OUR METHODS

Efficient and effective solutions for each project.

 

The Pezzimenti Trenchless system ensures all types of pipes are able to be installed, including uPVC and poly pipe for fast and efficient installation, and Hobas jacking pipes, Humes or Rocla concrete jacking pipes and steel sleeves, which can be used for larger bores requiring continuous ground support.

Each method uses a laser-guided microtunnelling system with vacuum extraction to remove spoil from the cutter face directly into a tank for dumping on- or off-site.

Method 1: Free Boring

 

Free boring offers an ideal way to install services utilising conventional pipes. In cohesive, stable clays, mudstone and rock, free boring is the most economical method of service installation as conventional pipes can be inserted into the bore. From our perspective, these types of installation are generally the simplest, as the bore self supports. Jacking pipes or a steel sleeve can still be inserted but are not required for continuous ground support.

Method 2: Sleeve Boring

 

This term is generally used when the outer pipe is steel and another pipe is to be later inserted into it to act as the carrier pipe. This method allows for the steel sleeve to be inserted directly behind the drilling head for continuous ground support. Sleeves are used when encountering unstable ground conditions or when boring under major roads and rail crossings.

Method 3: Pipe Jacking

 

Pipe jacking is the term used to describe the process whereby the pipe that is inserted behind the drilling head is to be both the outer pipe for ground support and the carrier pipe. The jacking pipe is generally a Humes or Rocla reinforced concrete jacking pipe or a Hobas GRP jacking pipe.