Download or read book Design of Short Drilled Shaft Foundations in High plasticity Clay Under Inclined Loading written by Thornchaya Wejrungsikul and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Drilled shaft foundations are primarily used to support structures such as bridge piers, towers, buildings, transmission towers, and roadway median cable barriers. Generally, the main characteristics of drilled shafts are to transfer the loads to the stronger subsoil layers in the vertical direction and also their ability to withstand lateral movements from lateral loads applied. Though the design of shafts is well established with respect to combinations of loads and moments, their behavior under pullout type inclined loading is not well established. The inclined load applied is the combination of lateral and uplift loads applied at the same time and structures such as ends of cable barriers and transmission towers that are supported by the drilled shafts. This dissertation research mainly focuses on the use of drilled shafts supporting at the ends of the cable median barrier systems. These shafts play an important role in protecting the integrity of the cables thereby reducing cross-over collisions at highway medians. Several foundation problems were recorded in north Texas when drilled shafts were used to connect all the cables of the cable barrier systems. During December 2006 to February 2007, several foundation failures of three cable median barrier were observed in Kaufman County near Dallas without any traffic related vehicular impacts (Heady, 2008). Preliminary investigation of foundation failures showed that failed drilled shafts were located in a high plasticity clay environment. Causes of failures are attributed to cold temperature induced shrinkage in the cables that might have significantly increased the tensions in them. Other factors consist of soil saturation from prolonged rainfall events and also potential use of smaller size drilled shafts at the site. In order to fully understand the causes of failures, the present dissertation research was performed. As a part of this research, various sizes of drilled shafts were designed and constructed in a clayey soil environment similar to the one where foundation distress was observed. Geotechnical sampling and laboratory testing were performed and the test results showed different soil layers including high plasticity clayey soil near the ground surface. Soil strength properties for both unsaturated (field condition) and saturated conditions were determined and these results are used in the analysis of field test results to deduce the causes of foundation distress. A new load test setup for the application of an inclined tensile loading on the drilled shaft was designed to simulate the natural field loading condition exerted by the cables. The capacities of different sizes of drilled shafts from field test were tested and measured with this setup and these results showed that the dimensions of reaction test piers and spacings used between reaction and test piers have yielded results that are not influenced by the boundary effects or reaction shaft movements. All load tests were conducted until the foundations reached failure. Test results were analyzed with both uplift capacity and lateral capacity analyses models proposed by many researchers as well as Finite Element Method (FEM) based numerical modeling in understanding the behaviors of drilled shafts under the inclined loading. After obtaining good simulation results, the analytical models are further used for various hypothetical foundation dimensions and for different undrained shear strengths of soils. These test results are used to develop foundation design charts for inclined loading conditions. Both the selection of a specific design chart and its use are explained. Additionally, drilled shaft construction guidelines for cable barrier systems and recommendation for periodic maintenance are provided.

Download or read book Design of Inclined Loaded Drilled Shafts in High plasticity Clay Environment written by Anand J. Puppala and published by . This book was released on 2011 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Drilled Shaft Design and Construction Guidelines Manual 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:

Download or read book An Experimental Study of the Undrained Behavior of Drilled Shaft Foundations Subjected to Static and Cyclic Inclined Loading written by Fred H. Kulhawy and published by . This book was released on 1995 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Drilled Shafts written by National Highway Institute (U.S.) and published by . This book was released on 1988 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document was written as a resource for participants in a short course covering the topic of construction and design of drilled shaft foundations for bridges and other structures. It is the second edition of a Federal Highway Administration workbook on construction and design of drilled shafts. The first edition was written in 1988 (FHWA-SA-HI-88-042). While introductory material from the 1988 edition was retained, the emphasis in this document is on providing relatively comprehensive information for engineers who already have some experience with drilled shaft construction and/or design. The initial chapters cover an overview of the characteristics of drilled shafts, site investigations for drilled shafts (to collect information for both construction and design), and details of drilled shaft construction. These chapters are followed by several chapters on the design of drilled shafts in soil and rock for both axial and lateral loading, with examples. Both allowable stress design and load and resistance factor design principles are addressed. Details of design calculations procedures are provided in the appendices.

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 Drilled Shaft Design and Construction Guidelines 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:

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 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Study of Drained Behavior of Drilled Shafts During Static Inclined Loading written by Stevan D. Vidić and published by . This book was released on 1992 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Overview for Design and Construction of Drilled Shafts in Cohesive Soils written by Lawrence D. Johnson and published by . This book was released on 1981 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Drilled Shaft Foundations for Noise Barrier Walls and Slope Stabilization written by Robert Y. Liang and published by . This book was released on 2002 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this research are to develop a methodology that would allow the use of the SPT (Standard Penetration Test) results for analysis and design of the laterally loaded drilled shafts and to develop a methodology for designing the drilled shafts to stabilize the unstable slopes and embankments.

Download or read book An Experimental Study of the Drained Behavior of Drilled Shaft Foundations Subjected to Cyclic Inclined Loading written by Stevan D. Vidić and published by . This book was released on 1993 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Experimental Study of the Undrained Uplift Behavior of Model Drilled Shaft Foundations written by John Frederick Beech and published by . This book was released on 1986 with total page 1046 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Deep Foundations written by Yoshiaki Kikuchi and published by Taylor & Francis. This book was released on 2007-06-21 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Civil Engineering has recently seen enormous progress in the core field of the construction of deep foundations. This book is the result of the International Workshop on Recent Advances in Deep Foundations (IWDPF07), which was held in Yokosuka, Japan from the 1st to the 2nd of February, 2007. Topics under discussion in this book include recent rese

Download or read book An Experimental Study of the Behavior of Drilled Shaft Foundations in Clay Under Static and Repeated Lateral and Moment Loading written by Paul Wesley Mayne and published by . This book was released on 1991 with total page 986 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Foundations in Problem Soils written by Steven J. Greenfield and published by . This book was released on 1992 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the different foundation systems in use, and how a system is selected to meet particular objectives, on a regional and a site-specific basis. The importance of long term costs and benefits of each is discussed, and common construction and design oversights are presented.