| 摘要 |
PROBLEM TO BE SOLVED: To enable a sensor to be protected from concrete pressure while the sensor can be attached from the outside.SOLUTION: A sheath body 2, which is molded in a spiral irregular shape, into which prestressing steel is inserted and into which grout is injected, is provided with a filling sensor 10 for detecting grout filling conditions. At least a tip side of the filling sensor 10 is covered from the outside with a cover part 11a of a sensor cover 11 integrated with the sheath body 2, and wiring 10b is extended from a back end side. |
