Quaternary Journal of Iran

The origin of the rocks of Chalus road, active tectonics or Quaternary climate

Document Type : Original Article

Authors

Mohsen Pourkermani 1
Iman Labaf Tehrani 2
Mahmoud Almasiyan 3
Soheila Bouzari 4
Mohammad Reza Jafari 4

1 Islamic Azad University

2 Earth science department, faculty of Science, Islamic Azad University, north Tehran Branch, Tehran, Iran

3 Islamic Azad University, North Tehran Branch

4 Earth Science Department, Islamic Azad University, North Tehran Branch, Tehran, Iran

https://doi.org/10.22034/irqua.2023.2006347.1004
Abstract
Chalus Road, as one of the main axes of communication between the north and south of Central Alborz, has always witnessed the occurrence of numerous rockfalls and this causes countless damages. In this article, the method of dispersion and the reasons for the occurrence of these spills are investigated. For this purpose, the method of risk zoning of rock fall using rock engineering factors has been used. The results show that between the Karaj Dam and the beginning of the urban area, there are at least nine main areas where rock falls affect the road axis. Asara shales, middle tuff member, and Quaternary units respectively have the highest amount of rockfall origin. Except for some areas, there is no defined connection between the tectonic fracture zones and the starting points of rockfalls. Statistical studies show that most landslides occur at the end of winter and the beginning of spring. Regardless of the fact that tectonics has caused the fragmentation of the rock units of the region, the time of occurrence of the events shows their direct relationship with the Quaternary climate. It is suggested that the road department implement stability systems and rockfall control in identified high-risk areas in order to prevent future disasters

Chalus Road, as one of the main axes of communication between the north and south of Central Alborz, has always witnessed the occurrence of numerous rockfalls and this causes countless damages. In this article, the method of dispersion and the reasons for the occurrence of these spills are investigated. For this purpose, the method of risk zoning of rock fall using rock engineering factors has been used. The results show that between the Karaj Dam and the beginning of the urban area, there are at least nine main areas where rock falls affect the road axis. Asara shales, middle tuff member, and Quaternary units respectively have the highest amount of rockfall origin. Except for some areas, there is no defined connection between the tectonic fracture zones and the starting points of rockfalls. Statistical studies show that most landslides occur at the end of winter and the beginning of spring. Regardless of the fact that tectonics has caused the fragmentation of the rock units of the region, the time of occurrence of the events shows their direct relationship with the Quaternary climate. It is suggested that the road department implement stability systems and rockfall control in identified high-risk areas in order to prevent future disasters

Chalus Road, as one of the main axes of communication between the north and south of Central Alborz, has always witnessed the occurrence of numerous rockfalls and this causes countless damages. In this article, the method of dispersion and the reasons for the occurrence of these spills are investigated. For this purpose, the method of risk zoning of rock fall using rock engineering factors has been used. The results show that between the Karaj Dam and the beginning of the urban area, there are at least nine main areas where rock falls affect the road axis. Asara shales, middle tuff member, and Quaternary units respectively have the highest amount of rockfall origin. Except for some areas, there is no defined connection between the tectonic fracture zones and the starting points of rockfalls. Statistical studies show that most landslides occur at the end of winter and the beginning of spring. Regardless of the fact that tectonics has caused the fragmentation of the rock units of the region, the time of occurrence of the events shows their direct relationship with the Quaternary climate. It is suggested that the road department implement stability systems and rockfall control in identified high-risk areas in order to prevent future disasters

Chalus Road, as one of the main axes of communication between the north and south of Central Alborz, has always witnessed the occurrence of numerous rockfalls and this causes countless damages. In this article, the method of dispersion and the reasons for the occurrence of these spills are investigated. For this purpose, the method of risk zoning of rock fall using rock engineering factors has been used. The results show that between the Karaj Dam and the beginning of the urban area, there are at least nine main areas where rock falls affect the road axis. Asara shales, middle tuff member, and Quaternary units respectively have the highest amount of rockfall origin. Except for some areas, there is no defined connection between the tectonic fracture zones and the starting points of rockfalls. Statistical studies show that most landslides occur at the end of winter and the beginning of spring. Regardless of the fact that tectonics has caused the fragmentation of the rock units of the region, the time of occurrence of the events shows their direct relationship with the Quaternary climate. It is suggested that the road department implement stability systems and rockfall control in identified high-risk areas in order to prevent future disasters

Keywords

Rock Fall
Chalus Road
Karaj Dam
Quaternary
Climate
Subjects
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Quaternary Journal of Iran
Volume 9, 1,2
September 2023
Pages 1-13

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