水库枢纽区抬升变形水文地质结构模式研究

发布时间：2018-05-25 16:01

本文选题：水库枢纽区 + 水文地质结构　；参考：《岩土工程学报》2017年11期

【摘要】：水库蓄水引起枢纽区产生抬升变形的现象在国内外水利工程中比较少见。为了解岩体水文地质结构对抬升变形的影响,通过对国内外文献研究,提出了坝基及近坝库岸边坡产生抬升变形的水文地质结构模式:即坝址区存在倾向下游或两岸的相对隔水层,且相对隔水层下存在透水性较大的水文地质结构层。采用流固耦合数值分析方法研究了相对隔水层产状要素变化对抬升变形空间分布规律的影响。研究结果表明:相对隔水层在上游库区的出露区域至坝体距离越近,下游岸坡抬升变形范围越大,抬升变形量也越大;随着相对隔水层倾向下游倾角的增大,枢纽区最大抬升位移呈先增大后减小的变化规律;隔水层倾向角的变化将引起抬升变形空间分布位置的变化。
[Abstract]:The phenomenon of uplift deformation caused by reservoir impoundment is rare in water conservancy projects at home and abroad. In order to understand the influence of hydrogeological structure of rock mass on uplift deformation, A hydrogeological structure model for uplift deformation of dam foundation and bank slope near dam reservoir is put forward, that is, there is a relative water barrier layer in the dam site area, which is inclined to downstream or both sides, and there is a hydrogeological structure layer with high permeability under the relative water barrier layer. In this paper, the influence of the variation of occurrence elements of relative water barrier layer on the spatial distribution of uplift deformation is studied by means of fluid-solid coupling numerical analysis method. The research results show that the closer the distance from the outburst area of the relative barrier layer to the dam body, the larger the range of uplift deformation and the larger the uplift deformation of the downstream bank slope, and with the increase of the relative water barrier layer inclined downstream inclination angle, The maximum uplift displacement increases first and then decreases, and the spatial distribution of uplift deformation changes with the change of inclined angle.
【作者单位】：长沙理工大学水利工程学院;水沙科学与水灾害防治湖南省重点实验室;中国电建中南勘测设计研究院有限公司;
【分类号】：TV221.2

【相似文献】