渭北黄土塬区滑坡发育特征及分布规律研究  

Research on Development Characteristics and Distribution of Landslides in Weibei Loess Tableland Area

作　　者：李滨[1,2] 吴树仁[1,2] 石菊松[1,2] 

机构地区：[1]国土资源部新构造运动与地质灾害重点实验室,北京100081 [2]中国地质科学院地质力学研究所,北京100081

出　　处：《水土保持研究》2011年第5期212-216,共5页Research of Soil and Water Conservation

基　　金：中国地质科学院地质力学研究所基本科研项目(DZLXJK201010);中国地质科学院基本科研业务费项目(2010-SYS-18);国家"十一五"科技支撑课题"特大型滑坡早期识别及空间预测技术研究"(2006BAC04B02)

摘　　要：该文利用野外调查、遥感解译、现场勘查等工作手段,分析了宝鸡渭河北岸黄土塬边滑坡的基本类型、发育特征及分布规律,宝鸡渭北黄土塬边滑坡主要受地质构造、河流侧蚀、地层岩性和人类活动等因素的影响,分布在渭河北岸、千河西岸、金陵河东岸、长寿沟等黄土台塬塬边斜坡地带,呈现不均衡性、成群成带性以及同一地点继发性与递进性等特点,滑坡发育分布密度最高可达96.8%。此外,滑坡类型主要有黄土层内滑坡、黄土接触面滑坡、黄土切层滑坡三种类型,以黄土切层滑坡最为发育,占渭北塬区滑坡的80%以上,这类滑坡滑动面主要位于阶地黏土层、三趾马红土层和三门组黏土层中或其表面,滑坡规模巨大,威胁严重。On the basis of field investigation,remote sensing interpretation and engineering geological survey,the basic types,development characteristics and distribution of landslides in Weibei loess tableland edge are analyzed.Due to the geological structure,the river lateral erosion,lithology,human activities and other factors,the maximum density of landslides is up to 96.8%,and landslides distribution in the Loess Plateau edge of the northern bank of Weihe River,the west bank of Qianhe river,the east bank of Jinlinghe river and Changshou gully.Landslides have the following characteristics： imbalances,group-occurring,secondary and progressive in the same pace and so on.In addition,the Baoji-Weibei landlsides consist of three types： loess landslides,loess interface landslides and loess-hardclay cutting layer landslides.The last type of landslides is the most developed which accounts for 80% of the total number of landslides.Their sliding surfaces mainly locates among or between terrace clay,hipparion laterite and Pliocene hard clays.The scale of loess-hardclay cutting layer landslides is always huge and threats Baoji City.

关 键 词：渭北黄土台塬 滑坡 基本类型 发育特征 分布规律 

分 类 号：P642.22[天文地球—工程地质学]