Highway Interchange & Site Grading Civil Engineering Support
Dynamic 3D corridor modeling, earthwork cut/fill volume balancing, and stormwater pipe network drafting in AutoCAD Civil 3D.
Complex Constructability & Coordination Obstacles
A major highway expansion project involved complex topography, multi-lane roadway corridors with variable superelevation, bridge abutment tie-ins, and strict municipal stormwater detention regulations requiring zero net increase in peak runoff.
Key Engineering Responsibilities
- Existing ground (EG) TIN surface generation from point cloud survey
- Horizontal and vertical alignment corridor modeling in Civil 3D
- Dynamic plan-and-profile sheets and cross-section extractions
- Stormwater gravity pipe network and detention pond grading design
Our Technical Engineering Approach
TechSid utilized AutoCAD Civil 3D to create intelligent parametric road corridors linked to profile targets and daylight slopes. We developed automated cut/fill volume comparison surfaces to optimize grading volumes and minimize haulage costs.
Filtering survey point groups, processing breaklines, and generating verified EG TIN surfaces.
Constructing multi-lane road assemblies, variable curb transitions, and daylighting slopes.
Modeling storm sewer pipes, manholes, catch basins, and hydraulic grade lines.
Extracting dynamic station cross-sections and plan-and-profile sheets.
Computing cut/fill earthwork volumes and generating pipe schedule tables.
Final Deliverables Provided
- AutoCAD Civil 3D Dynamic Model (.DWG)
- Full Plan & Profile (P&P) Sheet Series with stationing
- Grading, Drainage, and Utility Layout Drawing Sets
- Earthwork Cut/Fill Volume Verification Report
Project Outcome & Value Delivered
Delivered an accurate civil drawing package with balanced earthwork quantities, accelerating environmental agency review and permit approval.