Parsons Brinckerhoff/ Hyder JV
At a cost of $1.77 billion, Eastlink is Australia’s
largest road infrastructure project. The road is a
fully electronic toll road using short-range
microwave transponder tags and advanced
video-camera technology. Some 86 road bridges,
five pedestrian overpasses, and 1.6 kilometers of
tunnels are located along the route.
At the outset, the client requested that a full 3D
model be used for construction. Plans were also to
be provided, but would be an aid to the 3D data.
Because the design information could be trans-
ferred directly to the surveyor through digital files,
transmission errors were reduced and intensive
checking was eliminated. The digital files used
were land XML files for the horizontal and vertical
alignments, and 2D
MicroStation geometric files and 3D
MicroStation line-string model files.
This digital data could be transmitted
to the GPS control of the on-site construction graders, where the drivers
were then guided to position the
blades to achieve 3-4 mm construction
tolerance for earthworks.
The use of MicroStation, Bentley
InRoads Storm and Sanitary created
in an integrated 3D environment.
Engineers and drafters were able to
produce the design seamlessly and,
hence, reduce time and effort. The
shared environment between the various disciplines reduced duplication,
and design modifications were quickly
Elevated Six-Lane Highway from km 16. 7 to 19. 7 on NH- 2 (Delhi-Agra Section)
CIVIL ROAD DESIGN
The project comprises consultancy services for
detailed project reports for an elevated, six-lane
highway from Delhi to Haryana, as well as interchanges, a two-lane service road on both sides,
and a pedestrian walkway. The road has five
important junctions and meets about 20 access
roads. The superstructure is three- and four-span
precast segments and will be constructed within a
limited right of way.
The ground triangulation was developed using
MXROAD. The vertical alignment of elevated
highway was proposed within constraints at different sections of the project road. The proposal
involved loop roads crossing each other at different elevations to make the existing junction conflict free.
The ground road vertical alignment was optimized using MXRENEW. The proposed ground
road was combined with the elevated road into a
single design model. The triangulation of design
model was developed with MX.
This complete triangulation was taken in
MicroStation to develop the rendered 3D model
of the project section. The model was enhanced
by adding adjoining structures and obstructions,
and texture maps were used to create a realistic
image of the project. It was then used to create an
AVI for project visualization. The various vehicular
movement at the interchange location could be
clearly explained in the 3D visualization created
from MicroStation. ;