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Steinschlagschutz - Karaj Hafez Square 2017

Barriers installed and protecting the road from future rockfall events

Steinschlagschutz - Karaj Hafez Square 2017

Google earth location of the square and road that needed protection

Steinschlagschutz - Karaj Hafez Square 2017

Hafez square and potential rock fall zones

Steinschlagschutz - Karaj Hafez Square 2017

Example of a rockfall event before any barrier was installed

Steinschlagschutz - Karaj Hafez Square 2017

Site engineers and Geobrugg specialists discussing site stake-out plans

Steinschlagschutz - Karaj Hafez Square 2017

Drilling on the slope is performed using a mobile crane

Steinschlagschutz - Karaj Hafez Square 2017

Drilling the anchors from the basket

Steinschlagschutz - Karaj Hafez Square 2017

Lower weights of barriers help quicker installation

Steinschlagschutz - Karaj Hafez Square 2017

Mobile crane lifting the pre-assembled post for placement on the slope.

Steinschlagschutz - Karaj Hafez Square 2017

Barriers are installed in three separate lines. Each line is installed with the nets pre-assembled to the post.

Steinschlagschutz - Karaj Hafez Square 2017

Pre-assembled posts are installed over the first berm

Steinschlagschutz - Karaj Hafez Square 2017

Pre-assembled components, e.g. nets supplied pre-installed on the posts, speed up the installation process

Steinschlagschutz - Karaj Hafez Square 2017

Adjusting the barriers with up-slope ropes and the secondary mesh

Steinschlagschutz - Karaj Hafez Square 2017

Installed barriers on the slope protecting the area of Hafez Square

Steinschlagschutz - Karaj Hafez Square 2017

Installed barrier protecting the road against rockfall

Steinschlagschutz - Karaj Hafez Square 2017

Installed barriers in three GBE-2000 lines: 1) 200 meters 2) 220 meters 3) 220 meters, totaling 640 meters

 

Systeme

 

Systemlänge

200 m - 220 m

 

Installationsjahr

2017

Ausgangslage

Karaj, a growing city, has roots in Alborz mountains and therefore is faced with challenges such as rockfall which are not typical for cities in Iran. Hafez Square which is a corridor to the city as well as to a major transit road to North of Iran (Chalous Road) is located in the mountain area. As a corridor, it is a major stop to public transportation and private cars. Many tourists also start their travel plans to the Caspian sea from this square. Over the years, weathering of the rocks in the mountain have been rising and consequently, rockfalls have happened on the road. Due to cars and buses stopping in this major square, there have been incidents of rockfall damaging properties and unfortunately, in some cases, fatalities have occurred. The Karaj municipality had to find a solution in order to stop the events from happening. The consultant got involved and performed geotechnical studies as well as rockfall simulations in order to find an optimal solution.

Massnahme

The consultant got involved with the project and asked Geotech to provide its expertise for this phase. Based on prior rockfall incidents, the current topography of the slope, and scanning of boulders in different areas, design boulder was chosen. The rough area to be protected was 700 meters and after final analysis, it was divided into three barrier lines totaling 640 meters. An energy classification of 2000 kJ and a barrier height of 5 meters were selected. Thie installation was performed in two phases - in a total time of 9 months for the entire area. Grouting of the anchors was a challenge due to the cold weather conditions in the winter time but with proper planning, the entire project was finished ahead of schedule.

Kunde

Karaj Municipality

Ausführende Firma

Geotech Company

Geschützte Objekte

Strasse

Korrosionsschutz

GEOBRUGG SUPERCOATING

Planer

Rahab Consulting Engineers

Ansprechpartner

Kevin H. Coyle
 

Kevin H. Coyle

Regional Manager Northeast

Naturgefahren
Uferschutz/Wasserbau
Geobrugg North America, LLC,3 Beaudet Terr,Columbia CT 06237 / USA Regional Manager Northeast

E-Mail

Saleh Feidi
 

Saleh Feidi

Regional Manager California

Naturgefahren
Uferschutz/Wasserbau
Geobrugg North America, LLC,8921 Emperor Ave.,San Gabriel, California 91775 / USA Regional Manager California

E-Mail

John Kalejta
 

John Kalejta

Regional Manager Central US

Naturgefahren
Uferschutz/Wasserbau
Geobrugg North America, LLC,3215 67th Avenue Pl,Greeley CO 80634 / USA Regional Manager Central US

E-Mail

Bob Lyne
 

Bob Lyne

Regional Manager Southeast

Naturgefahren
Uferschutz/Wasserbau
Geobrugg North America, LLC,8004 Windspray Drive,Summerfield NC 27358 / USA Regional Manager Southeast

E-Mail

Pierce Runnels, Civil Engineer
   

Pierce Runnels

General Manager Geobrugg North America

Naturgefahren
Geobrugg North America, LLC,22 Centro Algodones,NM 87001 Algodones / USA , Civil Engineer General Manager Geobrugg North America

E-Mail

Tim Shevlin
 

Tim Shevlin

Sales Director

Naturgefahren
Geobrugg North America, LLC,Salem OR 97302 / USA Sales Director

E-Mail