Overall summary of Jamshidieh residential project – 32nd (Koohsar):
Jamshideh – 32nd is one of the earth retention projects of Istasazeh corporation which is located in the 1st district of Tehran close to Jamshidieh park.
This project was in a site with an area of 1407 square meters. Structural and architectural designs conducted by the client showed that the sub-foundation level was -17.3 which made it necessary for Istasazeh to reconstruct the excavation and stabilization to reach that required level. Istasazeh corporation was in charge of demolishment, excavation, and constructing the stabilizing system for excavation walls.
Challenges of Jamshidieh residential project – 32nd (Koohsar):
The water valve being on the south side of the site, and the elevation difference between the north and south side of the site being extremely high, made it impossible to stop any dust caused by the demolishment from spreading.
The site was in a very dense district, so there were complaints by the neighbors due to the construction being extremely loud, causing delays in the process of construction.
Neighbor buildings and their overloads are one of the most important aspects when it comes to designing and constructing urban excavation projects.
The area around the project site was a mixture of streets and buildings. The 32nd Street was adjacent to the north side and the Tekyeh-Bala Street was adjacent to the south side. On the other hand, there was a 5-storey building with a 2-storey basement adjacent to the west side and another 4-storey building with a single storey basement on the south-west side of the site. Paeez alley was also adjacent to the east side of the site.
It is worth to say that the west wall overloud was considerably heavier compared to other walls, so it made the monitoring process and controlling the displacement of the west wall very critical.
Constructing the reinforcements such as soil nailing and substructure anchorage on the adjacent west side building required the consent of its residents and as a result the client was obliged to get official permission from them to avoid any further legal problems that otherwise would’ve stopped the project.
The main challenge however was the existence of enormous rigid rocks in the middle and inside the walls of the excavation, resulting in an increase in working time and expenses. The stabilizing operation which included paneling, shotcrete appliance, and most importantly the excavation of reinforcement boreholes took a lot more time and energy to complete and caused the machineries to wear out more often.
One of the other challenges of this project was the concern over lateral hydrostatic tension caused by the open gutter on the east side of the site.
The last challenge was the limited time schedule offered by the client to complete the project.
Solutions in Jamshidieh residential project – 32nd (Koohsar):
The construction team used water tanks to stop the dust from spreading into the neighborhood and disturbing the residents. The team also scheduled the demolishing operation to be in the hours of the day which were less likely to interfere with the daily lives of the neighbors.
Underground electric, gas, water, and sewage installation plans were also acquired to avoid any accidents caused by reinforcing the northern (on 32nd Street) and eastern (on Paeez alley) excavation walls.
After all the evaluations for choosing the optimal stabilizing system had completed by Istasazeh corporation, reinforcement started by soldering, nailing, and anchoring the eastern excavation wall and soldiering and anchoring the western excavation wall. A system of nailing and anchoring was also used for the northern excavation wall.
To protects the numerous trees on the northern and eastern side of the excavation, arrangements was made with city administration to transfer these trees to preserve them from any potential damage.
Since the ground of the project site was made from large rigid rocks, it was not possible to just use a grabbing crane and thus a special destruction team had to destroy the rocks using special methods.
To reduce the sound and stop the neighbors from disturbance, crushing the rocks was scheduled for the early hours of the working day and the operations that produced less sounds such as injecting the reinforcements boreholes, adjusting the walls, installing the head nails and head anchors, painting the sheets, etc. were scheduled for the middle of the working day and constructions that used the least sound such as concrete pouring was scheduled for the end of the working day.
The construction team was also able to protect the eastern side wall from lateral hydrostatic tension by drainage and installing the geodrain strip.
Because of the tight schedule, many different units such as the stabilizing unit, the destruction unit, the excavation unit, and the welding unit had to worked simultaneously to make the constructions.
Jamshidieh residential project – 32nd (Koohsar)
Overall summary of Jamshidieh residential project – 32nd (Koohsar):
Jamshideh – 32nd is one of the earth retention projects of Istasazeh corporation which is located in the 1st district of Tehran close to Jamshidieh park.
This project was in a site with an area of 1407 square meters. Structural and architectural designs conducted by the client showed that the sub-foundation level was -17.3 which made it necessary for Istasazeh to reconstruct the excavation and stabilization to reach that required level. Istasazeh corporation was in charge of demolishment, excavation, and constructing the stabilizing system for excavation walls.
Challenges of Jamshidieh residential project – 32nd (Koohsar):
The water valve being on the south side of the site, and the elevation difference between the north and south side of the site being extremely high, made it impossible to stop any dust caused by the demolishment from spreading.
The site was in a very dense district, so there were complaints by the neighbors due to the construction being extremely loud, causing delays in the process of construction.
Neighbor buildings and their overloads are one of the most important aspects when it comes to designing and constructing urban excavation projects.
The area around the project site was a mixture of streets and buildings. The 32nd Street was adjacent to the north side and the Tekyeh-Bala Street was adjacent to the south side. On the other hand, there was a 5-storey building with a 2-storey basement adjacent to the west side and another 4-storey building with a single storey basement on the south-west side of the site. Paeez alley was also adjacent to the east side of the site.
It is worth to say that the west wall overloud was considerably heavier compared to other walls, so it made the monitoring process and controlling the displacement of the west wall very critical.
Constructing the reinforcements such as soil nailing and substructure anchorage on the adjacent west side building required the consent of its residents and as a result the client was obliged to get official permission from them to avoid any further legal problems that otherwise would’ve stopped the project.
The main challenge however was the existence of enormous rigid rocks in the middle and inside the walls of the excavation, resulting in an increase in working time and expenses. The stabilizing operation which included paneling, shotcrete appliance, and most importantly the excavation of reinforcement boreholes took a lot more time and energy to complete and caused the machineries to wear out more often.
One of the other challenges of this project was the concern over lateral hydrostatic tension caused by the open gutter on the east side of the site.
The last challenge was the limited time schedule offered by the client to complete the project.
Solutions in Jamshidieh residential project – 32nd (Koohsar):
The construction team used water tanks to stop the dust from spreading into the neighborhood and disturbing the residents. The team also scheduled the demolishing operation to be in the hours of the day which were less likely to interfere with the daily lives of the neighbors.
Underground electric, gas, water, and sewage installation plans were also acquired to avoid any accidents caused by reinforcing the northern (on 32nd Street) and eastern (on Paeez alley) excavation walls.
After all the evaluations for choosing the optimal stabilizing system had completed by Istasazeh corporation, reinforcement started by soldering, nailing, and anchoring the eastern excavation wall and soldiering and anchoring the western excavation wall. A system of nailing and anchoring was also used for the northern excavation wall.
To protects the numerous trees on the northern and eastern side of the excavation, arrangements was made with city administration to transfer these trees to preserve them from any potential damage.
Since the ground of the project site was made from large rigid rocks, it was not possible to just use a grabbing crane and thus a special destruction team had to destroy the rocks using special methods.
To reduce the sound and stop the neighbors from disturbance, crushing the rocks was scheduled for the early hours of the working day and the operations that produced less sounds such as injecting the reinforcements boreholes, adjusting the walls, installing the head nails and head anchors, painting the sheets, etc. were scheduled for the middle of the working day and constructions that used the least sound such as concrete pouring was scheduled for the end of the working day.
The construction team was also able to protect the eastern side wall from lateral hydrostatic tension by drainage and installing the geodrain strip.
Because of the tight schedule, many different units such as the stabilizing unit, the destruction unit, the excavation unit, and the welding unit had to worked simultaneously to make the constructions.
