淮河流域取水工程设计优化分析  

Design Optimization of a Water Intake Project in Huaihe River Basin

作　　者：吴伟[1] 周晨[1] 吴昊[1] 朱亮 刘圣宾 WU Wei;ZHOU Chen;WU Hao;ZHU Liang;LIU Sheng-bin(Nanjing Municipal Design and Research Institute Co.Ltd.,Nanjing 210008,China)

机构地区：[1]南京市市政设计研究院有限责任公司,江苏南京210008

出　　处：《中国给水排水》2022年第4期82-87,共6页China Water & Wastewater

摘　　要：颍上县城市地表水厂及配套管网工程总规模为18×10^(4) m^(3)/d,其中取水工程包括取水头部、水源厂及取水泵房,以及两条DN1400钢管引水管线。该工程根据水文及地质等资料,优化了工程选址和方案,采用岸边式取水头部,枯水期沉井施工,避免了在滩地水下开挖作业,既缩减了工期也节省了造价,降低了施工风险。取水泵房采用便于管理的堤内式泵房,双格沉井施工,沉井周围布置一排高压旋喷桩作为隔离桩,减小沉井下沉对大堤的影响。工程中引水管线采用顶管方式穿越大堤,施工中必然会造成地层损失,引发大堤沉降,采用PECK经验法对沉降进行估算,并采取高压摆喷注浆对顶管扰动后的土体进行再次加固。目前该工程已顺利通水,运行状况良好。The total scale of urban surface water plant and supporting pipe network project in Yingshang County is 18×10^(4) m^(3)/d.The water intake project includes intake head,water source plant,pumping house and two DN1400 steel pipes water diversion pipelines.The site selection and scheme of the project were optimized according to hydrology and geological data.The selection of shore-type water intake head and caisson construction in dry season avoided underwater excavation in the beaches,reduced the construction period,saved the construction cost and reduced the construction risk.The pumping house is dike pump house which is easy to manage.It was constructed by double-cell caisson method,and a row of high-pressure jet grouting piles were arranged around the caisson as isolation piles to reduce the impact of caisson sinking on the dike.In the project,the water diversion pipeline crossed the dike by using pipe jacking method.However,the construction would inevitably cause stratum loss and settlement of the dike.Therefore,the settlement of the dike was estimated by PECK empirical method,and the soil disturbed by pipe jacking was reinforced again by high-pressure swing jet grouting.At present,the project has successfully delivered water and runs well.

关 键 词：取水头部 顶管 堤防沉降 地层损失 PECK经验法 

分 类 号：TU991[建筑科学—市政工程]