公路横断面设计中的几何问题研究

发布时间：2018-06-12 01:20

本文选题：公路CAD + 横断面设计　；参考：《华中科技大学》2014年硕士论文

【摘要】：随着国民经济的快速发展，我国公路建设的步伐逐渐加快，公路勘察设计行业取得了欣欣向荣的发展，同时也出现了一些新变化，如设计周期大幅缩短，多条公路相互干涉的情况增多等。现有公路CAD系统在单条设计线的横断面自动设计时有比较成熟的“戴帽子”法，但是在多条设计线相互干涉情况下的横断面设计业界尚无统一可靠的方法，，很难实现并行横断面设计的自动化，极大地影响公路设计的效率；另外，为了更加合理的布置横断面图纸方便施工指导人员浏览查阅，需要在设计图纸输出时进行合理地自动排版。本文针对公路CAD技术的这些需求，对并行横断面设计和横断面出图排版这两个典型的几何问题进行了深入研究。提出了一种针对多条设计线相互干涉情况下的误差一致性并行横断面设计方法，首先在空间中依次计算主设计线所有待计算干涉桩号横断面与次线路基的交点；然后在平面上将次线干涉桩号的横断面与主设计线的交线进行求交计算，以此计算出次线干涉桩号横断面的交点信息；最后根据公共边坡的不同变化策略计算出并行横断面几何形状。提出了一种横断面工程图自动排版技术，突破传统方法根据包围盒来进行排版的限制，充分利用横断面图仅表达公路横断面外轮廓形状，线条数量少，线元类型简单的特点，通过相邻两个横断面图线元求交的方式计算图幅中的每个横断面的几何位置，从而达到布局美观并且节省图纸的良好效果。根据本文论述的两个几何问题成功开发出新一代商用公路CAD系统，已经开始应用于大型公路设计项目，受到了公路勘察设计行业设计人员的广泛好评。
[Abstract]:With the rapid development of the national economy, the pace of highway construction in our country has been quickened gradually, the highway survey and design industry has made a flourishing development, at the same time, some new changes have appeared, for example, the design cycle has been greatly shortened. The number of highways interfering with each other increased, etc. The existing highway CAD system has a mature "hat" method when it comes to the automatic design of a single design line, but there is no uniform and reliable method for cross section design in the case of the interference of multiple design lines. It is difficult to automate parallel cross section design, which greatly affects the efficiency of highway design. Reasonable automatic typesetting is required in the output of the design drawings. This paper aims at these requirements of highway CAD technology, In this paper, two typical geometric problems of parallel cross section design and cross section layout are deeply studied, and a parallel cross section design method for error consistency in the case of interference of multiple design lines is proposed. First of all, the intersection points between the cross section of the interference pile number and the base of the secondary line are calculated in turn in space, and then the intersection line between the cross section of the interference pile number of the subline and the main design line is calculated on the plane. The intersection information of the cross section of the subline interference pile number is calculated. Finally, the geometric shape of the parallel cross section is calculated according to the different changing strategies of the common slope. An automatic typesetting technique for the cross section engineering drawing is proposed. Breaking through the limitation of the traditional method of typesetting according to the bounding box, making full use of the cross section diagram to express only the contour shape of the highway cross section, the number of lines is less, and the line element type is simple. The geometric position of each cross section in the map is calculated by calculating the intersection of the line elements of the adjacent two cross-section maps. According to the two geometric problems discussed in this paper, a new generation of commercial highway CAD system has been successfully developed, which has been applied to large-scale highway design projects. By highway survey and design industry designers widely praised.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U412.33

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