单戗立堵截流水力要素的恒定流推求方法  

Determination of Hydraulic Parameters for Single-bank Vertical Closure based on Constant Flow Calculation

作　　者：胡诗言 刘全[1] 田福文[2] 张宏阳 张小蕾 HU Shiyan;LIU Quan;TIAN Fuwen;ZHANG Hongyang;ZHANG Xiaolei(State Key Laboratory of Water Resources Engineering and Management,Wuhan University,Wuhan 430072,China;Sinohydro Engineering Bureau 8 Co.,Ltd.,Changsha 410007,China)

机构地区：[1]武汉大学水资源工程与调度全国重点实验室,湖北武汉430072 [2]中国水利水电第八工程局有限公司,湖南长沙410007

出　　处：《水电与新能源》2025年第3期14-18,共5页Hydropower and New Energy

基　　金：国家自然科学基金面上项目(51879147)。

摘　　要：截流是水利水电工程建设的重要步骤,计算截流水力参数是施工设计不可或缺的内容。在大比降高落差河流,经典截流水力计算的龙口落差包括上游水尺与下游水尺的水面高差,与实际情况差异大。为此,提出了基于恒定流计算的截流水力计算方法,以单戗立堵双向进占、单隧洞分流为例,从下游起选取多个计算断面,逐段向上游计算断面水位,根据计算结果修正假定上游水位,重复计算直至收敛,得到截流过程中的河道水面线,并计算得到截流龙口水力参数。编程实现该算法,并通过了案例验证。River closure is an important step in the construction of water conservancy and hydropower projects.Determination of hydraulic parameters of the closure work is an indispensable part of the construction design.In rivers with large drop heights,the water level drop calculated by classical hydraulic calculation of closure work includes the water surface height difference between the upstream water gauge and the downstream water gauge,which is rather different from the actual situation.Thus,a hydraulic parameter calculation method for river closure based on constant flow calculation is proposed.Taking the single-bank end-dumping bi-directional advancing closure with single-tunnel diversion as an example,several calculation sections are selected from the downstream,and the water level of each section is calculated one by one to the upstream.The assumed upstream water level is corrected based on the calculation results and the process is repeated until convergence.The water surface profile of the river channel during the closure process and the hydraulic parameters are then obtained.Calculation codes of the proposed algorithm is ready and validated through case studies.

关 键 词：水电工程 截流水力参数 河道水面线 恒定流推算 

分 类 号：TV551.2[水利工程—水利水电工程]