USA
USA

Clackamas Highway, Oregon, OR224

MP 36.5 OR 224 (Clackamas Highway) Oregon, 97023, Estacada, Oregon
2015
Kunde
Oregon Department of Transportation
Planer
Oregon Department of Transportation
Ausführende Firma
High-Tech Rockfall Construction, Inc.
Geschützte Objekte
Strasse
Energieaufnahmevermögen
N/A
Systemhöhe
3.0 m, 4.0 m, 6.0 m
Systemlänge
393 m
Korrosionsschutz
Verzinkt, GEOBRUGG SUPERCOATING
Weitere verbaute Anwendungen
Steinschlagschutz
Ausgangslage

The Clackamas Highway (OR 224) is an expressway that passes through hilly farmland to the city of Estacada, OR, continuing southeast into the Mount Hood National Forest, ending to the small community of Ripplebrook. In September of 2014, a wildfire named Pit 36 broke out growing quickly and burning 5500 acres of the steep heavily timbered slopes (The Oregonian 9.15.14). Already near vertical highway rock cuts along OR 224, combined with freshly burned and exposed ground were perfect conditions for high rockslide and landslide potential. 

Not a short two months after the fire two rockslides dumped 350 cubic yards of material across both lanes of Highway 224 near milepost 35 forcing residents and loggers to take a 1-1/2 hour detour (The Oregonian, 11.10.14).  After an emergency clean-up of the rockslides the highway was reopened awaiting permanent rockfall mitigation measures to be implemented. Engineering Geologists from the Oregon Department of Transportation investigated the slopes and evaluated the rockfall hazard for a permanent mitigation strategy.  

Massnahme

Through the design process Geobrugg provided technical support on various flexible rockfall mitigation systems.  The Engineering Geologists from the Oregon Department of Transportation chose to mitigate future rockfall with the use of an Attenuator Hybrid Rockfall Barrier System.  

The Rockfall Impact Attenuator Systems supplied on this project utilizes GBE-500A post and rope infrastructure supporting TECCO® G80/4 [mm] mesh that drapes down to the safe runout zone at the toe of the rock slope. As specified in the projects plans, two attenuator hybrid rockfall barriers were installed as a part of this project.  One system is 300 feet long, with 4 meter tall posts, having an approximately 80 feet long TECCO® mesh draped tail. 

The second system was much longer at 987 feet in length and was customized with three system heights at 4 meters, 6 meters, and again dropping down to 3 meters.  Specialized posts were developed in order to transition between the various system heights in a continuous manner, optimizing post spacing and rope layouts. The draped TECCO® mesh tails on these systems are up to 100 feet long terminating nominally 10 feet above the toe of the slope.

The attenuator hybrid rockfall barrier systems are fully compliant with Buy America requirements for steel being made from steel forged and manufactured in the United States. 

  

Ansprechpartner

Fabio Suter
Fabio Suter
Head of Product Management Product Management
Naturgefahren
Geobrugg AG
Aachstrasse 11
8590 Romanshorn / Schweiz
Kevin H. Coyle
Kevin H. Coyle
Regional Manager Northeast
Naturgefahren, Uferschutz
Geobrugg North America, LLC
3 Beaudet Terr
Columbia CT 06237 / USA
Saleh Feidi
Saleh Feidi
Regional Manager California
Naturgefahren, Uferschutz
Geobrugg North America, LLC
8921 Emperor Ave.
San Gabriel, California 91775 / USA
John Kalejta
John Kalejta
Regional Manager Central US
Naturgefahren, Uferschutz
Geobrugg North America, LLC
3215 67th Avenue Pl
Greeley CO 80634 / USA
Bob Lyne
Bob Lyne
Regional Manager Southeast
Naturgefahren, Uferschutz
Geobrugg North America, LLC
8004 Windspray Drive
Summerfield NC 27358 / USA
Pierce Runnels, Civil Engineer
Pierce Runnels, Civil Engineer
General Manager Geobrugg North America
Naturgefahren
Geobrugg North America, LLC
22 Centro Algodones
NM 87001 Algodones / USA
Tim Shevlin
Tim Shevlin
Sales Director
Naturgefahren
Geobrugg North America, LLC
Salem OR 97302 / USA