Study of Dynamic Mechanical Properties for Urban Purposes: Alamein Area in Western Desert (Egypt)
2024
El Sayed,Abdel Moktader A | Mohammed,Ahmed O. K. | Sayed,Nahla A. El
The Northwestern part of Egypt is considered as a promising area for several national urban projects like the New El-Alamein City and El-Dabaa nuclear project. The main issue for any urban project is to measure and evaluate the degree of stability of the bedrock for these buildings. El-Alamein area lies in the Northern portion of the Western Desert; about 100 km west of Alexandria city. The New El-Alamein city is considered as an important new urban extension of the Northwestern part of Egypt. In the present work, thirty-two rock samples were collected from some shallow boreholes, representing a great part of the Marmarica Formation (Miocene). These samples were subjected to numerous laboratory measurements such as porosity, permeability, electrical resistivity, sonic wave velocity and dynamic mechanical properties. These laboratory measurements were conducted at Ain Shams University’s petrophysical lab. (PRU), the Egyptian Petroleum Research Institute (EPRI), and the British University in Egypt (BUE). The measured petrophysical parameters for the Miocene (Limestone) rocks, presented by the Marmarica Formation in New El-Alamein City show many fundamental rock properties. The sedimentological features of the Miocene limestone rocks were investigated using several thin sections to detect petrographical features and diagenesis. Some relationships between different elastic moduli and petrophysical properties were constructed to detect the different rock types based on material competence scales and material bearing Capacity. The material competence scales of the studied Middle Miocene limestone rocks show a very good relationship with Poisson's ratio and velocity ratio. It ranges from weak to moderately competent. Depending on the ultimate bearing capacity the Middle Miocene limestone rocks are considered medium-weak to medium-hard rocks.
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