Platform Preparation: Bulk Earthworks

The contractor was engaged to raise the platform level by 900mm as part of the bulk earthworks scope. This was necessary because our geotechnical engineer, in the bearing platform design, specified that at least 600mm of existing material had to be excavated and replaced to construct a suitable bearing platform.

The bearing platform needs to support a pressure of 250kPa, which is required to allow a 47-tonne drill rig to safely travel across the site. It must also provide enough bearing capacity for both the sheet piling contractor’s drill rig and a 30-tonne excavator to move around the platform safely, without any risk of instability or overturning.

In the short video, you can see a 14-tonne excavator loading a truck. We had six trucks operating in rotation to remove the excavated material from site.

The bulk earthworks took two days to complete, with approximately 600m³ of fill removed from the site.

The next stage is to import 180m³ of Type 2.3 CBR45 material back to site. This material will be placed and compacted in layers of no more than 150mm. Once complete, the platform will undergo density testing for moisture content and compaction compliance before being signed off and certified by the geotechnical engineer.

The platform certification will then be issued to the sheet piling contractor prior to the commencement of their works on site.

Stay tuned — more videos will be uploaded soon.

Thank you.