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伴随着海岸工程设计、施工水平的不断进步和人们对海洋工程景观美学要求的日益提高,圆弧型海岸工程方案已经越来越广泛的应用于实践中。按照现行《海籍调查规范》要求,以直线形式连接两界址点是宗海图绘制的标准方法,然而“截弯取直”来描述这些圆弧型构筑物边界,面积势必会存在一定偏差,如何选取此类构筑物宗海界址点,成为能否更准确、实用的界定项目用海的关键。可是目前能够用来计算圆弧型构筑物界址点数量的模型却很少。针对此问题,本文从绘图技术要求、工程测量、竣工验收等多方面筛选和确定界定参数,在此基础上,应用解析几何法建立一套圆弧型构筑物宗海界址点数的计算模型和方法,并以大连南部沿岸海洋开发活动为例验证该模型的适用性。
Accompanied with the continuous improvement of coastal engineering design and construction level and the ever-increasing demands of people for the aesthetics of marine engineering landscape, the circular coastal engineering program has been more and more widely applied in practice. According to the current “Norms for Investigation of Maritime Surnames”, connecting two boundary points in a straight line is the standard method of sea chart drawing. However, the area of these circular arc structures is bound to be certain Deviation, how to choose such structures Zonghai boundary points, become the key to more accurate and practical use of the sea to define the project. However, there are very few models that can be used to calculate the number of boundary points of arc structures at present. To solve this problem, this paper selects and determines the definition parameters from the aspects of drawing technical requirements, engineering measurement, completion acceptance, etc. Based on this, the paper establishes a set of calculation models and methods for calculating the number of boundary points in the arc-type structures using analytic geometry , And take the marine development activities in southern Dalian as an example to verify the applicability of this model.