为研究虹吸式管道排沙技术在西霞院水库清淤中的应用及效果, 基于水库库区现场的清淤试验, 利用西霞院 水库上下游水位差的虹吸作用, 辅以破土射流冲吸式吸泥头扰沙, 通过对输沙管道沿程含沙量和流量等特征值的跟 踪监测, 研究单泵及双泵串联条件下, 200 m3 /s、220 m3/ s、230 m3 /s、240 m3 / s、250 m3 /s、300 m3 /s 和 330 m3 /s 共 7 个流量级不同试验工况下测点含沙量的变化范围、趋势及粒径级配等, 并对试验清淤效果进行定量分析。水库清淤 的现场试验结果表明: 随着虹吸式管道排沙试验的工况流量不断增大, 所测的平均含沙量呈现出增大趋势, 而最大 含沙量呈现先增大后减小的趋势, 整个试验过程最大含沙量达到 3421 61 kg/ m3 , 清淤2 000 m3 泥沙的生产成本为 101 56 万元。

In o rder to study the applicat ion and effect o f sipho n2ty pe pipe sediment2discharg ing techno lo g y in dr edging of Xix i2 a yuan reser vo ir in the m iddle r eaches o f t he Yellow River, based o n the o n2site dredg ing test at the r eserv oir, w e utilized t he siphon effect o f the w ater level differ ence betw een the upper and low er reaches o f Xixiayuan Reserv o ir, alo ng w ith so il breaking jetting suctio n dr ag head fo r sediment reg ulat ion. T hr oug h tr acking and m onitoring the characteristic v alues such a s sediment concentra tion and flow r ate alo ng the sediment tr anspo rt pipeline, w e st udied t he sediment co ncentr atio n v ariatio n rang e, tr end, and particle size g r ada tio n at the measured po int under differ ent t est co nditio ns, and ca rried out qua nt itativ e a2 nalysis of the dr edg ing effect in the test . T he r esults show ed that w ith the incr ease o f the flow rate, the aver ag e sedim ent co ncentrat ion w o uld incr ease w hile the max im um sediment co ncent ration w o uld incr ease first and t hen decr ease. The m ax i2 m um sediment co ncent ration thr oug hout the test r eached 3 421 61 kg / m3 . T he pro duct ion co st fo r dr edg ing 2 0 00 m3 sedi2 m ent w as 105 600 yuan.

国家重点研发计划资助项目( 2018YFC0407404) ; 国家自然科学基金( 51609095) ; 黄科院中央级公益性科研院所基金项目( H KY2 JBYW2 2018213)