Numerical Modeling Characterization And Monitoring Of The Seasonal Behavior Of Expansive Clays

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Numerical Modeling, Characterization and Monitoring of the Seasonal Behavior of Expansive Clays

Author : Ivo Rosa Montenegro
Publisher :
ISBN 13 :
Total Pages : 457 pages
Book Rating : 4.:/5 (123 download)

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Book Synopsis Numerical Modeling, Characterization and Monitoring of the Seasonal Behavior of Expansive Clays by : Ivo Rosa Montenegro

Download or read book Numerical Modeling, Characterization and Monitoring of the Seasonal Behavior of Expansive Clays written by Ivo Rosa Montenegro and published by . This book was released on 2020 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seasonal ground movements associated with the swelling and shrinking of expansive clays represent a major cause of damage to buildings, roads, and pipelines. The processes that give rise to these movements involve complex ground-atmosphere interactions (due to combined effects of infiltration and evaporation), combined with highly non-linear hydraulic and mechanical properties of partially saturated clay. This thesis presents an integrated study to measure and interpret long-term ground movements at a greenfield test site in Mustang Ridge (MR), Texas, adjacent to toll road SH130. The site is underlain by almost 12 m of high plasticity (montmorillonite-rich) clay. We designed and installed an autonomous field station that measures local weather conditions together with sub-surface water contents, using WCR reflectometers, and deformations, through a novel system of string-pot potentiometers. We have obtained online data from the site for more than 3 years and observed a seasonal range of 50 mm in ground surface movements. We have investigated the engineering properties of the MR clay using samples extracted during site investigation and lab tests on compacted specimens of blended/reconstituted clay. These data are then used to calibrate constitutive models of suction-water content (SWCC), hydraulic conductivity and 1D compressibility for the MR clay. Numerical analyses of non-linear coupled flow-deformation in the partially-saturated soil column has been carried using a customized finite difference and finite volume framework (MPME) implemented within MATLAB. The MPME framework enables the representation of specified atmospheric boundary conditions (either as specified fluid pressures or fluxes) and hence, can simulate periods dominated by rainfall-induced infiltration or net drying by evapotranspiration. Parametric MPME analyses are used to interpret field measurements at the test site to explain seasonal fluctuations in average strains and water contents and hence, to interpret the active depth in the MR clay. The results show that surface cracks influence the transient response of ground movements by significantly increasing the hydraulic conductivity of the medium. This feature affects the response rate of soil deformations to atmospheric phenomena. This behavior was simulated through the use of a constitutive model proposed by Stewart et al. (2016a) that quantifies the development of desiccation cracking. By improving our understanding of sources of seasonal ground movements, the research provides the basis for a more robust design of foundations and roadbeds in areas underlain by expansive clays.

Characterization of the Swelling Behavior of Expansive Clays Using Centrifuge Technology

Author : Nicolas Alejandro Rivas
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (134 download)

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Book Synopsis Characterization of the Swelling Behavior of Expansive Clays Using Centrifuge Technology by : Nicolas Alejandro Rivas

Download or read book Characterization of the Swelling Behavior of Expansive Clays Using Centrifuge Technology written by Nicolas Alejandro Rivas and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental techniques with emphasis in centrifuge testing were implemented to characterize the swelling behavior of expansive clays. This research consisted in three self-contained sections related to the study of different aspects of expansive clays. The first research component focused on the implementation of a qualitative mineralogy analysis performed using x-ray diffraction to determine the main clay minerals in an expansive soil. The analysis was performed on the clay-sized fraction of the soil and samples with preferential and random orientation were used in the analysis. Vacuum filtration was used to produce oriented samples in order to maximize the intensity of the diagnostic basal spacing of the clay minerals, and samples were subjected to different treatments to produce changes in the basal spacing or crystalline structure of the clay minerals to facilitate their identification. The second research component examined the effect of the coarse fraction on the swelling characteristics of expansive soils using a centrifuge-based approach. Vertical strains at the end of primary swelling were evaluated for different proportions of coarse fraction by volume. It was found that the magnitude of vertical strains at the end of primary swelling decreased with increasing coarse fraction. It was concluded that the swelling depended uniquely on the ratio between the volume of soil solids of the fine fraction and the volume of voids. Additionally, when correcting the initial void ratio of the specimens to account for this, the relationship between vertical strains at the end of primary swelling and initial void ratio for the soil mixtures defines a unique linear trend with the baseline material. The third research component examined the potential vertical rise at three field sites in Central Texas. Method 6048-A was applied to evaluate the PVR of three field sites using direct measurements of the swelling characteristics of soils sampled at each location. Project-specific data was generated in a relatively short time using this centrifuge-based method. The results obtained demonstrated the need for testing of project-specific samples, as a significant variation in PVR was observed in Site 2 and 3 between boring locations, while less variation between borings was found in Site 1

Foundations on Expansive Soils

Author : Fu Hua Chen
Publisher : Elsevier
ISBN 13 : 044460166X
Total Pages : 301 pages
Book Rating : 4.4/5 (446 download)

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Book Synopsis Foundations on Expansive Soils by : Fu Hua Chen

Download or read book Foundations on Expansive Soils written by Fu Hua Chen and published by Elsevier. This book was released on 2012-12-02 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foundations on Expansive Soils provides the practicing engineer with a summary of the state-of-the-art of expansive soils and practical solutions based on the author's experience. The book is organized into two parts. Part I deals with theory and practice, and summarizes some of the theoretical physical properties of expansive soils. It also discusses various techniques employed to found structures on expansive soils such as drilled pier foundation, mat foundation, moisture control, soil replacement, and chemical stabilization. Topics covered include the origin, mineralogical composition, and the basic structure of expansive soils; the migration of water, swelling potential, and swelling pressure; site investigations and laboratory testing; moisture control; and soil stabilization. Part II presents case studies on the following: distress caused by pier uplift; distress caused by the improper design and construction of a drilled pier foundation system; distress caused by heaving of footing pad and floor slab; distress caused by heaving of continuous footings; and distress caused by a rise of ground water.

Unsaturated Soil Mechanics

Author : Ning Lu
Publisher : John Wiley & Sons
ISBN 13 :
Total Pages : 614 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Unsaturated Soil Mechanics by : Ning Lu

Download or read book Unsaturated Soil Mechanics written by Ning Lu and published by John Wiley & Sons. This book was released on 2004-05-20 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unsaturated Soil Mechanics is the first book to provide a comprehensive introduction to the fundamental principles of unsaturated soil mechanics. * Offers extensive sample problems with an accompanying solutions manual. * Brings together the rapid advances in research in unsaturated soil mechanics in one focused volume. * Covers advances in effective stress and suction and hydraulic conductivity measurement.

Selected Water Resources Abstracts

Author :
Publisher :
ISBN 13 :
Total Pages : 962 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Selected Water Resources Abstracts by :

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 962 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Unsaturated Soils - Volume 3

Author : J.F.T Juca
Publisher : CRC Press
ISBN 13 : 100044676X
Total Pages : 478 pages
Book Rating : 4.0/5 (4 download)

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Book Synopsis Unsaturated Soils - Volume 3 by : J.F.T Juca

Download or read book Unsaturated Soils - Volume 3 written by J.F.T Juca and published by CRC Press. This book was released on 2021-05-31 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unsaturated materials comprise residua, collapsible and expansive naturally occurring soils, compacted soils and, more recently, residues of solid wastes. The engineering problems associated with unsaturated materials range from those related to conventional geotechnical works (e.g. foundations, pavements, slopes and excavations, retaining structures, earthdams, irrigation canals, tunnelling, compacted embankments) to those included in the environmental area (e.g. natural slope instability, erosion and subsidence processes, tailings, residues or solid waste disposal, contaminant transport, remediation of contaminant sites, engineered barriers for environmental protection, re-use of residues). This book, published in three separate volumes, comprises a selection of selected and invited papers presented at the Third International Conference on Unsaturated Soils – UNSAT ‘2002 – that took place in Recife, Brazil, form 10th to 13th March 2002. The book is of interest to consultants, researchers, practitioners, lecturers and students with a background in geotechnical engineering, environmental engineering and engineering geology.

Foundation Engineering for Expansive Soils

Author : John D. Nelson
Publisher : John Wiley & Sons
ISBN 13 : 1118415299
Total Pages : 416 pages
Book Rating : 4.1/5 (184 download)

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Book Synopsis Foundation Engineering for Expansive Soils by : John D. Nelson

Download or read book Foundation Engineering for Expansive Soils written by John D. Nelson and published by John Wiley & Sons. This book was released on 2015-02-10 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Your guide to the design and construction of foundations on expansive soils Foundation Engineering for Expansive Soils fills a significant gap in the current literature by presenting coverage of the design and construction of foundations for expansive soils. Written by an expert author team with nearly 70 years of combined industry experience, this important new work is the only modern guide to the subject, describing proven methods for identifying and analyzing expansive soils and developing foundation designs appropriate for specific locations. Expansive soils are found worldwide and are the leading cause of damage to structural roads. The primary problem that arises with regard to expansive soils is that deformations are significantly greater than in non-expansive soils and the size and direction of the deformations are difficult to predict. Now, Foundation Engineering for Expansive Soils gives engineers and contractors coverage of this subject from a design perspective, rather than a theoretical one. Plus, they'll have access to case studies covering the design and construction of foundations on expansive salts from both commercial and residential projects. Provides a succinct introduction to the basics of expansive soils and their threats Includes information on both shallow and deep foundation design Profiles soil remediation techniques, backed-up with numerous case studies Covers the most commonly used laboratory tests and site investigation techniques used for establishing the physical properties of expansive soils If you're a practicing civil engineer, geotechnical engineer or contractor, geologist, structural engineer, or an upper-level undergraduate or graduate student of one of these disciplines, Foundation Engineering for Expansive Soils is a must-have addition to your library of resources.

Selected Water Resources Abstracts

Author :
Publisher :
ISBN 13 :
Total Pages : 1424 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Selected Water Resources Abstracts by :

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 1424 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Permeability and Groundwater Contaminant Transport

Author :
Publisher : ASTM International
ISBN 13 :
Total Pages : 261 pages
Book Rating : 4./5 ( download)

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Book Synopsis Permeability and Groundwater Contaminant Transport by :

Download or read book Permeability and Groundwater Contaminant Transport written by and published by ASTM International. This book was released on 1981 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Geotechnical Modelling

Author : David Muir Wood
Publisher : CRC Press
ISBN 13 : 1351990047
Total Pages : 582 pages
Book Rating : 4.3/5 (519 download)

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Book Synopsis Geotechnical Modelling by : David Muir Wood

Download or read book Geotechnical Modelling written by David Muir Wood and published by CRC Press. This book was released on 2017-12-21 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modelling forms an implicit part of all engineering design but many engineers engage in modelling without consciously considering the nature, validity and consequences of the supporting assumptions. Derived from courses given to postgraduate and final year undergraduate MEng students, this book presents some of the models that form a part of the typical undergraduate geotechnical curriculum and describes some of the aspects of soil behaviour which contribute to the challenge of geotechnical modelling. Assuming a familiarity with basic soil mechanics and traditional methods of geotechnical design, this book is a valuable tool for students of geotechnical and structural and civil engineering as well as also being useful to practising engineers involved in the specification of numerical or physical geotechnical modelling.

Applied Mechanics Reviews

Author :
Publisher :
ISBN 13 :
Total Pages : 680 pages
Book Rating : 4.3/5 (243 download)

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Book Synopsis Applied Mechanics Reviews by :

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 2000 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Transportation Research Record

Author :
Publisher :
ISBN 13 :
Total Pages : 810 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Transportation Research Record by :

Download or read book Transportation Research Record written by and published by . This book was released on 1990 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Geomechanics from Micro to Macro

Author : Kenichi Soga
Publisher : CRC Press
ISBN 13 : 1315737329
Total Pages : 1668 pages
Book Rating : 4.3/5 (157 download)

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Book Synopsis Geomechanics from Micro to Macro by : Kenichi Soga

Download or read book Geomechanics from Micro to Macro written by Kenichi Soga and published by CRC Press. This book was released on 2014-08-26 with total page 1668 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geomechanics from Micro to Macro contains 268 papers presented at the International Symposium on Geomechanics from Micro and Macro (IS-Cambridge, UK, 1-3 September 2014). The symposium created a forum for the dissemination of new advances in the micro-macro relations of geomaterial behaviour and its modelling. The papers on experimental investigati

Geo-frontiers 2011

Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (838 download)

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Book Synopsis Geo-frontiers 2011 by :

Download or read book Geo-frontiers 2011 written by and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

American Doctoral Dissertations

Author :
Publisher :
ISBN 13 :
Total Pages : 724 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis American Doctoral Dissertations by :

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1991 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Volcanic Rocks and Soils

Author : Tatiana Rotonda
Publisher : CRC Press
ISBN 13 : 1317299442
Total Pages : 212 pages
Book Rating : 4.3/5 (172 download)

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Book Synopsis Volcanic Rocks and Soils by : Tatiana Rotonda

Download or read book Volcanic Rocks and Soils written by Tatiana Rotonda and published by CRC Press. This book was released on 2015-09-03 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volcanic rocks and soils show a peculiar mechanical behaviour at both laboratory and in-situ scale due to their typical structural characters. Volcanic rocks and soils contains keynote lectures and papers from the International Workshop held in Ischia (Italy), 24-25 September 2015. The book deals with recent developments and advancements, as well as case histories, in the geotechnical characterization and engineering applications related to volcanic formations. It covers a variety of themes, including: • Geotechnical characterization under both static and cyclic/dynamic loading conditions, with special regard to structural properties at different scales (microstructural features; field and laboratory characterization; construction materials); • Geotechnical aspects of natural hazards (slope stability; seismic risk); • Geotechnical problems of engineering structures (foundations; embankments; excavations and tunnels). Volcanic Rocks and Soils is of interest to scientists and practitioners in the fields of rock and soil mechanics, geotechnical engineering, engineering geology and geology.

Correlations of Soil and Rock Properties in Geotechnical Engineering

Author : Jay Ameratunga
Publisher : Springer
ISBN 13 : 8132226291
Total Pages : 236 pages
Book Rating : 4.1/5 (322 download)

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Book Synopsis Correlations of Soil and Rock Properties in Geotechnical Engineering by : Jay Ameratunga

Download or read book Correlations of Soil and Rock Properties in Geotechnical Engineering written by Jay Ameratunga and published by Springer. This book was released on 2015-12-11 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a one-stop reference to the empirical correlations used extensively in geotechnical engineering. Empirical correlations play a key role in geotechnical engineering designs and analysis. Laboratory and in situ testing of soils can add significant cost to a civil engineering project. By using appropriate empirical correlations, it is possible to derive many design parameters, thus limiting our reliance on these soil tests. The authors have decades of experience in geotechnical engineering, as professional engineers or researchers. The objective of this book is to present a critical evaluation of a wide range of empirical correlations reported in the literature, along with typical values of soil parameters, in the light of their experience and knowledge. This book will be a one-stop-shop for the practising professionals, geotechnical researchers and academics looking for specific correlations for estimating certain geotechnical parameters. The empirical correlations in the forms of equations and charts and typical values are collated from extensive literature review, and from the authors' database.