0-6715: Interaction Between Drilled Shaft and Mechanically Stabilized Earth (MSE) Wall PDF Download

Author: J.-L. Briaud
Publisher:
ISBN:
Category : Reinforced soils
Languages : en
Pages : 0

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Author: J.-L. Briaud
Publisher:
ISBN:
Category : Reinforced soils
Languages : en
Pages : 2

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Author: Md. Saidur Rahman
Publisher:
ISBN:
Category :
Languages : en
Pages : 282

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Currently there is no design guideline to consider the interaction between Mechanically Stabilized Earth (MSE) wall and the drilled shafts constructed inside the MSE wall under cyclic loading. The behaviors of the MSE wall and the drilled shafts under cyclic loading are important because the deformation of MSE wall and capacity of the drilled shaft under cyclic loading may be significantly different from these under static loading. This study encompasses a numerical study which investigates the influence of various factors on interaction between the MSE wall and the drilled shaft that is subjected to cyclic loading. The three-dimensional (3D) finite difference software, FLAC3D, is utilized in this study for the numerical analysis. A numerical model of a MSE wall is developed and calibrated using full-scale field test data. Thereafter a parametric study has been performed to investigate the influence of different factors on the interaction between the MSE wall and the drilled shaft that is subjected to cyclic loading. The investigated factors include backfill friction angle, backfill soil modulus, geogrid stiffness, cyclic loading magnitude, shaft length, and location of drilled shaft. The impact of those factors on lateral deflection in drilled shaft, horizontal and vertical deflections of MSE wall, lateral earth pressure, and stress and strain in geogrid is evaluated due to cyclic loading on the drilled shaft. The overall drilled shaft and MSE wall lateral deflection increases at all the parametric studies under cyclic loading. From the details parametric study results it can be concluded that the increase of tension and strain in geogrid varies at different elevations. The maximum geogrid tension and strain is found at 5.9 m elevation. The increase of lateral earth pressure also changes with the change of elevation. The maximum lateral earth pressure increase is found at 5.1 m elevation for all parametric study.

Author: Matthew Pierson
Publisher:
ISBN:
Category : Retaining walls
Languages : en
Pages : 145

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Mechanically stabilized earth (MSE) walls are recognized as a cost effective earth retention technology. In some cases structural foundations must pass through the reinforced fill due to the required footprint of the reinforced zone behind the facing. Limited information about the interaction between the structure and the MSE mass has been published, making efficient design difficult. It would be prohibitively expensive to construct and test all possible geometries or applications; therefore numerical modeling must be used to supplement physical data. This report contains a discussion of the analysis of physical test data and numerical modeling of an MSE test wall containing foundation elements. The test wall consists of an MSE wall with cast-in-place shafts contained within and solely supported by the reinforced fill. The finite difference numerical modeling program FLAC3D was used for analysis. A parametric study was conducted to determine how the various constituents of the physical wall as well as wall height affect wall-shaft behavior. Geogrid properties, particularly stiffness, were found to have the greatest influence on behavior. Wall height has a large influence on capacity at shaft movement of more than 2 inches. Analyses of the modeling results were used to create design recommendations for MSE walls with foundation elements.

Author: Fernando Navarrete
Publisher:
ISBN:
Category : Geosynthetics
Languages : en
Pages : 590

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Author: Tanit Chalermyanont
Publisher:
ISBN:
Category :
Languages : en
Pages : 238

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Author: Peter W. Merlin
Publisher:
ISBN: 9781626830257
Category : U-2 (Reconnaissance aircraft)
Languages : en
Pages : 293

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Designed as a stopgap measure to provide overhead reconnaissance capability during the early years of the Cold War, the versatile U-2 has since evolved to meet changing requirements well into the 21st century. Though many authors have documented the airplane's operational history, few have made more than a cursory examination of its technical aspects or its role as a NASA research platform. This volume includes an overview of the origin and development of the Lockheed U-2 family of aircraft with early National Advisory Committee for Aeronautics (NACA) and National Aeronautics and Space Administration (NASA) involvement, construction and materials challenges faced by designers and builders, releasable performance characteristics and capabilities, use of U-2 and ER-2 airplanes as research platforms, and technical and programmatic lessons learned.

Author: Alexandra Fletcher (Museum curator)
Publisher: British Museum Research Public
ISBN: 9780861591978
Category : Nature
Languages : en
Pages : 0

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A key publication on the British Museum's approach to the ethical issues surrounding the inclusion of human remains in museum collections and possible solutions to the dilemmas relating to their curation, storage, access management and display.

Author: Calin M. Popescu
Publisher: CRC Press
ISBN: 0824748549
Category : Technology & Engineering
Languages : en
Pages : 670

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Companies live or die on the basis of estimating their costs. Preparing estimates and bidding for new jobs is a complex and often costly process. There is no substitute for on the job training -- until now. Drawing on the authors' combined experience of more than 70 years, Estimating Building Costs presents state-of-the-art principles, practices, and techniques for assessing these expenditures that can be applied regardless of changes in the costs of materials, equipment, and labor. The book is an efficient and practical tool for developing contracts or controlling project costs. The authors cover the major components of the direct cost: estimating procedures and cost trends related to materials, construction equipment, and skilled and unskilled labor. They describe various types of building estimates encountered during the lifecycle of a project, as well as the role and accuracy of each. The book provides an overview of the industry, cost indexes in use, approaches to preparing a detailed estimate, and an in-depth description of the organization and function of the estimating group. Including CSI Master Format and UniFormat codes, estimating forms, a list of available estimating software packages, a detailed construction site and investigation report, the book provides a cost estimating methodology that readers can tailor to their own organizational needs.

Author: K.H. Stern
Publisher: Springer Science & Business Media
ISBN: 9400915012
Category : Science
Languages : en
Pages : 353

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Surface engineering is an increasingly important field and consequently those involved need to be aware of the vast range of technologies available to modify surfaces. This text provides an up-to-date, authoritative exposition of the major condensed phase methods used for producing metallurgical and ceramic coatings. Each method is discussed thoroughly by an expert in that field. In each chapter the principle of the method, its range of applications and technical aspects involved are described. The book not only informs the reader about established technologies familiar only to specialists, but also details activity on the frontier of coating technology providing an insight into those potential technologies not yet fully developed but which should emerge in the near future.