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Behavior of Offshore Pile in Calcareous Sand—Case Study
Faculty
Engineering
Year:
2021
Type of Publication:
ZU Hosted
Pages:
Authors:
Nadia Mostafa Mohamed Mostafa
Staff Zu Site
Abstract In Staff Site
Journal:
Journal of Marine Science and Engineering MDPI
Volume:
Keywords :
Behavior , Offshore Pile , Calcareous Sand—Case Study
Abstract:
The erosion of limestone and calcarenite ridges that existed parallel to the Mediterranean shoreline forms the calcareous sand (CS) formation at the surface layer of Egypt's northern coast. The CS is often combined with broken shells which are considered geotechnically problematic due to their possible crushability and relatively high compressibility. In this research, CS samples collected from a site along the northern coast of Egypt are studied to better understand its behavior under normal and shear stresses. Reconstituted CS specimens with different ratios of broken shells (BS) are also investigated to study the effect of BS ratios on the soil mixture strength behavior. The strength is evaluated using laboratory direct-shear and one-dimensional compression tests (oedometer test). The CS specimens are not exposed to significant crushability even under relatively high-stress levels. In addition, a 3D finite element analysis (FEA) is presented in this paper to study the degradation offshore pile capacity in CS having different percentages of BS. The stress–strain results using oedometer tests are compared with a numerical model, and it gave identical matching for most cases. The effects of pile diameter and embedment depth parameters are then studied for the case study on the northern coast. Three different mixing ratios of CS and BS have been used, CS + 10% BS, CS + 30% BS, and CS + 50% BS, which resulted in a decrease of the ultimate vertical compression pile load capacity by 8.8%, 15%, and 16%, respectively.
Author Related Publications
Nadia Mostafa Mohamed Mostafa, "A TWO-COMPONENT BARRIER SYSTEM TO PROTECT COASTAL REGIONS FROM THE RISING SEA LEVELS", EIJESTThe Egyptian Int. J. of Eng. Sci. and Technology, 2014
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Nadia Mostafa Mohamed Mostafa, "Lateral response enhancement of a conventional offshore monopile using skirts of helical piles and pipe piles with stiffeners", springer, 2021
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Nadia Mostafa Mohamed Mostafa, "Properties of soil–bentonite–cement bypass mixture for cutoff walls", Construction and Building Materials, 2015
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Department Related Publications
Eshak Ibrahiem Eshak Hana, "A Robust Nonlinear Mathematical Programming Model for Design of Laterally Loaded Orthotropic Steel Plates", Structural Engineering and Mechanics, Vol.14, No.2 (2002) 223-236, Techno-Press, Korea., 2002
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Eshak Ibrahiem Eshak Hana, "Technical Inspection of 26 Railway Steel Bridges in Egypt", 4th Alexandria International Conference on Structural and Geotechnical Engineering, Vol.1, Alex. Univ., Alexandria, Egypt, April 2001., 2001
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Eshak Ibrahiem Eshak Hana, "Distribution of Longitudinal Stresses in Box Girder Bridges Subjected to Unsymmetrical Vertical Loading", 1st Egyptian Structural Eng. Conference, Cairo Univ., Vol 3, April 1985., 1985
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Ehab Boghdady Hana Mattar, "BEHAVIOR OF AXIALLY LOADED STEEL COLUMNS WITH SLENDER STEEL SECTIONS", لايوجد, 1900
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Rania Mohamed Samier Mohamed Kamal Amien, "Control of Structures using Active Tuned Mass Damper", لايوجد, 1900
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