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Author : Larry D. Olson
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.:/5 (365 download)
Download or read book Nondestructive Testing of Unknown Subsurface Bridge Foundations written by Larry D. Olson and published by . This book was released on 1996 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Cooperative Highway Research Program
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.:/5 (475 download)
Download or read book Nondestructive Testing of Unknown Subsurface Bridge Foundations written by National Cooperative Highway Research Program and published by . This book was released on 1996 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Olson Engineering Inc
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (55 download)
Download or read book Guideline for Nondestructive Evaluation of Unknown Subsurface Bridge Foundation Depths written by Olson Engineering Inc and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : U. S. Department Of Transportation
Publisher :
ISBN 13 : 9781466250550
Total Pages : 76 pages
Book Rating : 4.2/5 (55 download)
Download or read book Geotechnical Engineering Notebook written by U. S. Department Of Transportation and published by . This book was released on 2008-08-27 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Purpose: To provide interim information on available NDT methods for assessing unknown bridge foundations.Background: The NCHRP Project 21-5 involves a study of various types of NDT equipment which could be used in subsurface investigation of unknown bridge foundations. At this stage of the research, the general aspects of several types of NDT equipment have been assessed for applicability in the unknown bridge foundation area. Although no definite conclusions can yet be reached on the reliability of these NDT methods in all situations, enough data has been collected to provide interim information to highway agencies on the general aspects of these methods.
Author : Stacey Elizabeth Tucker
Publisher :
ISBN 13 :
Total Pages : 242 pages
Book Rating : 4.:/5 (874 download)
Download or read book Non-Destructive Testing of Subsurface Infrastructure Using Induced Polarization and Electrical Resistivity Imaging written by Stacey Elizabeth Tucker and published by . This book was released on 2013 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: As of September 2007, there were over 67,000 U.S. bridges in the National Bridge Inventory classified as having unknown foundations. The bridges spanning rivers are of critical importance due to the risks of potential scour. In fact, over half of all bridge collapses are due to scour. Not only are these failures costly, they can be deadly for the traveling public. On April 5, 1987, ten people were killed in New York when a pier collapsed on the Schoharie Creek Bridge causing two spans of the deck to fall into the creek. Several other fatal collapses have occurred since the Schoharie Creek Bridge failure. Detecting scour is only part of the assessment that must take place to determine risk of failure and knowing the foundation depth is a critical component of the assessment. While this issue is not new, current techniques are typically invasive or costly. This research explores the feasibility and effectiveness of induced polarization (IP) and electrical resistivity imaging (ERI), near surface geophysical methods, for determining the depth of unknown foundations. In this work, forward models are created to ascertain the effects of the bridge layout on data quality such as varying depths and the impact of adjacent foundations on the foundation in question. Next, an experimental study is conducted at a National Geotechnical Experimentation Site (NGES) to further identify key parameters for the testing design and setup in order to obtain optimal surveys of bridge foundations. The conclusions of the forward modeling and NGES investigations are used to plan the field surveys on four bridges with known foundations. The outcomes of the four bridges show that IP and ERI can be used in concert with one another to estimate the type and depth of bridge foundations. The results of the field surveys are used to create a probability of non-exceedance curve for future predictions of unknown bridge foundations using the methods described in this research. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/151176
Author : Paul E. Hartbower
Publisher : CRC Press
ISBN 13 : 1000125211
Total Pages : 417 pages
Book Rating : 4.0/5 (1 download)
Download or read book Structural Materials Technology written by Paul E. Hartbower and published by CRC Press. This book was released on 2020-08-23 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of papers presented in the NDT Conference held on February 20-23, 1996 at San Diego, California. The conference provided an opportunity to share experience and provide additional input to the Federal Highway Administration.
Author : Ronald W. Florkowski
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (18 download)
Download or read book Evaluation of Unknown Foundations written by Ronald W. Florkowski and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: In recent years, bridge foundations have been in the spotlight throughout the nation. Bridges built over running water are susceptible to erosion or scour around their foundations. The reduction in load capacity to piers and abutments pose a safety risk to highway motorists. It has become necessary for engineers to examine and monitor these "scour critical" bridges. The difficulty arises with subsurface foundations of which very little is known about their construction. Hence, the methods applied to analyzing "Unknown Foundations" have become a necessary topic of research. This thesis explores a method to determine foundation lengths. Similar to Sonic Echo / Impulse Response, this procedure measures reflected shock waves sent through concrete pilings. The technique is non-destructive in nature and is performed near the surface of the foundation. The test is performed on the side of the exposed piling. Current methods are limited by the fact that the tops of most pilings are inaccessible due to pilecaps or beams. Often times, pilings are embedded in stiff soils, which have a dampening effect on the stress waves. This thesis employs a method of analysis that will overcome such limitations and provide engineers with another tool to determine subsurface foundation lengths.
Author : Larry D. Olson
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (346 download)
Download or read book Determination of Unknown Subsurface Bridge Foundations written by Larry D. Olson and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 348 pages
Book Rating : 4.3/5 (91 download)
Download or read book Nondestructive Evaluation of Bridges and Highways written by and published by . This book was released on 1996 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Behnoud Kermani
Publisher :
ISBN 13 :
Total Pages : 235 pages
Book Rating : 4.:/5 (128 download)
Download or read book Application of P-wave Reflection Imaging to Unknown Bridge Foundations and Comparison with Other Non-Destructive Test Methods written by Behnoud Kermani and published by . This book was released on 2013 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proper design of bridge structures requires an appreciation for the possible failure mechanisms that can develop over the lifetime of the bridge, many of which are related to natural hazards. For example, scour is one of the most common causes of bridge failures. Scour occurs due to the erosion of soil and sediment within a channel with flowing water. During a flood event, the extent of scour can be so great that it can destabilize an existing bridge structure. In order to evaluate the scour potential of a bridge, it is necessary to have information regarding the substructure, particularly the bridge foundations. However, as of 2011 there are more than 40,000 bridges across United States with unknown foundations. Generally for these bridges there are no design or as-built plans available to show the type, depth, geometry, or materials incorporated into the foundations. Several non-destructive testing (NDT) methods have been developed to evaluate these unknown foundations. The primary objective of this research is to identify the most current and widely used NDT methods for determining the embedment depth of unknown bridge foundations and to compare these methods to an ultrasonic P-wave reflection imaging system. The ultrasonic P-wave reflection system has tremendous potential to provide more information and address several short-comings of other NDT methods. A laboratory study was initiated to explore various aspects related to the P-wave system performance, in order to characterize the limitations of the system in evaluation of unknown foundations prior to deployment in field studies. Moreover, field testing was performed using the P-wave system and a number of the current NDT methods at two selected bridge foundations to allow comparison between the results.
Author : Sreenivas Alampalli
Publisher : CRC Press
ISBN 13 : 9781566769495
Total Pages : 458 pages
Book Rating : 4.7/5 (694 download)
Download or read book Structural Materials Technology written by Sreenivas Alampalli and published by CRC Press. This book was released on 2000-02-29 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fourth Structural Materials Technology NDT Conference was held in Atlantic City, New Jersey, with over sixty speakers presenting on a wide variety of topics. The goal of this conference was to inform engineers and researchers of the new nondestructive testing/nondestructive evaluation (NDT/NDE) technologies and techniques available for use in transportation construction. The use of alternative materials is challenging NDT/NDE professionals to develop new methods or modify existing techniques to address quality control, quality assurance, and long-term monitoring of structures built or strengthened with these materials. One such alternative is fiber-reinforced polymer (FRP) products. This conference included papers on this topic and a panel discussion that focused on the future of NDT/NDE technologies for structures built or rehabilitated with FRP composites. These proceedings contain the 62 papers that were presented at the conference, arranged according to session number. An author index is included.
Author : Larry D. Olson
Publisher :
ISBN 13 :
Total Pages : 71 pages
Book Rating : 4.:/5 (128 download)
Download or read book Determination of Unknown Subsurface Bridge Foundations written by Larry D. Olson and published by . This book was released on 1998 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bernard Hertlein
Publisher : John Wiley & Sons
ISBN 13 : 0470034823
Total Pages : 290 pages
Book Rating : 4.4/5 (7 download)
Download or read book Nondestructive Testing of Deep Foundations written by Bernard Hertlein and published by John Wiley & Sons. This book was released on 2007-01-11 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nondestructive Testing involves the use of methods such as wave propagation, electromagnetism, electrical conductivity, and thermal conductivity to test structural integrity and thereby allow nondestructive assessment of structures and the possibility of structural failures before they occur. Nondestructive Testing of Deep Foundations covers different techniques designed to provide information about the integrity and quality of the material that makes up a deep foundation. Nondestructive Testing methods are used at all stages of a structure's life - from new construction quality control to residual lifetime prediction, and even during the monitoring of demolition. In addition, Nondestructive Testing is being increasingly specified in deep foundation projects, though often without a good understanding of its limitations and with the result that methods are often misused. In order to be able to specify an appropriate method, or to recognize an inappropriate specification, it is necessary for the engineer, specifier and/or contractor to understand the capabilities and limitations of each of the methods currently in use. Nondestructive Testing of Deep Foundations: Describes the most commonly used deep foundation construction techniques, including typical use of material Provides a brief history of the development of commercially available nondestructive methods Summarises each method's capabilities and limitations Acts as a one stop reference drawing together resources only previously available in conference proceedings and journal papers This manual will prove to be a welcome addition to the bookshelf of all practitioners in civil/structural and geotechnical engineering and architecture. It will also provide a valuable insight into this highly technical field for university researchers, lecturers and postgraduate students in civil/structural and geotechnical engineering.
Author : Everett V. Richardson
Publisher : ASCE Publications
ISBN 13 : 9780784474655
Total Pages : 1076 pages
Book Rating : 4.4/5 (746 download)
Download or read book Stream Stability and Scour at Highway Bridges written by Everett V. Richardson and published by ASCE Publications. This book was released on 1999-01-01 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sponsored by the Water Resources Engineering (Hydraulics) Divsion of ASCE. This collection contains 75 papers and 321 abstracts presented at conferences sponsored by the Water Resources Engineering (Hydraulics) Division of ASCE from 1991 through 1998. The collection contains many new and expanded versions of the original papers and is designed to assist the practitioner with the concepts in evaluating stream instability and scour at bridges. Topics include: history of bridge scour research; bridge scour determination; stream stability and geomorphology; construction scour; instrumentation for measuring and monitoring; field measurement; computer and physical modeling of bridge scour; scour at culverts; and economic and risk analysis. One important paper contains 384 field measurements of local scour at piers made by the U.S. Geological Survey.
Author : Mohammad Sadik Khan
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (759 download)
Download or read book Evaluation of Resistivity Imaging (RI) Method for Determining Unknown Deep Foundation Depth written by Mohammad Sadik Khan and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: There are approximately 580,000 highway bridges in the National Bridge inventory and 104,000 of these bridges are estimated to have unknown foundations type and/or depth. Determining unknown foundation length and type of bridge foundation is becoming an important issue for State DOTs to ensure the safety of the bridge. There are several methods available to determine unknown foundation depth based on specific site conditions and type of foundation to be tested. Resistivity Imaging (RI) is a non destructive method to investigate the subsurface condition. The objective of current study was to determine unknown bridge foundation depth of three bridges at North Texas using RI method. Two of the investigated bridges were supported by driven steel H-pile and the other bridge had drill shaft as foundation. Based on RI results, unknown foundation depth were determined from the variation of resistivity below the foundation. Parallel Seismic (PS) and Sonic Echo (SE) method were also utilized for one bridge site supported by steel H pile to verify the depth determined by RI method. PS method was performed in two casing backfilled with sand and cement grout. The investigated unknown bridge foundation depths using RI method were compared with the actual foundation depth. The determined unknown foundation depths from RI method were found very close to actual foundation depth for two steel H-pile sites. However, no significant variation of resistivity was observed below the foundation of third bridge supported by drill shaft and the determined foundation depth for third bridge site did not match the actual foundation depth. PS method also predicted the depth of the foundation very close to actual foundation depth. However, the SE test was determined to be not suitable for determining the unknown steel H-pile foundation depth.
Author : National Cooperative Highway Research Program
Publisher :
ISBN 13 :
Total Pages : 240 pages
Book Rating : 4.3/5 (555 download)
Download or read book Progress Report written by National Cooperative Highway Research Program and published by . This book was released on 2002 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Cesar Sciammarella
Publisher : Springer
ISBN 13 : 3319224492
Total Pages : 199 pages
Book Rating : 4.3/5 (192 download)
Download or read book Experimental and Applied Mechanics, Volume 4 written by Cesar Sciammarella and published by Springer. This book was released on 2015-10-30 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental and Applied Mechanics, Volume 4 of the Proceedings of the 2015SEM Annual Conference& Exposition on Experimental and Applied Mechanics, the fourth volume of nine from the Conference, brings together contributions to important areas of research and engineering. The collection presents early findings and case studies on a wide range of topics, including: Advanced Methods for Frontier Applications, Non-Homogeneous Parameters Identification, Teaching Experimental Mechanics in the 21st Century, Material Characterization and Testing, Mechanics of Interfaces Novel Applications of Experimental Mechanics
