Location
Arlington, Virginia
Date
14 Aug 2008, 4:30pm - 6:00pm
Abstract
Vanyar dam is located near Tabriz city, North West of Iran. The side channel overflow spillway of this dam is located on the left side of dam body with discharge capacity of 1330 m3/sec. To construct this spillway a soil-rock slope with height of maximum 140m is excavated. After about three years, some surface cracks and slides started to develop. This research tries to study the reasons of these instabilities and some approaches are presented to stabilize the slope. This slope is located on too weathered and crushed igneous rocks and weak sandstones. The field studies indicated that the most important reasons of these instability events were rainfall penetration, weathering, freezing and melting cycles, static and dynamic loading conditions, increase in slope height, tectonic conditions and shotcrete covering. To stabilize the slope meanwhile doing back analysis, many methods evaluated and considering to advantages and disadvantages of each method and available equipment, some approaches such as: adjustment of the slope gradients, improvement of drainage system, construction of retaining structure, vegetation and stabilizing instable parts of rocks are recommended as remedy works in this case.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
6th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2008 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Sadeghpour, A.; Asgari, J.; and Mojezi, M., "Study of Instability Event of Rock Trench in Vanyar Dam Spillway" (2008). International Conference on Case Histories in Geotechnical Engineering. 54.
https://scholarsmine.mst.edu/icchge/6icchge/session02/54
Study of Instability Event of Rock Trench in Vanyar Dam Spillway
Arlington, Virginia
Vanyar dam is located near Tabriz city, North West of Iran. The side channel overflow spillway of this dam is located on the left side of dam body with discharge capacity of 1330 m3/sec. To construct this spillway a soil-rock slope with height of maximum 140m is excavated. After about three years, some surface cracks and slides started to develop. This research tries to study the reasons of these instabilities and some approaches are presented to stabilize the slope. This slope is located on too weathered and crushed igneous rocks and weak sandstones. The field studies indicated that the most important reasons of these instability events were rainfall penetration, weathering, freezing and melting cycles, static and dynamic loading conditions, increase in slope height, tectonic conditions and shotcrete covering. To stabilize the slope meanwhile doing back analysis, many methods evaluated and considering to advantages and disadvantages of each method and available equipment, some approaches such as: adjustment of the slope gradients, improvement of drainage system, construction of retaining structure, vegetation and stabilizing instable parts of rocks are recommended as remedy works in this case.
