圆弧型构筑物宗海界址点界定方法探讨——以大连南部沿岸海洋开发活动为例

Study of the method for defining the sea boundary points of Arc-shaped structures-withthe marine development activities of Dalian southern coast asa case

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。

With the coastal engineering design and construction standards progressing and people＇ s requirements for the marine engineering landscape aesthetics growing, this sleek arc Coastal Engineering program has been more and more widely used in practice. Under the existing ＂Specifications for sea area use register investigating＂ requirement, the form of a straight line connecting the two boundary points is the standard method for drawing boundary charts . However, the obtained area is bound to certain bias by ＂straightening＂ describingthe border of these arc structures. How to select the sea boundary points of these structures becomes the key for more accurately and practicallydefin- ingthe projects with the sea . But the models that are used to calculate the number of structures boundary points are fewat present. To solve this problem, this paper screened and defined parametersfrom the drawing technical require-ments, engineering surveying, completion, acceptance and etc.. On this basis, we established a set of models and methods for calculating the sea boundary points of arc structures using Analytical Geometry, and verified the applica bility of the model by the marine development activities of Dalian southern coast as an example .