Maple Leaf Gardens, Toronto
Maple Leaf Gardens is the historic home of the Toronto Maple Leafs hockey team. The building was built in 1931 and is a combination of steel, reinforced concrete and masonry. It is a designated historic structure with a combination of long span steel roof arches, cast in place concrete shear walls, columns and floors along with infill masonry exterior walls. In 2010 the owner decide to do major interior renovations including extensive structural alterations to accommodate the new Owners. Due to the historic value of the structure, the nature of the structural alterations and the proximity of adjacent structures pro-active monitoring of the structure was mandated.
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DeCew Generating Station, St. Catharines
The DeCew Generating Station, in the City of St. Catharines, is a multi level generating station housing two (2) generators, built in the 1960′s with a vertical drop of approximately 250 feet.
The initial excavation into Queenston shale for the powerhouse at the base of the penstocks was larger than the powerhouse building footprint, resulting in the west side of the structure not being bound by the rock escarpment.
The structure has been experiencing movement at the west facade, resulting in wall, floor and foundation cracking, predominantly located at the west side of the building. Ontario Power Generation (OPG) has been monitoring several cracks using numerous plastic crack gauges installed in various areas of the powerhouse. These gauges are visual only and have limited accuracy. It is uncertain if the movement of the powerhouse is continuing or if it has reached a stable state.
To monitor the movement of the structure, a monitoring system was installed within the DeCew Generating Station. This system is set to provide warnings should excessive movements occur. In addition, it has been recording continuously the magnitude of the movement experienced since September 2010.
56 The Esplanade, Toronto
This development consists of a new structure that will include three (3) stories of below grade construction. Due to the proximity of the new construction to the adjacent building, the construction methodology and the proposed depth of the parking garage, there was a potential for the construction activity to have adverse effects on the existing . There were concerns that movement may occur, causing damage to the adjacent building.
A monitoring system was installed on the exterior wall of the existing building to provide warning to minimize the risk of damage and to limit the possibility of disruption to the adjacent structure.
Champlain Bridge, Montreal
The Champlain Bridge is the most traveled bridge in Canada. Since its opening in 1962 the amount of traffic has been continuously increasing. We see a current yearly circulation on the Champlain Bridge of 57.1 million vehicles. It is subject to extreme operating conditions (heavy traffic, high thermal variations, the effects of freezing/thawing, effects of salting during the winter) Mr. Bernard Hodac, CEO of the OSMOS Group, states it represents a challenge similar to the monitoring of the Eiffel Tower.
Henri-Bourassa Overpass, City of Montreal
Built in 1938 and without any documentation, the bridge, as supported by traditional evaluation methods of the time (visual and physico-chemical), had been categorized as not being able to support anything other than passenger vehicles (maximum weight 5 tons). With the expertise of OSMOS Canada an evaluation protocol was established which allowed the structural capacity of the bridge to be increased to 47 tons. As well, a continual monitoring surveillance through OSMOS Canada, eliminates the necessity of personnel currently regulating bridge traffic. There were six police officers working both day and night shifts.
Stukely-South Overpass, Quebec Ministry of Transport
A thick concrete slab bridge at a 54° bias with many cracks, are just some of the complications that make traditional evaluation methods very difficult. According to the elected officials, these factors alone were enough to close the bridge. However, the objective of keeping it open to serve the whole community was a necessity. OSMOS technology intervention, coupled with the bridge engineering experience from Teknika HBA allowed to eliminate the uncertainty of the bridge’s structural integrity and allowed for its reopening in complete safety until the rehabilitation works could be planned and completed.
Coaticook Bridge, Quebec Minstiry of Transport
Crossing the Coaticook River, this steel Pony-Warren type bridge was constructed in 1922. It is an access impossible to circumvent for the downtown area of Coaticook. Six optical strands, a signal and treatment system (SPCU) and two data acquisition units (DAU) assure a continual secure surveillance. With over 200 vehicles per day passing over the bridge, in particular heavy vehicles of several tons, there is no margin for error of the bridge’s integrity and specifically after its heavy usage over the past years. OSMOS expertise assures the bridge’s use for many years to come in complete safety and permits the client’s ability to target the necessary works over time.
Quartier International, William Collector Sewer, City of Montreal
The old William Collector Sewer is a structure classified as an historic monument. The city of Montreal wanted to set up a 1.1 meter fill above the collector, within the framework of refitting Youville Square in Old Montreal. Using OSMOS technology, the works’ integrity can be identified and its weak points noted, permitting the advancements of further works worth several million dollars.
Over 1000 Structures Around The World, Including:
Manhattan Bridge N.Y.
American Express Tower, N.Y.
Kyushu Monorail Bridge, Japan