三峡库区滑坡涌浪对趸船撞击力的影响  

Effects of Landslide Surge on Impact Force of Pontoonin theThree Gorges Reservoir Area

作　　者：徐晓菲 王平义[1] XU Xiao-fei;WANG Ping-yi(School of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学河海学院,重庆400074

出　　处：《科学技术与工程》2020年第17期7093-7100,共8页Science Technology and Engineering

基　　金：重庆市基础研究与前沿探索重点专项(cstc2017jcyjBX0070);山区公路水运交通地质减灾重庆市高校市级重点实验室开放基金(kfxm2018-15);重庆市研究生科研创新项目(2018B0106)。

摘　　要：为研究滑坡涌浪对趸船撞击力的影响规律,通过水槽物理模型试验的方法研究了三峡库区滑坡涌浪对趸船撞击力的影响因素及影响程度。按1∶70几何比尺,对三峡库区某河段、滑坡体、斜坡式码头、趸船及船舶进行模拟。探究趸船撞击力随不同方量滑坡体、同方量不同截面形态滑坡体、不同河道水深、初始波高或周期等众多因素的变化规律。研究结果表明:趸船撞击力随滑坡体方量的增加而增大,并且同方量不同截面形态的滑坡体影响趸船撞击力的历时变化。而河道水深变化对于趸船撞击力的影响程度并不大,且正常蓄水位对力有一部分削减作用,相比较汛期防洪限制水位与枯水期消落水位对趸船的撞击力的影响更大。趸船撞击力随初始波高及周期的变化呈现跌宕起伏的波动变化,不同时间段变化趋势有所不同。除此之外,试验发现靠泊船舶与趸船两者撞击力最大值出现的时间同步,船舶撞击力也是影响趸船撞击力的一大因素。最终可根据对以上影响因素进行归纳,并通过多元回归分析得到靠泊船舶撞击力和趸船撞击力的计算公式。为今后预估滑坡体发生坍塌时,斜坡式码头稳定性受趸船撞击力的影响程度提供参考。The factors influencing the impact force of the pontoon caused by landslide surge in Three Gorges Reservoir area and the degree of impact were observed by physical model test of the water tank.According to 1∶70 geometric scale,a river section,landslide body,ramp wharf pontoon and ship in Three Gorges Reservoir area were simulated.The research was aim to explore the variation law of pontoon impact force with various factors such as landslide body with different volume,landslide body with different section of the same volume,water depth of different river channel,initial wave height or period and so on.The results show that the impact force of the pontoon increases with the increase of the slope mass,and different sections of the same slope mass affect the duration of the impact force of the barge.The impact force of the pontoon is not greatly affected by the change of water depth of the river,and the normal water level has a certain reduction effect on the impact force of the pontoon.Compared with the flood control limit level in the next flood season and the flood level in the dry season,the impact force of the pontoon is great.The impact force of the pontoon varies with the initial wave height and the wave period,and the variation trend is different in different periods with fluctuation.In addition,it is found that the maximum impact force of both the ship and the pontoon occurs at the same time,and the impact force of the ship is also a major factor affecting the impact force of the pontoon.Finally,based on the above factors,the calculation formulas of the impact force of the ship and the pontoon are obtained through multiple regression analysis.It can be used as a reference for predicting the degree to which the stability of the sloping wharf is affected by the impact force of the pontoon when the landslide body collapses in the future.

关 键 词：水利工程 滑坡涌浪 物理模型试验 回归分析 斜坡式码头 趸船 撞击力 

分 类 号：U656[交通运输工程—港口、海岸及近海工程]