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Foundation analysis and design

01 Jan 1968-
TL;DR: In this paper, Fondation de soutenagement et al. presented a reference record for Dimensionnement Reference Record created on 2004-09-07, modified on 2016-08-08.
Abstract: Keywords: Fondation ; Mur de soutenement ; Pieux ; Capacite portante ; Ancrage ; Dimensionnement Reference Record created on 2004-09-07, modified on 2016-08-08
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TL;DR: In this paper, a combined rectangular footing with both Axial force and Moment on both columns is analyzed using Rigid (conventional) Method and the same footing is also analyzed by Finite Element and Winkler Model Approach and the results of both analysis is compared.
Abstract: As we know the foundation is the most important member of the building and a precise analysis of footing will results in more safe and economic design. In the present study combined rectangular footing loaded with both Axial force and Moment on both columns is analyzed using Rigid (conventional) Method and the same footing is also analyzed by Finite Element and Winkler Model Approach and the results of both analysis is compared. The results of an analysis typically include support reactions, Bending and shear stresses and displacements. The Winkler Model Method is sometimes also called as Simplified Elastic Approach. Further the Computer program is written in MATLab to solve the problem and parametric study is also carried out for various values of Number of Element, Modulus of Subgrade reaction (Kf).

1 citations

Journal ArticleDOI
TL;DR: In this paper , the effect of different nail parameters (nail inclination, nail length, and nail spacing) on slope stability was investigated using PLAXIS 2D, where four different slope angles and three different backslope angles were considered for assessing the impact of slope geometry on the stability of a nailed slope.
Abstract: This study focuses on the stability analysis of slopes reinforced by soil nailing. The effects of slope geometry and nail parameters on slope stability are investigated using PLAXIS 2D. Four different slope angles and three different backslope angles are considered for assessing the effect of slope geometry on the stability of a nailed slope. The factor of safety (FS) was found to decrease with the increasing values of the slope angle as well as the backslope angle. The influence of different nail parameters (nail inclination, nail length, and nail spacing) was also investigated. With the increase in nail inclination, FS was found to increase initially and thereafter, reaching a peak value followed by a drop in FS. The optimum nail inclination was found between 0 and 25° at a horizontal angle, depending on the different slope geometries, which is evident from observation of the slip surface as well. With the increase of nail length, FS increases; however, the increase was small after L/H (length of nail/height of slope) reached a value of 0.9. Moreover, increasing the length of the nail was found to be effective in reducing the lateral movement of the slope. The maximum nail forces are observed in the bottom-most row of nails and increase with the depth. The inclusion of soil nailing with optimum nail parameters can increase FS by 29–75% depending on the slope geometry, signifying the effectiveness of nailing.

1 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the time-varying mechanical performance of partially embedded pile groups subjected to vertical loads in multilayered cross-anisotropic fractional viscoelastic saturated soils.
Abstract: This paper investigates the time-varying mechanical performance of partially embedded pile groups subjected to vertical loads in multilayered cross-anisotropic fractional viscoelastic saturated soils. Piles are considered as one-dimensional compression bars and the stiffness matrix of a single pile and the global stiffness matrix of partially embedded pile groups are obtained by the finite element method. Based on the boundary element method, the soil stiffness matrix is deduced by expanding the extended precise integration solution. Then, the solution for partially embedded pile groups in multilayered fractional viscoelastic saturated soils is derived by employing the boundary element-finite element coupling method. Comparisons with existing solutions and an ABAQUS model prove the correctness of the proposed method. Numerical analyses are carried out to evaluate the influences of fractional derivative order, free length, pile spacing, pile-soil stiffness ratio as well as soil stratification on the time effect of partially embedded pile groups under vertical loads.

1 citations