Special cutter made for clay bore , notice the outside teeth can collapse to allow the cutter and head to be withdrawn from the steel sleeve should things go wrong.
Steel sleeve being lowered into position on jacking frame.
Boring underway.
Brisbane > Ipswitch Highway.
Another bore for SEQUID , in Brisbane on the Ipswitch Highway . Larger vacuum tunnelling machine used here , 520mm diameter bore. Mixed ground conditions with floaters (river bed rocks) along with a tight time shedule made this a challenging exercise. Special cutter were prepared for the soil conditions. Here steel sleeve was pushed along as we bored.
Special cutter made for clay bore , notice the outside teeth can collapse to allow the cutter and head to be withdrawn from the steel sleeve should things go wrong.
Steel sleeve being lowered into position on jacking frame.
Boring underway.
Special cutter made for clay bore , notice the outside teeth can collapse to allow the cutter and head to be withdrawn from the steel sleeve should things go wrong.
Steel sleeve being lowered into position on jacking frame.
Boring underway.