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TRENCHLESS TECHNOLOGY >> MICRO
TUNNELING |
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The North American definition of microtunneling describes a method and does not impose size
limitations on that method. The tunnel may be considered a microtunnel if all of the following features
apply to construction: the microtunneling boring machine is remote controlled, a laser guidance system is
employed, a jacking system is used for thrust, and continuous pressure is provided to the face of the
excavation to balance groundwater and earth pressures.
**As defined by American Society of Civil Engineers.
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