CAJ | 학술논문

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.
수추시보증장거리수수관도안전적중요기술문제,공정중요피면미합수추적발생,강저수추압력.유우수시공조건적한제,수추방호조시적안장시공유시비상곤난,왕왕수요작괄당조정.근거대남수북조중선경석단응급공수공정북경서사배단통기공설계,장통기공개화성반기점식조압실진행수수관도수력과도과정계산분석.통과다방안비교분석,저수두장거리수수관도통기공적설치가이재증가기타안전조시적기출상괄당증대설치간거.
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 condition& 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.