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 0 6715 Interaction Between Drilled Shaft and Mechanically Stabilized Earth MSE Wall written by J.-L. Briaud and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 0 6715 Interaction Between Drilled Shaft and Mechanically Stabilized Earth MSE Wall written by J.-L. Briaud and published by . This book was released on 2016 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Modeling of Laterally Loaded Drilled Shafts Behind Mechanically Stabilized Earth Block Walls written by Matthew Pierson and published by . This book was released on 2011 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanically stabilized earth (MSE) walls are recognized as a cost effective earth retention technology. In some cases structural foundations must pass through the reinforced fill due to the required footprint of the reinforced zone behind the facing. Limited information about the interaction between the structure and the MSE mass has been published, making efficient design difficult. It would be prohibitively expensive to construct and test all possible geometries or applications; therefore numerical modeling must be used to supplement physical data. This report contains a discussion of the analysis of physical test data and numerical modeling of an MSE test wall containing foundation elements. The test wall consists of an MSE wall with cast-in-place shafts contained within and solely supported by the reinforced fill. The finite difference numerical modeling program FLAC3D was used for analysis. A parametric study was conducted to determine how the various constituents of the physical wall as well as wall height affect wall-shaft behavior. Geogrid properties, particularly stiffness, were found to have the greatest influence on behavior. Wall height has a large influence on capacity at shaft movement of more than 2 inches. Analyses of the modeling results were used to create design recommendations for MSE walls with foundation elements.

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 Soil geosynthetic Reinforcement Interaction for Mechanically Stabilized Earth MSE Wall Systems written by Fernando Navarrete and published by . This book was released on 2001 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reliability Analysis of Mechanically Stabilized Earth MSE Walls written by Tanit Chalermyanont and published by . This book was released on 2002 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recommendations for Design and Analysis of Earth Structures using Geosynthetic Reinforcements EBGEO written by Deutsche Gesellschaft für Geotechnik and published by John Wiley & Sons. This book was released on 2012-01-09 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: The completely revised and extended Recommendations deal with all questions relevant to the planning and dimensioning of geosynthetics-reinforced earth structures. In addition to the demands on materials and analysis principles, the applications of geosynthetics in a range of foundation systems, ground improvement measures, highways engineering projects, in slopes and retaining structures, and in landfill engineering are discussed. The Recommendations have been supplemented by the following sections: - reinforced earth structures over point or linear bearing elements, - foundation systems using geotextile-encased columns, - bridging subsidence, - dynamic actions of geosynthetic-reinforced systems. The remaining sections have been fundamentally revised and updated in line with current standards and codes of practice.

Download or read book Predicting the Behavior of a Drilled Shaft Wall Retaining Highly Expansive Soil written by Ali Mohamed Helwa and published by . This book was released on 2016 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: A full scale drilled shaft retaining wall was constructed in the highly expansive soil of Manor, Texas, to advance our understanding of the behavior of walls in highly expansive soils. The wall was monitored for a total period of four years; during the monitored period the state of Texas experienced severe drought conditions and the retained soil was inundated via a manmade pond. The monitored wall did not experience a point of fixity, instead, the wall experienced global movement towards the excavated side. Analytical predictions of the wall during short-term and long-term conditions miss-predicted the deflection and bending moment profiles, and could not estimate the wall behavior during transition state towards the long-term conditions. The Reese wall was simulated in a numerical model using the Finite Element method. A framework is developed in this study that can describe the swelling behavior of soil. The framework relies on two soil properties, first, a relationship between effective degree of saturation and effective stress, second, a relationship between stiffness, effective stress and voids ratio. Comparison between measured and predicted deflection and bending moment profiles showed that the proposed framework could result in reasonable deflection and bending moment predictions during dry and inundated saturation conditions. The predicted short-term deflection and bending moment profiles best matched the measured profiles when a constitutive model that accounts for small strain stiffness nonlinearity was adopted. The numerical model was used to segregate the superimposed wall deflection profile obtained during long-term conditions. The study concluded that the short-term conditions accounts for 20%, dissipation of the excess pore-pressures accounts for 30%, the additional hydrostatic pressures accounts for 10%, saturation change related factors accounts for 15%, and change in soil properties on the excavation side accounts for 25% of the total deflection. Parametric analyses concluded that the short -term and long-term behaviors of the Reese wall are not very sensitive to building stiffer and deeper walls . The long-term behavior of the Reese wall is sensitive to construction season, the hardening properties of soil, and the relationship between effective stresses and effective degree of saturation .

Download or read book Standard Specifications for Highway Bridges written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 2002 with total page 1054 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis of Full scale Mechanically Stabilized Earth mse Wall Using Crimped Steel Wire Reinforcement written by Joshua Aaron Jensen and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanically Stabilized Earth (MSE) walls have provided an effective solution to constructing retaining walls. The engineering and construction industry is continually striving to provide more cost-effective and design-efficient means to building MSE walls. Hilfiker Retaining Walls has developed a new semi-extensible metal mat reinforcement technology which does not fit into the current extensible or inextensible categories as defined by regulating authorities. The objective of this project was to construct and observe the behavior collect quantitative data for a 20-foot tall MSE wall using the prototype semi-extensible reinforcement technology. The results were compared to expected American Association of State Highway and Transportation Officials Load Reduction Factored Design values and was also compared to another case study, Prediction of Reinforcement Loads in Reinforced Soil Walls as conducted by Tony M. Allen, P.E., and Richard J. Bathurst, Ph. D., P. Eng. Comparing the behavior of the 20-foot prototype MSE wall to these design regulations and case studies allowed for proper classification and will facilitate future industry design efforts.

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 Problem Solving in Foundation Engineering using foundationPro written by Mohammad Yamin and published by Springer. This book was released on 2015-09-08 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is at once a supplement to traditional foundation engineering textbooks and an independent problem-solving learning tool. The book is written primarily for university students majoring in civil or construction engineering taking foundation analysis and design courses to encourage them to solve design problems. Its main aim is to stimulate problem solving capability and foster self-directed learning. It also explains the use of the foundationPro software, available at no cost, and includes a set of foundation engineering applications. Taking a unique approach, Dr. Yamin summarizes the general step-by-step procedure to solve various foundation engineering problems, illustrates traditional applications of these steps with longhand solutions, and presents the foundation Pro solutions. The special structure of the book allows it to be used in undergraduate and graduate foundation design and analysis courses in civil and construction engineering. The book stands as valuable resource for students, faculty and practicing professional engineers. This book also: Maximizes reader understanding of the basic principles of foundation engineering: shallow foundations on homogeneous soils, single piles, single drilled shafts, and mechanically stabilized earth walls (MSE) Examines bearing capacity and settlement analyses of shallow foundations considering varying elastic moduli of soil and foundation rigidity, piles, and drilled shafts Examines internal and external stabilities of mechanically stabilized earth walls with varying horizontal spacing between reinforcing strips with depth Summarizes the step-by-step procedure needed to solve foundation engineering problems in an easy and systematic way including all necessary equations and charts

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 Development of the Simplified Method for Internal Stability Design of Mechanically Stabilized Earth Walls written by Tony M. Allen and published by . This book was released on 2001 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Prediction of soil reinforcement loads in mechanically stabilized earth MSE walls written by and published by . This book was released on 2001 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: