The Role of Faults on Tehran Alluvial and Its Impact on Resistance of Alluvial
- 1 Islamic Azad University, North Tehran Branch, Tehran, Iran
- 2 Islamic Azad University, North Tehran Branch, Tehran, Iran
- 3 Tectonic Group, Islamic Azad University, Tehran, Iran
Abstract
Tehran is located in the Alborz’s mountain range subsidence and alluvial deposits which are formed in the different faults. Though these faults caused changes in Northern Tehran’s alluvium. The geomechanics factors on these alluviums made northern area of Tehran a dangerous place to construct. In this article we have tried to determine the zone’s resistance [1] , critical depth in excavation and in the end the role of faults in mechanical resistance of alluvium by comparing several pits in the zone of fault or the zone with no fault. For this purpose, the impact of the neighboring building on the pit stability has been investigated in several locations in some part of coarse alluvium of northern Tehran. So engineering methods such as numerical method and limit equilibrium with the help of software like FLAC and SLIDE were used to determine alluvium’s resistance and the critical depth of excavation. It was done in a way that several pits were analyzed and evaluated in the studied area to a depth of 20 meters in the unloaded state of the neighboring buildings, and once even the load of a neighboring 5-storey building placed at a distance of 3 meters from the edge of the considered pit was analyzed and the results were compared.
- Imanzadeh, J. (1389) Sustainability Analysis and Presentation of Excavation Pattern in Fine Grained Alluvial Soils of Tehran. Journal of Science, University of Tehran.
- Berberian, M., Jackson, J.A., Qorashi, M., Khatib, M.M., Priestley, K., Talebian, M. and Ghafuri-Ashtiani, M. (1999) The 1997 May 10 Zirkuh (Qaenat) Earthquake (Mw 7.2): Faulting along the Sistan Suture Zone of Eastern Iran. Geophysical Journal International, 136, 671-694. https://doi.org/10.1046/j.1365-246x.1999.00762.x
- Terzaghi, K. (1967) Soil Mechanics in Engineering Practice. Wiley, New York, 497-523.
- Ghanbari, A. (1386) Study of the Modulus of Soil Elasticity in Alluvial South of Tehran. The Research Project Presented to the Research Vice-President of Tarbiat Moalem University of Tehran.
- Bishop, A.W. (1955) The Use of the Slip Circle in the Stability Analysis of Slope. Geotechnique, 10, 129-150. https://doi.org/10.1680/geot.1955.5.1.7
- Djamour, Y., et al. (2010) GPS and Gravity Constraints on Continental Deformation in the Alborz Mountain Range, Iran. Geophysical Journal International, 183, 1287-1301. https://doi.org/10.1111/j.1365-246X.2010.04811.x
- Rieben, E.H. (1966) Geologocal Observation on Alluvium Deposits in Northern Iran. Geological Organization of Iran, Report No. 9, 39.
- Rieben, H. (1955) The Geology of the Tehran Plain. American Journal of Science, 253, 617-639. https://doi.org/10.2475/ajs.253.11.617
- Engalenc, M. (1968) Contribution a la Geologie, Geomorphologie, Hydrologie de la Region de Tehran (Iran). C.E.R.H., 365 p.
- Habibi, M. (1385) Study of Mechanical Properties of Coarse Alluvial Deposits of Tehran Based on Usual Tests and Simple Mechanical Tools. PhD Thesis of Engineering Geology.
- Hosseini, A. (1389) Excavation near the Neighboring Building. Master’s Thesis.
- Aghanabati, A. (1385) Geology of Iran. Third Print, 580 p.
- De Martini, P.M., Hessami, K., Pantosti, D., D’Addezio, G., Alinaghi, H. and Ghafory-Ashtiani, M. (1998) A Geologic Contribution to the Evaluation of the Seismic Potential of the Kahrizak Fault (Tehran, Iran). Tectonophysics, 287, 187-199.
- Nasekhian, A. (1388) Studying the Behavior of Diagonal Cavities in Conventional Recruiting in Tehran. Master’s Thesis.
- Amini, M. (1373) Geotechnical Properties of Quaternary Sediments in Tehran Plain. Proceedings of the First International Quaternary Symposium, University of Tehran.