BIM starts work on world’s longest double-decker bridge
BIM methodologies and technologies have been utilised to design and deliver the world’s longest double-deck bridge, saving considerable time and costs, the company behind the design of the project says.
PT Wijaya Karya (WIKA), an Indonesia-based company that provides construction, mechanical and electrical services to the civil construction company has been contracted to design the £271.6 Design and Build Harbour Road 2 Project in North Jakarta, Indonesia, which is being built with a budget of £271.6 million.
However, very early on, the project team realised that traditional 2D design methods would not help deliver the large and complex 8.95-kilometre toll road development on time and within budget.
“The total volume of the concrete used in this project is a quarter of that of the Giza pyramid,” said Fery Safaria, engineering manager at WIKA. “The total scale of the project is about four times that of Vatican City.”
The project has been developed to create a more efficient way to travel between the cities of Ancol and Pluit, with the existing route a mix of toll roads, interchanges, flyovers, railroads and waterways that frequently suffer severe congestion.
Due to the limited space available, as well as the heavy traffic and numerous intersection points, WIKA has determined that the development needed to include a 3.95 kilometre double-decker bridge along the Ancol River, which will be the longest in the world.
However, the Indonesian government has mandated that the company should avoid placing piers in the water as that could negatively impact the ecosystem and existing river traffic. The project team also must avoid various underground gas pipelines, waterpipes and fibre optic cables, as well as above-ground buildings.
Furthermore, WIKA faces a strict deadline to complete the Harbour Road 2 project before the FIFA 2021 U-20 World Cup which is being held at the nearby Jakarta International Stadium. The new highway is expected to ease traffic to and from the facility.
In addition, the project will improve access to the airport and reclamation islands being developed by the Indonesian government, while it will also greatly improve economic activity and tourism in the area.
In order to design such a complex road system and meet the aggressive schedule, WIKA transitioned from a traditional 2D design method and adopted a 3D BIM methodology. The project team began the conversion with image capture via unmanned arial vehicles, using generalised predictive control to produce a reality mesh within ContextCapture.
The team was able to photograph and process 166 hectares of land within just 15 days, the company adds, roughly six times faster than traditional surveying methods.
Throughout the process, Navigator facilitates communication and collaboration among teams and stakeholders, as well as allowing designers to access running costs and project data from the office, remotely or in the field, WIKA says.
It estimates that by using BIM methodologies, the time needed for communication and inspection was reduced by as much as 30 percent, compared to previously deployed methods.
OpenRoads helps the project team review the alignment of the main road, ramps and approaching structures, while the OpenBridge program allows the team to iterate pier positions and heights, based off real world conditions. Careful pier positioning helps the project team by allowing them to avoid placing them in the river wherever possible, thus lowering the risk of flooding in the surrounding area.
WIKA adds that by using OpenRoads, OpenBridge and gINT, it was able to avoid 1,600 metres of costly waterway foundation works and reduced the design process by 25 days.
Apprenticeships can bridge skills gap says Autodesk director
The UK construction industry needs 216,800 new workers by 2025 to meet rising demand, according to the Construction Skills Network published by CITB.
Even before Covid-19, it was estimated it needs to attract 400,000 new recruits each year to meet the UK’s infrastructure needs.
But given one in three current construction employees are over 50 there is predicted to be a 20-25% decline in the available workforce over the next decade. And with end of the free movement of people from the EU, it has further limited access to skilled talent.
Mike Pettinella, Director, Autodesk Construction Solutions EMEA, believes the solution may be one that is hardly new, but might have taken a back seat during the pandemic.
"Apprenticeships could help us bridge the construction skills gap and meet this rapidly rising demand, and attract a new crop of younger talent to the industry," he said.
"Apprenticeships benefit everyone. For candidates, it’s an opportunity to learn valuable skills without incurring thousands of pounds of student debts. For employers, it’s a chance to train up employees in the competencies that are really needed – combining technical knowledge with collaboration and team work, which are equally important as you enter a new industry. And if you’re a larger company and already required to pay the apprenticeship levy, it makes sense to ensure you’re benefitting from the scheme too."
Marshall Construction recently took on nine new apprenticeships covering various roles. "Some of our previous apprentices have left and started their own businesses, which sets them up for life," said Chairman Robert Marshall. "Most of our current managers came from organic growth within the business whom we have trained to our own standards." Firms such as Barnwood Construction and Keepmoat Homes are also advertising and supporting apprenticeships.
According to the CSN, most English regions will experience an increase in construction workers by 2025, with East Midlands (1.7%) and West Midlands (1.4%) forecast to lead demand. Scotland (1.4%) and Wales (0.7%) are also predicted to fare well. The only region forecast to see a slight decline in workforce is the North East (-0.1%).
Major projects such as HS2 are driving growth in some regions and infrastructure (5.2%) and private housing (6.7%) should see the healthiest pace of expansion by 2025.
The impact of the Fourth Industrial Revolution on the future shape of work will be profound. Modelling by the McKinsey Global Institute on the effects of technology adoption on the UK workforce shows that up to 10 million people, or around 30 percent of all UK workers, may need to transition between occupations or skill levels by 2030.