滑坡主滑方向以NE向、W向为主,但是武都区两水镇至舟曲县腊子口乡一带表现出与断层走向基本一致的特征,即SE向和NW向为主;(6)流域内大型滑坡的滑移距离与滑坡体积有关,随着滑坡体积的增大,大型滑坡的运动性摩擦系数呈指数降低,部分大型滑坡表现出强碎屑流特征。

       

      Abstract: After filed investigation and interpretation of remote-sensing images, 259 large-scale landslides have been obtained, and general distribution situation of large-scale landslides has been learnt. Then, the distribution of these large-scale landslides is investigated statistically using GIS techniques to determine the correlations between the occurrence of large-scale landslides and the distance from the fault, elevation and rock group type. The main results are summarized as follows:(1)The large-scale landslides show the feature of zonal distribution along the fault and linear distribution along the rivers. (2)More than 90% of the large-scale landslides are distributed within the range of 5.0 km from the fault, and the farther from the fault, the lower number of large-scale landslides. At the same time, the large-scale landslides are mainly distributed in the zones closely related with the crossing, staggering and transforming section of the fault. (3)The large-scale landslides have corresponding relationship with the elevation and micro-landform. Most large-scale landslides occur in river valley and canyon section below the elevation of 1200 to 2600 m(upstream is 2200 to 2600 m, midstream is 1600 to 2200 m, downstream is 1200 to 1600 m), particularly in the upper segment of canyon section. (4)The soft and hard stratified rock group in the basin is most favorable for the development of large-scale landslides. More than 93% of the large-scale landslides are associated with phyllite and slate metamorphic rocks.(5)The main sliding directions are the NE and W. But it shows the same characteristics as the strike of the fault, namely SE and NW oriented in Liangshui, Wudu to Lazikou, Zhouqu.(6)The sliding distances of the large-scale landslides are related to the volume of the landslide. As the landslide volume increases, the friction coefficient of the large-scale landslides decreases exponentially. Some large-scale landslides show strong debris flow characteristics.

       

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