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Cascade Mountain, US Highway 12

Consolidamento di versanti - Cascade Mountain, US Highway 12 2017

Rolled cable net (S4-250) / Cable Net drape with DELTAX® G80/2 mm wire mesh backing

Consolidamento di versanti - Cascade Mountain, US Highway 12 2017

Antiquated, traditional cable nets being replaced

Consolidamento di versanti - Cascade Mountain, US Highway 12 2017

Upsized and redundant support rope infrastructure. The support rope and flexible wire rope cable anchors were made of 1-1/8" ropes having 130 kip ultimate strength.

Consolidamento di versanti - Cascade Mountain, US Highway 12 2017

System is less than one year old and has taken a beating, according to WSDOT personnel. It's reported that the mesh and the rope and hardware infrastructure is holding up well.

Consolidamento di versanti - Cascade Mountain, US Highway 12 2017

Detail of olled Cable Net and DELTAX® after the impact

 

Anno di installazione

2017

Situazione iniziale

US Highway 12 is the Southern most pass that crosses the Cascade Mountain in the state of Washington, USA.  Numerous slopes near White Pass are active rockfall areas.  They have been mitigated over the decades with many solutions including numerous draped mesh systems composed of traditional cable nets.  One such antiquated cable net drape at MP 152 was draped across a rockfall chute and in 2017 was destroyed by severe rock and snow slides.  The Washington Department of Transportation decided to update the system with the stronger and improved Rolled Cable Nets (S4-250).

Geologia

White Pass Scenic Byway and was featured in Newell Campbell’s geologic road guide (1975) (Fig. H-1). The byway passes through one of the most scenic and geologically interesting areas in Washington. There are tens of volcanic centers that range in age from earliest Miocene to Pleistocene. Late Paleozoic/Mesozoic sedimentary rocks and metamorphic rocks, glacial deposits, and large active landslides are also exposed along the way. The Russell Ranch Formation is exposed near MP 148 along US 12. The Russell Ranch unit includes marine sedimentary and volcanic rocks that are at least in part of Late Jurassic and Early Cretaceous age (~145–130 Ma).  Numerous Quarternary landslide and talus Deposits are also 

From INFORMATION CIRCULAR 107 (Pringle, et al.)

Descrizione

Geobrugg worked with the Washington Department of Transportation assisting them in creating a robust Rolled Cable Net drape. The updated drape included upsized and redundant support rope infrastructure. The support rope and flexible wire rope cable anchors were made of 1-1/8" ropes having 130 kip ultimate strength.  The Rolled Cable Nets (S4-250) being 30 % stronger than the nets being replaced were chosen as they performed well in another nearby installation. Hi-Tech Rockfall Construction, Inc. performed scaling at the site and quickly installed the large Rolled Cable Net panels.

Cliente

Washington State Department of Transportation

Progettazione:

Washington State Department of Transportation

Contraente:

Hi-Tech Rockfall Construction, Inc.

Oggetto protetto

Strada

Protezione dalla corrosione

GEOBRUGG SUPERCOATING

Il contatto locale

Kevin H. Coyle
 

Kevin H. Coyle

Regional Manager Northeast

Sistemi contro il dissesto idrogeologico
Ingegneria idraulica
Geobrugg North America, LLC,3 Beaudet Terr,Columbia CT 06237 / Stati Uniti Regional Manager Northeast

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Saleh Feidi
 

Saleh Feidi

Regional Manager California

Sistemi contro il dissesto idrogeologico
Ingegneria idraulica
Geobrugg North America, LLC,8921 Emperor Ave.,San Gabriel, California 91775 / Stati Uniti Regional Manager California

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John Kalejta
 

John Kalejta

Regional Manager Central US

Sistemi contro il dissesto idrogeologico
Ingegneria idraulica
Geobrugg North America, LLC,3215 67th Avenue Pl,Greeley CO 80634 / Stati Uniti Regional Manager Central US

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Bob Lyne
 

Bob Lyne

Regional Manager Southeast

Sistemi contro il dissesto idrogeologico
Ingegneria idraulica
Geobrugg North America, LLC,8004 Windspray Drive,Summerfield NC 27358 / Stati Uniti Regional Manager Southeast

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Pierce Runnels, Civil Engineer
   

Pierce Runnels

General Manager Geobrugg North America

Sistemi contro il dissesto idrogeologico
Geobrugg North America, LLC,22 Centro Algodones , Civil Engineer General Manager Geobrugg North America

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Tim Shevlin
 

Tim Shevlin

Sales Director

Sistemi contro il dissesto idrogeologico
Geobrugg North America, LLC,Salem OR 97302 / Stati Uniti Sales Director

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