Amerika Birleşik Devletleri
Amerika Birleşik Devletleri

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Kaya düşmesine karşı koruma - Karaj Hafez Square 2017

Barriers installed and protecting the road from future rockfall events

Kaya düşmesine karşı koruma - Karaj Hafez Square 2017

Google earth location of the square and road that needed protection

Kaya düşmesine karşı koruma - Karaj Hafez Square 2017

Hafez square and potential rock fall zones

Kaya düşmesine karşı koruma - Karaj Hafez Square 2017

Example of a rockfall event before any barrier was installed

Kaya düşmesine karşı koruma - Karaj Hafez Square 2017

Site engineers and Geobrugg specialists discussing site stake-out plans

Kaya düşmesine karşı koruma - Karaj Hafez Square 2017

Drilling on the slope is performed using a mobile crane

Kaya düşmesine karşı koruma - Karaj Hafez Square 2017

Drilling the anchors from the basket

Kaya düşmesine karşı koruma - Karaj Hafez Square 2017

Lower weights of barriers help quicker installation

Kaya düşmesine karşı koruma - Karaj Hafez Square 2017

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

Kaya düşmesine karşı koruma - Karaj Hafez Square 2017

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

Kaya düşmesine karşı koruma - Karaj Hafez Square 2017

Pre-assembled posts are installed over the first berm

Kaya düşmesine karşı koruma - Karaj Hafez Square 2017

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

Kaya düşmesine karşı koruma - Karaj Hafez Square 2017

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

Kaya düşmesine karşı koruma - Karaj Hafez Square 2017

Installed barriers on the slope protecting the area of Hafez Square

Kaya düşmesine karşı koruma - Karaj Hafez Square 2017

Installed barrier protecting the road against rockfall

Kaya düşmesine karşı koruma - Karaj Hafez Square 2017

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

 

Sistemler

 

Sistem uzunluğu

200 m - 220 m

 

Kurulum Yılı

2017

Durum

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.

Açıklama

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.

Müşteri

Karaj Municipality

Yüklenici

Geotech Company

Gösterilen obje

Road

Korozyon koruması

GEOBRUGG SUPERCOATING

Mühendislik

Rahab Consulting Engineers

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