United States Department of Transportation
i
IN-SITU MONITORING OF INFILTRATION-INDUCED INSTABILITY OF I-70 EMBANKMENT WEST OF THE EISENHOWER-JOHNSON MEMORIAL TUNNELS, PHASE II
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2017-12-25
[PDF-5.44 MB]
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Abstract:Infiltration-induced landslides are common hazards to roads in Colorado. A new methodology that uses recent advances in unsaturated soil mechanics and hydrology was developed and tested. The approach consists on using soil suction and moisture content field information in the prediction of the likelihood of landslide movement. The testing ground was an active landslide on I-70 west of the Eisenhower/Johnson Memorial Tunnels. A joint effort between Colorado School of Mines, CDOT, and USGS performed detailed site characterization, set up and calibrated a hydrological model of the site based on three years of field data, and performed a preliminary stability analysis of the slope. Results indicate that the unique hydrology of the site is a key component in its stability and considering the whole water basin and not just the failure area is important.
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