The rebar cage that Slayden/Sundt will use to set the shaft before placing concrete around it. The cage is 220 feet long and weighs approximately 175,000 pounds.
The summer and early fall have been busy for Slayden/Sundt as the joint venture reconstructs the 2,000-foot-long Sellwood Bridge in Portland, Ore. The team has been focused on constructing the in-water piers that will support the three new spans over the Willamette River. Each pier consists of four drilled shafts that are 10 feet in diameter and up to 176 feet below the river bottom (the river is approximately 30 feet deep).
Environmental permitting constraints have left the team with a tight window to complete the drilled shafts and construct/install the perched boxes around the concrete columns. The perched box caissons will allow crews to complete the construction of the piers over the next nine months. They will be installed with cranes and pile drivers above water, and by divers below the water. Building Information Modeling (BIM) is being used to pre-plan the work thoroughly for maximum efficiency and safety.
BIM is being used to plan the construction of the perched box caissons.
The $207 million, heavy civil construction project involves replacing the aging Sellwood Bridge with an open steel deck arch structure. The project team is using an innovative “shoofly” (detour) approach to complete this complex project, which is explained here. This short video shows the successful bridge slide that took place last January.
Sundt employees Fred Stone and Godfrey Linsangan accepted the USACE award on behalf of Sundt. Also pictures are USACE quality assurance personnel.
The U.S. Army Corps of Engineers (USACE) has recognized Sundt with its prestigious Large Contract Safety Award for the first quarter of 2013 in recognition of our safety record at the William Beaumont Army Medical Center project at Fort Bliss in El Paso, Texas. The heavy civil construction project involved preparing the 320-acre site for a future hospital that will serve members of our armed forces.
“This was a very demanding job with a tight, 12-month schedule,” said Sundt Regional Director Fred Stone. “The safety on the project was great; it was our priority from day one. There was a tremendous amount of work going on with some very deep excavations and multiple disciplines of work happening at the same time.”
Sundt’s $47.5 million project included: 600,000 cubic yards of mass grading; 35,000 lineal feet of water line installation; 10,000 lineal feet of storm drain installation; 29,000 cubic yards of concrete paving; 23,000 lineal feet of sewer main installed at depths of up to 50 feet; 1.2 million cubic yards of excavation and backfill just for the sewer main; construction of a precast concrete bridge over an adjacent highway; and construction of an electrical substation.
The completed bridge will include 12 precast concrete arches that rise more than 20 feet above the roadway surface at their highest point. Two of the arches were moved last weekend.
Over the weekend, Sundt moved the first two 300-ton concrete arches that will become part of the reconcstructed West 7th Street Bridge in Fort Worth, Texas. The remaining 10 arches will be moved and set into place, one at one time, between mid-May and mid-June. The $25.9 million bridge construction project involves the replacement of the approximately 100-year-old West 7th Street Bridge with a new signature structure – the world’s first pre-cast network arch bridge. Here’s a short-time lapse video showing one of the arches being moved into place:
Construction of the pre-cast bridge elements – performed by Sundt’s own concrete crews – began in January 2012 at an offsite casting yard. They are being hauled to the project with self-propelled mobile transports and set in place with twin Liebherr 1400 cranes with superlift.
The bridge’s innovative “pre-cast concrete network design” makes it the first of its kind anywhere in the world.
The West 7th Street Bridge boasts an innovative design consisting of 12 lighted, pre-cast, post-tensioned concrete bridge arches that rise more than 20 feet above the roadway surface at their highest point. Each arch measures 163 feet long and weighs 640,000 pounds.
When complete, the bridge will feature four travel lanes with a center raised median to separate traffic. Pedestrians and cyclists will have safer and improved mobility on the reconstructed bridge, which includes separated 10.5-foot pedestrian/bicycle travel ways on the outside of the bridge arches.
The reconstructed West 7th Street Bridge will serve as a landmark gateway connecting the city’s downtown to its Cultural District and the newly renovated Montgomery Plaza area. The project will be complete by Thanksgiving and open to traffic on October 1.
The 1,100-foot-long steel bridge truss was moved last Saturday during a 12-hour operation. It is approximately 25 feet high, weighs about 3,400 tons and had to be moved 33 feet on one end and 66 feet on the other.
If you were anywhere near the Sellwood Bridge in Portland, Ore., last Saturday, you would have seen an amazing sight. A 1,100-foot-section of the existing bridge deck and truss was lifted with hydraulic jacks, moved aside and set onto temporary support piers to make way for construction of a new bridge. The move created what is known as a “shoofly,” or detour bridge, which will keep traffic flowing over the Willamette River as crews build the new structure to take its place.
Reconstruction of the 87-year-old Sellwood Bridge is being performed by Sundt and joint venture partner Slayden Construction. The team’s innovative approach to the project is expected to save about $5 to $10 million in construction costs and cut about a year off the schedule.
Bridge construction is notoriously challenging, but even so, last Saturday’s “bridge slide” was considered a highly complex operation.
“This was one of the longest bridge sections ever to be moved,” said Sundt Area Manager Ted Aadland. “That, plus its age, made it very difficult. The site itself also presents a number of challenges. The project is tightly confined, being sandwiched between the Willamette River, a cemetery and difficult topography. The Slayden/Sundt Joint Venture Team has worked hard to come up with solutions that minimize traffic impacts, and so far I think we’ve been very successful.”
The new West 7th Street Bridge in Fort Worth, Texas will be the only one of its kind in the state.
Developing innovative ways to build complex projects is one of Sundt’s specialties. Case in point: the $24.1 million reconstruction of the West 7th Street Bridge in Fort Worth, Texas, a new landmark gateway between the city’s downtown and new cultural district that will feature two, 10-foot-wide pedestrian walkways and 12 precast concrete and stainless steel arches that run the length of the 980-foot-long structure.
When the first phase of construction begins in January 2012, Sundt will keep the current bridge open and operational while constructing the concrete arches offsite – with its own concrete crews. In the spring of 2013, the precast arches will be placed on both sides of the old bridge at night. Once they’re all in place, the old bridge will be closed and demolished and the new bridge will be built in its place – in just 150 calendar days. Area Manager Chris Cedar calls this phase of the project “tight, but do-able” with lots of manpower and planned overtime shifts. In fact, his aim is to open the new bridge earlier than its scheduled completion date of November 2013.
Using Building Information Modeling, or BIM, will help the team manage the project’s complexities, particularly the construction of the arches, because they contain many structural and lighting elements that have the potential to clash with one another if not planned precisely. BIM is a high-tech replacement for construction drawings on paper. Using multi-dimensional computer models, constructability issues can be identified and resolved before construction begins.
Approximately 300,000 pounds of polished stainless steel within the arches and bridge superstructure will be illuminated at night with embedded lighting, making the West 7th Street Bridge a one-of-a-kind in the state of Texas.