Evaluation of Constitutive Soil Models in Soil Nail Wall Using Centrifuge Model

Document Type : Research Article

Authors

1 Associate professor, Imam Hossein University/ Department of Civil Engineer

2 Department of Civil Engineer, Science and Technology University

Abstract

Numerical modeling is a strong tool for soil deformation in deep excavations. There is some kind of methods such as finite element, finite difference and etc. Finite element method helps to select the appropriate constitutive soil model with high accuracy. The controversy between simplicity and accuracy is an important issue always has been interested in by the researchers. By using physical modeling, the accuracy of each constitutive soil modeling could be an asset. In this paper, four models of geotechnical centrifuges were used to investigate the effect of the overburden distance from the edge of the excavation and the results of various constitutive soil modeled in the soil nailing wall. The results showed that the overburden distance from the edge of the wall was so effective on the value and pattern of wall deformation. By increasing the overburden distance from the edge of the excavation, the greatest amount of horizontal deformation of the wall led to the bottom of the excavation. However, the basis of the numerical solution, without the overburden distance from the edge of the excavations, this deformation always occurs in the top of the excavation. Also, based on the comparison of the results of centrifuge models and the results obtained from different behavioral models, in order to predict the vertical deformation of the top of the excavation, the result of hardening soil small strain model (HSS) was closer to reality than other investigated constitutive soil model.

Keywords

Main Subjects

References

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Amirkabir Journal of Civil Engineering
Volume 52, Issue 1
April 2020
Pages 171-186

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