Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

Seismic geotechnical Properties of South Tehran alluviums

Document Type : Original Research Paper

Authors
Mohammad Kazem Jafari 1
Mohammad Keshavarz Bakhshayesh 1
Abdollah Sohrabi 1
Arash Razmkhah 2, 1
1 International Institute of Earthquake Engineering and Seismology, Tehran, Iran
2 Department of Civil Engineering, Islamic Azad University, Science & Research Branch, Tehran, Iran
Abstract
Despite of different studies performed on Tehran geological condition, the geotechnical and dynamic properties of Tehran alluviums are not investigated in detail. In this study the authors have tried to get more detail information about south Tehran alluviums by compiling the data from 700 boreholes and 66 seismic profile investigations. The defined 15 two dimensional E­W seismic geotechnical profiles by the distance of 1km present the geotechnical and dynamic properties of the south Tehran alluviums. Based on these sections the depth of the seismic bedrock increases from north to the south. In addition, it is demonstrated that S wave velocity variation in the study area follows the difference of soil type observed in the presented sections. It seems that the local changing of the water table and the seismic bedrock depth could be related to North-Ray fault and Punakhzad fault effects.
Keywords
Tehran's Alluviums
Microzonation
Shear Wave Velocity
2-D Sections

Subjects

Abbassi, M. R. and Shabanian, B, E., 1977-Evaluation of the stress field in Tehran region during the Quaternary, Proceeding of SEE- 3 PP. 67-84.
Ishihara, K., Ansal, A. M. 1982-Dynamic behavior of soil, soil amplification and soil structure interaction, Final Report for Working Group D, UNDP/ UNESCO Project on Earthquake Risk Reduction in the Balkan Region.
Japan Working Group TC-4 Committee, 1992- Seismic Zoning on Geotechnical Hazards, Draft Report LNEC, Lisbon, Portugal.
Scientific Quarterly Journal of Geosciences
Volume 12, 45-46
Autumn & Winter 2003, Vol. 12, No. 45-46
Winter 2002
Pages 92-104