Retaining wall design and soil improvement methods
The choice of the appropriate method for the implementation of the guard structure can be in different situations, in various ways based on theoretical principles and also influenced by practical, experimental and optimization considerations.
Having a competent surveying team (with work experience in similar projects) is required. The use of appropriate monitoring methods based on the dimensions of the project (free station, micro geodesy and instrumentation) is mandatory.
According to the definition of bidding law, bidding is a competitive process to provide the desired quality (according to the bidding documents), in which the subject-matter obligations are offered to the bidder who has the lowest “appropriate” price.
Monitoring the implementation, consulting and plan controlling
Short-term and long-term performance monitoring and quality of materials are monitored to evaluate the performance of stabilization systems. An employer representative, consultant, or a combination of both can inspect the construction of the wall.
Site inspection and laboratory tests are two of the most critical aspects of any construction and mining project and have a direct impact on the technical feasibility and optimization of project costs.
Reinforced soil is a collection of embankments (usually granules) in which the reinforcing elements in the soil, in the form of belts, are rebars. Reinforced soil is generally resistant to pressure and shear, but weak to traction. In reinforced soil, the presence of reinforcing elements in the direction of tensile strain improves soil behavior.
Reinforcement strategies for foundation and in fact soil improvement under the foundation is one of the main problems in the construction of structures. With the increase in population and the observation of damages caused by earthquakes and other natural factors, this problem and the human need to create strong and durable structures and to strengthen and improve old structures has become more and more widespread.
The principles of implementation of the restraint or anchorage method have many similarities with the nailing method. The main difference is in the application of post-tension force to the reinforcing element. Execution steps are similar to the nailing method and include cross-sectional excavation, borehole drilling, reinforcement installation, and.
Nailing was a creative technique used by Australian engineers to stabilize tunnel walls. After that, the use of nailing was used in various construction projects such as stabilization of railway trenches and highways, construction of excavated guard structures in the areas.
Piles are generally divided into two main groups: displacement piles and replacement piles. Micropiles are small replacement piles (usually less than 300 mm in diameter) that are often accompanied by light steel reinforcement and cement grout injection.
+Project Description: Design, and operation of wall stabilization by anchorage and nailing methods and floating pile +Employer Name: Mr. Ahmad Mohaghegh +Date of implementation: June 2020 +Project location: Tehran,
+Project Description: Excavation, design, and operation of wall stabilization by construction and installation of screw steel structures by top-down method and permanent drainage of the project +Employer Name:
+Project Description: Design, and operation of wall stabilization by nailing method, concrete piles, and truss structure +Employer Name: Mr. Aghamohammadi +Date of implementation: September 2020 +Project location: Tehran,
+Project Description: Excavation, design, and operation of wall stabilization by anchorage method +Employer Name: Deputy of Civil Engineering of Ayatollah Sistani Cultural Institute (Modzaleh) +Date of implementation: February
+Project Description: Excavation, design, and operation of wall stabilization by anchorage method and the making of reinforced berms and installation of structural columns by top-down method +Employer Name:
+Project Description: Design, and operation of wall stabilization by concrete piles and nailing methods and permanent drainage +Employer Name: Sahih Al-Nasab Engineers Group +Date of implementation: June 2019
Project Description: Operations of bed consolidation and foundation strengthening by bearing micropile method Employer Name: Sahih Al-Nasab Engineers Group Date of implementation: March 2019 Project location: Tehran, Elahieh,
First, the project site is visited by the company’s personnel and technical information and documents such as topography of the current situation and neighborhoods, report of soil mechanics studies, and architectural plans or structures and criteria of the employer for the project are collected.
After reviewing the information obtained and performing the design operation of phase one in the technical office of Peyban company, in order to manage time and plan correctly during a joint meeting with the employer, the existing advice and solutions will be provided and the best method will be proposed.
Complementary soil mechanics studies
The use of additional soil mechanics studies, which mainly focus on the correct and correct execution of on-site tests, significantly reduces project implementation costs and increases safety.
Execution of various types of lateral protection systems of pits and stabilization of pits (guard structure) including nailing, anchorage, truss, mutual restraint, Berlin wall, micropile, concrete and metal top box, etc. with experienced personnel and up-to-date equipment
During and after the completion of the geotechnical operations of the project, whether in the methods of sewing on the back or in the methods of guard structure or top down, conducting systematic monitoring and analyzing the results has a significant contribution in ensuring safety.
Dear employers’ opinion about Peyban
I am Ghotbizadeh, Executive Manager of Sepidar Project, Jordan Street, our digging depth was close to 17 meters. The north and south sides are the nailing and anchorage system, the east and west sides are the truss system, the movements are within the allowable and standard level. Peyban Engineering Technical Company finished our work, safely. Thank you very much.
Mr. Ghotbizadeh, Jordan Sepidar Poject
In the name of God, Considering the difficulty of excavation and stabilization processes in urban environments, selecting a capable contractor is a very significant issue. We entrusted the design, stabilization and excavation processes of the Mirdamad North Razan project to the Peyban group under the management of Dr. Majid Mohagheghi. Peyban Co. continued the project phases including the construction and installation of guard structures, panel removal, shotcrete, and excavation with regular planning. Finally, the 14.5-meter excavation process of the project was completed in the shortest possible time but with the best quality
Mr. Kelayeh, Mirdamad North Razan project
In the name of God. I’m glad to have the opportunity to explain about Peyban as a stabilization contractor. Because of importance of the speed, accuracy, and honesty in the words and actions of the contractor, I feel that the stabilization project is a major construction project. I saw these features in Peyban Company very strongly. I know this Peyban Company for 10 years. The economic conditions of the country are weak and the prices are changing every day, so the companies cannot fulfill their obligations under the contract. But Peyban Company, which is a very strong stabilizer, has also proved its stability to fulfill its obligations, and I am glad that for conducting this project well.
Mr. Mohaghegh, Saadat Abad project
We entrusted the soil stabilizer operation to Peyban Engineering Company and during the contract we signed with Dr. Mohagheghi, the stabilization of the pit is by nailing and anchorage and truss retaining structure methods. The weight of the structure is about 200 tons and the excavation area is about 1600 square meters. Excavation is done in two steps. The digging depth on the north side and south side is about 14 and 16 meters respectively. Digging began with a well-drilling operation and 48 wells were timely drilled by about twenty days
Eskan Sanat Pars Company, Khatam Al Nabeein project
I am Amir Akbari, the project manager of Yas Gholhak, my previous projects were in the form of complete traditional nailing and stabilization. Therefore, we decided to set up our new project based on modern technology. The new project is implemented based on top-down stabilization. According to our research and review, we concluded that we can entrust Peyban Co., which was one of our options, moreover, we have been working with this company for a year. Their technical team was very professional so that we are completely satisfied with the top-down stabilization system
Mr. Akbari, Gholhak Project
I am Bayat, the owner of Ivan Farmanieh commercial and administrative project. Our project complex is 64,000 cubic meters of excavation volume at a depth of 30 meters from the base level, which was done by the Peyban company monitoring by Dr. Mohagheghi. From the beginning to the end, we had no problems with agile forces and experienced personnel. This project was completed in perfect health. Our project is a combination of TopDown, Nailing, and Strand basically. We completely used the top-down method of the western side of our project. That excavation, speculation, and execution of the gallery and all the cases were done by Peyban company within the specified time.
For more than 14 years, we have
exclusively carried out scientific
and executive activities related
to soil improvement, and we specialize
in providing you with the best
Today, after years of designing and
carrying out more than 200 geotechnical
projects, Peyban has become a precise,
experienced and structured group.
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