Good morning—quick update on the progress from yesterday.

Yesterday: CBR layer completed and compacted

Yesterday, we received and fully installed all the CBR 45 Type 2.3 material. That brings the platform to 300mm thick. We then rolled it thoroughly with the static roller.

There was some minor vibration, but only for a short period. For the record, the Dynapac (I believe it’s a CA4600D) runs at:

  • 30 Hz, 0.8 mm/s on lowest vibration amplitude setting
  • 2 mm/s on highest vibration amplitude setting

The maximum allowable vibration limit in accordance with our VMP, is between 5-15 mm/s for 10-50Hz vibration. Anything above 5 mm/s to 15 mm/s can risk structural damage—so we were well under that.

This morning: Geotech proof roll

This morning we had a quick meeting with the geotechnical team. Together, we completed a proof roll, which means the roller moves backward and forward across the platform while they monitor performance.

They’re looking specifically for deflection—basically confirming the platform can support the roller’s weight.

The geotech engineer mentioned the roller’s bearing pressure was about 220 kPa, and they want to see around 245 kPa. We went over the whole platform, and we identified one soft spot, marked here with pink paint.

Next steps: steel plates for the soft spot and piling rig

We’ll now arrange to hire 25mm steel road plates—likely two or three. Instead of digging up and rebuilding the area (which is an option), we’re choosing steel plates because:

  1. We need them to get the piling rig down the driveway and into the machinery area safely.
  2. We also need steel plates for the sheet piling work at the end of the property.

At the far end, the sheet piling is about 1 meter off the revetment wall. The piling rig will be about 1.5 meters back from that point. For safety, we’ll place the steel plates so the rig can use its outriggers on a stable base while pushing piles into the ground.

They also have sensors throughout the rig system. If the machine starts pushing down too much, it triggers safety controls and stops the pushing operation—so we need the base stable to keep everything moving smoothly.

More geotech testing (nuclear test)

We also have the geotech team coming back to do the nuclear testing of the CBR.

This involves a special testing device with a metal plate and probes. They insert a rod to the required depth (here, 300mm), then install the probe and measure results based on expected values for Type 2.3 CBR 45. This helps confirm:

  • whether we’ve achieved the right compaction rating
  • whether moisture content is acceptable
  • and whether the platform is suitable for the piling rig

Once that’s complete, I’ll sign off and the sheet piling company will have what they need to start.

Site progress and next meeting

We also had some artwork installed around the site—hello to everyone involved!

Yesterday ended up being a bit faster than expected. We had four trucks rotating in from the quarry, which helped a lot. The platform equipment included the skid steer and leveling bar.

I’ve got a meeting booked for next week with the sheet piling company to walk over the platform, talk through their approach, and confirm the installation date. After that, we’ll capture some video to document the next steps.

So that’s it for today—thanks for checking in!