Railway Interchange 2019

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Remediation of a Progressive Slope Failure (Room 103 A)

24 Sep 19
3:30 PM - 4:00 PM

Tracks: AREMA Technical Sessions By Date- Maintenance-of-Way, AREMA Technical Sessions By Functional Group- Maintenance-of-Way, Technical Sessions By Day- Tuesday

On Norfolk Southern Railway’s CNO & TP Lake Division near Crescent Springs, Kentucky, there was a progressive slope failure that accelerated with spring rains and thawing to the point where there was concern for the stability of the rail line. Fenton was contracted to perform emergency remediation work to stabilize the slope over a 500-foot-long area. Fenton first installed a 1,500LF long access road to facilitate the repair of this work. The scope included installing 70 drilled shafts at varying lengths. Next H Piling was installed in these drilled shaft locations and then each shaft was cast with concrete. After H Piling was installed, sheet pile lagging was installed between the H Piles that were on 5’ centers. This work provided a factor of safety (FOS) of slightly more than one. To increase the FOS to 3, Nicholson Construction installed 26 75-kip rock anchors. The 70-foot-long anchors were installed using duplex drilling techniques with an excavator mounted TEI drill mast. The excavator was able to drill from the top of the slope reaching over to install the anchors. Anchors were drilled through ballast, clay and into weathered shale and limestone. After the anchors were installed, Fenton installed walers to connect the anchors to the solider piles. *Missed this Session or want to view it again? Stop by the VirtualAREMA kiosk located in the Registration area to purchase this product today!