Geotechnical Characteristics of Liquefaction in Shahid-Rajaei Port Site (Bandar Abbas, Hormozgan Province) by Using GIS

Document Type : Original Research

Authors

1 Department of Geology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran

2 Department of Geology, Kahnooj Branch, Islamic Azad University, Kahnooj, Iran

3 Department of Geology, Zahedan Branch, Islamic Azad University, Zahedan, Iran

10.30495/geotech.2021.689419

Abstract

One of the seismic geotechnical phenomena is the occurrence of liquefaction in soil layers. This phenomenon occurs in non-dense saturated silty sandy sediments in which the saturated soil completely loses its strength and hardness due to the intense stress applied to it and behaves like a liquid. This stress can be due to earthquakes or sudden changes in soil stress. In this case, the shear strength of the soil is zero and it loses its bearing capacity. Soil liquefaction resistance can be determined by laboratory and field methods. The main purpose of this study is to determine the liquefaction potential zoning and the amount of sedimentation due to liquefaction based on the standard penetration resistance test (SPT) using the method of Sied et al. (1983) in Shahid-Rajaei wharf, Bandar Abbas located in Hormozgan province. In the present study area, 304 boreholes were drilled, according to the type of soil and the groundwater level. The results show that the average NSPT in the region is equal to 35 and the highest percentage of soils in the region based on Unified classification in SM category and according to the zoning status, the degree of liquefaction varied at different depths and according to the liquefaction index, the amount of subsidence in different sections is determined so that the maximum amount will be in the southern part of the port.

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