DUBLIN / COLERIDGE ST - RETAINING WALL
LYTTELTON - CHRISTCHURCH - 2016
On this project CMS were a subcontractor to Rock Control Ltd and McConnell Dowell SCIRT Delivery team.
This job was very complex and challenging, we think that that the results are very impressive.
On this project CMS did all the cast in situ concrete handrails.
This was the first opportunity we have had to use our new steel formwork, made and designed in house, the formwork performed well.
AVONSIDE DRIVE - CANOE ACCESS RAMP
AVONSIDE - CHRISTCHURCH - 2016
On this project CMS were subcontractor to the Downers NZ SCIRT Delivery team.
This was a unique, enjoyable and rewarding project for us.
The scope was to build a timber access ramp into the Avon River for public use. The ramp was built to replace a similar ramp that was damaged in the Christchurch Earthquakes.
Environmental protection was paramount with this project, a cofferdam was supplied and set up by Hydro Responce Ltd. Very gradually the water was pumped out from the dammed area and through sediment settlement tanks to avoid releasing sediment into the river. A platform was built on the river bed and geo-fabric laid down to contain any construction debris.
The piles were driven by Texco Ltd. Team members, Matt Voice and Isaac Watson then constructed the ramps retaining wall, platforms and decking before backfilling the wall.
Environmental controls were carefully removed and the ramp opened to the public.
GLENSTRAE ROAD - CAST IN-SITU RETAINING WALL
REDCLIFFS - CHRISTCHURCH - 2016
CMS were a major construction subcontractor on this job to the Downers delivery team.
This job involved replacing a damaged retaining wall that supports the road above. The job location is atop a steeply sloping cliff-face.
The excavation for this job was mostly into rock, this was done by excavator mounted rock breaker and hand held jack hammers. Excavating sufficient width to allow double sided formwork was uneconomical. CMS designed a single sided formwork solution for this project.
The majority of the strength in our design was achieved by chemically anchoring fiberglass rods into the excavated face and attaching these to steel and timber falsework. This wall is over 4m tall in places and 1000mm thick so many of these fiberglass rods were required. This wall also has a curved section that required a 9m wide by 2.4m tall shutter.
The pour totaled 44m3 of concrete. Our design was good and the forms held true under the pressure. The finished wall achieved a F4 finish.
CMS also installed at the reinforcing steel, and fabricated a vehicle crash barrier on this project.
WHAKA TCE - RETAINING WALL AND RELATED WORKS
HUNTSBURY - CHRISTCHURCH - 2015
CMS were a major construction subcontractor on this job to the McConnell Dowell delivery team. The site was essentially made up of two 50m long retaining walls. The top of the site was a Gabion wall that sustained minimal damage and the lower section was a heavily damaged crib wall. Work by CMS on this project involved complex set-out, in-situ concrete construction and road reinstatement to stringent SCIRT standards.
Our scope of works on this job
We worked closely with all stakeholders and residents and delivered this job on budget and ahead of schedule.
See link to SCIRT press release HERE
ROSSMOORE TCE - RETAINING WALL
CASHMERE - CHRISTCHURCH - 2013
This job was a SCIRT project and part of the horizontal rebuild of Christchurch.
CMS were engaged to construct a concrete retaining wall to replace an earthquake damaged section of wall. 100m long and varying height of 2.0m to 3.5m. CMS was a subcontractor on this job - the main contractor was Rock Control Ltd.
Rock Control removed the existing wall and installed rock anchors and shotcrete. CMS then installed rebar, single sided formwork and poured the wall. We used the Doka formwork system for its ease of installation. From taking over the site to completion was less than two weeks. The project was completed to specification, on time and within budget.
CARLTON MILL CORNER - BRIDGE REPAIR
MERIVALE - CHRISTCHURCH - 2015
This job was completed for McConnell Dowell as part of the SCIRT horizontal rebuild of Christchurch's infrastructure.
This bridge is situated at the Carlton Mill end of Harper Avenue. It was built in the 1960's and sustained damage to the approach walls in the Christchurch earthquakes.
Minor cosmetic repairs were made along the extent of the bridge as well as replacing a section of the damaged approach wall. This section of wall was the main aspect of this job for CMS.
The damaged wall was curved and had many ornate details. The new wall mimics these details to fit in with existing elements. Significant surveying of the wall was undertaken to record or mold all details before demolition began.
Two weeks were spent in constructing the formwork out of thin plywood laminated together to get the curve and details required. Once the forms we in place we made certain that there would be no movement by installing 120 sets of super ties and robust falsework.
We had Christchurch Ready Mix specify a special concrete mix design for this pour and used external vibrators. The result was a very good finish and an exact replication of the original wall.
AVONSIDE DRIVE - RETAINING WALL
AVONSIDE - CHRISTCHURCH - 2015
This project involved replacing a 10m long by 1.8m high earthquake damaged concrete retaining wall. Due to the wall being only 200mm thick with a double mesh of reinforcing steel we opted to build this wall using timber shutters and to vibrate the concrete using our electric external vibrators.
The existing wall had to be demolished. The existing backfill was excavated and removed from site, the excavated face was sloped to 45deg to allow safe construction of the new wall. One complete the wall was back filled with engineered fill and topped with a 300mm layer of topsoil.
Because this job was situated beside the Avon River we set up robust environmental controls including installing witches hats into the nearby storm water sumps and sediment sock around the site.
This was another SCIRT job and was completed within the allowed time frame and on budget.
DALGARVEN PLACE - CRIBWALL CONSOLIDATION
HILLSBOROUGH - CHRISTCHURCH - 2014
This is another SCIRT project in the Christchurch Rebuild.
This project required the removal of backfill from the face of the wall and replacing it with concrete. There was also a small amount of shotcrete and kerb and channel. Due to the time consuming process, ready mix concrete was not an option so all concrete was hand mixed on site as required.
This project required stringent environmental controls - all concrete was mixed over a large, custom made drip tray and a robust sediment control system was set up by CMS prior to commencing construction.
The TMP for this project was set for 12 weeks and we completed the job in 4 weeks. This job was built to specification, within budget and without variations to the original contract. A very tidy finish was achieved on the facing work in a difficult working environment.