Dynamic Critical Grading Surfaces Class Summary This demonstration - - PDF document

Dynamic Critical Grading Surfaces

Class Summary

This demonstration will guide the participant through workflows to leverage surface creation tools to develop a dynamic setup surface based on critical criteria parameters. This base surface can then be used to influence the final site design surface model. Basic grading and surface building concepts should be understood. Tools covered in this demonstration will be; alignments, profiles, intersection objects, dynamic featurelines from objects, corridors, grading objects and surfaces.

Le Learn rnin ing Obj bjectives

 Become familiar with a Dynamic Critical Grading Surface concept.  Identify tool options for developing a dynamic critical surface.  Discover ways to use the dynamic critical surface for further site grading development.

Presenter

Eric Gates

ACEC Civil 3D Users ACEC Civil 3D Users ACEC Civil 3D Users ACEC Civil 3D Users Group Group Group Group

Dynamic Critical Grading Surfaces

Eric Gates

Infrastructure applications specialist EnvisionCAD

About the About the About the About the Speaker Speaker Speaker Speaker

• 26 years experience with Autodesk tools.
• Productive with Civil 3D since 2007.
• Methods Development Unit consultant
• Consultant Project Manager; standards

and custom development, and support.

Learning Learning Learning Learning Objectives Objectives Objectives Objectives

• Become familiar with a Dynamic

Critical Grading Surface concept.

• Identify tool options for developing a

dynamic critical surface.

• Discover ways to use the dynamic

critical surface for further site grading development.

Dynamic Critical Grading Surfaces What is the definition of dynamic?

• a force that stimulates change or

progress within a system or process.

• marked by usually continuous and

productive activity or change. Synonym: Influential

When used in the context of site design, dynamic is something like this:

• The force is you.
• You, use the tools to stimulate

productive change within a surface.

• The surface influences the final site

grading design surface.

Dynamic Critical Grading Surfaces

What are critical points for a site grading?

• Points of concern and design criteria.
• They differ with each project.
• Are the essential parameters that guide

the site design.

Dynamic Critical Grading Surfaces

What is meant by a Dynamic Critical Grading Surfaces.

• An essential parameters surface built

to interact with other grading elements to influence the site design.

• It may be helpful to think of this as a

base setup surface used to direct the rest of the site model.

Dynamic Critical Grading Surfaces

This setup surface can be used by other grading tools and surface creation methods as a target to build and refine the final design surface(s). Dynamic Critical Grading Surfaces

What is the surface object?

• Surfaces are represented as a TIN.
• Triangular Irregular Network

Dynamic Critical Grading Surfaces Existing terrain

Tips for creating design surfaces.

• Strive to minimize planar relationships.
• Cultivate the least amount of surface

triangulations.

• Why?

Let’s ask this question again at the end of this presentation. Dynamic Critical Grading Surfaces

Tool options for creating a surface.

What objects can be used to define a surface?

Dynamic Critical Grading Surfaces

• Boundaries
• Breaklines
• Contours
• Drawing Objects

Dynamic Critical Grading Surfaces

Objects that can be used to create a surface.

• Lines & curves, points, blocks, etc.
• 2D and 3D polylines

Graphically editable only. Parameters only available with query tools. No way to define interaction between entities. Dynamic Critical Grading Surfaces

Objects that can be used to creating a surface.

• Feature lines, with definable interaction
• Grading Objects or Feature lines
• Dynamic Feature lines from Corridors
• Corridor point link codes
• Dynamic Feature lines from

alignments/profiles

Interactivity is easily controlled and defined. Multiple edit options including tabular. Dynamic Critical Grading Surfaces

Best objects to use to build a setup surface.

• Feature lines

Why?

• They are the most versatile.

Dynamic Critical Grading Surfaces

There are three basic flavors of feature lines.

• 1. Feature line drawn interactively
• Or by converting a line, arc, polyline.
• Or by offsetting a feature line.

No Dynamic options

Dynamic Critical Grading Surfaces

Three basic flavors of feature lines.

• 2. Feature line from a corridor
• Developed from corridor point codes.

Can be set to be dynamic to the corridor

• r non-dynamic

Dynamic Critical Grading Surfaces

Three basic flavors of feature lines.

• 3. Feature line from an alignment
• Uses design or surface profile for

elevation. Can be set to be dynamic to the alignment or non-dynamic

Dynamic Critical Grading Surfaces

A workflow for building a setup surface.

• 1. Use alignments, profiles and

intersection objects to define the base grading criteria.

• 2. Create dynamic featurelines.
• 3. Build surface from dynamic

featurelines.

Dynamic Critical Grading Surfaces

Review the tool options.

• Use Intersection object to link design

profile PVI. Profile Profile PVI link and lock

Dynamic Critical Grading Surfaces

Review the tool options.

• Create Feature Lines from alignment

2D alignment + 2D profile = 3D feature line

Dynamic Critical Grading Surfaces

Review the tool options.

• Create setup base surface from

dynamic featurelines. Use selection set

Dynamic Critical Grading Surfaces

Create base setup surface as data reference.

• Benefits:
• Facilitates cleaner drawings.
• Can Isolate type of surface parameters.
• Allows for multiple horizontal geometry

layout scenarios.

• Allows for multiple site design grading

refinement scenarios.

Dynamic Critical Grading Surfaces

A workflow for developing a site grading model.

• 1. Paste setup surface as first definition
• f site model surface.
• 2. Convert site plan geometry into

alignments and create surface profiles from setup surface.

• 3. Create dynamic featurelines from
• alignments. Do not add to surface,

keep as reference.

Dynamic Critical Grading Surfaces

A workflow for developing a site grading model.

• 4. Create design profile for a corridor

from the surface profiles.

• 5. Use grading object to define site limit

conditions.

Dynamic Critical Grading Surfaces

Review the tool options.

• Paste surface into another surface.

Dynamic Critical Grading Surfaces

Review the tool options.

• Create dynamic feature lines from

alignments.

• Use the surface profile.

Dynamic Critical Grading Surfaces

Review the tool options.

• Create design profile linked to surface

profiles.

Dynamic Critical Grading Surfaces

Review the tool options.

• Create corridor that targets setup

surface.

Dynamic Critical Grading Surfaces

Review the tool options.

• Create grading object that targets a

surface.

Dynamic Critical Grading Surfaces

Why is it important to:

• Minimize planar relationships?
• Make the least amount of surface

triangles?

Dynamic Critical Grading Surfaces

What did you learn? What did you learn? What did you learn? What did you learn?

• Are you familiar with a Dynamic Critical

Grading Surface concept?

• Can you list some tool options for

developing a dynamic critical surface?

• What are some ways a dynamic critical

surface can be used to assist in the site grading development?

ACEC Civil 3D Users Group ACEC Civil 3D Users Group ACEC Civil 3D Users Group ACEC Civil 3D Users Group

Thank You Questions?

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