Boring machines called in for $3.3bn Virginia infrastructure project
The Virginia Department of Transportation (VDOT) has called in bored-tunnel construction machines to deliver the next phase of its $3.3bn Hampton Roads Bridge-Tunnel (HRBT) Expansion project.
This week both competing teams-Hampton Roads Capacity Constructors and Hampton Roads Connector Partners notified VDOT they selected the bored-tunnel method as the basis for their bid proposals, which will be submitted in late 2018.
“The selection of a bored tunnel means Hampton Roads will see some of the world’s most sophisticated tunnel technology at work. Once complete, this new crossing will greatly improve accessibility, transit, emergency evacuation, and military and goods movement along the I-64 corridor,” said VDOT Commissioner Stephen Brich.
Although the immersed-tube method was used to construct all ten of Hampton Roads’ existing crossings – from the original Downtown Tunnel in 1952 to the new Midtown Tunnel in 2016 – recent technology advances have now made bored tunnels feasible in the region’s soft soils.
The Parallel Thimble Shoal Tunnel, currently under construction at the Chesapeake Bay Bridge-Tunnel, is also being built as a bored tunnel for the Chesapeake Bay Bridge-Tunnel Commission.
This technology involves a massive tunnel-boring machine, or TBM, with a rotating cutting head that excavates soil along the tunnel’s path.
Advantages of this construction method include significantly less environmental impact to marine wildlife than with the immersed-tube approach, which would have required dredging a deep, mile-long trench across the Hampton Roads waterway.
In addition, because the tunnel-boring machine excavates from beneath the riverbed, this technology greatly reduces disruption to commercial and military shipping in one of the nation’s most important navigation channels.
The project represents VDOT’s first bored tunnel. In addition to HRBT and the Thimble Shoal project, other bored roadway tunnels in the United States include the Port of Miami Tunnel and the Alaskan Way Viaduct Replacement in Seattle, Washington.
The HRBT Expansion project will build a new bridge-tunnel adjacent to the existing HRBT and widen the four-lane segments of I-64 in Hampton and Norfolk to ease daily congestion between the Peninsula and South Hampton Roads.
The project cost is estimated between $3.3 and $3.8 billion, with contract award expected in early 2019. The majority of project funding will be provided by the Hampton Roads Transportation Accountability Commission, with federal support and other public resources anticipated.
217,000 extra workers needed to meet COVID-19 recovery
As the construction industry’s recovery progresses, the Construction Industry Training Board’s (CITB) Construction Skills Network (CSN) forecasts have led the organisation to believe the industry will reach 2019 levels of output in 2022.
The CSN says there will be an increase in the number of construction workers in “most English regions” by 2025, with demands forecasted at a 1.7% rise for the East Midlands, and a 1.4% rise for the West Midlands.
Scotland and Wales are also predicted to see a surge in demand for construction workers with a total increase of 1.4% and 0.7% respectively. The North East is the only region to see a slight decline in workforce demand at -0.1%.
Wood and interior fit-out trades among the most desirable during COVID-19
According to CSN’s forecast, the trades that are the most wanted are those of wood and interior fit-outs, with both requiring around 5,500 workers per year. Other in-demand trades include technical staff and other construction professionals, requiring 5,150 workers each year, construction managers at 3,600, and the electrical installation trade, which requires 3,400 staff per year.
There is also expected to be demand for 7,850 non-construction, office-based professionals and technical and IT support staff each year. Steve Radley, Policy Director at CITB, said: “It’s great to see construction coming back so strongly and creating lots of job opportunities.
“We need to adopt new approaches to meet these growing skills needs and deliver these quickly. We are working closely with the government and FE to build better bridges between FE and work and make apprenticeships more flexible. We are also making significant investments in supporting work experience that make it easier for employers to bring in new blood.
“We must also make sure that we invest in the skills that will drive change and meet new and growing needs such as Net Zero emissions and Building Safety. We will be announcing plans soon to tackle specific skills and occupations such as leadership and management, digital skills, and skills related to energy efficiency”, he said.