Preparation of DPR for 4/6 Laning Itanagar- Halem NH-52/52A
Wilbur Smith Associates Pvt., Ltd.
NH- 52 and NH-52A, which stretch from Itanagar
in Arunachal Pradesh to Halem in Assam, are two
national highways in India of about 92 kilome-
ters. Especially challenging for the highway
upgrade is the difficult terrain of NH-52/52A,
including bypass alignment through inaccessible
hills of the Itanagar mountains and providing sta-
bility to the innate geological and geomorpholog-
ic characteristics of hills along NH 52A. The vari-
ous alternatives put forward by the consultants
needed to be scrutinized with respect to the best
engineering solution, cost, social and resettle-
ment, and environmental issues—since all of
Arunachal Pradesh is reserve forest, with some
part demarcated as wildlife sanctuary.
Wilbur Smith Associates used a mix of tools developed by its engineers, along with MXROAD features to find solutions for the very complicated
overlay design of this four-lane road project. The
company used MXROAD’s string-based concept and template system
and input files in customizing their
design tools. ;
The Hollansch Diep Sediment Storage Facility
Grontmij Nederland bv
The project involves the digital modeling and construction of a facility to store contaminated
dredged sediment from the Hollandsch Diep,
Biesbosch, and Haringvliet estuaries. It will have
a capacity of 10 million cubic meters and be constructed within the estuary by excavating a pit to
a depth of roughly 40 meters below the river bed.
It will be 1.2 kilometers long and 500 meters
wide at water level, and excavated material will
form a dyke to surround the pit.
Grontmij Nederland built a 3D string model using
Bentley software to see how the whole design
fits together and to check for inconsistencies.
Without a 3D model, it would have had to work
with 2D images and then try to conceptualize in
With the 3D model, the firm checked for conflicts
and clearances between various surfaces. It could
also extract volume information and generate
impressive visualizations. These visualizations not
only helped it further check the design, but were
also an invaluable tool for explaining the design
to the public.
CIVIL SITE DESIGN
The firm built the MX string model using the MX
command language with the commands grouped
together in an input file for processing. The input
files provided an audit trail of the design. ;