七星河水位调节坝的基础高程设计优化与效益研究OA

The benefits of foundation elevation design optimization for the Qixinghe water level regulating dam are analyzed.The foundation surface elevation of the central dam block 2#was raised from the original design of 35 m to 37 m,while that of the two side dam blocks 1#and 3#were changed from the original design of 35～44 m to 37～44 m,resulting in a reduction of the maximum dam height from 32.9 m to 30.9 m.The calculation results show that when the dam foundation surface elevation is 37 m,the safety factor for deep anti-sliding stability of the bedding planes at and below the base elevation 36 m is greater than the minimum value allowed by the relevant codes.There-fore,the optimized dam has no deep anti-sliding stability issues.Through this design optimization,rock excavation was reduced by 1,250 m3,and C20 concrete consumption was reduced by 1,250 m3,resulting in total cost savings of 603,800 yuan.Additionally,the construction progress was accelerated and the construction period was shortened.