Download or read book Behaviour of a Basal Reinforced Embankment on Soft Organic Soil written by Andrew Peter Morris and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Problematic Soils written by Ian Jefferson and published by Thomas Telford. This book was released on 2001 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Problematic soils brings together in one volume a collection of papers presented at the Problematic Soils symposium, organised by East Midlands Geotechnical Group of the Institution of Civil Engineers. The papers discuss the behaviour and characteristics of problematic soils (particularly those found in the UK), and they also offer guidance on possible treatment techniques that could be applied for their successful engineering.The proceedings of this symposium are split into three sections.
Download or read book Effects of Reinforcement and Soil Viscosity on the Behaviour of Embankments Over Soft Soil written by Chalermpol Taechakumthorn and published by . This book was released on 2011 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: A verified elasto-viscoplastic finite element model is used to develop a better understanding of the performance of embankments with geosynthetic reinforcement constructed over rate-sensitive soil. The interaction between reinforcement and prefabricated vertical drains (PVDs) and their effects on time-dependent behaviour of embankments are examined. For rate-sensitive soils, the generation of creep-induced pore pressures following the end of construction is evident along the potential slip surface. As a result, the minimum factor of safety with respect to embankment stability occurs after the end of construction. The combined use of reinforcement and PVDs are shown to provide an effective means of minimizing creep-induced excess pore pressure, increasing overall stability, and decreasing deformation of the embankments. The combined effects of the viscoelastic properties of geosynthetic reinforcement (polyester, polypropylene and polyethylene) and the rate-sensitive nature of foundation soils on the performance of embankments are examined. The effect of various factors, including reinforcement type (i.e., stiffness and viscosity), soil viscosity, construction rate and allowable long-term reinforcement strain, on the time-dependent behaviour of embankments are considered. The long-term performance of reinforced embankments is investigated for different maximum allowable long-term reinforcement strains. From a series of finite element analyses, the ideal allowable reinforcement strains to minimize embankment deformation while providing optimum long-term service height of the embankment, considering the effect of soil and reinforcement viscosity, are proposed for soils similar to those examined in this study. The currently proposed design methods for embankments with creep-susceptible reinforcement over rate-sensitive soils appear to be overly conservative. This study proposes a refined approach for establishing the allowable long-term reinforcement strains that are expected to provide adequate performance while reducing the level of conservativeness of reinforced embankment design. Finally, a previously developed elasto-viscoplastic constitutive model is modified to incorporate the effect of soil structure using a state-dependent fluidity parameter and damage law. The model was evaluated against data from a well-documented case study of a reinforced test embankment constructed on a sensitive Champlain clay deposit in Saint Alban, Quebec. The benefit of basal reinforcement and the effect of reinforcement viscosity are then discussed for these types of soil deposits.
Download or read book Embankments on Organic Soils written by J. Hartlén and published by Elsevier. This book was released on 1996-11-08 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: More and more civil engineering constructions are being built on soft soils. As areas with better foundations are used up the necessity to be able to build structures on soft soils increases.The most troublesome of soft soils are organic soils due mainly to their high compressibility (much higher than in mineral soils), and also their very low shear strength. The large diversity of organic soils with respect to their origin as well as their properties make classification, testing, and engineering prediction of behaviour, very difficult. For this reason, engineers try, in general, to avoid constructing on deep layers of organic soils. If forced, by necessity, to do so, they manage with light structures e.g. embankments or low buildings.The authors of this book have been involved in a joint research project on the testing of embankments on organic soils. This was carried out in the North-Western part of Poland by the Swedish Geotechnical Institute and the Department of Geotechnics of Warsaw Agricultural University.The results of their research is presented in this new book and provides a valuable insight into this growing area in the field of engineering geology.
Download or read book Design and Performance of Embankments on Very Soft Soils written by Marcio de Souza S. Almeida and published by CRC Press. This book was released on 2013-09-03 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: Embankment construction projects on very soft soil often give rise to serious problems. This volume on geotechnics and soft soil engineering therefore treats all phases of the design and construction process exhaustively, from the first investigation step to the monitoring of constructed work. The book presents the development concepts necessary fo
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 Lateral Spreading in Basal Reinforced Embankments Supported by Pile like Elements written by Gourge Samir Fahmi Farag and published by kassel university press GmbH. This book was released on 2008 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Observed Behaviour of a Test Embankment Constructed on Soft Soil written by and published by . This book was released on 1991 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Behaviour of Reinforced Embankments on Soft Rate Sensitive Soils written by R. K. Rowe and published by London : Geotechnical Research Centre, University of Western Ontario. This book was released on 2000 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Behaviour of Reinforced Embankments on Soft Clay written by Jitendrapal Sharma and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Underwater Embankments on Soft Soil written by William F. Van Impe and published by CRC Press. This book was released on 2007-05-10 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ground improvement is an established technique in foundation engineering. In recent decades, modern methods of ground improvement have utilised explosives, impact energy, thermal treatment of the soil, vacuum consolidation, vibratory compaction technologies, stabilization and solidification of soft soils, as well as combined systems of ingenious grouting systems and deep mixing technique. Internationally, deep mixing techniques are often the chosen method for dealing with increasingly-demanding foundation problems. Initial experiences, using inventive new developments of soft soil deep mixing technologies and various advanced high pressure mixing methods, have proved successful both onshore and offshore. This publication illustrates a challenging example, sited in the Port of Antwerp, Belgium, of the design and construction of a large underwater embankment on very soft soil. This text will be a valuable reference case history for the geotechnical engineer, both from the academic's as well as from the practitioner’s point of view.
Download or read book Ground Improvement written by Professor Jian Chu and published by Elsevier. This book was released on 2005-11-07 with total page 1137 pages. Available in PDF, EPUB and Kindle. Book excerpt: - The first book of its kind, providing over thirty real-life case studies of ground improvement projects selected by the worlds top experts in ground improvement from around the globe. - Volume 3 of the highly regarded Elsevier Geo-engineering book series coordinated by the Series Editor: Professor John A Hudson FREng. - An extremely reader friendly chapter format. - Discusses wider economical and environmental issues facing scientists in the ground improvement.Ground improvement has been both a science and art, with significant developments observed through ancient history. From the use of straw as blended infill with soils for additional strength during the ancient Roman civilizations, and the use of elephants for compaction of earth dams during the early Asian civilizations, the concepts of reinforced earth with geosynthetics, use of electrokinetics and thermal modifications of soils have come a long way. The use of large and stiff stone columns and subsequent sand drains in the past has now been replaced by quicker to install and more effective prefabricated vertical drains, which have also eliminated the need for more expensive soil improvement methods.The early selection and application of the most appropriate ground improvement techniques can improve considerably not only the design and performance of foundations and earth structures, including embankments, cut slopes, roads, railways and tailings dams, but also result in their cost-effectiveness. Ground improvement works have become increasingly challenging when more and more problematic soils and marginal land have to be utilized for infrastructure development.This edited compilation contains a collection of Chapters from invited experts in various areas of ground improvement, who have illustrated the basic concepts and the applications of different ground improvement techniques using real projects that they have been involved in. The case histories from many countries ranging from Asia, America, Australia and Europe are addressed.
Download or read book Limited Life Basal Reinforcement for an Embankment Built on Saturated Soft Clay written by Abrahams Patton Mwasha and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Modelling of Embankments on Soft Soils written by Harald Krenn and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design of embankments on soft soils requires a reliable estimate of deformations and stability of the embankment. Natural soft soils are structured materials, and as a consequence they exhibit anisotropy in their stress-strain-strength behaviour. The complex nature of soft soil makes it very difficult for designers to estimate deformations during construction and over time. The properties of very soft clays, silts and organic soils can be improved with deep mixing. Conventional design methods are very limited and do not account for the complex stress-strain-strength behaviour of the soft soil and/or the deep mixed soil. Numerical techniques, such as the finite element method provide a powerful tool, given the complex stress-strain-strength behaviour of the soft soil and/or the deep mixed material can be taken into account using advanced constitutive models. The aim of the thesis is to investigate through 2D and 3D numerical simulations using advanced constitutive models the behaviour of embankments constructed on soft clays. In addition to embankments constructed on natural soils, embankments on deep mixed columns are studied. Simulations investigate the effect of anisotropy, apparent interparticle bonding and destructuration on the predicted response. It was found that ignoring anisotropy and destructuration leads to underprediction of surface settlements and horizontal displacements. However, although the effect of anisotropy was more pronounced than the effect of destructuration, the latter is needed to represent the measured remoulded and natural undrained strength in time. Constitutive models with a hyperbolic stress-strain relationship give a good representation of the non-linear behaviour of deep mixed material. 3D simulations of embankments on deep mixed columns showed that with increasing column spacing, differential settlements occur between column and soil. The results furthermore demonstrate that floating columns can be very effective in settlement reduction.
Download or read book Analysis of Reinforced Embankments on Soft Soil written by Smita Narayan and published by . This book was released on 2000 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards written by and published by . This book was released on 2001 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theses on any subject submitted by the academic libraries in the UK and Ireland.
Download or read book Reinforced soil Embankment on Soft Foundation written by Tien H. Wu and published by . This book was released on 2000 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: A section of I-670 in Columbus, OH, constructed during 1997-1998, includes a 33 ft. (l0 m) high embankment over a deposit of very soft sludge. The design used geosynthetics for reinforcement of the embankment and wick drains to accelerate the consolidation in the sludge. Stage construction was used to allow consolidation of the sludge. To verify the design assumptions, a test embankment was completed in 1993. The performance of the test embankment provided the information for the design of the full scale embankment. This project provided the opportunity to demonstrate the application of research findings from the test embankment to actual design and construction. The objective was to demonstrate how research findings can be used in design and construction. This report shows (1) how the results of the test embankment were used in the design of the full-scale embankment and prediction of the embankment performance, (2) how observation of the embankment performance can be used as construction control and (3) how the results can be used in future application of similar technology.
