A First Look at 1000M Construction

12 December 2019

The corrugated metal piping forms that will be installed the length of each caisson, holding the concrete in place as it reaches strength.
The corrugated metal piping forms that will be installed the length of each caisson, holding the concrete in place as it reaches strength.

 

Ever since our Groundbreaking, things have been full steam ahead at 1000M. Construction is officially underway, and to keep everyone in the loop, we sat down with James McHugh Construction Company to understand the nitty gritty details. 

Construction on the site officially mobilized on Monday, December 2, when the team began drilling holes that will be filled by caissons. 

 

Creating the Caissons

Back in July, we broke down the initial process that determines just how deep the drilled caisson holes would need to be. From that initial testing, the construction team determined that the site’s 55 caissons would be cemented 87 feet below ground level. 

As of early December, the construction team has officially reached the targeted 87-foot depth and will begin placing the caissons. Caissons are constructed one at a time by pouring concrete into the drilled holes. Each caisson typically takes around three days to complete. Duplicate that process by 55, and implementing all caissons on the site will occur over the next seven to eight weeks. 

 

Forming the Foundation

Simultaneous with caisson construction, the team is also creating the basement slab foundation for the site. Forming this foundation requires digging approximately 15 feet below ground level across the entire plot where the building will stand. 

Two components of the drill rig that will help to remove soil during the auguring of the caissons.
Two components of the drill rig that will help to remove soil during the auguring of the caissons.

The process of mass excavation for the foundation involves removing the dirt and soil currently there. While doing so, it’s common to come upon what those in construction call “unforeseen obstructions.” On the 1000M site, the team uncovered a few tanks leftover from projects past. Already tested, the tanks have been determined not to contain hazardous materials and will be removed during excavation. 

 

Looking to the Future

Once all 55 caissons are in place and the basement slab foundation has been set, the construction team can move on to installing underground utilities, doing site civil work, grading the ground and pouring the foundation. Currently, the team is typically on-site daily from 7 AM to 3:30 PM. Once construction advances, however, the team will begin working longer hours and working weekends as the project continues to pick up speed. 

Stay tuned on our blog for continued construction updates.