摘要
某抽水蓄能电站地处川西藏东高山峡谷区,地形切割深度较大,地质构造复杂,受地震、强降雨影响易产生沟谷型泥石流,对水电工程选址与安全运营构成潜在威胁。本文以加米沟泥石流为研究对象,通过野外调查与历史资料分析,研究发育特征与动力特性,并对其进行危害评价。结果表明:(1)加米沟泥石流物源以崩坡积物、沟床堆积和坡面冲刷物源为主,物源较丰富;(2)P为20%~1%降雨条件下泥石流峰值流量为23.65~90.92 m^(3)/s,属小型~中型规模泥石流;(3)现状条件下,危险性及易发程度评分分别为79和93,属发育、中等易发泥石流沟。研究成果为该沟治理及某抽水蓄能电站工程建设提供了重要依据。
There is a pumped storage project which is located in the high mountains and deep valleys of the eastern Xizang region in Sichuan,characterized by significant terrain relief and complex geological structures.The area is prone to gully-type debris flows due to seismic activity and heavy rainfall,posing threats to the site selection and safe operation of hydropower projects.This study focuses on the Jami Gully debris flow,analyzing its developmental characteristics and dynamic properties based on field investigations and historical data,followed by a hazard assessment.The results indicate:(1)The debris flow material sources in Jami Gully primarily consist of slope collapse deposits,gully bed accumulations,and surface wash materials,with relatively abundant material sources;(2)Under rainfall conditions with a 20%~1%probability,the peak debris flow discharge ranges from 23.65 to 90.92 m^(3)/s,classifying it as a small to medium-scale debris flow;(3)Under current conditions,the hazard and susceptibility scores are 79 and 93,respectively,indicating a developed gully with moderate susceptibility to debris flows.The research findings provide crucial references for the gully control and the construction of the pumped storage project.
作者
田俊生
TIAN Junsheng(Sichuan Datang International Ganzi Hydropower Development Co.,Ltd.,Chengdu 610091,China)
出处
《四川水力发电》
2026年第1期117-125,共9页
Sichuan Hydropower
关键词
沟谷型泥石流
水电工程
发育特征
动力特性
危害评价
Gully-type debris flow
hydropower project
developmental characteristics
dynamic characteristics
hazard assessment
