摘要
河道水面线计算是河道治理工程规划设计的主要内容之一,水面线计算的精度直接影响工程安全和设计质量。天然河道水面线计算通常是通过求解天然河道水面线方程得到。水面线方程虽然简单,但方程中各水力要素相互影响、相互制约,特别是天然河道复式断面,由于断面形态复杂,河道纵坡沿程变化较大,缓流、急流转换十分常见,在河道水面线计算时往往会出现在某些断面水面线计算不收敛,或水位计算不合理的情况。结合工程实践及水面线算法设计经验,总结水面线方程求解过程中的关键环节,提出改进一维天然河道水面线方程敛散性的方法和思路,经实践检验,取得较好的效果。
The calculation of rivers water surface profile is one of the main contents of the design of river regulation projects.The accuracy of water surface profile calculation directly affects the safety and design quality of engineering.The design water surface profile of natural rivers is usually obtained by solving the water surface profile equation.Although the water surface profile equation is simple,the hydraulic elements in the equation affect and restrict each other.The compound section shape of natural river is complex,the longitudinal slope of the river varies greatly along the way,the calculation of the water surface profile will not converge,or be unreasonable.Based on my own engineering practice and and water surface profile algorithm experience,this paper summarizes the key links in the process of solving the water surface profile equation,and puts forward methods and ideas to improve the convergence and divergence of one-dimensional natural rivers water surface profile equation.Through practice,it has achieved good results.
作者
许梦璇
马振梅
高振宇
XU Mengxuan;MA Zhenmei;GAO Zhenyu(Beijing Municipal Engineering Consulting Co.Ltd,Beijing 100025,China)
出处
《水科学与工程技术》
2024年第4期29-33,共5页
Water Sciences and Engineering Technology
关键词
天然河道水面线方程
敛散性
water surface profile equation of natural rivers
convergence and divergence
