Putzmeister Pumps Overcome Unusual Jobsite Logistics on Subway Extension Project

Putzmeister America
Created: December 10, 2012

A Toronto subway project challenged the concrete pumping company to pump 65,400 cubic yards of harsh concrete mix and operate under a 100-foot height restriction from a nearby airport

The overall construction process was divided into sections and built in layers rising out of the excavated hole.
The overall construction process was divided into sections and built in layers rising out of the excavated hole.
The Putzmeister 42Z-Meter had a five-section Z-Fold boom that could unfold and operate under the low 100-foot air height restriction required by a nearby airport.
The Putzmeister 42Z-Meter had a five-section Z-Fold boom that could unfold and operate under the low 100-foot air height restriction required by a nearby airport.
On the congested jobsite, the 42Z-meter was set up in a compact space and maneuvered its Z-Fold boom to reach difficult-to-access areas.
On the congested jobsite, the 42Z-meter was set up in a compact space and maneuvered its Z-Fold boom to reach difficult-to-access areas.
Larger sized 52Z- and 63Z-meter boom pumps pumped up to 1,570 cu. yds. of concrete per pour for raft slabs 50 ft. below grade.
Larger sized 52Z- and 63Z-meter boom pumps pumped up to 1,570 cu. yds. of concrete per pour for raft slabs 50 ft. below grade.
The majority of the concrete for the job consists of large 1.5-in. crushed stone with a low water-cement ratio and coarse aggregate, which places great demands on concrete pumps.
The majority of the concrete for the job consists of large 1.5-in. crushed stone with a low water-cement ratio and coarse aggregate, which places great demands on concrete pumps.
Construction of the first station for the Toronto-York Spadina Subway Extension project is advancing quickly with Putzmeister truck-mounted boom pumps placing an extremely harsh mix concrete with...
Construction of the first station for the Toronto-York Spadina Subway Extension project is advancing quickly with Putzmeister truck-mounted boom pumps placing an extremely harsh mix concrete with speed and precision.

"The 42Z has a compact outrigger footprint as well a short stowed length that is about 7 feet shorter than similar model sizes. So we can set up in a really small spot and still have room for ready mix trucks to discharge two at a time," Turney said. “The boom can access difficult-to-reach areas as its five-section Z-Fold configuration allows it to maneuver around obstacles within the structure’s highly detailed design."

The Sheppard West Station has an estimated completion date of April 2014, while the entire TYSSE project is targeted for completion in late 2015.