METHOD FOR INSPECTING CAVITY OF CONCRETE STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a method for inspecting a cavity of a concrete structure capable of inspecting the presence/absence and the extent of the cavity by boring a part of the cavity.

SOLUTION: A hole is bored in a concrete structure 100. Gas is made to flow in or out (hereinafter, referred to as "flow in and the like") from the hole 130 at a prescribed pressure. The volume of the cavity 120 communicated with the hole 130 is measured by a time fluctuation of the measurement pressure at a low pressure range when the measurement pressure starts to increase after starting the inflow. The volume of the cavity 120 communicated with the hole 130 is measured by the time fluctuation of a pressure ratio that is obtained by dividing the measurement pressure by a prescribed value when the measurement pressure reaches.

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