Clarification on the Methodology of Calculation of Seismic Lateral Earth Pressure in Cohesive Soils Mehdi Jalili PhD student, School of Civil Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran e-mail: jalili@iust.ac.ir Iraj Rahmani Assistant professor of Maritime Transportation & Technology Group, Transportation Research Institute, Tehran, Iran e-mail: Rahmani@rahiran.ir Hamid Alielahi Islamic Azad University, Zanjan Branch, Zanjan, Iran H. Ghiassian Associate Professor, School Of Civil Engineering, IRAN University of Science and Technology, Narmak, Tehran, Iran
			ABSTRACT

This paper presents a clarification for two inconsistencies in lateral earth pressure calculations. First problem is the inconsistency of the methodology of seismic lateral earth pressure calculation for soils based on Mononobe-Okabe for Undrained Unconsolidated clayey soils. The solution of this problem is described based on an analytical-graphical method. In calculations, the soil properties of Shahid Rajaee Port Project situated on shores of Persian Gulf near Bandar Abbas, in south of Iran are used as a case history. Second, the clarification on using effective soil unit weight (?') in highly permeable and low permeable soils is described.

Keywords: Earth pressure; cohesive soils, seismic condition, pseudo-static

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