Micro Tunnelling

Micro Tunnelling is a trenchless construction method used to install pipelines beneath highways, railroads, runways, harbours, rivers, and environmentally sensitive areas. Micro Tunnelling is defined as a remotely-controlled, guided, pipe-jacking operation that provides continuous support to the excavation face by applying mechanical or fluid pressure to balance groundwater and earth pressures. Support at the excavation face is a key feature of Micro Tunnelling, distinguishing it from traditional open-shield pipe-jacking.  Micro tunnel boring machines are very similar to tunnel boring machines (TBM) but on a smaller scale.. The Microtunneling machine and jacking frame are set up in a shaft at the required depth. The operator is given constant feedback about the machine’s location, orientation and hydraulic devices via a computer console or CCTV camera.