双层平台斜坡式护岸波浪作用的试验研究

发布时间：2018-02-14 23:33

本文关键词： 双层平台斜坡式护岸模型试验波压力波浪爬高　出处：《大连理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：在海岸工程和港口建设中,护岸是重要的水工结构物,其主要作用是抵御潮流和波浪的袭击,防止越浪水量对后方陆域造成危害。护岸堤防工程需确保强度和稳定性达到设计使用要求,堤顶高程也需达到一定的标准及高度,从而控制波浪爬高与越浪对后方陆域的影响,而且还要做到经济可行。本文研究基于某工程双层平台斜坡式护岸结构的物理模型试验。其海床基底高程为-1.67m,水深4.1m-6.6m,在高程为+3.0m的一级平台、+4.5m的二级平台、以及+5.8m高程处分别设置三处同顶高程的胸墙,本文中均分别简称为：1#、2#、3#胸墙。考虑了平台相对宽度B/L、胸墙相对高度A/H、平台相对高程S/d和一、二级平台宽度比值B1/B2等因素对胸墙波压力和平台波浪爬高的影响。并讨论了不同护肩形式对胸墙的波压力的影响,以及一级平台开孔率对一级平台面板浮托力和胸墙波压力的影响。试验研究结果表明,胸墙波压力受平台相对高程影响较明显,在S2/d=0.9～1.2时达到最大值。波浪爬高受相对胸墙高度影响较大和平台相对高程影响较明显。双层网箱护肩相比八字块体护肩更具消能效果,3#胸墙的波浪力降低可40%-50%。随着一级平台开孔率的提高,一级平台面板最大浮托力和胸墙波浪力均得以降低。
[Abstract]:In coastal engineering and port construction, bank revetment is an important hydraulic structure whose main function is to protect against tidal currents and waves. In order to control the influence of wave climbing and surpassing on the rear land area, it is necessary to ensure that the strength and stability of the revetment levee meet the design requirements, and the height of the top of the embankment should reach a certain standard and height, so as to control the influence of wave climbing and surpassing waves on the rear land area. But also to be economically viable. This paper studies the physical model test of slope revetment structure based on a double-deck platform of a certain project. The seabed base height is -1.67 m, the water depth is 4.1m-6.6 m, and the first-grade platform with 3.0m elevation and the second-stage platform with 4.5m elevation is studied. And there are three chest walls with the same top height at 5.8m elevation. In this paper, they are respectively referred to as "1: 1 #q2 #3#" chest wall. The relative width of the platform B / L, the relative height of the chest wall A / H, the relative height of the platform S / / d and one are considered. The influence of the second stage width ratio B1 / B2 on the wave pressure of the chest wall and the wave climb of the platform is discussed, and the influence of different shoulder protection forms on the wave pressure of the chest wall is discussed. And the influence of the opening ratio of the first stage platform on the floatation support force and the wave pressure of the chest wall. The experimental results show that the wave pressure of the chest wall is obviously affected by the relative elevation of the platform. The wave climbing is greatly affected by the relative height of the chest wall and the relative height of the platform. Compared with the octa-block shoulder, the double-layer cage shoulder has more energy dissipation effect and the wave force of the chest wall can be reduced by 40 to 50 with the decrease of the wave force of the wall. The improvement of the opening rate of the first grade platform, The maximum floatation support force and the wave force on the chest wall can be reduced.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P753

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