Microtunnelling Slurry Shield TBM

Introduction

Microtunnelling is a method of installing pipes below the ground, by jacking the pipe behind a remotely-controlled, steerable, guided, articulated microtunnel boring machine. Microtunneling can be defined as remotely-controlled, guided pipe jacking technique that provides continuous support to the excavation face and does not require personnel entry into the tunnel. The operation of the micro tunneling boring machine take place inside a control room located on the ground service. The system simultaneously installs pipe as spoil is excavated and transferred to the ground service via the slurry excavation system. Personnel entry is required only for working inside the shaft. Laser guidance system is commonly used for straight line alignment and gyro system for curved alignments.