川北某山区水库应急补水工程设计

Design of Emergency Water Supply Project of a Mountain Reservoir in Northern Sichuan

根据应急工程时效性、可靠性要求高的特点,对川北山区幸福水库进行了长距离管道输水补水工程设计,包括水源选择、管道定线、管材选择、管径确定、取水型式、水锤防护、管道试压等。依据山区地形特点采用浮船取水后长距离加压输水,设计管径为DN1 000,设计管长为6. 6km,年均补水2 190×10~4m^3,有效解决了水源灾情危机。结合Bentley HAMMER V8i水锤分析,在输水管道沿程设置了水囊式空气压力罐、水锤泄放阀、活塞式调流阀、弥合水锤预防阀等水锤防护措施,输水一年多的运行结果表明,系统压力控制在1 100 kPa以内,无水柱拉断现象,吨水电耗成本为0. 14元/m^3,系统运行稳定、安全。

According to the characteristics of high timeliness and reliability of emergency projects,a long-distance pipeline water supply project was designed for mountainous Xingfu Reservoir in northern Sichuan, including water sources selection, alignment of pipeline, pipeline material selection,determination of pipe diameter,water intake type,water hammer protection,pipeline pressure test,etc.Based on the topographic characteristics of the mountainous area, long distance pressurized water conveyance was adopted after pontoon water intake. This project was designed with a pipe diameter of DN1 000,a design pipe length of 6. 6 km,and an average annual water supply of 2 190 × 10~4m^3. As a result,the project effectively solved the crisis of water source disasters. Combined with the Bentley HAMMER V8 i water hammer analysis,water hammer protection measures such as water bladder air pressure tanks,water hammer relief valves,piston type flow regulating valves,and bridge water hammer prevention valves were installed along the water pipeline. The results of operation over one year showed that the system pressure was controlled within 1 100 k Pa, there was no water column breaking phenomenon. Consumption of per ton water was 0. 14 yuan/m^3,and the system could be operated stably and safety.