TY  - JOUR
T1  - Numerical Modeling Analysis of the Geogrid Pre-Stress Effects on Granular Soils Parameters by Finite Element Method
AU - Saryazdi, Omid Ahangar AU - Astaneh, S.M. Farid 
JO  - Journal of Engineering and Applied Sciences
VL  - 10
IS  - 7
SP  - 157
EP  - 166
PY  - 2015
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2015.157.166
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2015.157.166
KW  - Pre-stress
KW  -granular soil
KW  -innovative construction method
KW  -weak soil
KW  -PRSi
AB  - This study presents the results of numerical analysis carried out with a new manufacturing method for reinforced soil structures with geosynthetic known as reinforced prestressed soil. The concept of Pre-stressed Reinforced Soil (PRS<SUB>i</SUB>) was developed to increase the load bearing capacity of a reinforced soil structure and introduced to improve its displacement behavior. PRS<SUB>i</SUB> concept was validated by laboratory studies. The positive effects of reinforcement prestressing on the improvement of resistance and reduce the settlement of a reinforced granular beds located on a weak soil was analyzed by a series of bearing capacity at the laboratory scale. The effect of parameters including the resistance of the underlying weak soil, the thickness of the granular bed, presressing force&#146;s size, the extension of presressing force, the number of reinforcement layers and geogrid axial stiffness are analyzed. A soil element is taken and its behavior in a place under load is analyzed. The results of this research indicate that the models with geogrid vertical distances of 3, 2, 4 and 1 are in a better condition, respectively and the vertical distance of 3 presents a result better than other distances.
ER  -