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Southwest Contracting Ltd.
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Ruskin Dam Generating Station - Intake Anchors

As part of the BC Hydro - Ruskin Dam and Powerhouse Upgrade Project, SWC undertook the installation of 16 rock anchors for intakes 1 and 2. The anchors were designed to increase the structural stability of the existing intakes, such that they can resist sliding and toppling movements during a seismic event.

The anchors had to be drilled through the existing deck, through water, and to the bedrock. Contact pipes were installed prior to mobilization, to facilitate a sealed evnironment for SWC to install the anchors through. SWC had to check the seal by conducting pressure tests; if the test failed, the contact pipe had to be grouted, re-drilled, and the seal re-checked. SWC worked with divers, who assisted with setting the  installation of hardware underwater.

More info: http://www.southwestcontracting.ca/projects/ruskin-dam-generating-station-intake-anchors

#constructioncompany #rockanchors #seismicupgrade  
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BC Children's and Women's Hospital

As part of the development of the TECK Acute Care Center for the BC Children's and BC Women's Hospital, SWC was contracted to provide all of the site civil work, as well as the excavation and shoring.

Site civil work included installation of the sanitary sewer, storm sewer, water main, communication ducts, an Atlantis-D storm tank, and and a decontamination tank.

Earthworks and shoring included bulk excavation, detail excavation, 7300 lineal meters of drilling and anchor installation.

This project showcases the versatility of SWC. As it was a design-build project, changes to design and drawing revisions were frequent. Having Excavation, Shoring and Civil divisions which work together and communicate effectively was of paramount importance to providing high-quality, efficient work for the successful completion of the project.

More info: http://www.southwestcontracting.ca/projects/bc-childrens-and-womens-hospital--2

#constructioncompany #sitepreparation #shoring #excavation  
BC Children's and Women's Hospital
BC Children's and Women's Hospital
southwestcontracting.ca
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Port Mann Retaining Wall

A pig launcher is being installed at the Port Mann Station by Fortis BC to facilitate mechanical cleaning and inspection of existing NPS 36 Fraser River pipeline. The location of the pigging station is in the area of a large slope, part of which needed to be removed. The Project invovled the installation of a retaining wall for the stabilization of the slope, and was designed to resist seismic forces.

Originally, the wall was designed as a jet grout and steel pile retaining wall, with a whaler beam and ground anchors. Due to very limited working space (the transmission lines had been daylighted prior to start of work) and a lack of potable water, SWC made a proposal to replace the jet grouting with secant piles, to be installed by Henry Drilling Foundation (HDF).

As HDF began secant pile installation, boulders were encountered, which had not been shown in the borehole logs. This unexpected ground condition would have made it nearly impossible to obtain a consistent jet-grout wall.

This project was schedule-driven, and as the unforeseen boulders set back the schedule, SWC worked long hours and was able to finalize the project within budget and on time.

More info: http://www.southwestcontracting.ca/projects/port-mann-retaining-wall

#constructioncompany #construction #shotcrete #secantpiles #anchors
Port Mann Retaining Wall
Port Mann Retaining Wall
southwestcontracting.ca
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John Hart Dam Tunnel Portal Shoring

A portion of the John Hart Dam Generating Station Replacement Project includes a bored tunnel to divert a large water line.  Originally, the two tunnel portals were designed with sheet pile shoring walls to allow for an approach excavation to bedrock.  However, prior to construction of the sheet pile walls it was determined that the soil conditions were too hard to drive sheet piles.  SWC was subcontracted by the design-build general contractor to help design and then install permanent soil nail and shotcrete walls to replace the sheet pile walls.

http://www.southwestcontracting.ca/projects/john-hart-dam-tunnel-portal-shoring

#construction #shotcrete   #shoring  
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Bon Accord Creek, Surrey, BC

A new pedestrian bridge was planned to cross Bon Accord Creek in Surrey, BC.  The bridge was a composite steel and concrete design supported by two end abutments and two piers.  The two piers were concrete pile caps on the embankment on either side of the creek.  Each pier was supported by 8-ea micropiles to carry vertical loads, and 6-ea tieback anchors to carry lateral loads.  Both micropiles and anchors were threaded rod in 8”-dia steel casing.  The biggest difficulty on this job was access, specifically while working on a steep slope to install the 8” casing through the relatively hard till.  SWC accomplished the anchor installation by using two different excavator mounted drills.  The first was used to install the casing, while the second was used to install the threaded rod inside the casing.  Difficulty with dense soils containing cobbles and boulders slowed production, and several changes to the drilling methods were required.  In the end, all the soil anchors were installed with successful load tests to allow for construction of the bridge.

More info: http://www.southwestcontracting.ca/projects/bon-accord

#construction #anchors #micropiles #tieback  
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Cheakamus River, Whistler, BC

Along the Sea to Sky Trail south of Whistler, an existing timber bridge used to cross the Cheakamus River was deemed to be unsafe, and was closed.  The replacement was designed as a cable suspension bridge anchored into the bedrock on either side.  The difficulty with this job was in access, which was only available via the trail.  SWC mobilized a mini air-track drill which was used to successfully install the anchors.

More info: http://www.southwestcontracting.ca/projects/cheakamus-river-pedestrian-bridge-whistler

#construction #whistler #micropiles #anchors  
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Edmonton, Alberta

The project consisted of the replacement of a 100-year old steel bridge connecting residential and downtown Edmonton. Permanent slope protection was designed for the existing hillside adjacent to the bridge to facilitate a new Single span bridge and the increase hillside loading for the new bridge abutments.

Soil nails were used to provide global stability of these embankments.  To prevent localized sliding, heavy wire mesh was connected to the soil nails.  Topsoil fill and landscaping were then used to hide the mesh and create a root matrix at the face of the slope retention.  Due to the weak nature of the surface soils, hollow threaded bars were used so that the soil nails could be installed without the use of casing.

This allowed the use of air track tethered to a D6 dozer and an excavator mounted drilling specially sourced for this project for the challenges of the steepness of the embankment.  A majority of the soil nailing work outside the footprint of the existing bridge was completed ahead of the demolition in order to minimize schedule impacts.  After the bridge was taken down, the remainder of the soil nails were installed then all of the mesh.  The slope retention work was completed on time and under budget.

More info: http://www.southwestcontracting.ca/projects/soil-nailing-mesh-for-permanent-slope-retention

#construction #edmonton #soilnails #sloperetension  
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Station Square, Vancouver

The storm sewer is a large diameter 750 concrete system that crosses Kingsway Avenue in Vancouver, BC.  Kingsway has a unique road structure as it has the ‘normal’ gravel structure but includes a 250mm concrete slab and 150mm of asphalt.  The traffic management that needed to be done while installing the storm sewer and reinstating the road made this a challenging project.

More info: http://www.southwestcontracting.ca/projects/station-square-offsite-services-in-progress

#roadworks #construction  
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Phase 4 - Simon Fraser University

The project included construction of a detention pond, rock gabion wall, and lock block wall. Also, SWC constructed University Crescent, which involved 7300 cubic meters of fill, and installed storm/sanitary and water sewers.

More info: http://www.southwestcontracting.ca/projects/phase-4-sfu

#sitepreparation  
#SFU   #univercity #construction #constructioncompany #excavation  
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6600 Marine Drive, West Vancouver.

This project involved reinforcing an existing stacked rock retaining wall at the 6600 block of Marine Drive in West Vancouver.  Since the wall was located on the downhill side of Marine Drive, suspended platforms and an excavator-mounted drill were required to safely complete the work.

SWC implemented traffic control to reduce traffic to one lane of alternating traffic.  An initial lift of approximately 100mm-thick shotcrete was applied to the existing wall to bind the rock.  Anchors were installed using excavator-mounted drill sitting on Marine Drive.  The drill consisted of an air track mast mounted on a 225 excavator.  Once the anchors were installed, a layer of welded wire mesh was installed, followed by the final 75mm of shotcrete.

More info: http://www.southwestcontracting.ca/projects/6600-marine-drive

#constructioncompany  
#construction #shotcrete #anchors #drilling #retainingwall  
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