桥梁分布特征对输水渠道过流能力的影响——以南水北调中线工程为例  

Effect to Discharge Capacity of Channel from Bridges Distribution——A Case Study of South-North Water Transfer Midline Project

作　　者：王开[1] 魏加华[1] 张成[1] 王光谦[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《应用基础与工程科学学报》2009年第3期327-334,共8页Journal of Basic Science and Engineering

基　　金：国家自然科学创新研究群体科学基金资助项目(50221903)

摘　　要：长距离输水渠道多个桥梁联合产生的壅水作用对于渠道的输水能力有着重要的影响,是输水工程和交通工程设计中要考虑的重要因素.本文利用南水北调中线电子渠道平台,以南水北调中线工程典型渠段为研究对象,模拟新增桥梁不同间距和阻水面积对总干渠输水能力的影响,得出了桥间距、桥墩阻水面积与渠道水位壅高之间的变化规律,计算得出了对渠道水位壅高影响较小时的适宜的桥梁间距,对南水北调中线工程设计具有参考价值.Backwater effect, which is derived from multi bridges across the channel, could influence the discharge capacity of channel significantly, so it is an important factor in project design of water transfer and shipping transportation. Taking the typical reaches of South-North Water Transfer Midline Project as study object, this paper simulates the effect to the discharge capacity from cases of different distance between bridges and retarding area with Digital Channel Platform of the project. Variation laws of the relations between the raising of water level, the distribution of bridges and the retarding area is calculated. The appropriate distance between bridges, which influences the water level less in channel is proposed to be a reference to project design.

关 键 词：桥梁壅水 桥梁分布 南水北调 数学模型 

分 类 号：TV68[水利工程—水利水电工程]