Download or read book Capacity of Laterally Loaded Shafts Constructed Behind the Face of a Mechanically Stabilized Earth Block Wall written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Mechanically stabilized earth (MSE) walls are an inexpensive and aesthetically attractive means of retaining soil. While the design principles for MSE structures have been accepted for several decades, space restrictions at MSE wall sites have led to new demands on MSE wall structures to support laterally loaded deep foundation elements constructed within the reinforced mass. Current design procedures for such configurations are by necessity based on very conservative design assumptions due to the lack of test data. This report contains estimates of the capacity of concrete columns, commonly referred to as drilled shafts, constructed behind the facing of a mechanically stabilized earth wall within the reinforced mass. This is the first of two reports on this topic and contains design capacity recommendations for 36 inch diameter shafts constructed behind an MSE wall with a height of 20 feet based on full scale field testing. It also contains recommendations for P-Y curve analyses for similar wall-shaft configurations. These recommendations and a discussion of their development were prepared by Dan Brown and Associates and are presented in Appendix B. The second report will contain capacity recommendations for walls and shafts with a range of heights and diameters based on computer models calibrated with the field data reported herein. A 20 foot tall, 140 foot long MSE block wall was built in accordance with AASHTO and KDOT specifications using the Mesa system developed by Tensar International. The wall supported eight 36 inch diameter vertical shafts constructed at four different distances from the back of the facing to the center of the shaft. These shafts were then loaded toward the wall facing using a displacement control method. The shafts and wall were monitored using multiple methods as each shaft was loaded to failure. Shafts were determined to have substantial lateral capacity, with capacity and width of shaft influence increasing as the distance of the shaft from the wall increased. The wall facing was very effective at concealing large deformations. Cracks appeared at the back of the reinforcement, suggesting that additional capacity may be achieved by lengthening the reinforcement. Recommendations for design lateral shaft capacities based on ultimate shaft load and on allowable deformations are presented in Chapter Five of this report"--Technical report documentation page.
Download or read book Advances in Geo Science and Geo Structures written by Awdhesh Kumar Choudhary and published by Springer Nature. This book was released on 2021-07-12 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents select proceedings of the National conference on Geo-Science and Geo-Structures (GSGS 2020). It provides sustainable solutions to various challenges encountered in the field of geotechnical engineering. The topics presented include advanced characterization to study the behavior of geomaterials, shallow and deep foundations including tunneling, use of geosynthetics and other soil reinforcing materials in minimizing slope failures and landslides, dynamics of soils and foundations, and its connection with energy geotechnics, transportation geotechnics, and offshore geotechnics. The book further highlights various aspects of ground improvement techniques by incorporating the use of industrial by-products, forensic analyses of geo-structures, instrumentation and sensing techniques in geotechnical engineering and issues associated with geo-environmental engineering. The book will be a valuable reference for budding researchers, academicians, practitioners and policymakers interested in sustainable practices associated with geotechnical engineering and related domains.
Download or read book Modeling of Laterally Loaded Drilled Shaft Within an MSE Wall Under Cyclic Loading written by Md. Saidur Rahman and published by . This book was released on 2013 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Interaction Between Drilled Shaft and Mechanically Stabilized Earth MSE Wall written by J.-L. Briaud and published by . This book was released on 2017 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drilled shafts are being constructed within the reinforced zone of mechanically stabilized earth (MSE) walls especially in the case of overpass bridges where the drilled shafts carry the bridge deck or traffic signs. The interaction between the drilled shaft and the MSE wall is not well known and not typically incorporated into the design. As part of the research project, a full-scale test was conducted in 2012 at Texas A&M University. The test was performed on an MSE wall where the backfill material was clean sand and the soil reinforcement was made of metal strips. Also two real projects w ere instrumented during construction, and data were gathered for one year. A numerical model was used and calibrated against the results of the three full-scale cases. Then a sensitivity analysis was performed and 64 numerical cases were modeled to understand the effect of different parameters on the interaction between the MSE wall and the drilled shaft. The data from the simulations, the full-scale test results, and the monitoring of the real site were processed, and a modification of the current guidelines was proposed for the case where there is a drilled shaft subjected to a horizontal load in the reinforced zone of the MSE wall. A design chart is presented to take into account the addidtional pressure on the wall created by the drilled shaft.
Download or read book Drilled Shaft Manual Structural analysis and design for lateral loading by written by Lymon C. Reese and published by . This book was released on 1977 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drilled shafts have been used on a limited scale for many years as an alternative to driven piles in a variety of foundation problems. However, uncertainty about the behavior of the drilled shaft has forestalled widespread adoption. The subject package, by Dr. Lymon C. Reese of the University of Texas, is intended for use by bridge engineers, geotechnical engineers, and builders of pile foundations. The manual contains rational procedures and practical guidelines for the design and construction of drilled shaft foundations. Volume I presents a rational design procedure for drilled shafts under axial loading and includes guidelines on construction methods, inspection, load testing, specifications, and cost estimates. Volume II presents alternative methods for computing the response of the shaft to lateral loading and presents the structural design of the shaft for axial and/or lateral loading.
Download or read book Drilled Shaft Design and Construction Guidelines Manual Reese L C and Allen J D Structural analysis and design for lateral loading written by Lymon C. Reese and published by . This book was released on 1977 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geo Congress 2013 Stability and Performance of Slopes and Embankments III written by Christopher L. Meehan and published by . This book was released on 2013-03-01 with total page 2280 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Geotechnical Special Publication contains 229 peer-reviewed technical papers and case studies focusing on the stability, performance, and rehabilitation of slopes, embankments, and dams. Topics include: exploration and characterisation of soil and rock slopesdesign, analysis, and performance of slopesmonitoring and inspection of slopeshazard assessment and managementground improvement and stabilisation in the repair and remediation of slopes. These papers are valuable to geotechnical researchers and practicing engineers, especially those interested in the design and maintenance of slopes, embankments and dams.
Download or read book Lateral Load Capacity of Drilled Shafts in Jointed Rock written by Albert Chi Fu To and published by . This book was released on 1999 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Drilled Shaft Manual Construction procedures and design for axial loading written by Lymon C. Reese and published by . This book was released on 1977 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drilled shafts have been used on a limited scale for many years as an alternative to driven piles in a variety of foundation problems. However, uncertainty about the behavior of the drilled shaft has forestalled widespread adoption. The subject package, by Dr. Lymon C. Reese of the University of Texas, is intended for use by bridge engineers, geotechnical engineers, and builders of pile foundations. The manual contains rational procedures and practical guidelines for the design and construction of drilled shaft foundations. Volume I presents a rational design procedure for drilled shafts under axial loading and includes guidelines on construction methods, inspection, load testing, specifications, and cost estimates. Volume II presents alternative methods for computing the response of the shaft to lateral loading and presents the structural design of the shaft for axial and/or lateral loading.
Download or read book Experimental Study of Undrained Lateral and Moment Behavior of Drilled Shafts During Static and Cyclic Loading written by P. W. Mayne and published by . This book was released on 1992 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lateral Load Test of a Drilled Shaft in Clay written by Vernon R. Kasch and published by . This book was released on 1977 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geosynthetic Reinforced Soil GRS Walls written by Jonathan T. H. Wu and published by John Wiley & Sons. This book was released on 2019-07-10 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book to provide a detailed overview of Geosynthetic Reinforced Soil Walls Geosynthetic Reinforced Soil (GRS) Walls deploy horizontal layers of closely spaced tensile inclusion in the fill material to achieve stability of a soil mass. GRS walls are more adaptable to different environmental conditions, more economical, and offer high performance in a wide range of transportation infrastructure applications. This book addresses both GRS and GMSE, with a much stronger emphasis on the former. For completeness, it begins with a review of shear strength of soils and classical earth pressure theories. It then goes on to examine the use of geosynthetics as reinforcement, and followed by the load-deformation behavior of GRS mass as a soil-geosynthetic composite, reinforcing mechanisms of GRS, and GRS walls with different types of facing. Finally, the book finishes by covering design concepts with design examples for different loading and geometric conditions, and the construction of GRS walls, including typical construction procedures and general construction guidelines. The number of GRS walls and abutments built to date is relatively low due to lack of understanding of GRS. While failure rate of GMSE has been estimated to be around 5%, failure of GRS has been found to be practically nil, with studies suggesting many advantages, including a smaller susceptibility to long-term creep and stronger resistance to seismic loads when well-compacted granular fill is employed. Geosynthetic Reinforced Soil (GRS) Walls will serve as an excellent guide or reference for wall projects such as transportation infrastructure—including roadways, bridges, retaining walls, and earth slopes—that are in dire need of repair and replacement in the U.S. and abroad. Covers both GRS and GMSE (MSE with geosynthetics as reinforcement); with much greater emphasis on GRS walls Showcases reinforcing mechanisms, engineering behavior, and design concepts of GRS and includes many step-by-step design examples Features information on typical construction procedures and general construction guidelines Includes hundreds of line drawings and photos Geosynthetic Reinforced Soil (GRS) Walls is an important book for practicing geotechnical engineers and structural engineers, as well as for advanced students of civil, structural, and geotechnical engineering.
Download or read book Drilled Shafts written by Michael W. O'Neill 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 Design Construction and Analysis of a Laterally loaded Drilled Shaft written by John N. Cunningham and published by . This book was released on 1984 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Earth Retention Systems Handbook written by Alan Macnab and published by McGraw Hill Professional. This book was released on 2002-04-09 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents a systematic and comprehensive presentation of temporary excavation shoring and earth retention systems used to construct permanent facilities inside them. These systems are used to construct underground pipelines, tunnels, tank and storage facilities, foundations and structures. Each chapter presents a shoring system type description, how it is constructed, equipment requirements, cost analysis, etc. Safety, inspection and testing codes and methods included throughout.
Download or read book Laterally Loaded Drilled Shafts from Full Scale Field Tests written by Sarah A. Myers and published by . This book was released on 2014 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current engineering guidelines of drilled shafts subject to lateral loading contain numerous approximations leading to design issues faced by the Missouri Department of Transportation (MoDOT). In designing deep foundations it is important to understand the behavior of drilled shafts under lateral loading. The objective of the research is to develop the "true" drilled shafts response to lateral loading by conducting full-scale field tests. Twenty-five drilled shafts were constructed at two sites in Missouri as part of a previous "geotechnical thrust" research program. In order to measure the response of the foundations to static lateral loading, sixteen full-scale lateral load field tests were performed on the drilled shafts. All the tests were conducted in pairs therefore two foundations were loaded and monitored simultaneously. The data acquired from the field load tests were reduced and analyzed following conventional data reduction procedures to establish the observed lateral response of the drilled shafts in terms of load and deflection. The measured load-displacement curves were compared to the predicted loaddisplacement curves used by the commercial software program L-Pile. The data also allowed characterizing the variability and uncertainty involved with the prediction of the lateral response of drilled shafts.
Download or read book Determining the Optimum Depth of Drilled Shafts Subject to Combined Torsion and Lateral Loads in Saturated Sand from Centrifuge Testing written by Zhihong Hu and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: My study is part of a project sponsored by the Florida Department of Transportation to determine the optimum embedment depths for drilled shaft foundations subject to a combination of torque and lateral load. I investigated the effect of wet hole construction, supplementing previous research based on the dry shaft construction method. My study includes a series of load tests in the centrifuge on scaled models of a single-mast-arm traffic sign resting on a drilled shaft foundation. I focused on the impact on the foundation?s capacity of soil density, length of embedment to diameter ratio, torque-to-lateral-load ratio, and the type of slurry used in the construction process. In addition, a prediction model was developed on the basis of the results obtained from the centrifuge tests, which provides an estimate of the torsional capacity of the drilled shaft, and the reduced lateral capacity as the torque-to-lateral-load ratio increases. The recommended design load was given by the lesser of the above two capacities.
