چكيده به لاتين
In excavation operations, one of the most important and effective parameters on its overall stability and performance is wall deformation occurred due to its construction. Variety of methods is created to reduce and control the deformations and resist wall rupture, which one of the most effective, affordable and widely used method is soil nailed walls. Prediction of deformations and optimum design of soil nails system is a critical issue in the process of soil nail wall system design that is studied and investigated by many researchers. Numerical analysis and software modeling are common evaluation methods of such geotechnical behavior issues. Analysis, calculated deformations and the optimum nail density of convex corners is always a concern and problem for geotechnical engineers in the field of analysis and design of excavations that absence of accurate estimation of these factors can lead to irreparable damage. On the other hand, if the values of these deformations and density of designed soil nails calculated more than needed amount to meet the desired safety factor will cause increased financial costs. Due to time-consuming three-dimensional analysis of soil nailed walls these walls are often models in two-dimensional analysis and results in two-dimensional analysis usually provides conservative values. But convex corners due to increased reinforcement have been excluded from mentioned rules. The purpose of this study is to assess the differences between the results of the three-dimensional analysis and two-dimensional simplified analysis assuming plane strain state. For this purpose finite element software Plaxis 2D software and Plaxis 3D Foundation models are made and after analyzing, deformations are compared with each other. In this regard, the studies in this research will show results of convex corners modeling that really affected by three-dimensional geometric conditions and compares them with the results of two-dimensional analysis.
Keywords:
Convex corners, Three-dimensional analysis, Deformation, Soil nailed walls, Finite element method
