PT Wijaya Karya used Bentley applications on a BIM pilot project for a new Indonesian toll road, reducing the time needed for surveying by 25% and costs by 3% while providing a federated model that can assist with operations
Project: Serpong Balaraja Indonesian Toll Road Project
Location: Tangerang, Banten, Indonesia
Completion: 2021
To improve transportation in Indonesia and support the country’s continued growth, PT Trans Bumi Serbaraja set out to build an IDR 890bn (£49.4m), 39.8km toll road connecting Serpong and Balaraja within the Banten province.
They tasked PT Wijaya Karya with design responsibilities and the design team soon discovered that connecting the two cities, as well as connecting the new Indonesian toll road to existing roads, would require creative planning.
The project included the construction of 10 ramps and a bridge for the various interchanges. The soil composition varied widely along the path, which complicated the earthworks required to stabilise the road. The team quickly determined that traditional design methods would not fully support the development.
Seeking the advantages of BIM design for the new Indonesian toll road
PT Wijaya Karya realised that not only would using BIM applications help them overcome the construction challenges for the toll road, but they could also use it as a pilot to help engineers and stakeholders improve their work within a digital environment. For the pilot to be considered successful, their design workflow needed to improve communication between all stakeholders, streamline the review process, and enhance the design. Additionally, the final 3D model needed to integrate all asset information to support ongoing operations and maintenance. PT Wijaya Karya sought out a suite of BIM solutions that could allow them to meet all the project’s goals.
Going digital to optimise the design of the new Indonesian toll road
After evaluating several options, PT Wijaya Karya determined that they could make the pilot project successful by using Bentley applications. They first established a connected data environment with ProjectWise, which gave stakeholders the confidence that all information is up to date.
Next, they used ContextCapture to process aerial photographs, drone surveys, and geodetic surveys into a reality mesh of the development site. Using OpenBridge, OpenBuildings, OpenRoads and other Bentley applications, they modelled the new roadway and its interchanges within the reality mesh, enabling them to determine how the new road interacts with existing roads.
Lastly, PLAXIS helped them plan all needed earthworks while accounting for the different types of soil compositions.
Reducing resource hours while saving money
Using Bentley applications, PT Wijaya Karya improved visualisation of the site conditions and helped designers perform faster and more accurate soil volume calculations while lowering the amount of resource hours needed. Producing a reality mesh with drones and ContextCapture reduced survey time from four days to one, compared to manual surveys.
Overall, going digital reduced the amount of time for surveying and design by 25%. Optimising the design resulted in reductions in the materials required for the bridge superstructure, the amount of concrete needed, the extent of earthworks and the volume of land to be purchased. All told, these improvements reduced costs by 3%.
Additionally, by going digital, PT Wijaya Karya improved all aspects of the design, established strong coordination among stakeholders, and provided a full set of asset information within a federated model to assist with operations.
Meg Davis
Industry marketing director, roads
Bentley Systems
Tel: +44 (0)808 101 9247
