【摘要】：壩基滲流主要受帷幕結(jié)構(gòu)和防滲性能的影響,當(dāng)其性態(tài)發(fā)生改變時(shí)可引起滲流場(chǎng)、化學(xué)場(chǎng)等的變化,并通過(guò)滲流量、揚(yáng)壓力以及溶液化學(xué)組分等反映出來(lái)。為定量研究幕后此類環(huán)境變量與帷幕性態(tài)改變之間的聯(lián)系,建立了壩基滲流—溶解耦合模型反映幕后滲流場(chǎng)和化學(xué)場(chǎng)的空間分布,并通過(guò)局部和全局敏感性分析方法研究了壩基滲流量、幕后揚(yáng)壓力以及Ca2+濃度等環(huán)境變量受帷幕性態(tài)變化的影響。結(jié)果表明,各環(huán)境變量主要受帷幕防滲性能的影響,且該影響呈非線性,此特性也造成局部和全局敏感性分析結(jié)果略有不同。從性態(tài)參數(shù)間相互作用來(lái)看,無(wú)論對(duì)滲流場(chǎng)還是化學(xué)場(chǎng),帷幕防滲性能與其他參數(shù)間相互作用較大,而帷幕寬度和深度與其他參數(shù)的相互作用較小。研究成果可為大壩防滲提供指導(dǎo)。
[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.
【作者單位】： 河南省出山店水庫(kù)建設(shè)管理局;南京水利科學(xué)研究院水文水資源與水利工程科學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51139001,51309159,51479124);國(guó)家自然科學(xué)基金青年基金項(xiàng)目(51409167,51609150) 中國(guó)博士后科學(xué)基金(2016M590477) 水利部公益性行業(yè)科研經(jīng)費(fèi)專項(xiàng)項(xiàng)目(201401022,201501033,201501036) 河南省水利科技攻關(guān)計(jì)劃項(xiàng)目(GG201656) 中央級(jí)公益性科研院所基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金項(xiàng)目(Y715012,Y715009,Y715018,Y714015)
【分類號(hào)】：TV223.43
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本文編號(hào)：2205513