Engineering Geology

Engineering Geology

Evaluation of the Liquefaction Potential of Bustano Beach (West of Bandar Abbas) based on Standard Penetration Test (SPT) and Risk Zoning

Authors
Hamzeh Torkamanitombeki 1
Mashalah Khamehchiyan 1
Maryam Nazari 2
Shazdi Safari 3
1 Tarbiat Modares University
2 Azad University, Bandar Abbas Branch
3 Hormozgan University
10.22034/JEG.2023.17.3.1019051
Abstract
The purpose of the research is to investigate the risk of liquefaction risk at the beaches of Bustano in the western part of Bandar Abbas in Hormozgan province. The periodic stress method was used as the method to evaluate the liquefaction potential based on the data obtained from Standard Penetration Test (SPT). The acceleration of 0.35 g was chosen as the maximum acceleration of the bedrock, and cross sections were extracted using Rockwork software. From an engineering geological point of view, the characteristics of the sedimentary deposits and the collected geotechnical information were analyzed to generate geotechnical index profiles. As the study area is located at the edge of the folded Zagros, seismically it has the characteristics of the Zagros-Makran transition zone which basically exerts the most pressure on the saturated sediments of the area. Due to the strong movement of the earth in generating liquefaction, the seismic bedrock acceleration (PGA) and the maximum horizontal acceleration at the ground surface (amax) were evaluated by liquefaction analysis using LiqIT v.4.70 software. The results indicate that the sandy and silty sediments of the study area are the outcome of the weather changing processes at the northern altitudes of the region. Granular sand and silt sediments were found under favorable conditions with high groundwater level, confirming the presence of liquefaction phenomenon in the area. Zoning maps of the intensity of liquefaction were extracted at the surface and at depth were obtained in different parts of the Bustano, indicating the different classes of risk of liquefaction in the soil of this area. In general, the occurrence of liquefaction with high intensity liquefaction was predicted for the Bustano area.
Keywords
Standard penetration test
Bustano
risk zoning
Liquefaction
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