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拟建的丹巴水电站引水系统位于丹巴县境内大渡河左岸,该区域河谷陡峻,地质条件复杂,引水系统的渗漏及渗透稳定性是工程建设的关键技术问题之一.依据工程地质与水文地质资料,建立了研究区30.6km范围的有限元模型,并基于工程区的补给、径流、排泄特征,开展了天然渗流场的反演分析.在此基础上,研究了施工期与运行期长引水隧洞的涌水量的沿线分布特征,并与多种涌水量预测值进行了对比研究.研究表明:引水系统总涌水量约为132 875m3/d,隧洞沿线单宽涌水量在石英岩区域较大,有限元结果与经验公式结果较为吻合,证明了计算结果的可靠性.研究成果对工程建设具有一定参考价值.
The proposed Danba hydropower station water diversion system is located on the left bank of Dadu River in Danba County, with steep valleys and complex geological conditions, and seepage and seepage stability of the diversion system are one of the key technical issues in engineering construction.Based on the engineering geology and hydrology Geology data, a finite element model of 30.6km in the study area has been set up, and based on the recharge, runoff and discharge characteristics of the project area, the inversion analysis of the natural seepage field has been carried out.On the basis of this, the construction period and operation period The results show that the total water inflow of the water diversion system is about 132 875m3 / d, the water inflow per unit width along the tunnel is larger in the quartzite area , The finite element results are in good agreement with the empirical formula results, which proves the reliability of the calculation results.The research results have certain reference value to the project construction.