水流和风对拦漂排的作用荷载计算  

Calculation of water current and wind load on floating trash barrier

作　　者：钟全胜 胡彩石 陈辉春 曹园园 ZHONG Quansheng;HU Caishi;CHEN Huichun;CAO Yuanyuan(PowerChina Zhongnan Engineering Corporation Limited,Changsha 410014,Hunan,China)

机构地区：[1]中国电建集团中南勘测设计研究院有限公司,湖南长沙410014

出　　处：《水利水电技术（中英文）》2021年第S02期275-279,共5页Water Resources and Hydropower Engineering

摘　　要：针对目前设计中计算水流和风对拦漂排的作用荷载存在漏项和阻力系数取值不统一的问题。将作用荷载进行分类,包括水流力、风荷载和漂浮物荷载,总结船舶、港口、浮桥及水电等工程的计算方法,得到浮箱摩擦阻力、格栅和浮箱涡流阻力、风荷载、漂浮物水流推力及风对漂浮物拖曳力的计算公式,并根据水力学明渠流知识推导得到水流对漂浮物的拖曳力计算公式,以上公式可对水流和风对拦漂排的作用荷载进行全面计算,避免漏项。其中,提出的浮箱涡流阻力系数计算公式解决了该系数取值随意的现状。通过实例分析,提出计算工况的荷载组合方式,明确漂浮物荷载计算的重要性,指出设计图纸应说明漂浮物的允许滞留长度,为后续水电水利工程拦漂排的设计提供帮助。In order to solve the problem that there are omissions and resistance coefficient are not uniform when calculating the load of water current and wind on the floating trash barrier.Classify the load caused by water current and wind on the floating trash barrier,including water current force,wind load and floating object load.Summarize the calculation methods of ships,ports,pontoons and hydropower projects,and obtain the calculation formulas for the frictional resistance of the pontoon,the eddy resistance of the grid and the pontoon,the wind load of the pontoon,the water current force and the drag force of the wind on floating objects.And,based on the knowledge of open channel flow in hydraulics,a formula for calculating the drag force of water flow on floating objects is derived.Through case analysis,the load combination method for calculating working conditions is put forward,the importance of floating object load calculation is clarified,and the design drawing should indicate the allowable length of floating objects.The above calculation formulas can be applied to the design of the floating trash barrier in hydropower projects.

关 键 词：拦漂排 拦污排 水流力 风荷载 漂浮物荷载 

分 类 号：TV732.2[水利工程—水利水电工程]