摘要
水锤是保证长距离输水管道安全的重要技术问题,工程中要避免弥合水锤的发生,降低水锤压力。由于受施工条件的限制,水锤防护措施的安装施工有时非常困难,往往需要作适当调整。根据对南水北调中线京石段应急供水工程北京西四环段通气孔设计,将通气孔概化成半气垫式调压室进行输水管道水力过渡过程计算分析。通过多方案比较分析,低水头长距离输水管道通气孔的设置可以在增加其它安全措施的基础上适当增大设置间距。
Water hammer is the key point of security for long-distance water drainage pipes. Column separation water hammer must be avoided in any projects and hydraulic transient pressure should be decreased. But sometimes, water hammer protection works are very difficult to construct because of the limitation of poor construction conditions. And it is necessary to make a slight change of the positions of air vents. According to the design of air vents in the Beijing West Fourth Ring reach of the Middle Route Project of the South to-north Water Diversion,air vents can be simplified as semi-air cushion surge chambers to calculate the hydraulic transients. By comparison of some schemes,space intervals of air vents in low-water-head long-distance water diversion pipes can be slightly longer if there are some additional water hammer protection works already.
出处
《南水北调与水利科技》
CAS
CSCD
2010年第2期10-12,共3页
South-to-North Water Transfers and Water Science & Technology
关键词
南水北调中线
输水安全
优化
水力过渡过程
水锤
the Middle Route Project of South-to-North Water Diversion
water supply security
hydraulic transients
water hammer
