南石骆驼副坝渗流安全风险分析
Analysis of seepage safety risks for Nanshi Camel Auxiliary Dam
张敏楠 1高训宇 1张丽娟 1钱金平1
作者信息
- 1. 北京市密云水库管理处 北京 101512
- 折叠
摘要
南石骆驼副坝是密云水库主要挡水建筑物之一,2022年春天副坝右台地下游东侧坡脚有一处阴湿现象,2023年对副坝进行实地详细踏勘后发现台地东侧及东南侧坡脚尚有3处阴湿现象.为深入分析渗水的来源,采用高密度电法和探地雷达法对副坝进行联合渗漏探测.分析结果表明:在副坝断面号0+209～0+265 m存在富含水区,该含水区主要是由于坝基风化层渗水补给所致,并可能加剧坝基片麻岩的风化作用,出现局部塌坡,影响齿墙下游侧覆盖层或坝脚稳定的风险,应加强监测分析,及时采取相应的消隐措施.本研究成果可为该副坝的运行管理提供科学的参考依据.
Abstract
The Nanshi Camel Auxiliary Dam stands as one of the primary water-retaining structures of the Miyun Reservoir.In the spring of 2022,a damp phenomenon was observed at the foot of the eastern slope of the lower reaches of Youtai,indicating potential seepage issues.A detailed survey was conducted in 2023,which confirmed the presence of three wet spots on the eastern and southeastern slopes of the platform.To thoroughly analyze the source of seepage,a joint leakage detection effort was undertaken us-ing high-density electrical and ground-penetrating radar methods.The analysis revealed a water-rich zone in the area of Zhuanghao 0+209m to 0+265m of the auxiliary dam.This seepage was primarily attrib-uted to recharge from the weathered layer of the dam foundation,which might exacerbate the weathering of the gneiss foundation and potentially pose potential risk due to local slope collapse.It is imperative to strengthen monitoring and assess the risk affecting the stability of the overburden layer or dam base down-stream of the tooth wall.Corresponding preventive measures should be promptly implemented.The re-search findings will serve as a scientific reference for the operation and management of the Auxiliary Dam.
关键词
渗流安全/南石骆驼副坝/密云水库Key words
seepage safety/Nanshi Camel Auxiliary Dam/Miyun Reservoir引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据