抛投防汛石沿坡面滑滚落距影响因素研究  

Study on the Influencing Factors of Drop Distance of Flood Control Stone Sliding and Rolling Along the Slope During Throwing

作　　者：刘滨 杨德生 张淑红 熊长军 倪振强[2] 邴龙 LIU Bin;YANG Desheng;ZHANG Shuhong;XIONG Changjun;NI Zhenqiang;BING Long(Liaocheng Yellow River Bureau,Shandong Yellow River Bureau,Liaocheng 252000,China;School of Architecture and Civil Engineering,Liaocheng University,Liaocheng 252000,China)

机构地区：[1]山东黄河河务局聊城黄河河务局,山东聊城252000 [2]聊城大学建筑工程学院,山东聊城252000

出　　处：《人民黄河》2024年第8期60-64,70,共6页Yellow River

基　　金：山东省自然科学基金面上项目(ZR2022ME165);山东黄河河务局揭榜挂帅项目(鲁黄科技验字[2023]第28号)。

摘　　要：为论证抛投时防汛石沿坡面滑滚的落距影响因素,基于黄河下游顺坝区沿岸坡抛投工况,建立理想情况下日常根石除险加固的抛投防汛石模型,推导考虑流速、水深、河堤坡度、边坡粗糙度的理论公式,通过水槽试验对理论分析结果进行验证比较,找出不同形状防汛石的抛投落距规律。结果表明:水流流速越大,抛投水深越深,河堤坡度越缓,边坡粗糙度越大,则防汛石的落距越大;不同形状的防汛石抛投落距不同,在其他因素相同的情况下,四棱台的落距最小,为最佳形状。利用钢筋混凝土外壳和沙石芯制作大体积新型复合材料防汛石,在黄河下游进行现场抛投试验,其落距与推算结果比较吻合。In order to demonstrate the influencing factors of the throwing distance of flood control stone sliding and rolling along the slope dur-ing throwing,based on the working conditions of throwing along the embankment slope in the lower reaches of the Yellow River,a model of throwing flood control stone for daily root removal and reinforcement under ideal conditions was established.The theoretical formulas consider-ing the current velocity,water depth,embankment slope and slope roughness were derived,and then the theoretical analysis results were ver-ified and compared with the flume test to find out the throwing distance law of different shapes of flood control stones.The results show that the larger the current velocity,the deeper the throwing depth,the slower the slope of the river embankment,the larger the slope roughness and the larger the drop distance of the flood control stone.The different shapes of flood control stones have different drop distances,and in the case of other factors are the same,the four-sided stone block has the smallest drop distance,which is the optimal shape.Using reinforced concrete shell and sandstone core to make a new type of large volume composite flood control stone,the field test is carried out in the lower Yellow River,and the falling distance is in good agreement with the calculated results.

关 键 词：防汛石 落距 水槽试验 黄河下游 

分 类 号：U612[交通运输工程—船舶及航道工程] TV882.1[交通运输工程—船舶与海洋工程]