Book•
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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DOI•
01 Dec 1985
TL;DR: In this article, a drag line equipped with a "Crescent11 scraper system can reclaim very long slopes in steep areas which were previously considered impossible for conventional dragline bucket and line systems.
Abstract: Draglines are presented in this paper as an alternative for mine reclamation in steep sloping areas. Some abandoned mines in steep sloping areas of Kentucky have unreclaimed slopes which pose safety problems, as well as environmental and aesthetic problems. In add it ion, many active mines in steep sloping areas of Kentucky have slopes which must be reclaimed in the near future. Current methods of slope reclamation in Kentucky typically involve traditional heavy equipment. The current methods are not cost efficient in some cases. and are not safe in some applications. The paper includes a history of draglines. Early development is summarized, and major improvements are discussed. Unreclaimed acreage in Kentucky and the mining and reclamation methods traditionally used for strip mines in Kentucky are discussed. The engineering feasibility of draglines is discussed. Bearing capacity and slope stability are presented as factors which influence the engineering feasibility of draglines in steep sloping areas. A presumptive value of hearing capacity for a typical spoil bank is calculated. The factor of safety against slope stability failure is dis cussed. A reclamation method which minimizes the risk of bearing or slope stability failures is presented. The economic feasibility of dragline reclamation is also presented. The initial cost and production costs of dragline equipment is compared to the initial cost and production costs of other reclamation equipment. In addition, the ncrescent" scraper system is introduced as an alternative to conventional dragline bucket and line Systems. A drag line equipped with a "Crescent11 scraper system can reclaim very long slopes in steep areas which were previously considered unfeasible for
1 citations
01 Oct 2011
TL;DR: In this paper, the Finite Element Method is applied to various pavement configurations to determine pavement capacity and evaluate the importance of connections with tiebars, and the results of these analyses can be used to guide a full-scale testing program and help develop design procedures.
Abstract: Stormwater quantity control is an important issue that needs to be addressed in roadway and ancillary transportation facility design. Pervious concrete has provided an effective solution for storm runoff for parking lots, sidewalks, bike trails, and other applications. It should be readily adaptable for use on roadway shoulders. Being a relatively new material for use in pavement for roadways, there is a lack of knowledge of the strength and behavior of pervious concrete slabs. While standard procedures for rigid pavement design with Portland cement concrete have been recommended, there are fundamental differences with pervious concrete pavement. These include a variation in concrete strength and stiffness through the depth of a slab and differences in the subgrade. Also, the main concern for a shoulder is the need to withstand wheel loadings from encroaching truck traffic. Both the strength of the pervious concrete pavement and the interface with the mainline pavement must be evaluated. Typically, tiebars are used at the interface to connect the shoulder and mainline slabs. The capacity and durability of pervious concrete at the tiebars is unknown, and steel reinforcing may not be an option with pervious systems. While full-scale testing of pervious concrete pavement is desirable, a preliminary evaluation can be performed quickly and economically through computer simulation. The Finite Element Method is a proven technique for the evaluation of solids and structures. With this approach, a number of loading scenarios can be applied to various pavement configurations to determine pavement capacity and evaluate the importance of connections with tiebars. The results of these analyses can be used to guide a full-scale testing program and help develop design procedures.
1 citations
Cites background from "Foundation analysis and design"
...…of Tables Table 2.1 Moduli of elasticity of soils (Bowles, 1996)....................................................................9 Table 2.2 Poisson’s ratio of soil (Bowles, 1996)…...
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...…2.1 Moduli of elasticity of soils (Bowles, 1996)....................................................................9 Table 2.2 Poisson’s ratio of soil (Bowles, 1996) .............................................................................9 Table 2.3 Modulus of elasticity of soil (Coduto,…...
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...Bowles (1996) has reported a list of values for the modulus of elasticity and Poisson’s ratio of various soil types that are listed in Table 2.1 and Table 2.2, respectively....
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Dissertation•
01 Jul 2008
TL;DR: In this article, Laoout et al. studied the bearing capacity of foundations and the bearing capacities of an individual pile in Cohesive Soils and concluded that bearing capacity is a function of the density of the soil.
Abstract: XIII CHAPTER 1: INTRODUCTION 1,1 Background of the Study L2 Objectives of the Study 1,3 The Research Scheme 1.4 The Thesis Laoout CHAPTER 2: LITERATURE REVIEW 2,1 Bearing Capacity of Foundations 2,2 Bearing Capacity of an Individual Pile 2,2, I End Bearing of Piles in Cohesive Soils 2,2, 1,1 Meyerhof's Deep Foundation Solution 2.2, I ,2 Skempton's Bearing Capacity Factors for Piles
1 citations
TL;DR: In this article, the authors presented a numerical study on the low-amplitude responses of an infinite Bernoulli-Euler beam resting on a viscoelastic foundation subjected to harmonic line loads.
Abstract: This paper presents a numerical study on the low-amplitude responses of an infinite Bernoulli-Euler beam resting on a viscoelastic foundation subjected to harmonic line loads. To simulate the linear response, a semi-analytical solution procedure that was theoretically proposed by Jang (2016) is utilized and several numerical experiments are conducted to investigate the influence of key model parameters characterizing stiffness and damping. The properties of the viscoelastic foundation are based on theoretical and empirical values for cohesionless sand type foundation. According to the numerical experiments, the obtained responses are compared with those from the closed-form solution and found to have a good agreement with them.
1 citations
TL;DR: In this paper, the authors present flexural analysis of laterally loaded piles considering nonlinear p-y curves and the modulus of elasticity of soil estimated from pressuremeter test data.
Abstract: The paper presents flexural analysis of laterally loaded piles considering nonlinear p–y curves and the modulus of elasticity of soil estimated from pressuremeter test data treating the pile as a beam on elastic foundation with the load coming at the top. Solution of the problem using nonlinear p–y curves (as suggested by Menard (1975)) is found using an iterative technique as well as elastic continuum approach (following Poulos and Davis approach). Deflection and bending moments were predicted at some designated points and compared with measured valued as reported in literature. The predicted values of deflection of the pile are generally on the higher side for elastic continuum approach. The deflection values when predicted by using nonlinear p–py curves are either lower or higher than the observed values depending on the rheological coefficient. However, the comparison of the results is found to be reasonable and well within the range of experimental errors.
1 citations