摘要
三峡库区龚家方斜坡2008年11月23日发生崩塌后,其后缘残留大量危岩体,严重威胁长江航道安全。当地政府决定对其进行人工清除,以消除隐患。作者建立了一种以高清摄像机和高频水位计为主的简易涌浪野外观测方法,用以监测爆破产生碎屑流形成的涌浪。以2011年1月17日爆破清方事件为例,文章展示了野外设备安装和监测到的滑坡涌浪过程。监测分析表明,该次爆破碎屑流入水速度约为31 m/s,入水体积约250 m3;产生的涌浪较小,为波群形态,初始涌浪可表达成2个简单三角函数的叠加。该涌浪应急监测方法简便、易行、有效,所得监测数据可为滑坡涌浪研究提供宝贵的野外原始资料;方法可为地质环境条件类似地区的滑坡涌浪简易或应急监测提供借鉴。
The Gongjiafang slope collapsed on November 23,2008 in the Three Gorges Reservoir and the residual dangerous rock mass was found at the crown edge,which posed a serious threat to the safety of the Yangtze River watercourse. The local government decided to artificially erase the rock mass and eliminated this hidden hazards. With high-definition camera and high-frequency water gauge,the authors employed a simple wave height observation method to monitor waves generated by the debris. Based on the impulsive wave case generated by the blast-triggered rocks on January 17,2011,this paper shows that field device installation,landslide and following impulse wave process. The monitoring analysis reveals that the resulting debris slid into the water at about 31 m / s, and the volume of the sliding mass into the water was approximately 250 m3. It generated a wave group comprising small waves,and the initial wave was seen as the superposition of two trigonometric functions. Since this surge emergency monitoring method is easy and effective,this method can serve as an important reference for simple or emergency monitoring of landslidegenerated waves in reservoirs worldwide and its result can provide valuable field source data for the study on landslide-induced waves.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2015年第4期114-120,共7页
Hydrogeology & Engineering Geology
基金
国家自然科学基金项目(41372321)
国土资源部中国地质调查局灾害预警项目(1212011014027)
关键词
涌浪野外监测
三峡库区
龚家方残留危岩体
波群
impulse wave situ monitoring
Three Gorges Reservoir
Gongjiafang residual dangerous rockmass
wave group
