Problem

As part of a multifaceted development and remedial project, a timber framed building on concrete strip-footing at the Yankalilla Area School had a 15-metre wall leaning outwards. Significant cracks in brickwork and concrete support beam were evident due to the foundation rotating because of poor drainage causing saturation, and thereby weakening, soils.

Solution

The leaning wall was partially demolished and the soil beneath the footing was injected with a specified geo-chemical urethane solution to stabilise the structure before rebuilding of the remainder of the wall took place.

Result

Working closely with the builder and consulting engineers, we were able to design a scope of work to carry out all operations within a period of 48-hours and causing no disruption to other projects on site.

Problem

Built on swampland in 1923, the constant vibrations of heavy infrastructure in combination with the high-water table and clay foundation soil, the Osborne Power Station’s intricate pipe network was undergoing unprecedented levels of stress.

Providing energy to the National Electricity Market meant the plant needed to quickly respond to market demands, so timing of shutdown periods was unpredictable with maintenance windows of only 48 to 96 hours.

Solution

Our ability to reach 80 metres from our pumping plants enabled us to easily get to the core of the facility and access difficult and tight areas. We then created a ‘pile effect’ in the highly reactive clay foundation soil to enable us to re-level heavily loaded concrete slabs to within 1mm.

Result

Re-levelled surfaces and stabilised substrates provided a far more resilient base for the plant to more effectively operate upon and dramatically reduced stresses placed on infrastructure.

Problem

Removal of large trees adjacent to a recently built development of townhouses resulted in the disturbance of enormous roots beneath the dwelling and undermining their structural integrity and causing significant building damage.

Solution

Once the soils under the building slabs were permeated to prevent further erosion, the voids left by rotting and removed tree roots were filled with a specifically formulated urethane composition.

Injected via our keyhole delivery system, once complete, the 16mm holes in and around each of the injection sites and shed slab were grouted and colour-matched to existing finishes.

Result

Our non-invasive methods meant only a single day of disruption for residents and our footprint required no remedial work. Structural integrity restored almost without a trace.

Problem

Large voids under a 9,500 megalitre water tank undermined its structural integrity and were causing 80,000 litres of water to leak per day.

Solution

Working with Duratec Australia, we were able to formulate a specific urethane, chemically engineered for high load bearing capacity.

To stabilise the soil with a total of 6 tonnes of high-pressure structural resin, multiple keyhole injections across two main sites were undertaken, along with numerous satellite areas. The first application sealed the soil to ensure no further erosion and the second filled the substantial voids to support the entire structure.

Result

With the substructure stabilised, the waterproofing membrane and lining could be installed to the entire 80-metre-diameter, 9-metre-high tank saving more than 29,200,000 litres of leaked water every year.

Problem

Previous remedial work had proven unsuccessful in stopping the leaks reported on almost every floor and balcony of a 10-year-old building.

Solution

After the removal of over 100 tonnes of damaged and non-viable tiles, tile screed and inferior waterproofing materials, all concrete was repaired before a waterproof urethane membrane was installed.

A new tile screed, with correct falls to drains, was then applied in addition to a second waterproof layer before new tiles were re-laid as well as upgrades to davit arms, services, and outdoor amenities.

Result

Working with structural and civil engineers, Magryn & Associates, we overcame significant access restrictions and provided a complete solution within a condensed timeframe for the strata corporation and their 190 tenancies.