GFWAust carried out permeation grouting to stabilse tthe sand beneath the retaining wall at the rear of the site.

A narrow section of land between two five star apartments opposite Bondi Icebergs is being developed by Bellevarde Construction.  The site is underlain by sand overlying sandstone rock. The developer installed hand dug piles along the back boundary but these were held up on loose rocks. GFWAust were asked to carry out sand stabilization behind and beneath the retaining wall to enable the developer to underpin the retaining wall in stable conditions.

GFWAust carried out permeation grouting with stable ultrafine cement grout mixed with a microsilica slurry to provide stability to the grout, and a superplasticiser to assist with dispersion of the grout into the sand.