| 摘要 |
PROBLEM TO BE SOLVED: To provide an existing pile investigating method which facilitates investigation of the sturdiness of a cylindrical existing pile from the interior of the same, and to provide an existing pile reinforcing method which facilitates pile reinforcing work in a short period of time. SOLUTION: In implementation of the investigating method, a work hole 10 for drawing a core is formed in an existing footing 1, and a small underwater television camera 20 is inserted from the work hole 10 into a cavity 11 in the cylindrical existing pile 2, to thereby investigate the sturdiness of the interior of the existing pile 2. If it is diagnosed that a defective portion exists inside the existing pile 2 and that reinforcement thereof is necessary, or if it is determined that reinforcement of the pile is necessary based on seismic capacity evaluation, the interior of the existing pile 2 is reinforced from the work hole 10 by placing concrete. Placement of concrete is carried out after draining the interior of the existing pile 2, and part of the existing pile is reinforced by inserting a reinforcing cage 50 and/or a steel pipe 60, or the interior of the entire existing pile is reinforced by placing steel reinforced concrete. COPYRIGHT: (C)2004,JPO
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