不同性态坝基帷幕对幕后环境变量的影响分析
发布时间：2018-08-26 16:38
【摘要】：坝基渗流主要受帷幕结构和防渗性能的影响,当其性态发生改变时可引起渗流场、化学场等的变化,并通过渗流量、扬压力以及溶液化学组分等反映出来。为定量研究幕后此类环境变量与帷幕性态改变之间的联系,建立了坝基渗流—溶解耦合模型反映幕后渗流场和化学场的空间分布,并通过局部和全局敏感性分析方法研究了坝基渗流量、幕后扬压力以及Ca2+浓度等环境变量受帷幕性态变化的影响。结果表明,各环境变量主要受帷幕防渗性能的影响,且该影响呈非线性,此特性也造成局部和全局敏感性分析结果略有不同。从性态参数间相互作用来看,无论对渗流场还是化学场,帷幕防渗性能与其他参数间相互作用较大,而帷幕宽度和深度与其他参数的相互作用较小。研究成果可为大坝防渗提供指导。
[Abstract]:Seepage flow in dam foundation is mainly affected by curtain structure and impervious performance. When its behavior changes, the seepage field and chemical field can be changed, which can be reflected by seepage flow, uplift pressure and chemical composition of solution. In order to quantitatively study the relationship between the behind-the-scenes environmental variables and the change of curtain behavior, a coupling model of seepage and dissolution of dam foundation is established to reflect the spatial distribution of backstage seepage field and chemical field. Local and global sensitivity analysis methods are used to study the influence of the environmental variables such as the seepage flow behind the scenes and the concentration of Ca2 on the performance of the curtain. The results show that the environmental variables are mainly affected by the impervious performance of the curtain, and the influence is nonlinear, which also results in slightly different local and global sensitivity analysis results. From the point of view of the interaction between the performance parameters and the other parameters, the interaction between the impervious performance of the curtain and other parameters is greater, but the interaction between the width and depth of the curtain and other parameters is relatively small, both for the seepage field and the chemical field. The research results can provide guidance for dam seepage control.
【作者单位】： 河南省出山店水库建设管理局;南京水利科学研究院水文水资源与水利工程科学国家重点实验室;
【基金】：国家自然科学基金项目(51139001,51309159,51479124);国家自然科学基金青年基金项目(51409167,51609150) 中国博士后科学基金(2016M590477) 水利部公益性行业科研经费专项项目(201401022,201501033,201501036) 河南省水利科技攻关计划项目(GG201656) 中央级公益性科研院所基本科研业务费专项资金项目(Y715012,Y715009,Y715018,Y714015)
【分类号】：TV223.43
，
本文编号：2205513
[Abstract]:Seepage flow in dam foundation is mainly affected by curtain structure and impervious performance. When its behavior changes, the seepage field and chemical field can be changed, which can be reflected by seepage flow, uplift pressure and chemical composition of solution. In order to quantitatively study the relationship between the behind-the-scenes environmental variables and the change of curtain behavior, a coupling model of seepage and dissolution of dam foundation is established to reflect the spatial distribution of backstage seepage field and chemical field. Local and global sensitivity analysis methods are used to study the influence of the environmental variables such as the seepage flow behind the scenes and the concentration of Ca2 on the performance of the curtain. The results show that the environmental variables are mainly affected by the impervious performance of the curtain, and the influence is nonlinear, which also results in slightly different local and global sensitivity analysis results. From the point of view of the interaction between the performance parameters and the other parameters, the interaction between the impervious performance of the curtain and other parameters is greater, but the interaction between the width and depth of the curtain and other parameters is relatively small, both for the seepage field and the chemical field. The research results can provide guidance for dam seepage control.
【作者单位】： 河南省出山店水库建设管理局;南京水利科学研究院水文水资源与水利工程科学国家重点实验室;
【基金】：国家自然科学基金项目(51139001,51309159,51479124);国家自然科学基金青年基金项目(51409167,51609150) 中国博士后科学基金(2016M590477) 水利部公益性行业科研经费专项项目(201401022,201501033,201501036) 河南省水利科技攻关计划项目(GG201656) 中央级公益性科研院所基本科研业务费专项资金项目(Y715012,Y715009,Y715018,Y714015)
【分类号】：TV223.43
，
本文编号：2205513
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