施工期水电站坝址环境水化学特征研究及其意义——以向家坝水电站为例

发布时间：2018-07-05 07:38

本文选题：水文地球化学 + 施工期坝址环境水　；参考：《水力发电学报》2014年06期

【摘要】：处于施工期的水电站往往缺乏足够的渗流宏观原型监测资料,此可通过其微观动态——水质特征的分析以反映施工过程中区内地质体的水文地质特性以及坝基、坝肩等不同部位处帷幕的防渗性能。本文以向家坝水电站为例,在对不同位置水样进行水化学分析的基础上,首先采用水化学图示法定性地反映各部位的水质特征,然后利用系统聚类方法对各水样点进行划分从而得到4个族群,并对各族群内的水质指标进行统计分析;最后,应用PHREEQC软件进行反向模拟,计算获得坝址渗流过程中各类矿物溶解/沉淀的量及不同渗漏水源所占的比例,从而达到定量解析水—岩相互作用的目的。通过综合应用水文地球化学的各类方法,可以弥补在建工程原型监测资料短缺的困难,达到了解施工期坝址渗漏水体的来源以及评价对大坝基础潜在影响的目的,从而为后续的施工提供科学指导。
[Abstract]:The hydropower stations in the construction period are often lack of sufficient seepage macroscopic prototype monitoring data, which can reflect the hydrogeological characteristics of the interior plastids in the construction process and the impervious performance of the curtain in different parts of the dam foundation and the dam abutment through the analysis of the microscopic dynamic characteristics of the water quality. On the basis of the hydrochemical analysis of the position water sample, the water quality characteristics of each part are reflected by the hydrochemical diagram first, and then the water sample points are divided by the system clustering method to get 4 ethnic groups, and the water quality indexes in each group are statistically analyzed. Finally, the PHREEQC software is applied to the reverse simulation and calculation. In order to achieve the purpose of quantitative analysis of water rock interaction, the amount of various mineral dissolving / precipitation and the proportion of different leakage water sources during the seepage process of the dam site can be obtained. Through the comprehensive application of various hydrogeochemical methods, the difficulty of the shortage of the monitoring data in the construction prototype can be made up to understand the seepage water body of the dam site during the construction period. And the purpose of evaluating the potential impact on dam foundation, so as to provide scientific guidance for subsequent construction.
【作者单位】：河海大学地球科学与工程学院;长江水利委员会长江下游水文水资源勘测局;
【基金】：国家自然科学基金项目(41272265) 江苏省普通高校研究生科研创新计划资助项目(CX10B_218Z)
【分类号】：TV74;X143

【参考文献】