I6 In-Place Inclinometer. MEMS Sensors.

Geodaq’s 6th generation In-Place Inclinometer measures vertical or horizontal movements using a closely spaced (up to 12 inches) network of digital MEMS sensors. Each module is 8-feet in length and is made from flexible ABS plastic to withstand significant shear displacement. Various inclinometer lengths can be created by connecting multiple modules together end-to-end forming a continuous chain of tilt sensors. Our patented 4-wheel centralizer attached to the outside of the housing allows for installation in 2.75-inch diameter inclinometer casing. A single cable connects to our GCM4 controller to collect inclinometer displacement profiles in real-time.

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Lateral Load Testing of Drilled Shaft Foundations

Geodaq in-place inclinometers were used by researchers at Oregon State University to measure lateral displacement profiles of drilled shaft foundations. Lateral load transfer characteristics were derived from measured lateral displacement profiles obtained by our Model i6 in-place inclinometers with a high sensor density (sensor spacing of 12 to 24 inches over full shaft length).

» Armin Stuedlein (PI)

» ASCE Paper

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Alaska Highway Slide Monitoring

Long term monitoring of two permafrost regions with slope instability was performed by the University of Alaska and the Alaska DOT. Because Geodaq inclinometers can be installed inside conventional inclinometer casing, our inclinometer was used to monitor slope movements at two sites: one in south-central Alaska and one in northern Alaska. The total length of the in-place inclinometer was 67.5 feet, and a total of about 80 cm of lateral movement was recorded over a depth zone of about 2 meters before shearing the inclinometer in half.

» Geotechnical News Article

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Mormon Island Dam Excavation Monitoring

Seven key-block cells were added to the Mormon Island Auxiliary Dam to improve seismic safety. Geodaq monitored wall displacements using its proprietary in-place inclinometers installed at two sides of each key-block cell. Each in-place inclinometer was 80-feet installed inside standard 2.75-inch diameter casing embedded within the secant pile walls. Forces in struts and wales were monitored using up to 66 vibrating wire strain gauges. Results were viewed in real-time by all project team members using our web application software.

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Caltrans Highway 299 Landslide

Highway 299 in Northern California is a heavily traveled two-lane highway that runs over an active earthflow that may slide at more than one location below the ground surface. Geodaq monitored slide movements in real-time by installing two of its in-place inclinometers, one upslope and one downslope of Highway 299. Groundwater levels were also monitored with piezometers. Each station was equipped with solar panels and a 35 Amp-Hour battery. Results were transmitted to our web server computer using a wireless internet modem.

» TRB Publication

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UCLA Levee Monitoring

Settlements and pore pressures beneath a test levee in the Sacramento San Joaquin Delta were remotely monitored for researchers at UCLA. Geodaq’s in-place inclinometer was installed horizontally to acquire settlement profiles to characterize primary and secondary consolidation of soft peat soils beneath the levee. Settlements and pore pressures were recorded before and after a series of dynamic shaking tests. Geodaq provided remote data collection and web based monitoring services and readings were acquired as often as every 10 minutes providing detailed response of ground water levels and settlement behavior.

» ASCE Publication

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Real-Time Monitoring at Perris Dam

Perris Dam is an earthen dam 125 feet high and 2.2 miles long, in Riverside County, California. Potential dam movements during construction were monitored in real-time using 4 of Geodaq’s in-place inclinometers ranging in length from 42 to 170 feet. A total of 14 remote monitoring stations collected and delivered results for the inclinometers and 10 piezometers. All results were transmitted from the site and available to project team members in real-time using Geodaq’s proprietary web application software.

» USSD Publication

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