Download or read book Effect of Organic Material on Soil Shear Strength written by AWN Al-Khafaji and published by . This book was released on 1981 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The term organic soil ordinarily refers to combinations of weathered rock products and partially decayed plant matter. The organic fraction tends to dominate soil physical properties for organic contents in excess of 20 percent by weight. To simulate these materials and to include precise control over organic content, fiber type and size, and mineral type, kaolinite and pulp fibers were used to prepare model organic soils. For comparison, kaolinite and all fiber samples were included. The effect of organic material on soil shear strength is shown in terms of consolidation and stress-strain behavior, undrained shear strength, and the shear strength parameters c' and ?'. Decomposition effects on vane shear strength are reported for selected soil samples and one consolidation pressure.
Download or read book Laboratory Shear Strength of Soil written by Ramond Nen Yong and published by ASTM International. This book was released on 1981 with total page 721 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory Shear Strength of Soil written by Raymond Nen Yong and published by ASTM International. This book was released on 1981 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shear Properties of an Organic Soil and the Same Soil with the Organic Matter Removed written by David Eugene Daniels and published by . This book was released on 1971 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The effect of strain rate on the shearing properties of an organic A̲ horizon Bryce clay and the same soil treated with hydrogen peroxide to remove the organic matter was studied. For both soils, the pore pressures were found to be independent of strain rate, and dependent only on the increment of strain during shear. The effect of the hydrogen peroxide treatment on the shear properties of an inorganic Bryce B̲ horizon clay was also studied. It was concluded that the hydrogen peroxide does not affect the mineral properties of the Bryce clay and serves only to selectively remove organic matter from the A̲ horizon Bryce soil. The greater strength of the organic soil over the same soil treated to remove the organic matter was also demonstrated. The hypothesis was offered that the organic matter creates an adhesive, compressible bond which produces a resistant soil structure in an organic clay soil subjected to shear"--Abstract, leaf ii.
Download or read book The Effects of Geological Features on Soil Strength written by E. L. Krinitzsky and published by . This book was released on 1970 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: X-ray examinations of fine-grained soils from the Lower Mississippi Valley revealed numerous geologic features that are not visible to the unaided eye. These features include significant fracture patterns, details of planar bedding, cross-laminations and turbulence, secondary mineralizations, root penetrations and voids left by roots, the presence of disseminated organic matter and other details. These geologic features affect the strength properties of the soils in which they occur. Experiments with multiple specimens from single samples embodying different features demonstrated that many large variations in strength properties were not only directly dependent of these features but were predictable in a relative sense. Normally, these features are never identified during routine soils testing although the effects of these features contribute to erratic test results. Pretest radiographic examination is a potential means of avoiding these problems. (Author).
Download or read book Ground Improvement Techniques and Geosynthetics written by T Thyagaraj and published by Springer. This book was released on 2018-09-01 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book comprises select proceedings of the 2016 annual conference of the Indian Geotechnical Society (IGC 2016), with technical papers on the theme “Ground Improvement and Geosynthetics”. The papers cover a wide range of topics, including chemical modification using admixtures, microbial-induced carbonate precipitation, geopolymers, fly ash and other industrial wastes, modification using geosynthetic materials such as natural and synthetic fibers, expanded polystyrene (EPS) geofoam, prefabricated vertical drains, geosynthetic encased-granular columns and mechanical densification through sand columns. This book is a valuable reference for researchers and practicing engineers alike.
Download or read book Agricultural Soil Mechanics written by A. J. Koolen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compared with forces occurring in soil mechanics problems in civil engineering, the forces that are applied to soil in farming operations generally have a short duration, less than a few seconds, a small loaded area, no more than a few square decimeters, and small intensities, 10 bar being a high value. On the other hand, soil properties vary widely between those of a weak mud and a stone-like dry soil. Tillage and related applications of force to soil are practiced worldwide in farming. Tillage operations are performed on one hectare of land for every three human beings. This means that for the food production for each individual daily, something like one cubic meter of soil is stirred, or about 20 times his body weight. Theoretical knowledge of this most common human activity, which largely determines the surface shape of the fertile part of the earth, is still very limited. In this book the authors have tried to give an outline of the present state of the art. One of the starting points was a course in soil dynamics taught by the authors at the Agricultural University at Wageningen, The Netherlands. We hope to reach interested readers who have no more theoretical knowledge than high school level, as well as readers who want to go beyond the level of a third year university student. For the chapter on wheels and tires we received substantial support from F. G. J. Tijink of the Tillage Laboratory at Wageningen.
Download or read book The Influence of Organic Matter on Shear Strength of a Cohesive Soil written by Kamran Rezvan and published by . This book was released on 1969 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The shearing properties of an organic A̲ horizon of Bryce clay were studied and compared with the properties of the same soil treated with hydrogen peroxide. The treatment was to remove the organic matter and isolate it as a variable. Tests were performed on artificially sedimented samples of the untreated, 75 percent untreated, 50 percent untreated, 25 percent untreated, and the treated soil. The effective stress failure envelopes were found to be higher for the untreated soil than that of the treated. The elastic deformation, however, was larger for the untreated samples. The pore water pressure development due to shearing process were found to higher for the treated soil. The difference in properties are thought to be caused by the presence or absence of the organic bonds"--Abstract, leaf ii.
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.
Download or read book Encyclopedia of Engineering Geology written by Peter T. Bobrowsky and published by Springer. This book was released on 2018-08-03 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume addresses the multi-disciplinary topic of engineering geology and the environment, one of the fastest growing, most relevant and applied fields of research and study within the geosciences. It covers the fundamentals of geology and engineering where the two fields overlap and, in addition, highlights specialized topics that address principles, concepts and paradigms of the discipline, including operational terms, materials, tools, techniques and methods as well as processes, procedures and implications. A number of well known and respected international experts contributed to this authoritative volume, thereby ensuring proper geographic representation, professional credibility and reliability. This superb volume provides a dependable and ready source of information on approximately 300 topical entries relevant to all aspects of engineering geology. Extensive illustrations, figures, images, tables and detailed bibliographic citations ensure that the comprehensively defined contributions are broadly and clearly explained. The Encyclopedia of Engineering Geology provides a ready source of reference for several fields of study and practice including civil engineers, geologists, physical geographers, architects, hazards specialists, hydrologists, geotechnicians, geophysicists, geomorphologists, planners, resource explorers, and many others. As a key library reference, this book is an essential technical source for undergraduate and graduate students in their research. Teachers/professors can rely on it as the final authority and the first source of reference on engineering geology related studies as it provides an exceptional resource to train and educate the next generation of practitioners.
Download or read book Soil Mechanics written by David Muir Wood and published by Cambridge University Press. This book was released on 2009-09-28 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book teaches the principles of soil mechanics to undergraduates, along with other properties of engineering materials, to which the students are exposed simultaneously. Using the critical state method of soil mechanics to study the mechanical behavior of soils requires the student to consider density alongside effective stresses, permitting the unification of deformation and strength characteristics. This unification aids the understanding of soil mechanics. This book explores a one-dimensional theme for the presentation of many of the key concepts of soil mechanics - density, stress, stiffness, strength, and fluid flow - and includes a chapter on the analysis of one-dimensional consolidation, which fits nicely with the theme of the book. It also presents some theoretical analyses of soil-structure interaction, which can be analyzed using essentially one-dimensional governing equations. Examples are given at the end of most chapters, and suggestions for laboratory exercises or demonstrations are given.
Download or read book Soil Structure written by Bobby A. Stewart and published by CRC Press. This book was released on 1995-06-13 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil Structure offers a multidisciplinary approach to the study of soil structure and its relevance to wide ranging investigations in environmental sciences. Topics covered in Soil Structure include soil structure determination, soil fabric genesis and functions, strength and stress distribution, fabric changes in plastic clays, the effects of organic matter and earthworms, air slaking, and hydraulic conductivity changes. The book also discusses litter decomposition and matter transport, the characterization of pore organization, monitoring via a neutron activated tracer, various influences on growth and phosphorus supply of plants and on water uptake by plants, the effects of acidification, and much more. Improved procedures for measuring and calculating the unsaturated hydraulic conductivity of structured soils are also given.
Download or read book Geotechnics of Organic Soils and Peat written by Bujang B.K. Huat and published by CRC Press. This book was released on 2014-02-18 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Peat and organic soils commonly occur as extremely soft, wet, unconsolidated surficial deposits that are an integral part of wetland systems. These types of soils can give rise to geotechnical problems in the area of sampling, settlement, stability, in situ testing, stabilisation and construction. There is therefore a tendency to either avoid building on these soils, or, when this is not possible, to simply remove or replace soils, which in some instances can lead to possibly uneconomical design and construction alternatives. However, in many countries of the world, these soils cover a substantial land area and pressure on land use is resulting in ever more frequent utilisation of such marginal grounds. For the successful design, construction and performance of structures on such marginal soils, it is crucial to predict geotechnical behaviour in terms of settlement, shear strength and stability, with respect to time. This means expanding our knowledge base and calls for a reliable characterisation of their geotechnical properties and mechanical behaviour and subsequently, the devising of suitable design parameters and construction techniques for dealing with these materials. A sound scientific understanding of the nature and functions of peat and organic soils is critical to their correct and safe use, and this book contributes by offering students, researchers, engineers and academics involved with these types of soils a comprehensive overview. This book will be useful not only to those in the field of geotechnical engineering, but also to soil scientists and agriculturalists, who are involved in the development of peatlands.
Download or read book Organic Matter Content of Soil After Logging of Fir and Redwood Forests written by Philip B. Durgin and published by . This book was released on 1980 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Correlates organic matter content of soil with depth.
Download or read book Piezocone and Cone Penetration Test CPTu and CPT Applications in Foundation Engineering written by Abolfazl Eslami and published by Butterworth-Heinemann. This book was released on 2019-11-23 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Piezocone and cone penetration tests (CPTu and CPT) applications in foundation engineering includes different approaches for determining the bearing capacity of shallow foundations, along with methods for determining pile bearing capacity and settlement concepts. The use of soft computing (GMDH) neural networks related to CPT records and Geotechnical parameters are also discussed. In addition, different cases regarding the behavior of foundation performance using case records, such as shallow foundation, deep soil improvement, soil behavior classification (SBC), and bearing capacity are also included. - Provides the latest on CPT and CPTu performance in geotechnical engineering, i.e., bearing capacity, settlement, liquefaction, soil classification and shear strength prediction - Introduces soft computing methods for processing soil properties and pile bearing capacity via CPT and CPTu - Explains CPT and CPTu testing methods which allows for the continuous, or virtually continuous, record of ground conditions
Download or read book Soils and Soil Fertility written by Louis Milton Thompson and published by McGraw-Hill Companies. This book was released on 1973 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil; Soil formation; Physical properties of soils; Soil water; Soil organic matter; Soil mnineralogy; Soil chemistry; Amending the soil; Fertilizers; Nitrogen; Phosphorus; Potassium; Calcium, Magnesium and Sulfur; The micronutrients; Variations in plant composition; Soil classification and survey; Land use and soil management; Water management; Soil conservation; Soil pollution.
Download or read book Proceedings of the 15th European Conference on Soil Mechanics and Geotechnical Engineering written by A. Anagnostopoulos and published by IOS Press. This book was released on 2013-03-21 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication contains the papers presented at the 15th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE), held in Athens, Greece. Considerable progress has been made in recent decades in understanding the engineering behavior of those hard soils and weak rocks that clearly fall into either the field of soil or of rock mechanics, and there have been important developments in design and construction methods to cope with them. Progress would be even more desirable, however, for those materials which fall into the ‘grey’ area between soils and rocks. They present particular challenges due to their diversity, the difficulties and problems arising in their identification and classification, their sampling and testing and in the establishment of suitable models to adequately describe their behavior. The publication aims to provide an updated overview of the existing worldwide knowledge of the geological features, engineering properties and behavior of such hard soils and weak rocks, with particular reference to the design and construction methods and problems associated with these materials. Part 4 was published post-conference and includes Conference Reports.
