TUNNEL GROUND MEASURING APPARATUS USING GROUND REINFORCING PIPE BODY HAVING OPTICAL FIBER SENSOR, AND GROUND REINFORCING AND GROUND MEASURING METHODS CAPABLE OF ON-SITE TUNNEL MEASUREMENT USING SAME

摘要

The present invention provides a ground reinforcing pipe body having an optical fiber sensor. An optical fiber sensor, which is capable of measuring a ground deformation in a tunnel face and a deformation of a reinforcing pipe body, is fixedly installed in or out of a ground reinforcing pipe body (steel pipe or synthetic resin pipe) which is inserted into and installed in the ground ahead of the tunnel pipe. The installed optical fiber sensor, which is inserted into steel strands twisted into a plurality of strands, is configured as an optical fiber sensor steel strand protecting body so that the optical fiber and a synthetic resin-based coating portion thereof are protected from external heat and impacts. The ground reinforcing pipe body (steel pipe or synthetic resin pipe) that is inserted into a perforated hole perforated in advance in the tunnel face is integrally and successively fixed along the length of installation of the ground reinforcing pipe body in the perforated hole along with the optical fiber sensor steel strand protecting body which is configured from the optical fiber sensor and the steel strands surrounding the synthetic resin-based coating portion.;COPYRIGHT KIPO 2014;[Reference numerals] (1h) Perforated hole (drilling hole); (3) Reinforcing pipe body (steel pipe); (AA) Perforated hole; (BB) Underground; (CC) Face; (DD) Footing; (EE) Drilling rod; (FF) Perforating equipment; (G) Grouting material