古皂水库工程建设方案比选

Comparison and selection of engineering construction schemes for Guzao Reservoir Project

结合古皂水库工程地形条件、地质条件、施工条件、主要工程量、工程用地、水库淹没及工程投资等多方面对上、下坝址及坝型进行技术经济综合比较论证,推荐上坝址为水库坝址。从心墙防渗性及耐久性、心墙对基础的要求、心墙施工难度、主要工程量及工程总投资对黏土心墙堆石坝和沥青混凝土心墙堆石坝进行比较,选用坝型为黏土心墙堆石坝。从地形条件、地质条件、工程布置、基础处理难易程度、天然建筑材料供应条件、施工条件、工程运行安全性、工程占地、环境及水土保持的影响程度和主要工程量及工程总投资对黏土心墙堆石坝和重力坝进行比较,推荐选择坝型为黏土心墙堆石坝。

For Guzao Reservoir Project,the upper and lower dam sites as well as dam type schemes were compared from the aspects of topographical and geological conditions,construction conditions,main construction quantities,land occupation,reservoir inundation compensation and construction cost etc.Based on the results of technical and economic comparison,the upper dam site was recommended.Clay core wall rockfill dam scheme was compared with asphalt concrete core wall rockfill dam scheme in respects of the impermeability and durability of core wall,the re⁃quirements of core wall for foundation,construction difficulties of core wall,main construction quantities and total project cost,based on which clay core wall rockfill dam type was selected.Clay core wall rockfill dam scheme was also recommended after it was compared with gravity dam scheme from the aspects of topographical and geological conditions,project layout;foundation treatment difficulties,supply condition of natural building materials,construc⁃tion conditions,project operation safety,land occupation,environmental impact,soil and water conservation,main construction quantities and total project cost.