ZCC Techno Private Limited

Micro tunnelling is a trenchless construction method used to install pipelines beneath highways, railroads, runways, harbours, rivers and environmentally sensitive areas. Micro tunneling 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 ground water and earth pressures support at the excavation face is a key feature of Micro tunneling, distinguishing it from traditional open-shield pipe jacking.

Micro tunneling required jacking and reception shafts at the opposite ends of each drive. Pipe jacking & Micro tunneling process is a cyclic pipe jacking operation. A micro tunnel boring machine (MTBM) is pushed into the earthby hydraulic jacks mounted and aligned in the jacking shaft. The jacks are then retracted, and the slurry lines and control cables are disconnected. A product pipe or casing is lowered into the shaft and inserted between the jacking frame and the MTBM or previously jacked pipe. Slurry lines and power and control cable connections are made, and the pipe and MTBM are advanced another drive stroke. This process is repeated until the MTBM reaches the reception shaft. Upon drive completion, the MTBM and trailing equipment are retrieved and all equipment removed.