Remote monitoring of slope movement using electronic instrumentation can be an effective approach for many unstable or potentially unstable slopes. Water levels can be observed using vibrating wire piezometers. Movements and deformation can be determined ...

Time Domain Reflectometry (TDR) is a remote sensing electrical measurement technique that has been used for many years to determine the spatial location and nature of various cable faults. In the 1950s TDR technology was adapted to locate and identify faults ...

Time domain reflectometry (TDR) is a method of locating the depth to a shear plane or zone in a landslide. TDR uses an electronic voltage pulse that is reflected like radar from a damaged location in a coaxial cable. To monitor slope movement, coaxial cables ...

Many options are available for monitoring unstable slopes. The remote location of many unstable slopes has created a need for systems that can be accessed remotely and provide immediate warning in case of a failure. Advances in electronic instrumentation, ...

Time domain reflectometry (TDR) is used to determine embankment slope movement and piezometric levels easily, safely and economically. The digital nature of the data allows remote monitoring by telemetry. A cable tester sunds a waveform down a coaxial cable ...

The author's research and experience suggest a number of additional geotechnical monitoring applications for TDR. For example, foam or air filled coaxial cables can be used to monitor groundwater levels. The presence of water in the dielectric produces a characteristic ...

Time domain reflecometry (TDR) was originally developed to find breaks in power and communication cables. When a coaxial cable is deformed, the impedance characteristics of the cable change. Changes in impedance are noted as changes in the characteristic TDR ...

The landslide is occurring in rocks of the Franciscan Complex. In the area of the roadway it moves on the order of 1.5 to 3.0m/yr. Two inclinometers were installed in the slide to determine the depth to the failure plane(s). One of the inclinometers is located ...

The use of time domain reflectometry (TDR) to monitor movement in embankments and slopes is an emerging technology. TDR was originally developed for the telecommunication industry to locate breaks in cables. TDR is a time dependant pulsing electronic signal ...