2D Numerical Simulations of Soil Nail Walls

Singh, Vikas Pratap; Babu, G. L. Sivakumar

doi:10.1007/s10706-009-9292-x

Cited by 72 publications

(41 citation statements)

References 15 publications

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“…In this paper, the modeling and analysis were done by Abaqus software in comparison with the numerical results of the studies by Babu and Singh for verification. They analyzed a soil nailed wall in five stages by the excavation of 2 m by Plaxis software [19]. The lateral displacement of the soil nailed wall is affected by excessive uplift and has unreasonable lateral displacement, this problem is due to the soil elasticity modulus in the reloading situation is equal to the loading condition (the Mohr-Coulomb model) in Abaqus, which may lead to overestimation of uplift in the excavation bottom.…”

Section: Verificationmentioning

confidence: 99%

Determination of Multilayer Soil Strength Parameters Using Genetic Algorithm

Hashemi

Rahmani²

2018

CivileJournal

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This paper employs a back analysis method to determine soil strength parameters of the Mohr-Coulomb model from in situ geotechnical measurements. The lateral displacement of a soil nailed wall retaining an excavation in Tehran city used as a criterion for the back analysis. For this purpose, a genetic algorithm is applied as an optimization algorithm to minimize the error function, which can perform the back analysis process. When the accuracy of modeling is verified, the back analysis is performed automatically by creating a link between genetic algorithm in MATLAB and Abaqus software using Python programming language. This paper demonstrated that the genetic algorithm is a particularly suitable tool to determine 9 soil strength parameters simultaneously for 3 soil layers of the project site to decrease the difference of lateral displacement between the results of project monitoring and numerical analysis. The soil strength parameters have increased, with the most changes in Young's modulus of the first to third layers as the most effective parameter, 49.45%, 61.67% and 64.35% respectively. The results can be used in advanced engineering analyses and professional works.

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Section: Verificationmentioning

confidence: 99%

Determination of Multilayer Soil Strength Parameters Using Genetic Algorithm

Hashemi

Rahmani²

2018

CivileJournal

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“…The shotcrete facing of wall was modeled using plate element. In this study, the Mohr-Coulomb Model (MC-model) and Hardening Soil Model (HS-model) were selected as the soil model and the results of each model were discussed [6]. Based on laboratory and in-situ tests, Soil parameters used for finite element analysis are summarized in Table 2.…”

Section: Finite Element Modelingmentioning

confidence: 99%

Stabilization of Deep Excavation in Loose Fill Using Soil Nail Wall

Sadigh¹,

Mojtahedi²

2017

Proceedings of the 2nd World Congress on Civil, Structural, and Environmental Engineering

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In recent years, due to city development, excavation and building construction in the loose fill of the south side of Tabriz, Iran is inevitable. This paper presents a case study of stabilization of a 16 m deep excavation in loose fill using soil nail wall in the south of Tabriz. Design, construction, construction difficulties and their solutions are discussed in this paper. The finite element analysis is conducted. The numerical simulation of soil nail wall is verified via comparing calculated wall displacement with the field measured values. The results show that in the sites without sensitive structures to deform in the vicinity of the excavation area, soil nailing is an effective and economical method for stabilization of excavations with a vertical cut in the loose fill. For better matching of calculated displacements of soil nail wall with field measured values, using hardening soil model and simulation of construction stages according to the actual execution in the site is recommended.

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“…Shear and bending resistance of soil nails is conservatively ignored in the conventional analysis and design of soil-nail walls. However, Singh and Babu [19] considered bending stiffness, showed normally with EI, of soil nails in their analysis of soil-nail walls. As stated, the plate structural element in Plaxis can be used to perform analysis of soil-nail walls considering bending stiffness of soil nails (bending stiffness -EI).…”

Section: Soil-nailing Materialsmentioning

confidence: 99%