乌鲁木齐市大西沟管道引水工程设计要点及解决方案

文章介绍了乌鲁木齐大西沟管道引水工程总体布置,针对工程总水头落差大,单级压力高,压力分区多,输水距离长,冬季气温低,上游总输砂量大的特点,设计在全国范围内为首次应用了DN2400工作压力为2.5MPa的K9球墨铸铁管,并结合PCCP管解决了输水距离长的难题;优选4级压力分区以降低单级压力,制定综合水锤综合防护措施确保管道压力合理和工程安全;采用淹没式套筒消能阀解决工作压力大和阀前阀后压差大等难题.上述解决方案兼具先进性和实用性,具有良好的推广和应用前景,为解决类似工程设计难题提供了重要依据.

Design Solution and Keypoints for Daxigou Pipeline Water Diversion Project in Urumqi

General layout of Daxigou Pipeline Water Diversion Project in Urumqi is introduced, and engineering characteristics with large in total head, high in single pressure, difficult in pressure partition, long in diversion distance, low in winter temperatures, large in total upper-stream sand are presented in the paper, the K9 cast-iron pressure pipe with working pressure of 2.5MPa combined with PCCP pipe are adapted to solve design keypoint of long diversion distance, 4 stage pressure partition is selected to reduce single stage pressure, water hammer pressure comprehensive protective measures and submerged sleeve valve are designed for the safety of engineering. It is indicated that solution methods are helpful for safety and liability in engineering.