情報化施工(3)

[VI-1089] A study of monitoring of concrete filling behavior with optical fiber sensor

〇Ken Mizuno¹, Takeshi Torichigai¹, Michio Imai¹, Junichi Kawabata¹, Manato Nakamura¹, Hiroaki Yamano¹, Shuji Matsumoto¹ (1.Kajima corporation)

Keywords:optical fiber sensor, filling detection, monitoring, tunnel lining concrete

In the case of concrete placing in narrow spaces such as the tunnel lining concrete, the blow-up method or the single-push method are used. In these methods, it is important to check the filling state, but the conventional filling detection sensor had problems such as “only the set point can be detected” and “they can’t be confirmed during placing”. In this study, we conducted an experiment with an optical fiber sensor that can measure the change of strain in a linear and real-time. As a result, it showed a possibility that optical fiber sensor can monitor the concrete filling behavior.