| 摘要 |
PURPOSE:To detect Young's modulus in the inside of a structure by burying a hollow columnar pipe containing a heat expansion pipe, through a concrete column of the same quality in which a distortion detecting means is buried and a load transducer, when deposit concrete. CONSTITUTION:When deposit the concrete 1, a concrete column 9 of the same quality and containing case 2 having an expansion pipe 3, etc. are provided in advance. When an electric heater 5 is conducted through a cable 6a, the expansion pipe 3 is heated and expanded, and a flange part 36 presses a flange part 8a of a load transducer 8. The load transducer 8 outputs the pressing force to the outside through a cable 6b, also a flange part 8b presses the lower end part of a concrete column 9, and a compressive distortion is generated. A distortion detector 11 outputs a displacement in a prescribed range of the concrete column 9, to the outside through a cable 6c. By using this load and distortion quantity, the Young's modulus of the concrete 1 is derived. |
