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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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01 Jan 2013
TL;DR: In this paper, the authors presented a study of constitutive parameter value identification by inverse analysis on an earth and rockfill dam application, and the objective was to examine if the technique of inverse analy...
Abstract: The paper presents a study of constitutive parameter value identification by inverse analysis on an earth and rockfill dam application. The objective is to examine if the technique of inverse analy ...
5 citations
TL;DR: In this article, the results from the log-log method have been validated with the actual values of pre-consolidation stress of the soil mass in the field from the laboratory one dimensional consolidation test data.
Abstract: Pre-consolidation stress is a maximum consolidation stress to which the soil mass has been subjected in the past. Many methods are available to determine the value of pre-consolidation stress of an over consolidated soil mass in the field from the laboratory one dimensional consolidation test data. These methods, except the log–log method, have their own in-built limitations and their results are not validated. In the present work, the results from the log–log method have been validated with the actual values of pre-consolidation stress of the soil mass. It has also been shown through a comparative study that the log–log method is user friendly and that it yields conservative values of pre-consolidation stress for undisturbed soils as well as for compacted soils.
5 citations
TL;DR: In this paper, a study of the influence groundwater level has on the ultimate bearing capacity of shallow foundations on the rock mass was performed using the finite difference method, and the numerical results included three possible locations of groundwater level: at the foundation level, at a depth equal to a quarter of the footing width from the foundation, and inexistent location.
Abstract: The presence of the groundwater level (GWL) at the rock mass may significantly affect the mechanical behavior, and consequently the bearing capacity. The water particularly modifies two aspects that influence the bearing capacity: the submerged unit weight and the overall geotechnical quality of the rock mass, because water circulation tends to clean and open the joints. This paper is a study of the influence groundwater level has on the ultimate bearing capacity of shallow foundations on the rock mass. The calculations were developed using the finite difference method. The numerical results included three possible locations of groundwater level: at the foundation level, at a depth equal to a quarter of the footing width from the foundation level, and inexistent location. The analysis was based on a sensitivity study with four parameters: foundation width, rock mass type (mi), uniaxial compressive strength, and geological strength index. Included in the analysis was the influence of the self-weight of the material on the bearing capacity and the critical depth where the GWL no longer affected the bearing capacity. Finally, a simple approximation of the solution estimated in this study is suggested for practical purposes.
5 citations
01 Aug 2003
TL;DR: In this paper, a practical procedure for the analysis of multi-braced earth retaining structures considering various excavation stages is presented for the first time, taking into account the interactions among pile, soil and bracings, and through stage by stage analysis of the effect of the excavation process on internal forces, support reactions and displacements of a pile.
Abstract: A practical procedure for the analysis of multi-braced earth retaining structures considering various excavation stages is presented in this paper for the first time. Taking into account the interactions among pile, soil and bracings, and through stage by stage analysis of the effect of the excavation process on internal forces, support reactions and displacements of a pile, a computation procedure is proposed based on flexural differential equations for multi-braced earth retaining structures. Comparison is made between the proposed method and the measured data and close agreement has been found. It is noted that the design moment of a pile should be the maximum moment during the entire excavation process (not necessarily the last stage). The proposed method has addressed this issue in the design stage and also provided technical guidance for the construction process. The method is simple and efficient. In fact, the computation can be done manually when the bracings are less than three.
5 citations
01 Jan 2011
TL;DR: In this article, a finite element method in Cartesian coordinates is formulated using two dimensional plane stress isoparametric finite elements to model the deep beam and elastic springs to model a Winkler type elastic foundation.
Abstract: This paper deals with linear elastic behavior of deep beams resting on linear and nonlinear Winkler type elastic foundations with both compress ional and tangential resistances. The basic or governing equations of beams on nonlinear elastic Winkler foundation are solved by finite difference method. The finite element method in Cartesian coordinates is formulated using two dimensional plane stress isoparametric finite elements to model the deep beam and elastic springs to model the foundation. Two computer programs coded in fortran_77 for the analysis of beams on nonlinear elastic foundations are developed. Comparisons between the two methods and other studies are performed to check the accuracy of the solutions. Good agreement was found between the solutions with percentage difference of 3%. Several important parameters are incorporated in the analysis, namely, the vertical subgrade reaction, horizontal subgrade reaction and beam depth to trace their effects on deflections, bending moments and shear forces.
5 citations