| 摘要 |
A method for measuring subsidence of the roof of an underpass is provided to control the thickness of asphalt being paved on the roof and protect the underpass. A method for measuring subsidence of the roof of an underpass is characterized in that a subsidence measurement member(80) is installed by burying and coupling an outer cover(20) and a wire fixing unit(40) into the wall and the roof of the underpass, and a management part monitors subsidence of the roof of the underpass by checking the graduation of a measurement rod(50) of the subsidence measurement member, which is changed as the measurement rod falls down by the vibration generated when cars pass through above-roof road.
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