论文部分内容阅读
关家沟泥石流沟位于文县县城北部,具有极为丰富的物源条件。通过调查从泥石流的岩土体类型及特征、地质构造、水文地质、新构造运动及地震等方面,对物源条件的地质环境背景进行了总结。其松散固体物质主要有滑坡堆积物、崩塌堆积物、滑塌—坍塌堆积物、沟道冲洪积堆积物及面状堆积物等。固体物质总储量为11 570.1×104m3,转化为泥石流组成部分的主要方式包括滑坡、崩塌、滑塌—坍塌直接堆积或堵塞沟道,被水流冲蚀、搬运;滑坡体、崩塌体表层松散物质及沟坡上的面状堆积物在降水面蚀作用下,细粒物质流入沟道,补给泥石流增加了泥石流的黏度;沟道内早期的冲洪积物被泥石流直接搬运、冲蚀,构成泥石流固体松散物质等。通过对物源条件分析,提出了治理工程措施,以期为关家沟泥石流灾害防治提供参考。
Guanjiagou debris flow ditch is located in the northern part of Wenxian County, with very rich source conditions. Through the investigation from the debris flow of rock and soil types and characteristics, geological structure, hydrogeology, neotectonic movement and seismic aspects of the geological conditions of the source of the environment is summarized. Its loose solid material mainly includes landslide deposits, collapse deposits, slump-collapse deposits, channel alluvial deposits and surface deposits. The total amount of solid material reserves is 11 570.1 × 104 m3. The main methods of conversion into debris flow components include landslide, collapse, slump-slump accumulation or blockage of channel directly, erosion by water flow and handling; landslide body, Under the action of surface erosion, the fine sediment flows into the channel, and the recharge debris flow increases the viscosity of the debris flow. The early alluvial sediment in the channel is directly transported and eroded by the debris flow to form loose solid debris flow Substances and so on. Through the analysis of provenance conditions, proposed measures to control engineering, with a view to provide a reference for the prevention and control of debris flow in Guanjiagou.