【作者】 张志波；

【导师】 孙昭晨； 梁书秀；

【作者基本信息】 大连理工大学 ， 港口海岸及近海工程， 2013， 硕士

【摘要】 锦州大笔架山岛北侧发育一条连接海岛与大陆的连岛沙坝。它是世界上少数的完整地保留了原生态地貌特征、典型的连岛沙坝,在世界同类地貌景观中具有无可比拟的地位,已经接近或者达到世界遗产的水平。然而近年来随着海域附近海岸工程的建设,笔架山水域海洋动力场发生根本性改变,连岛沙坝受到来自偏东向波浪的不断侵蚀,出现四条潮水沟,严重的改变了连岛沙坝的地貌形态,极大了削减了它的魅力。本文首先介绍了笔架山连岛沙坝相关研究的背景和意义,国内外学者在连岛沙坝研究方面的理论分析、物理模型实验相关研究以及研究进展状况和发展趋势。总结了连岛沙坝的形成的规律。针对笔架山连岛沙坝的侵蚀状况,是由于维系连岛沙坝平衡的海洋动力条件改变所导致,因此本文主要从水动力学的角度研究连岛沙坝的侵蚀原因。因此,在总结前人在笔架山连岛沙坝的研究成果的基础上,本文对笔架山连岛沙坝的成因做了综合分析,并且对笔架山水域的概况、冲淤环境及水动力特征做了阐述,对比了锦州港建设前后连岛沙坝的形态演变以及笔架山水域波浪及潮流的变化,分析了连岛沙坝的破坏机理,并通过整体以及断面物理模型实验验证了理论分析的结果。在无法恢复水动力平衡的条件下,修复连岛沙坝形态并使其保持稳定的根本措施是降低东侧的水动力条件对其的侵蚀作用。本文采用潜堤作为修复连岛沙坝的措施,提出二种潜堤的布置方案,并通过物理模型实验验证了修复措施的有效性。更多还原

【Abstract】 It develops a tombolo connecting the island with the mainland on the northside of Jinzhou Bijia-mount island. It is one of few tombolos that retained the original eco-geomorphological features completed in the world, it has an unparalleled position in similar landscapes in the world, it has been chose to or reached the level of the World Heritage. However, with the construction of coastal engineering near the sea areas in recent years, Marine dynamic field in Bijia-mout waters has changed fundamentally. Tombolo has been eroded by waves from east, four tidal ditches have been appeared, it changed the morphology of tombolo seriously and reduced its charm enormously.Firstly, this paper introduces the background and significance of research about Bijia-mount tombolo, as well as the recent development and progress in the research about tombolo by the domestic and foreign scholars including theory analysis, physical model experiment. It summarizes the rule of formation about tombolo. On account of the erosion status for Bijia-mount tombolo, it is caused by the change of marine dynamic conditions that sustain the balance of tombolo, so this paper mainly studied the cause of erosion for tombolo from the point view of the hydrodynamic.Therefore, on the basis of summing up the results of previous research on Bijia-mount tombolo, this paper made a comprehensive analysis on the formation of Bijia-mout tombolo, it made a overview of situation about Bijia-mout waters and describtion about the erosion and deposition environment and hydrodynamic characteristics in detail, it compared the morphological evolution of tombolo before and after the the construction of Jinzhou Port as well as the change of wave and tide in Bijia-mout waters, it made a analysis on the erosion mechanism of tombolo, and verified the results of theoretical analysis by integral physical model test and cross-sectional physical model test.Under the condition of not be able to restore the balance of hydrodynamic, the fundamental measures that repair the form of tombolo and keep it stable is to reduce hydrodynamic conditions on the east for the erosion. We used submerged breakwater as measures for repairing tombolo, and proposed two layout programs about submerged breakwater, we verified the effectiveness of the measures for repair by physical model test.更多还原