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Ochrona przed obrywami skalnymi - Clackamas Highway, Oregon, OR224 2015

One of the completed Rockfall Impact Attenuator Systems

Ochrona przed obrywami skalnymi - Clackamas Highway, Oregon, OR224 2015

Rockfall source high above the installed Rockfall Impact Attenuator System

Ochrona przed obrywami skalnymi - Clackamas Highway, Oregon, OR224 2015

Rockfall Impact Attenuator System post installation using crane

Ochrona przed obrywami skalnymi - Clackamas Highway, Oregon, OR224 2015

The hybrid drapery solution during construction

Ochrona przed obrywami skalnymi - Clackamas Highway, Oregon, OR224 2015

TECCO® G80/4 mesh panels connecting using seaming ropes

Ochrona przed obrywami skalnymi - Clackamas Highway, Oregon, OR224 2015

Another completed Rockfall Impact Attenuator System

Ochrona przed obrywami skalnymi - Clackamas Highway, Oregon, OR224 2015

Low visual impact of the completed solution showing the real Rockfall Impact Attenuator Systems Advantage when made out of high tensile steel

Ochrona przed obrywami skalnymi - Clackamas Highway, Oregon, OR224 2015

Rockfall Impact Attenuator System blending in with the natural environment

 

Zastosowane systemy

 

Dlugosc systemu od

393 m

 

Rok Instalacji / Montazu

2015

Sytuacja początkowa

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.  

Opis zastosowanego rozwiazania

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. 

  

Inwestor

Oregon Department of Transportation

Projektant

Oregon Department of Transportation

Wykonawca

High-Tech Rockfall Construction, Inc.

Chroniony Objekt

Road

Ochrona przeciwerozyjna

Galvanized, GEOBRUGG SUPERCOATING

Osoba kontaktowa na miejscu

René Müller
   

René Müller

Country Manager Kantone AG BE BL BS FR GE JU NE SO VD VS

Zagrożeniami naturalnymi
Nżynieria hydrauliczna
Kopalnie / Wydobycie / Tunel
Geobrugg AG,Industriestrasse 21,5200 Brugg / Szwajcaria Country Manager Kantone AG BE BL BS FR GE JU NE SO VD VS

Formularz kontaktowy

Olivia Sartorius
   

Olivia Sartorius

Zagrożeniami naturalnymi
Nżynieria hydrauliczna
Kopalnie / Wydobycie / Tunel
Geobrugg AG

Formularz kontaktowy

Alexander Bittendorfer
   

Alexander Bittendorfer

Project Manager Inspection Services

Zagrożeniami naturalnymi
Geobrugg AG,Trucks via road 14 or 13 only!, Aachstrasse 11,8590 Romanshorn / Szwajcaria Project Manager Inspection Services

Formularz kontaktowy

Isacco Toffoletto
   

Isacco Toffoletto

Zagrożeniami naturalnymi
Nżynieria hydrauliczna
Kopalnie / Wydobycie / Tunel
Geobrugg AG Ticino,Via Brusada 5,6933 Muzzano / Szwajcaria

Formularz kontaktowy