[1]熊婉丽,黄凡源,曹进,等.市政工程中不同出流方式下的多种井尺寸计算[J].中国给水排水,2021,37(22):79-83.
XIONG Wan-li,HUANG Fan-yuan,CAO Jin,et al.Calculation of Various Well Sizes under Different Outflow Modes in Municipal Engineering[J].China Water & Wastewater,2021,37(22):79-83.
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XIONG Wan-li,HUANG Fan-yuan,CAO Jin,et al.Calculation of Various Well Sizes under Different Outflow Modes in Municipal Engineering[J].China Water & Wastewater,2021,37(22):79-83.
市政工程中不同出流方式下的多种井尺寸计算
中国给水排水[ISSN:1000-4062/CN:12-1073/TU]
卷:
第37卷
期数:
2021年第22期
页码:
79-83
栏目:
出版日期:
2021-11-17
- Title:
- Calculation of Various Well Sizes under Different Outflow Modes in Municipal Engineering
- 摘要:
- 市政工程中配水井、跌水井等构筑物应尽量避免水流撞击井壁，并以此作为确定井最小尺寸的依据之一。井内水流射程与水流的出流方式、运动状态等有关。通过分析自由溢流、有压出流下对井体尺寸的要求，得出：自由溢流可根据实用堰堰面曲线设计公式计算水流跌落水平距离；有压出流可根据能量方程计算水流出口流速，以平抛运动公式计算水流水平距离；对于折板竖井，根据相关试验的建议取值，推导出仅与设计流量相关的经验公式，可从满足通气要求及避免水流撞击井壁两方面确定竖井尺寸。
- Abstract:
- In municipal engineering, water distribution well, falling well and other structures should try to avoid water hitting the well wall, and it is one of the criteria to determine the minimum size of the well. The range of the water flow in the well is related to the outflow mode and motion of the water flow. The requirements for the size of the well under free overflow and pressurized outflow were analyzed. For free overflow, the horizontal distance of the water drop was calculated according to the practical weir surface design formula. For pressurized outflow, the water outlet velocity was calculated according to the energy equation, and the horizontal distance of the water flow was calculated by the horizontal throwing motion formula. For a baffle-drop shaft, the empirical formula related only to the design flow rate that was derived according to the recommended value of the relevant tests, and the shaft size was determined from the two aspects of meeting the ventilation requirements and avoiding the impact of water flow on the shaft wall.
更新日期/Last Update:
2021-11-17