Erdman Anthony was asked to prepare a 3-D surface model suitable for Automated
Machine Guidance (AMG) for construction of the new roadway alignments and
drainage features associated with the replacement of the bridge over Sandy Creek
in Adams, New York.
The proposed centerline alignment, profile, and
design cross sections contained in the original 2-D CADD files became the basis
for the new 3-D model. In order to create this complex roadway model, a series
of design templates were generated to accommodate the variable roadway widths,
transitions, and areas of super-elevation within the design corridor. Utilizing
these design templates, surface models were generated for all phases of roadway
construction (rough grade, sub-grade, and final grade).
generated 3-D design data was then merged with a surface model of the existing
site conditions to create a final model of the overall site suitable for
construction and volumetric analysis. Reports and cross sections were generated
based on the new design model to ensure full compliance with the design
specifications. The deliverables for this project included a surface model
formatted for the contractor’s AMG equipment, a CADD file containing 3-D
polylines of the design corridor, and a point file for layout of proposed
features not suitable for AMG.