S.A. Amid; S. Allahyaribeik
Volume 5, Issue 2 , June 2015, , Pages 55-64
Abstract
Steel-structured jacket or template platforms have been extensively installed in Persian Gulf offshore oil & gas fields. For the jackets in the water depth range of 40 meters in this region, utilizing the self-upending concept has been investigated. It has been concluded that designing the light ...
Read More
Steel-structured jacket or template platforms have been extensively installed in Persian Gulf offshore oil & gas fields. For the jackets in the water depth range of 40 meters in this region, utilizing the self-upending concept has been investigated. It has been concluded that designing the light weight jackets, implementing the self-upending process for their installation operations, are economically and practically more convenient than the usual crane-assisted up-ending methods. Two methods of self-upending for light weight jackets have been presented in this paper .in first method self-upending is implemented without using ballast systems and in second model self-upending is implemented with ballast systems .Considering the required number of new installations for the “new” as well as “brown-bag” projects, and considering the existing problems and difficulties for the available marine spread, especially ready-to-work heavy floating cranes, utilizing this concept in the offshore industry for light weight jackets seems to be a considerable break-through
M. Heydari; S. Allahyaribeik
Volume 5, Issue 2 , June 2015, , Pages 93-98
Abstract
The process of erosion and desertification affects social communities, agricultural lands and natural resources in coastal areas. The rapid coastline changes would cause social and economic issues in the coastal areas. In this study, Miankaleh coasts and the eastern coastlines of Amirabad port have been ...
Read More
The process of erosion and desertification affects social communities, agricultural lands and natural resources in coastal areas. The rapid coastline changes would cause social and economic issues in the coastal areas. In this study, Miankaleh coasts and the eastern coastlines of Amirabad port have been surveyed due to existing benchmarks since June 2013 until December 2015 in order to analyze the coastline changes in Amirabad port. Then the surveyed lines were compared with sea levels at the time of surveying. The sea level data has been used (to calculate the beach slope) in order to monitor the sedimentation and erosion processes in the coastlines movements. The results of this comparison show that coastline changes are irregular and they may not follow the seal level changes. Therefore the coastline changes in these areas are influenced by erosion and sedimentation units.
P. . Atabak; S. Allahyaribeik; F. Azarsina
Volume 4, Issue 2 , June 2014, , Pages 57-64
Abstract
This study aims to examine the performance of the rock materials in the protective layer of rubble-mound breakwaters in southern Iran, from Rostami Port in Bushehr Province to Beris Port in Sistan and Baluchestan Province. Field inspections were carried out on a great number of rubble-mound breakwaters ...
Read More
This study aims to examine the performance of the rock materials in the protective layer of rubble-mound breakwaters in southern Iran, from Rostami Port in Bushehr Province to Beris Port in Sistan and Baluchestan Province. Field inspections were carried out on a great number of rubble-mound breakwaters built in the Persian Gulf and Oman Sea coastal regions to study the protective layer of these breakwaters under ambient conditions as well as to detect the damage caused by factors affecting the failure of the used materials. Subsequently, samples were taken from these rock materials, the specimens were tested in accordance with various quality assessment criteria, and the results were compared with those obtained from international standard tests. The obtained results showed that in most cases, the physical and chemical properties of the local rock materials did not meet standard requirements. As such, these materials are not recommended for use in the construction of breakwaters. In practice, however, these rocks exhibit an acceptable performance in certain cases depending on the position of each rock group in the structure of the breakwater. For this reason, design, construction, and structural considerations can somehow influence the performance of these rock materials in the respective marine structures.
N. . Allahyaribeik; S. Allahyaribeik
Volume 4, Issue 2 , June 2014, , Pages 101-106
Abstract
In recent years, the application of Activity-Based Costing in Port industry has been deeply researched in theory and practice, but researchers only concentrate on the bulk and general cargo’s ABC in loading and unloading operations and there is little about the liquids and chemicals’. Based ...
Read More
In recent years, the application of Activity-Based Costing in Port industry has been deeply researched in theory and practice, but researchers only concentrate on the bulk and general cargo’s ABC in loading and unloading operations and there is little about the liquids and chemicals’. Based on the liquids and chemicals’ handling process and the particularity of their cost accounting, the paper establishes quality and safety activity center, steam heating, electric trace heating activity center, temperature maintenance activity center and so on .At the same time, the paper focuses on their cost drivers and their measuring method in order to improve the accuracy of costing in loading and unloading operations.