METHOD FOR NON-DESTRUCTIVELY INSPECTING FOUNDATION PILE

摘要

PROBLEM TO BE SOLVED: To grasp the conditions of existing foundation piles in a state where an existing structure exists. SOLUTION: The range of inspection is subdivided in a mesh shape in such a way as to maintain any given constant shape over a range in which the grasping of the location of a foundation pipe 5 is desired with a foundation slab main body 2 is present. Accelerometers 1 are arranged at the points of intersection in the set mesh, and a light hammer 10 is used to hit the foundation slab main body 2 close to the accelerometers 1. Frequency analysis is performed on waveforms detected by the accelerometers 1. In the case that some frequency components are conspicuously detected, it is determined that the foundation pile 5 is not present under the foundation slab main body 2. These operations are repeated on every mesh to determine the presence or absence of the foundation pile 5 within the range of inspection.