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Performance Of Recycled Plastic Pins For Increasing Bearing Capacity Of Foundation Soil
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Book Synopsis Performance of Recycled Plastic Pins for Increasing Bearing Capacity of Foundation Soil by : Faria Fahim Badhon
Download or read book Performance of Recycled Plastic Pins for Increasing Bearing Capacity of Foundation Soil written by Faria Fahim Badhon and published by . This book was released on 2022 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanically Stabilized Earth (MSE) walls constructed on unsuitable foundation soil are prone to large deformation and bearing capacity failure. A variety of techniques can be applied to address this issue, such as removal and replacement of existing soil with competent soil, staged construction, dynamic compaction, stone columns, geosynthetic reinforcement. One common traditional approach followed by Texas Department of Transportation (TxDOT)for the improvement of unsuitable foundation soil is removal of the in-situ soil and replacement with suitable fill material. However, this method can be time-consuming and expensive. A pile-supported system in combination with geosynthetic reinforcement can provide a sustainable solution for ground improvement. The use of Recycled Plastic Pins (RPPs) can be a viable alternative to other conventionally used piles. So, to minimize construction time and cost, the use of RPPs for ground improvement needs to be evaluated as an effective and sustainable technique. The objective of this study is to assess the effectiveness of RPPs for improving unsuitable foundation soil. An extensive field-testing program was conducted on RPP reinforced soil. Four identical test sections were constructed; among which three were reinforced with RPPs having different sizes and spacings, and the fourth one was left unreinforced to use as a control section. Performance monitoring for all four test sections was conducted using inclinometer and pressure plates for more than two years. The field monitoring data indicated that the settlement of the reinforced section was reduced up to 84%,and RPPs were carrying 78% of the total surcharge load. Based on the available field data,RPPs show a promising potential for improving the unsuitable foundation soil.The performance of the test sections was further evaluated in numerical modeling using finite element software PLAXIS 2D. A parametric study was conducted using the calibrated model to evaluate the effect of foundation and backfill soil strength, RPP size, and spacing on settlement and pressure distribution of the RPP reinforced system. Finite element studies showed that larger cross-sections and closer spacing of RPPs provided better resistance.Settlement, stress reduction ratio, and stress concentration ratio prediction models were developed using the modeling results will help determining the settlement and pressure distribution of RPP reinforced foundation. Based on the performance monitoring results and further analyses, it can be concluded that the RPPs can be effectively used to increase the bearing capacity of MSE wall foundation.
Book Synopsis Sustainable Ground Improvement Method Using Recycled Plastic Pins by : Md Nur Basit Zaman
Download or read book Sustainable Ground Improvement Method Using Recycled Plastic Pins written by Md Nur Basit Zaman and published by . This book was released on 2019 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: Failure of civil engineering infrastructures due to insufficient bearing and shearing capacity of the unsuitable foundation soil is a common problem in the area of North Texas which results in significant maintenance issues for the Texas Department of Transportation (TxDOT). The major concerns regarding construction over such foundation soil includes excessive total and differential settlement of footing resulting in bearing capacity failure and sliding failure of the Mechanically Stabilized Earth (MSE) retaining structure due to inadequate shear resistance. The most common technique followed by TxDOT to counter such problem is to remove and replace the existing soil with appropriate fill material. However, the excessive cost associated with the remove and replace method led to numerous research to develop sustainable alternative solution. A noble approach to improve the problematic soil could be the use of Recycled Plastic Pin (RPP). RPP is a lightweight material, produced from recycled plastics and other waste materials. It is more durable against chemical and biological degradation compared to other alternatives (e.g. concrete pile or timber pile). The current study summarizes the development of an alternative sustainable solution to the bearing capacity failure by excessive settlement of the structures and sliding failure due to lack of sufficient shear resistant at the base of MSE wall. RPPs provide with additional support to the structures (e.g. embankments) when driven into the weak foundation soil in addition to a layer of geogrid. Geogrid acts as load transfer device which ensures transfer of fill load to the RPP by soil arching effect. The RPP reinforcement in combination to geosynthetic helps to reduce both total and differential settlement of the structure by improving the weak foundation soil. Three identical 6ft. height embankment loading test sections of 15 ft. x 15 ft. were constructed in phase - I; one as control section (without any RPP) while the other two sections were instrumented with 10 ft. long RPP of 4 in. x 4 in. and 6 in. x 6 in. sizes respectively. Based on the field monitoring results, settlement for the control section was found to be about 2.01 inches, while due to the use of 4 in. x 4 in. and 6 in. x 6 in. RPP reinforcement, a reduction in settlement of about 60% and 70% compared to the control section was noticed respectively. As a part of phase -II construction and monitoring, one control section and one 4 in. x 4 in. RPP reinforced section was constructed, and the result was found to be in good agreement with the phase - I observation.The study also endeavored to focus on increasing shear resistance of the base of MSE wall constructed on stiff foundation soil against sliding failure by utilizing RPP similar to a shear key. The research included construction of two identical MSE wall test sections of 24 ft. long and loaded with a backfill soil height of 4 ft.; one had a foundation reinforced with 10 ft. long 4 in. x 4 in. RPP at 3 ft. c/c spacing while the other section served as a control section. The performance monitoring result showed significant lateral movement for the control section (3.8 inches), while almost no movement was observed for the reinforced section. For further evaluation, an increased backfill loading height of 5 ft. showed a lateral movement of 1.76 inches for the control section which was found to be reduced by about 80% (0.29 inches) for the RPP reinforced section.The performance of the test sections was further evaluated in numerical modeling using finite element software PLAXIS 2D and a parametric study was conducted using the calibrated model to evaluate effect of RPP size, length and spacing for both cases. The parametric study indicated that the both vertical and lateral deformation decreases with larger RPP size and narrower RPP spacing. Based on the field monitoring results and FEM analysis, RPPs are expected to be an efficient and cost effective reinforcing material for ground improvement.
Book Synopsis Evaluation of Recycled Plastic Pins as Shear Keys in MSE Wall Base by : Prabesh Bhandari
Download or read book Evaluation of Recycled Plastic Pins as Shear Keys in MSE Wall Base written by Prabesh Bhandari and published by . This book was released on 2021 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanically Stabilized Earth (MSE) walls have been widely used as retaining structures due to their flexible nature, a better tolerance against differential settlement, and many other factors. However, external stability problems of MSE walls have been an issue in North Texas over decades. Lateral displacement of the wall occurs, giving rise to sliding failure, when there is insufficient shear strength at the wall base to produce adequate frictional resistance. Such failures can cause significant maintenance, repair, and cost implications for the state department of transportation.Furthermore, MSE walls also undergo global failure due to weak soil conditions along with high lateral pressures. Typical recommended solutions consist of either increasing the weight of the wall, increasing the length of the heel slab, or using wall anchors and helical tiebacks, which are all expensive. On the other hand, incorporating a shear key at the wall base has proven to completely restrict the lateral sliding of walls. However, for MSE retaining structures, incorporating a concrete shear key is challenging due to its expensive cost and rigid nature, which undermines the most important feature of an MSE wall which is the flexible nature of its base. A possible solution could be using recycled plastic pins (RPP) as shear keys. The success of RPPs in providing sufficient lateral support to sliding soil mass in slopes could be imitated in an MSE wall to deliver the required lateral resistance against sliding. As the RPPs are made from recycled plastics, they are highly cost-saving when compared to concrete. They are comparatively flexible in nature and require almost no maintenance.The main objective of the study is to investigate the effectiveness of RPPs in increasing the lateral stability of MSE wall system. Four test sections were constructed, out of which three were reinforced with 10 ft. long RPPs at the wall base. One test section was left unreinforced as a control section. The three test sections were reinforced with 4x4 inches RPP at 3 ft. c/c, 4x4 inches RPP at 2 ft. c/c, and 6x6 inches RPP at 3 ft. c/c. The RPPs inside the wall were extended 2 ft. above the foundation into the reinforced zone. Two rows of RPPs were installed fully flushed to the ground surface in front of the test wall. Vertical and horizontal inclinometer casings along with earth pressure plates were used to monitor the performance of the test sections over a period of almost two years.The field results showed that the lateral resistance of the RPP reinforced sections increased by 75% to 89% in comparison to the control section. The control section failed about 8 months after construction, while the RPP reinforced sections were stable. The vertical settlement of the RPP reinforced sections decreased by 48% to 68% in comparison to the control section, while the maximum lateral earth pressure reduced by 66% to 76% in the RPP reinforced sections. Finite element studies in PLAXIS 2D showed that larger cross-section and closer spacing of RPPs provided better lateral resistance.Lateral displacement and lateral stress reduction prediction models were developed using the modeling results. Based on the performance monitoring results and further analyses, it can be concluded that the RPPs can be effectively used as shear keys in MSE walls. They can be incorporated at the wall base during design for improving the lateral resistance of MSE walls.
Book Synopsis Driveability of Recycled Plastic Pin (RPP) in North Texas by : Arif Mohammad Aziz
Download or read book Driveability of Recycled Plastic Pin (RPP) in North Texas written by Arif Mohammad Aziz and published by . This book was released on 2020 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Recycled Plastic Pins (RPP) have been extensively used as an alternative to the conventional slope stabilization methods in stabilizing shallows slope failure in Texas, Missouri, Kansas, and Idaho in the United States. The RPP provides additional resistance along the potential slip surface when it is driven into the slope and increases the factor of safety. RPPs are fabricated from recycled plastics and waste materials (i.e. polymers, sawdust, and fly ash), and is nondegradable in nature. It is found to be very useful and beneficial engineering materials for civil engineering infrastructure projects. The cost-effectiveness of using any engineering material largely depends on the efficacy of the project planning where proper scheduling based on the estimation of time is a prime aspect. Although several studies have been conducted to estimate the driving rate of piles using wave equation analysis, static resistance to driving, and dynamic soil properties, no study has been performed to estimate the driving rate of RPPs based on different soil properties. Also the comprehensive understanding of the interaction between RPP and soil properties while driving would assist in bringing about an optimized design method for slope stabilization. Hence, a better understanding of the interconnection between the RPP driving rate and soil properties is an essence. Therefore, the objective of this study is to evaluate the driving rate of RPP based on different soil parameters. The influences of soil properties on RPP driving rate were studied in detailed manner in the present research. The considered soil properties were natural moisture content, dry density, plasticity index, and cohesion. Also the influence of standard penetration test (SPT) value of soil on driving rate of RPP was examined. The driving time and rate along with soil properties utilized in this study were assembled from the studies conducted by Khan (2013), Tamrakar (2015), Zaman (2019), and Sapkota (2019). The data were also collected directly from different sites in Irving and Arlington where RPPs were used for different engineering applications. Based on the analyses, it was found that the driving rate increased with an increase in natural moisture content and plasticity index while it decreased with the increase in dry density, cohesion, and SPT value of soil.
Book Synopsis Soil Testing, Soil Stability and Ground Improvement by : Wissem Frikha
Download or read book Soil Testing, Soil Stability and Ground Improvement written by Wissem Frikha and published by Springer. This book was released on 2017-07-11 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthwork projects are critical components in civil construction and often require detailed management techniques and unique solution methods to address failures. Being earth bound, earthwork is influenced by geomaterial properties at the onset of a project. Hence, an understanding of the in-situ soil properties is essential. Slope stability is a common problem facing earthwork construction, such as excavations and shored structures. Analytical methods for slope stability remain critical for researchers due to the mechanical complexity of the system. Striving for better earthwork project managements, the geotechnical engineering community continues to find improved testing techniques for determining sensitive properties of soil and rock, including stress-wave based, non-destructive testing methods. To minimize failure during earthwork construction, past case studies and data may reveal useful lessons and information to improve project management and minimize economic losses. This volume is part of the proceedings of the 1st GeoMEast International Congress and Exhibition on Sustainable Civil Infrastructures, Egypt 2017.
Book Synopsis Principles and Practice of Ground Improvement by : Jie Han
Download or read book Principles and Practice of Ground Improvement written by Jie Han and published by John Wiley & Sons. This book was released on 2015-06-22 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gain a stronger foundation with optimal ground improvement Before you break ground on a new structure, you need to analyze the structure of the ground. Expert analysis and optimization of the geo-materials on your site can mean the difference between a lasting structure and a school in a sinkhole. Sometimes problematic geology is expected because of the location, but other times it's only unearthed once construction has begun. You need to be able to quickly adapt your project plan to include an improvement to unfavorable ground before the project can safely continue. Principles and Practice of Ground Improvement is the only comprehensive, up-to-date compendium of solutions to this critical aspect of civil engineering. Dr. Jie Han, registered Professional Engineer and preeminent voice in geotechnical engineering, is the ultimate guide to the methods and best practices of ground improvement. Han walks you through various ground improvement solutions and provides theoretical and practical advice for determining which technique fits each situation. Follow examples to find solutions to complex problems Complete homework problems to tackle issues that present themselves in the field Study design procedures for each technique to simplify field implementation Brush up on modern ground improvement technologies to keep abreast of all available options Principles and Practice of Ground Improvement can be used as a textbook, and includes Powerpoint slides for instructors. It's also a handy field reference for contractors and installers who actually implement plans. There are many ground improvement solutions out there, but there is no single right answer to every situation. Principles and Practice of Ground Improvement will give you the information you need to analyze the problem, then design and implement the best possible solution.
Book Synopsis Pile Design and Construction Practice by : Willis H. Thomas
Download or read book Pile Design and Construction Practice written by Willis H. Thomas and published by CRC Press. This book was released on 2007-12-06 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: This international handbook is essential for geotechnical engineers and engineering geologists responsible for designing and constructing piled foundations. It explains general principles and practice and details current types of pile, piling equipment and methods. It includes calculations of the resistance of piles to compressive loads, pile group
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.
Book Synopsis Rainfall-induced Slope Failures by :
Download or read book Rainfall-induced Slope Failures written by and published by . This book was released on 2000 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Soil Improvement and Ground Modification Methods by : Peter G. Nicholson
Download or read book Soil Improvement and Ground Modification Methods written by Peter G. Nicholson and published by Butterworth-Heinemann. This book was released on 2014-08-29 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by an author with more than 25 years of field and academic experience, Soil Improvement and Ground Modification Methods explains ground improvement technologies for converting marginal soil into soil that will support all types of structures. Soil improvement is the alteration of any property of a soil to improve its engineering performance. Some sort of soil improvement must happen on every construction site. This combined with rapid urbanization and the industrial growth presents a huge dilemma to providing a solid structure at a competitive price. The perfect guide for new or practicing engineers, this reference covers projects involving soil stabilization and soil admixtures, including utilization of industrial waste and by-products, commercially available soil admixtures, conventional soil improvement techniques, and state-of-the-art testing methods. Conventional soil improvement techniques and state-of-the-art testing methods Methods for mitigating or removing the risk of liquefaction in the event of major vibrations Structural elements for stabilization of new or existing construction industrial waste/by-products, commercially available soil Innovative techniques for drainage, filtration, dewatering, stabilization of waste, and contaminant control and removal
Book Synopsis Design Guideline Basal Reinforced Piled Embankments by : Suzanne J.M. van Eekelen
Download or read book Design Guideline Basal Reinforced Piled Embankments written by Suzanne J.M. van Eekelen and published by CRC Press. This book was released on 2016-09-01 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: A basal reinforced piled embankment consists of a reinforced embankment on a pile foundation. The reinforcement consists of one or more horizontal layers of geosynthetic reinforcement installed at the base of the embankment. A basal reinforced piled embankment can be used for the construction of a road or a railway when a traditional construction method would require too much construction time, affect vulnerable objects nearby or give too much residual settlement, making frequent maintenance necessary. This publication is a guideline (CUR226) for the design of basal reinforced piled embankments. The guideline covers the following subjects: a survey of the requirements and the basic principles for the structure as a whole; some instructions for the pile foundation and the pile caps; design rules for the embankment with the basal geosynthetic reinforcement; extensive calculation examples; finite element calculations; construction details and management and maintenance of the piled embankment. The guideline includes many practical tips. The design guideline is based on state-of-the-art Dutch research, which was conducted in cooperation with many researchers from different countries.
Author :Sahadat Hossain Publisher :CRC Press, Taylor & Francis Group, CRC Press is ISBN 13 :9781138636101 Total Pages :0 pages Book Rating :4.6/5 (361 download)
Book Synopsis Sustainable Slope Stabilisation Using Recycled Plastic Pins by : Sahadat Hossain
Download or read book Sustainable Slope Stabilisation Using Recycled Plastic Pins written by Sahadat Hossain and published by CRC Press, Taylor & Francis Group, CRC Press is. This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, every detail of the slope stabilisation technique using recycled plastic pin, including the design techniques, construction methods and several case studies, are included.
Book Synopsis Bulletin of the Atomic Scientists by :
Download or read book Bulletin of the Atomic Scientists written by and published by . This book was released on 1972-10 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Book Synopsis The Deep Mixing Method by : Masaki Kitazume
Download or read book The Deep Mixing Method written by Masaki Kitazume and published by CRC Press. This book was released on 2013-02-21 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Deep Mixing Method (DMM), a deep in-situ soil stabilization technique using cement and/or lime as a stabilizing agent, was developed in Japan and in the Nordic countries independently in the 1970s. Numerous research efforts have been made in these areas investigating properties of treated soil, behavior of DMM improved ground under static and d
Book Synopsis Geotechnical Instrumentation for Monitoring Field Performance by : John Dunnicliff
Download or read book Geotechnical Instrumentation for Monitoring Field Performance written by John Dunnicliff and published by John Wiley & Sons. This book was released on 1993-10-06 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book on the subject written by a practitioner forpractitioners. Geotechnical Instrumentation for Monitoring FieldPerformance Geotechnical Instrumentation for Monitoring FieldPerformance goes far beyond a mere summary of the technicalliterature and manufacturers’ brochures: it guides readersthrough the entire geotechnical instrumentation process, showingthem when to monitor safety and performance, and how to do it well.This comprehensive guide: * Describes the critical steps of planning monitoring programsusing geotechnical instrumentation, including what benefits can beachieved and how construction specifications should bewritten * Describes and evaluates monitoring methods and recommendsinstruments for monitoring groundwater pressure, deformations,total stress in soil, stress change in rock, temperature, and loadand strain in structural members * Offers detailed practical guidelines on instrument calibrations,installation and maintenance, and on the collection, processing,and interpretation of instrumentation data * Describes the role of geotechnical instrumentation during theconstruction and operation phases of civil engineering projects,including braced excavations, embankments on soft ground,embankment dams, excavated and natural slopes, undergroundexcavations, driving piles, and drilled shafts * Provides guidelines throughout the book on the best practices
Download or read book Backpacker written by and published by . This book was released on 2007-09 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Backpacker brings the outdoors straight to the reader's doorstep, inspiring and enabling them to go more places and enjoy nature more often. The authority on active adventure, Backpacker is the world's first GPS-enabled magazine, and the only magazine whose editors personally test the hiking trails, camping gear, and survival tips they publish. Backpacker's Editors' Choice Awards, an industry honor recognizing design, feature and product innovation, has become the gold standard against which all other outdoor-industry awards are measured.
Book Synopsis Building Adaptation by : James Douglas
Download or read book Building Adaptation written by James Douglas and published by Routledge. This book was released on 2006-08-11 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: As existing buildings age, nearly half of all construction activity in Britain is related to maintenance, refurbishment and conversions. Building adaptation is an activity that continues to make a significant contribution to the workload of the construction industry. Given its importance to sustainable construction, the proportion of adaptation works in relation to new build is likely to remain substantial for the foreseeable future, especially in the developed parts of the world. Building Adaptation, Second Edition is intended as a primer on the physical changes that can affect older properties. It demonstrates the general principles, techniques, and processes needed when existing buildings must undergo alteration, conversion, extension, improvement, or refurbishment. The publication of the first edition of Building Adaptation reflected the upsurge in refurbishment work. The book quickly established itself as one of the core texts for building surveying students and others on undergraduate and postgraduate built environment courses. This new edition continues to provide a comprehensive introduction to all the key issues relating to the adaptation of buildings. It deals with any work to a building over and above maintenance to change its capacity, function or performance.