Wang & EF Tan Associates

Consulting & Registered Surveyors



Tunnel Survey is that branch of survey that is concern with the surveying in a tunnel. This type of survey is required in mining works, deep tunnel sewerage works and underground railway works.


The techniques used in this type of survey is different from those used on ground. GPS cannot be used in tunnel survey because satellite signals cannot penetrate through land.

In tunnel survey, laser total stations are used to give alignment together with gyroscopic instrument.

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