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A trenchless construction method for installing pipelines. Microtunneling uses all of the following features during construction:
- Remote controlled - The microtunneling boring machine (MTBM) is operated from a control panel, normally located on the surface. The system simultaneously installs pipe as spoil is excavated and removed. Personnel entry is not required for routine operation.
- Guided - The guidance system usually references a laser beam projected on to a target in the MTBM and is capable of installing gravity sewers or other types of pipelines to the required tolerance for line and grade.
- Pipe jacking - The process of constructing a pipeline by consecutively pushing pipes and MTBM through the ground using a jacking system for thrust.
- Continuously supported - Continuous pressure is provided to the face of the excavation to balance ground water and earth pressures.