CAJ | 학술논문

本文从地形地貌条件、岩土体工程地质条件、水动力条件等方面对宁波某地丘陵区台风诱发群发性坡面泥石流的特征及成因进行了分析.通过分析揭示该区坡面泥石流具有流域规模小、流程短、隐蔽性强的特征,通常发生于地形坡度30~45°、具有一定厚度残坡积层的陡坡地.其成因机理主要是松散土体遇持续强降雨作用,先发生浅部松散层滑坡,进而在动水压力作用下滑坡体顺陡坡表面下泻造浆形成坡面泥石流.通过对该坡面泥石流的分析以期为宁波乃至浙东丘陵区类似坡面泥石流的防治提供经验.
본문종지형지모조건、암토체공정지질조건、수동력조건등방면대저파모지구릉구태풍유발군발성파면니석류적특정급성인진행료분석.통과분석게시해구파면니석류구유류역규모소、류정단、은폐성강적특정,통상발생우지형파도30~45°、구유일정후도잔파적층적두파지.기성인궤리주요시송산토체우지속강강우작용,선발생천부송산층활파,진이재동수압력작용하활파체순두파표면하사조장형성파면니석류.통과대해파면니석류적분석이기위저파내지절동구릉구유사파면니석류적방치제공경험.
The paper analyzes the characteristics and genesis of the hill slope debris flow in someplace of Ningbo from geomorphology engineering geology and hydrodynamics. The article reveals the hill slope debris flow characterized by small basin area,short process,and concealment well, it usually occurs in the steep slope of 30~45°.Its formation mechanism is mainly in continuous heavy rainfalls tend to cause mass slides of soil in slope dimples, and than under the action of dynamic water pressure the mud flow from the hill slope and become the slope debris flows .The analyses of the characteristics and causes provides experience for preventing the slope debris flows in Ningbo even the east part of Zhejiang.