Unit 5 – Lesson 2: Profiles Civil 3D 2010 Student Workbook ▪ 1 Roadway Profiles Overview In this lesson, you learn to create surface profiles and profile views. Surface profiles are created for alignments and typically show the nature of the existing terrain along the alignment. Profile views are the grid objects that show surface profile and other types of profile data. Surface profiles are dynamic objects that automatically update if either the horizontal alignment geometry changes or the surface changes. This makes it very easy to adjust the horizontal alignment to best match the existing terrain. A profile view with a surface profile is shown in the following illustration. Profile view Surface Profile Lesson 2 AutoCAD Civil 3D 2010 Education Curriculum Student Workbook Unit 5: Land DevelopmentUnit 5 – Lesson 2: Profiles Civil 3D 2010 Student Workbook ▪ 2 After the designer creates a surface profile, the next step in the road design process is to create a layout profile. The layout profile represents the design profiles and consists of tangents and vertical curves. You create layout profiles by using commands on the Profile Layout Tools toolbar. You can edit layout profiles graphically, using the table in Panorama, or by using profile creation tools on the Profile Layout Tools toolbar. Objectives After completing this lesson, you will be able to: - Create a profile from a surface and create a profile view. - Create a layout profile. - Edit a layout profile using graphical and tabular methods. - Label profiles and profile views. Exercises The following exercises are provided in a step by step format in this lesson: 1. Create a Surface Profile and a Profile View 2. Create a Layout Profile 3. Edit Profile Geometry 4. Label Profiles and Profile Views About Surface Profiles Surface profiles are objects used to represent terrain data along a horizontal alignment. Surface profiles are displayed in profile views. After you create an alignment, the next step in the road design process is to generate the surface profile. The surface profile helps the designer determine the layout of the design profile. In many instances, engineers strive to design road profiles to match the surface profiles as closely as possible to minimize the amount of earthwork on a project. Surface profiles are dynamic profiles and automatically update when you edit the alignment geometry or station data, or change the surface.Unit 5 – Lesson 2: Profiles Civil 3D 2010 Student Workbook ▪ 3 Data Points Surface profile data points are generated wherever the alignment intersects a TIN line. The following illustration shows the locations where the data points are sampled when a surface profile is created for an edge of pavement alignment. Profile Editor Profile data is displayed in the Profile Editor. The surface profile data station and elevation pairs are shown in the following illustration. These are the locations where the alignment intersects a surface triangulation line. The following illustration shows a surface profile with an existing elevation change from west to east along the centerline of an alignment. About Profile Views A profile view is a graph that includes a grid, X and Y axes, and data bands that displays profile view data. The X axis represents horizontal distance along the selected horizontal alignment orUnit 5 – Lesson 2: Profiles Civil 3D 2010 Student Workbook ▪ 4 other linear feature. The Y axis represents elevations. You can configure data bands to contain annotations such as elevation data, stations, and cut/fill depths. Y axis X axis Data bands You control the appearance of a profile view using profile view styles. The profile view style also controls the following: Vertical exaggeration of the profile view object. Major and minor grid spacing. Axes labeling. Profile view title annotation. Colors, linetypes, and lineweights of profile view components.Unit 5 – Lesson 2: Profiles Civil 3D 2010 Student Workbook ▪ 5 You can customize the components and appearance of the graph. You can change the display elements of a profile view such as title format, axis annotation, and grid appearance. You can set the view to clip grid lines above the profile line or to hide grid lines. Examples In the first illustration, notice that the surface profile is at a significant grade. The profile view style shows the profile data at a 10:1 vertical exaggeration. This may result in difficulties fitting the profile data in the profile portion of a plan and profile construction drawing. For steep terrain, a 10:1 vertically exaggerated profile view does not show the entire profile within a paper space viewport. To address this issue, the designer creates and assigns a profile view style that reduces the vertical exaggeration to 5:1. The profile view with the new profile style assigned is shown in the second illustration. Profile view with 10:1 vertical exaggeration Profile view with 5:1 vertical exaggeration Keep the following guidelines in mind when creating profiles: For surface profiles to be accurate, you must ensure that the surface is accurate. This means using breaklines and excluding points that do not represent the lay of the land from the surface. When you move the profile view, profile data in the profile view moves with the profile view.Unit 5 – Lesson 2: Profiles Civil 3D 2010 Student Workbook ▪ 6 If you change the vertical exaggeration of a profile view by assigning a new profile view style, profile data in the profile view updates accordingly. About Layout Profiles Layout profiles represent the finished vertical alignment that final road construction and grading is based on. The layout profile is also known as the vertical alignment or design profile and consists of tangents and vertical curves. After you create and display the surface profile in the profile view, you then create the layout profile, which represents the design of the vertical alignment for the road. Unlike dynamic surface profiles, layout profiles are static and do not update with changes to the alignment. You can create layout profile geometry by converting existing AutoCAD® lines and splines. You can also create layout profiles by inputting stations, elevations, and vertical curve data in a tabular editor. There are a number of useful commands available on the Profile
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