Open AccessApplication of FCTEM60-1 Instrument in Invert Rebar Testing for Highway Tunnel
Author(s) -
Qiu-zhuo Liu,
Yao Wang
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/741/1/012005
Subject(s) - rebar , clamping , transient (computer programming) , current (fluid) , structural engineering , geotechnical engineering , engineering , computer science , electrical engineering , mechanical engineering , operating system
The invert of a highway tunnel is the foundation for the entire tunnel structure. Its quality has a direct influence on the stability of tunnel structure. However, in practice the tunnel invert has various defects for a variety of reasons. FCTEM60-1 instrument is able to rapidly cut off the current using constant voltage clamping technique, thus significantly reducing the shallow dead-zone effect of transient electromagnetic (TEM). In this study the instrument is applied to testing invert rebar execution in a highway tunnel. The study result shows FCTEM60-1 instrument successfully detected the invert rebar, demonstrating its feasibility and reference value to tunnel quality test.