千岛湖配水工程渌渚江倒虹吸管布置优化设计

Optimization design of Luzhu River inverted siphon in Qiandao Lake water distribution project

杭州市千岛湖配水工程渌渚江倒虹吸段地质条件较差,周边影响因素较多。对倒虹吸管原设计布置方案进行了优化设计,将右岸台地段输水钢管抬高5 m,并从结构稳定性与施工条件对原方案与优化方案进行综合比较分析,认为优化方案可行且具备明显优势。优化方案较原设计方案土方开挖及回填量均减少13万m3,工期可减少3个月,且开挖料临时堆场规模减小,有利于环境保护。

Luzhu River inverted siphon in Qiandao Lake water distribution project has some construc-tion difficulties, such as adverse geological condition and many influence factors of surrounding environ-ment. In this paper, the original design and layout of inverted siphon are optimized. The optimizationscheme raises the water supply steel pipe on the right bank by 5 m. Based on the structural stability andconstruction conditions, a comprehensive comparison and analysis of the original scheme and the opti-mized scheme are made. The results show that the optimization scheme is feasible and has obvious ad-vantages, such as reducing the amount of excavation and backfill of 1.3×105m3, shortening the construc-tion time by three months and better protection of environment.