Low-Cost CAP-type TDR Exploration Techniques for Leak Detection

ABSTRACT The river levee collapse and flood damages are dramatically increased due to the floods which caused by abnormal weather nowada ys. The counterplan like TDR(Time Domain Reflectometry) river levee leaking exploration technique is needed to that levee failure c auses of levee failure such as levee failure by penetration, piping, inadequate levee materials selection, poor compaction are almost 52% of the failure. This research practiced various comparing experiment s of existing TDR(probe and tube types) and developing CAP typ e TDR to evaluate acrylic small CAP mould and low-cost TDR levee leaking monitoring system which was used probe type TDR. As the result, evaluated TDR system had 20cm critical exploration performance which was a leaking exploration performance, The functional ratio of TDR exploration sensitivity of dry density wa s sensitive more than 3 times than dry density, and weathered granite soil foundation water contents(w) ―dielectric constant( ϵ) corelation formula was suggested to measure functional ratio on developing cap type TDR system.