砒砂岩区典型坡面稳定特征及空间组合结构  

Study on Stabilization Mechanism and Spatial Assembly Structures of Typical Slope of Small Watershed in Pisha Sandstone Area

作　　者：乔贝[1] 张磊 冯伟风[4] 杨久俊 QIAO Bei ZHANG Lei FENG Weifeng YANG Jiujun(College of Materials Science and Engineering, Tianjin Chengjian University, Tianjin 300384, China Key Laboratory of Soft Soil Engineering Character and Engineering Environment of Tianjin, Tianjin 300384, China Engineering Research Centre of Construction Waste and Coal Waste Recycle Technology of Tianjin, Tianjin 300384, China Tianjin Research Institute of Building Science Co., Ltd., Tianjin 300384, China)

机构地区：[1]天津城建大学材料科学与工程学院,天津300384 [2]天津市软土特性与工程环境重点实验室,天津300384 [3]天津市建筑垃圾与燃煤废弃物利用技术工程中心,天津300384 [4]天津市建筑科学研究院有限公司,天津300384

出　　处：《人民黄河》2016年第6期26-29,共4页Yellow River

基　　金："十二五"国家科技支撑计划项目(2013BAC05B00)

摘　　要：在对砒砂岩区小流域内的典型坡面进行调研的基础上,研究了不同类型坡面的特征,并将具有不同堆积类型和稳定特性的砒砂岩坡面划分为8个基本单元和24种坡面空间组合结构。分析结果表明：覆沙砒砂岩的稳定坡度主要分布在（35±2）°;黄土覆盖的砒砂岩坡面坡度小于黄土自然状态下的临界坡度,稳定坡度集中分布在35°～45°;白色砒砂岩裸露坡面的坡度集中分布在35°～70°,红白交错层状分布裸露砒砂岩坡面的稳定坡度集中分布在35°～45°;覆盖黄土砒砂岩区域,以黄土垂直节理发育单元-红白相间砒砂岩不稳定单元-溜沙坡单元组成的坡面所占比例最高,为14.32%,而在没有黄土覆盖的区域内,由红白相间砒砂岩不稳定单元-溜沙坡单元组成的坡面所占比例最高,为24.23%。Based on the stability characteristics and different types of typical slopes of small watersheds in Pisha sandstone area, Pisha sandstone slope was divided into 8 basic units and 24 slope types. The results show that stable angle of covering sand of Pisha sandstone is mainly concentrated in the range of（35±2）°. Covering loess slope angles are less than the critical angle itself under the natural conditions and are concentrated in the range of 35°-45°. Slope angle of white Pisha sandstone is mainly ranging from 35° to 70° and red and white cross layered slope is mainly ranging from 35° to 45°. In covering loess area, loess vertical unit red and white sandstone unstable units-slip sand slope units reaches the highest percentage of 14.32%. In uncovering loess area, red and white sandstone unstable units-slip sand slope units reaches the highest percentage of 24.23%.

关 键 词：砒砂岩 典型坡面 稳定角度 组合结构 

分 类 号：P313.1[天文地球—固体地球物理学]