六枝特区河头上水库工程坝型比选分析

Comparison Analysis of Dam Type of Hetoushang Reservoir Project in Liuzhi Special Zone

在选定坝线上经坝型适应性综合分析确定比选坝型范围,进而经地形地质等多方面综合比选优化坝型是做好水库工程规划建设的重要环节,具有重大工程意义。为此,结合河头上水库工程坝型比选分析实例展开坝型比选分析研究。分析结果表明,选定坝址两岸左陡右缓,为页岩、泥岩不等厚互层,坝基持力层为T2g1泥质灰岩,坝轴线处发育F0小断层,设计拟定混凝土面板堆石坝、碾压混凝土重力坝两种坝型进行枢纽布置的技术经济比较。面板堆石坝地质条件适应性好、施工工期短、节省直接工程投资及工程风险较小。因此,确定混凝土面板堆石坝为基本坝型。

A comprehensive analysis of the adaptability on the selected dam line determines the dam type range,and then the topography and other comprehensive selection of the optimal dam is an important link in the planning of reservoir project construction,and has great engineering significance.Therefore,a dam type comparison analysis study was carried out in conjunction with an example of a dam type comparison analysis for the Hetoushang reservoir project.The analysis results show that the banks of the selected dam site are steep on the left and slow on the right,with shale and mudstone in unequal thicknesses,and the bearing layer of the dam foundation is T2gl argillaceous limestone,and FO small fault is developed at the dam axis.Two types of concrete face rockill dam and RCC gravity dam are designed for technical and economic comparison of the hub layout.Panel rockfill dam have good adaptability to geological conditions,short construction periods,less direct engineering investment and less engineering risk.Consequently,the concrete panel rockfill dam is identified as the basic dam type.