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Ground stabilisation: Creating a new level

Subsidence repairs on a home in Macclesfield have been fast tracked using a resin injected solution

Buying property to renovate to sell on or to get more for your money is a growing trend in the UK and one buyer in Macclesfield expected refurbishment to be a quick process. However, the free-swinging doors in Eddie Connor’s new home needed more than just rehanging – the property was suffering from subsidence with differential settlement of up to 82mm.

Underpinning used to be the go to solution for repairing subsidence damaged buildings but ground stabilisation specialist Mainmark believes that the resin injection solution is used on Connor’s home offers a better approach. According to Mainmark, such techniques can allow the whole structure to be relevelled in one process rather than the traditional approach that calls for external wall and internal fittings to be treated separately.

2. injectors external view

2. injectors external view

Relevelling was undertaken using multiple injection points around the exterior of the house

Connor’s brick built two storey home was only 12 years old but poorly compacted, sloping ground had resulted in subsidence below the floor slab. The house was not yet structurally unsound but the issue needed to be addressed before the planned renovation work was started.

Traditional underpinning was considered but this would have only stabilised the building and Connor wanted a solution to lift and re-level the structure in order to simplify the internal repairs.

Mainmark was brought in and used its Jog computer-controlled grouting method to undertake the work in a five day window. According to Mainmark, the Jog system provides an extremely precise method for stabilising soils, consolidating weak ground, and lifting foundations to deliver specific, engineered outcomes.

The computer control of the process places minimal stress on separate sections of the structure because all parts are supported and lifted together using small sequenced injections of high-mobility fast-setting cementitious grout.

photo v15 g290 settler crt glen waverley vic jog img 6746

photo v15 g290 settler crt glen waverley vic jog img 6746

The re-levelling was computer controlled

Limited access to the site with a shared driveway meant that the project needed to be carefully planned before moving onto site but the re-levelling was complete within the set time frame.

The result allowed Connor to start the refurbishment and move in as planned.

“This example highlights the capabilities of modern technology,” says Mainmark commercial manager Robbie Blanchfield. “Ground engineering is still a significant job to carry out, however, these advanced solutions are game changers for homeowners and commercial businesses due to the savings in cost, time and inconvenience.”

 

 

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