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The subsurface development and geological and geotechnical characteristics of coarse-grained sediments of Zayandeh rood river in Isfahan city

Document Type : Original Research Paper

Authors

1 Ph.D.Student, Department of Applied Geology, Faculty of Earth Science, Kharazmi University, Tehran, Iran

2 Professor, Department of Applied Geology, Faculty of Earth Science, Kharazmi University, Tehran, Iran

3 Assistant Professor, Department of Applied Geology, Faculty of Earth Science, Kharazmi University, Tehran, Iran

4 Associate Professor, School of Geology, College of Science, University of Tehran, Tehran, Iran.

Abstract

Description and Understanding the sedimentary environment helps a lot in the initial estimation of the engineering properties of materials and planning of geotechnical studies. Most of the quaternary sediments (coarse and fine grained) of the Isfahan city were deposited by the Zayandehrood river. Understanding the geotechnical characteristics and subsurface development of these sediments are essential in the old sedimentary environment for a couple of reasons. Firstly, it is difficult to determine the geotechnical characteristics of coarse-grained sediments and there is uncertainty in the subsurface development of these sediments at distant locations from the Zayandehrood river. Secondly, it is development of construction and the necessity of digging underground spaces Therefore, in this study, using the geotechnical data of 384 boreholes, maps of the approximate range of coarse-grained sediments of the Zayandehrood River were prepared at depths of 5, 10, 20 and 30 m and their geotechnical characteristics were statistical analyzed by the results of laboratory and in situ tests. The results show that the geotechnical characteristics of coarse-grained sediments do not change significantly with the change of depth and the approximate range of subsurface expansion of this river has been in the past in places other than the present river route.

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References
 
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Scientific Quarterly Journal of Geosciences
Volume 30, Issue 117
Volume 30, Issue 3, Serial Number 117, Autumn 2020
December 2020
Pages 231-242
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