某工程引水系统引水防沙设计与试验验证  

Design and Experimental Verification of Water and Sand Prevention for a Diversion System Project

作　　者：赵东阳 马振海[1] 尹进步[1] 王国杰[1] ZHAO Dong yang;MA Zhen-hai;YIN Jin-bu;WANG Guo-jie(College of Water Resources and Architectural Engineering,Northwest Agricultural and Forestry University,Yangling 712100,China)

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《水电能源科学》2020年第9期83-86,78,共5页Water Resources and Power

摘　　要：针对原引水系统引水保证率低、防沙能力弱的问题,在已建成的无坝引水系统位于凸岸下端增设拦河闸,设计独特的拦、排沙设施(S型导墙、阶梯式拦沙坎、下宽上窄的弧形冲沙槽)。试验验证表明,拦河闸位置选择合理,泄流和排沙能力强;S型导墙能缩短冲沙前缘长度,束窄河床,抬高水位,提高有压引水口的引水能力;阶梯式拦沙坎满足冲沙比降的要求,提高了进水闸的防沙能力;冲沙槽按"下宽上窄"布置,束窄了冲沙槽上游端水流,从而提高了冲沙槽的流速,其在平面上呈弧形,加强了底流的横向环流作用;冲沙槽中螺旋流的存在,提高了冲沙槽的冲沙能力。The completed dam-free diversion system is located on the convex bank.Through the addition of the dam gate,the unique barrier and sediment-discharging facilities(S-shaped guide wall,stepped sand trap,and narrow curved sand-blown tank)were designed to solve the problem of low water supply guarantee rate and weak sand control ability of the original water diversion system.The test results show that the location of the river gate is basically reasonable;The S-shaped guide wall can shorten the front edge of the sand washing,the high water level of the narrow riverbed,and the application is good in the pressurized water inlet;The stepped sand trap blocks the fine sediment and coarse sediment upstream;Water flow at the upstream end of the narrow front and rear width of the sand blasting tank and the lateral circulation of the underflow in the plane are curved to enhance the flow velocity in the tank;The spiral flow regime in the sand trap of the sand trap ensures the sediment transport capacity.

关 键 词：防沙设计 S形导墙 阶梯式拦沙坎 模型试验 

分 类 号：TV83[水利工程—水利水电工程]