Presentation on theme: "Roadway Intersection Design In GEOPAK Site Michael Gilham Bentley Civil Michael Gilham Bentley Civil."— Presentation transcript:
Roadway Intersection Design In GEOPAK Site Michael Gilham Bentley Civil Michael Gilham Bentley Civil
Presentation Overview What will we be looking at? We will investigate areas of Roadway design that have traditionally been a challenge with GEOPAK Road tools. At Grade Intersections. Ramp exits Gore Areas Gore pond design
Presentation Overview Why? User requests. Data and concept for this presentation supplied by: Mark Lemieux HNTB
Why use Site Modeler? Amalgamates data from different sources into a single environment. GEOPAK Survey Chain and Profile Alignments Cross Sections Shapes TIN files
Why use Site Modeler? Speed of Design! Every design change is immediately visually displayed for the Designer. The design is dynamic and modifiable. Accuracy. Points are densely and strategically created which provides the Designer with a more complete design.
Where to start? We need to import the known Roadway data into Site Modeler. Existing Surface TIN. Roadway alignments Finished Surface TINs. Specific plan graphics. Edge of pavement Edge of medians etc…
Data Creation Options Create a TIN file from Roadway Cross Sections. GEOPAK provides 2 options to create TIN files directly from the roadway XSs. I.XS Reports>DTM Input II.XS Reports>DTM Prop 3D
Data Creation Options I.XS Reports>DTM Input Produces a DAT file of the Proposed surface.
Data Creation Options II.XS Reports>DTM Prop 3D Produces a DAT file of the combined Proposed and Existing surface.
Data Creation Options 3D Modeling Tools > 3D Cross Sections.
Data Creation Options 3D Modeling Tools > 3D Cross Sections. Draws the combined existing and proposed surface XS into a 3D DGN file. These can then be extracted to a DAT file and Triangulated using the DTM tools.
Data Creation Options Superelevation Tools > Shape to DTM Surface. Produces a DAT file of the Shape surfaces.
Data Creation Options Superelevation Tools > Shape to DTM Surface. Best Option!!!
Data Creation Options Superelevation Tools > Shape to DTM Surface. Make Shapes wider than pavement surface. Either create additional shapes (as shown) or
Data Creation Options Superelevation Tools > Shape to DTM Surface. Make Shapes wider than pavement surface. Either create additional shapes (as shown) or Create a new set of shapes with larger offsets.
Data Creation Options Any of these DAT files can then be either imported directly into Site Modeler… Project>Import>Data>DAT File..or triangulated and imported to Site Modeler. Project>Import>Data>TIN File
How to get the data into Modeler? Project>Import>Data>TIN Import the Existing and Proposed TINs as Objects. Element>New/Edit>Alignments Creates a Site Element from COGO Chain and Profile. Element>New/Edit>Drape Create edge of pavement median elements by draping the MS graphic onto the corresponding TIN Object.
Whats next? Start Modeling! After importing the known data, we will set about creating the unknown data. At Grade Intersections. Gore Area Infield pond design
Whats next? Lets go to the demo……
The Intersection Site Modeler highlights a Design problem. The Profile is 0.4 feet above pavement edge elevation
The Intersection Site Model showing Intersection with original profile.
The Intersection Site Model showing Intersection with amended profile.
The Intersection There was a 0.8 foot difference in the profile elevation at the other intersecting road!
The Intersection Completed! Ready to cut XSs, create Plan view stakeout drawing or Export to COGO for survey stakeout.
The Gore Area Site Modeler has highlighted a Shape problem.