NOTES Module 17 Roadway Cross Sections and Quantities In this module, you learn how to work with roadway cross sections and quantities in AutoCAD Civil 3D. Objectives After completing this module, you will be able to: Create cross section sample lines. Create cross section views. Calculate earthworks and pavement structure quantities. Create quantity reports. Modify the sample line group properties. Create construction staking data.AutoCAD Civil 3D 2009 Education Curriculum NOTES 17-2 Notes to Instructor Data for this module resides in the \AutoCAD Civil 3D 2009 Education Curriculum\Module 17 - Roadway Cross Sections and Quantities\ folder. Exercises The following exercises are provided in step-by-step format. Open the AutoCAD Civil 3D program prior to beginning the lesson by double-clicking the Civil 3D icon on the desktop. For those working in the imperial system use the drawing files beginning with the letter I. Those working in the metric system should use the drawing files beginning with the letter M. You are provided with a drawing for each exercise in the lesson. You are required to open the drawing provided with the exercise. The exercises in this module are as follows: 1. Create Sample Lines 2. Create Section Views 3. Calculate Earthworks and Pavement Structure Quantities 4. Create Quantity Reports 5. Modify the Sample Line Group Properties 6. Create Construction Staking DataModule 17 - Roadway Cross Sections and Quantities NOTES 17-3 Roadway Cross Sections and Quantities Roadway cross sections and quantities are generated from sample lines. Sample lines are drawn in plan view at a specified interval along an alignment. When you create the sample lines, you specify the width of the sample lines and the section data to be attached to the sample lines. The section data attached to sample lines is used to calculate quantities and display in the section views. You can attach the following types of section data to the sample lines: Surface section data Corridor surface section data Corridor section data Material section data Pipe network section data Sample lines and section data are collected in a sample line group under the Alignment tree on the Prospector tab of the Toolspace window.AutoCAD Civil 3D 2009 Education Curriculum NOTES 17-4 Once you have created the sample lines, you then create the section views. The section view is the grid object that displays the section data. The following illustration shows a section view with existing ground surface section data, corridor datum surface section, and corridor section data. The orientation of the section views in the drawing is controlled with a group plot style. You can use a group plot style to show the section views in a page layout.Module 17 - Roadway Cross Sections and Quantities NOTES 17-5 format. The annotation of corridor section data in the section views is controlled with the Code Set Style, which is a collection of marker styles, link styles, shape styles, and label styles that is applied to corridor section data. You can also calculate quantities from the sample lines. Quantity calculation is based on quantity takeoff criteria, which determines how the quantities are to be calculated. The following illustration shows quantity takeoff criteria that can be used to calculate earth cut and fill quantities.AutoCAD Civil 3D 2009 Education Curriculum NOTES 17-6 Earth cut is the area below the existing ground surface (EG) and above the corridor datum surface. Earth fill is the area above the EG and below the corridor datum. When you compute the material volumes, you match the object name in the drawing with the name in the quantity takeoff criteria. This means that you can predefine quantity takeoff criteria in a drawing template (DWT) that can be applied to different projects. When you calculate quantities, a material list is created and added to the sample line group.Module 17 - Roadway Cross Sections and Quantities NOTES 17-7 Material shape data is also added to the sample line group. This enables you to apply shape styles to specific materials in the section views to make them easily visible. After the quantities have been calculated, you can create reports in XML format that can be viewed with any web browser. You can also create dynamic reports in the drawing, that automatically update when the corridor model changes. To create a report, you first select a material list. You then specify the style sheet to control the formatting of the report. Different style sheets are used for different types of quantity reports.AutoCAD Civil 3D 2009 Education Curriculum NOTES 17-8 The quantity reports are then displayed in a web browser. You can also create a dynamic table in the drawing that shows quantities. You can perform a number of operations when you modify the properties of a sample line group. One important operation is to add or remove cross-section data from the sample lines.Module 17 - Roadway Cross Sections and Quantities NOTES 17-9 You can also change the width of the sample lines in the sample line group. You can remove the section views from the drawing. Section views are often created in a separate drawing that externally references the drawing with the corridor and surface data.AutoCAD Civil 3D 2009 Education Curriculum NOTES 17-10 Construction staking data can also be generated from a corridor model in AutoCAD Civil 3D. You can create construction staking points from the Corridor Daylight feature lines. The points are organized in a point group and created in the drawing.Module 17 - Roadway Cross Sections and Quantities NOTES 17-11 The points can then be exported to a text file, which can be uploaded to a Total Station / GPS survey instrument for construction staking. Finally, you export the proposed corridor datum surface to a Land XML file. This can be uploaded to Total Station / GPS survey equipment or used with machined controlled grading for construction.AutoCAD Civil 3D 2009 Education Curriculum NOTES 17-12 Key Terms Code Set Style Used to control the display of points, links, and shapes in an assembly, corridor, or corridor section data that is displayed in a section view. Can also be used to annotate corridor section data in section views and when you view/edit corridor sections. Construction Staking Data Data extracted from a Civil 3D
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