Pilot TBM are a relevant solution when minimizing disruption to local residents and business owners is essential.
The pilot technique is used in soft, dry or wet non supporting soils for small diameters, typically:
The pilot machine has a very small footprint and can comfortably fit in a back or front yard setting. The machine is commonly used to construct pipelines up to 90m in length in such settings for large backlog or infill sewer projects where the technique is advantageous in minimising disruption to local residents and business owners.
The technique requires a small diameter pilot rod to be pushed through on line and grade from the launch to reception shaft. Once through, a casing pipe with auger attached is used to remove material along the alignment with the carrier pipe being progressively installed behind the casing to construct the pipeline.