Mohsen Yeganeh - Master of Geotechnical Engineering, Islamic Azad University Central Tehran Branch,Iran

Providing the lack of surface soil bearing capacity, the deep foundations (piles) can be a good choice for load transmission to the soil in the lower depths, mainly used as a group of piles. Using of the pile group in recent era, comparing the surface foundation, needs some extra studies, considering the needed time and cost. The review of previous studies in static state was the subject of this study. After the related researches statement and used methods in present study progress it has been paid attention