statically stability analysis of a tunnel-a case study hassanlorad mahmoodsalhezadeh hossein-salimi karim
بیشتر بخوانید
gavashan water transfer tunnel with
20km length is a relatively long tunnel that located in the north of kermanshah and south of kurdistan provinces of iran. prediction of this underground structure bahaviour ,
during and after construction had been important due to un-adequate geotechnical data and unknown geomechanical conditions
One of the main problems of the country's construction projects is the lack of sufficient attention to the technical, economic and quality evaluation of the projects. Success
The failure of any project depends on the informed, logical decision of the people and project managers. Choosing the optimal type of non-coplanar intersection
By reducing the amount of delay, it can facilitate the movement of vehicles and improve traffic, environmental, safety and economic indicators.
Evaluation of pavement carrying capacity with FWD device of Sanandaj-Marivan main road (Todar-Shuisheh axis)1- Abdulbasit Fathi 2- Imran Moradi 3- Pejman Alipanah
بیشتر بخوانید
In the latest edition of the Asphalt Paving Regulations of Iran's Roads (Publication No. 234), the improvement plan is carried out using the data of the rise and fall of the FWD device. In this method, the response of the pavement against the incoming load is measured and by performing inverse calculations of the effective modulus of all pavement layers and the effective structural number.
The existing pavement is determined. Factors such as weather conditions, traffic loading and problems caused by implementation affect the structural capacity and pavement performance.
Application and analysis of value engineering in road construction projects1- Abdulbasit Fathi 2- Arman Yarali
بیشتر بخوانید
Value engineering, which is implemented as a group, systematic, functional and creative approach with the aim of improving the value of a project (or a product or a service) by reducing the costs of the project's life cycle and increasing its quality and performance, has proven its capabilities and capabilities in this direction. This technique is a dynamic process that can be fruitful in all stages of the project's life cycle, but The implementation of value engineering requires the interaction of the project's elements and requires serious support from the business sector for success. In today's competitive market, value engineering has proven that it is indeed a reliable risk.
Value engineering is a process that focuses on improving the performance of a product in terms of quality, time and extending the range of functionality without increasing costs. Due to the high cost of road construction projects, it is important to implement value engineering in these projects. In this article, we describe the steps of using this process to save the costs of the bridge construction project.
Effect of fiber type on the behavior of asphalt mixtures1- Hamon Fathi 2- Tina Lamayi 3- Kia Mokhtarpuriani 4- Imran Moradi
بیشتر بخوانید
Asphalt is one of the most widely used coatings due to its durability, repairability and recyclability. Appropriate resistance, insulation and noise reduction have made asphalt mixtures to be used for road surface. Due to the high weight of the equipment and the high number of passes, extreme cold and heat, asphalt pavements need to be reinforced. Adding fibers to the asphalt mixture increases the shear and bending strength. It also increases the durability of the mixture against freezing and thawing cycles.
Iron and steel smelting plant slag is known as a type of waste. The use of this slag in the production of other different products improves their properties. According to the type of application, this slag is classified in different sizes and is widely used as an additive in cement, bitumen, concrete and asphalt. This substance changes the mechanical behavior of the composite materials that are added to them. In this study, the behavior of asphalt mixture in combination with steel slag with ratios of 05 and 155 percent is studied.
Iron and steel smelting plant slag is known as a type of waste. The use of this slag in the production of other different products improves their properties. According to the type of application, this slag is classified in different sizes and is widely used as an additive in cement, bitumen, concrete and asphalt. This substance changes the mechanical behavior of the composite materials that are added to them. In this study, the behavior of asphalt mixture in combination with steel slag with different ratios is studied.Steel slag is used as a substitute for fine and coarse aggregates in the asphalt mixture. The results of the investigation show that the addition of slag as a substitute for coarse and fine aggregate has a greater effect in combination with asphalt mixture than when it is only a substitute for coarse aggregate.
Evaluation of strategies to deal with deterioration of concrete mixtures in sea water1- Hamidreza Rabiei Far 2- Imran Moradi 3- Abdulbasit Fathi 4- Rozhin Ahmadi
بیشتر بخوانید
The damage and breakdown of concrete structures under the influence of corrosive fluids, humid gases, etc. is known as concrete corrosion. Concrete corrosion is a chemical and sometimes physical-chemical process. While the corrosion of reinforced concrete is purely electrochemical. Corrosion of reinforcement due to the influence of chloride ions from the surrounding environment is the most important factor in reducing the useful life of concrete structures built in corrosive environments such as the southern regions of our country. In recent years, in industrialized countries, 50% of the budget Construction is spent on repairing concrete structures. This is the case in Maniz country, although there are no exact statistics
Application and analysis of value engineering in road construction projects1- Abdulbasit Fathi 2- Arman Yarali
بیشتر بخوانید
Value engineering, which is implemented as a group, systematic, functional and creative approach with the aim of improving the value of a project (or a product or a service) by reducing the costs of the project's life cycle and increasing its quality and performance, has proven its capabilities and capabilities in this direction. This technique is a dynamic process that can be fruitful in all stages of the project's life cycle. However, the implementation of value engineering requires the interaction of project elements and requires serious support from the business sector for success. In today's competitive market, value engineering has proven that it is indeed a reliable risk.
