Double prism
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Solving curves in tunnel monitoring |
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(Reporter 50, April 2004) In today's big cities, there is often new construction under already existing infrastructure. This raises a big
safety issue, making it necessary to stringently monitor the stability of existing buildings and also for signs of
movement or distortion during construction. Specific requirements of projects are always creating new
challenges for surveyors, and in Singapore the new tunnel construction at Dhoby Ghaut station has done just
that - necessitating the use of bi-directional prism to enable monitoring along the curved tunnel.
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