顺水沉放条件下护底软体排排头漂移距水槽试验研究  

Experimental study on the drift distance of the bottom protection flexible mattress head in the process of downstream sinking

作　　者：杨涵苑 周成洋 夏志康 左利钦[1] 黄廷杰[1] 陆永军[1] YANG Han-yuan;ZHOU Cheng-yang;XIA Zhi-kang;ZUO Li-qin;HUANG Ting-jie;LU Yong-jun(State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing Hydraulic Research Institute,Yangtze Institute for Conservation and Development,Nanjing 210029,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China;The New Huaishu River Management Division of Jiangsu Province,Huai an 223001,China)

机构地区：[1]南京水利科学研究院,水文水资源与水利工程科学国家重点实验室,长江保护与绿色发展研究院,江苏南京210029 [2]武汉大学,水资源与水电工程科学国家重点实验室,湖北武汉430072 [3]江苏省淮沭新河管理处,江苏淮安223001

出　　处：《水运工程》2022年第6期98-105,共8页Port & Waterway Engineering

基　　金：国家自然科学基金资助项目(U2040219);长江航道科技项目(Hs219003)。

摘　　要：航道整治工程软体排沉排过程中,排头着床位置的精准控制是关系施工成败和铺排质量的重要因素。实际施工时对沉排参数的选取大多依赖经验性判断,尚缺乏理论与试验研究。通过概化水槽试验,研究了顺水沉放条件下不同沉排参数对排头漂移距的影响规律,量化表征了各参数的敏感性差异。基于多元非线性回归理论建立了多因素作用下排头漂移距预测模型,利用相关系数和平均绝对误差等指标对其预测精度进行了统计分析。试验结果表明,排头漂移距随排头梁质量和连接绳长增大而减小,随水深和流速增大而增大;各参数敏感性排序为流速>相对绳长>水深>排头梁质量。研究成果可为软体排沉排施工提供科学依据。In the process of flexible mattress sinking in waterway improvement engineering,the precise control of mattress location is an important factor that affects the success and quality of construction.Currently,the selection of sinking parameters mostly depends on empirical judgment because of the lack of theoretical and experimental research.Through the generalized flume experiment,the influence of different parameters on drift distance of mattress head in the process of downstream sinking was studied,and the sensitivity difference of each parameter was quantified.Based on the theory of multivariate nonlinear regression,a prediction model of the drift distance of mattress head under the effect of multiple factors was established,and its prediction accuracy was statistically analyzed by using correlation coefficient,mean absolute percentage error,etc.The experimental results show that the drift distance decreases with the increase of beam weight and rope length,while increases with the increase of water depth and velocity.The sensitivity order of each parameter from largest to smallest is velocity,relative rope length,water depth and beam weight.The study results can provide a scientific basis for the construction of flexible mattress sinking.

关 键 词：软体排 顺水沉放 漂移距 水槽试验 非线性回归 

分 类 号：U617[交通运输工程—船舶及航道工程]