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Author : Peter Sajer
Publisher :
ISBN 13 :
Total Pages : 376 pages
Book Rating : 4.:/5 (243 download)
Download or read book Evaluation of Bridge Approach Slab Effectiveness written by Peter Sajer and published by . This book was released on 1990 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sam Helwany
Publisher :
ISBN 13 :
Total Pages : 306 pages
Book Rating : 4.3/5 (555 download)
Download or read book Evaluation of Bridge Approach Settlement Mitigation Methods written by Sam Helwany and published by . This book was released on 2007 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.3/5 (555 download)
Download or read book Performance Evaluation of Bridge Approaches written by and published by . This book was released on 1983 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 202 pages
Book Rating : 4.:/5 (254 download)
Download or read book Bridge approach slab effectiveness written by and published by . This book was released on 1991 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stanley Y. T. Chen
Publisher :
ISBN 13 :
Total Pages : 114 pages
Book Rating : 4.3/5 (121 download)
Download or read book Evaluation of Structural Performance of Bridge Approach Slabs written by Stanley Y. T. Chen and published by . This book was released on 2010 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Anand J. Puppala
Publisher :
ISBN 13 :
Total Pages : 363 pages
Book Rating : 4.:/5 (797 download)
Download or read book Recommendations for Design, Construction, and Maintenance of Bridge Approach Slabs written by Anand J. Puppala and published by . This book was released on 2012 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: Settlement and heave related movements of bridge approach slabs relative to bridge decks create a bump in the roadway. Several problems arise from these bumps, which include poor riding conditions, potential vehicle damage, loss of vehicle control causing injuries or even casualities [i.e., casualties], lowered perception of the department's road works, increased maintenance works, and constant delays to rehabilitate the distressed lanes. All these make this bump problem a major maintenance problem in Texas. Several mitigation methods have been employed, and the results are not always satisfactory. In the present research, two treatment methods are investigated for controlling settlements of approach slabs of new bridge construction. Researchers from UTA and UTEP performed two phases to accomplish these studies. During the first phase, the documented information that covers various methods used so far for approach slab settlement mitigation technologies is compiled and presented. The second and final phase focused on field evaluation studies of deep soil mixing and light weight embankment fill treatment methods in reducing settlements. A few other technologies were also evaluated for reducing settlements of existing bridge approach slabs. Both design and construction specifications of the new methods that provided effective treatments in field conditions are presented.
Author : Jean-Louis Briaud
Publisher : Transportation Research Board
ISBN 13 : 9780309060073
Total Pages : 88 pages
Book Rating : 4.0/5 (6 download)
Download or read book Settlement of Bridge Approaches written by Jean-Louis Briaud and published by Transportation Research Board. This book was released on 1997 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ronaldo Luna
Publisher :
ISBN 13 :
Total Pages : 212 pages
Book Rating : 4.:/5 (554 download)
Download or read book Evaluation of Bridge Approach Slabs, Performance and Design written by Ronaldo Luna and published by . This book was released on 2003 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design changes in the 1990s to bridge approaches resulted in approach slabs of about 8m in length supported at one end on the bridge abutment and at the other by a sleeper beam resting on the embankment. These slabs have not performed adequately due primarily to excessive deformation of the foundation and fill soils under the slab and sleeper beam. Survey questionnaires were administered for resident engineers in MoDOT and neighboring states to assess overall performance. Two bridge sites were selected for more detailed study of the deformation mechanisms. Analyses involving modeling using a finite element method program were conducted using soil properties obtained from drilling, sampling and laboratory testing at the study sites. Conclusions and recommendations are in the following categories: initiating programmatic instrumentation and monitoring plans for approach embankments; enhanced drilling, sampling and analysis at locations of future embankments; geosynthetic reinforcement of the embankment; staged construction; separating grading and paving contract; abutment and drainage details; and improved compaction specifications.
Author : Ganesh Thiagarajan
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.:/5 (864 download)
Download or read book Bridge Approach Slabs for Missouri DOT written by Ganesh Thiagarajan and published by . This book was released on 2013 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a recent study on cost efficient alternative bridge approach slab (BAS) designs (Thiagarajan et al. 2010) has recommended three new BAS designs for possible implementation by MoDOT namely a) 20 feet cast-inplace slab with sleeper slab (CIP20SLP) - for new construction on major roads, b) 25 and 20 feet precast-prestressed slab with sleeper slab (PCPS20SLP)- for replacement and new construction applications on major and minor roads, and c) 25 feet modified BAS without a sleeper slab for new CIP construction on minor roads (CIP25NOSLP). The objective of the project here is to evaluate and compare the field performance of recommended BAS designs, their constructability, and their impact on cost and schedule to the current MoDOT BAS design. Two PCPS20SLP, one CIP20SLP and two CIP25NOSLP implementations have been implemented and studied for this report. One PCPS20SLP panel was also tested in the laboratory for several washout conditions and for its ultimate capacity. Based on field observations, data recorded and analyzed, preconstruction and post construction cost analyses this study has found that all the suggested designs are performing well and are lower in cost compared to current designs used in practice.
Author : Seyed Yashar Yasrobi
Publisher :
ISBN 13 : 9781321517118
Total Pages : 218 pages
Book Rating : 4.5/5 (171 download)
Download or read book Investigation of Approach Slab and Its Settlement for Roads and Bridges written by Seyed Yashar Yasrobi and published by . This book was released on 2014 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Approach slabs serve as a transitional system between an approach road and a bridge. Settlement of bridge approach slabs and their supporting backfill has been experienced by more than ten Departments of Transportation throughout the United States. According to current Wyoming Department of Transportation inspection reports, bridge approach slab settlements occurred not only on existing bridges but also on newly built bridges that were just opened to traffic. These settlements typically create voids ranging from 6-in to 12-in between the base of the approach slab and the geotextile reinforced backfill. This research presents factors causing bridge approach slab settlements and provides necessary design and construction recommendations. A comprehensive literature review pertaining to approach slabs was performed to examine outcomes of research conducted by 12 states. The current specifications and standards on bridge approach slabs of the corresponding states' Departments of Transportation were also evaluated. A nationwide survey was conducted to fill in the missing knowledge identified in the literature review. The results of the survey are categorized in three groups based on the percentage of bridges experiencing approach slab settlements in that state. Results of the survey show that 46% of the total 28 respondents are not satisfied with their current approach slab designs. The survey results revealed that the most common cause of approach slab settlement is poor construction practices. The most important finding of the survey is that performing in-situ tests to control backfill compaction reduces the amount of approach slab settlement. Using the lessons learned from the literature and the results of the survey, potential amendments to current Wyoming Department of Transportation design and construction manuals are recommended.
Author : Edward J. Hoppe
Publisher :
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.:/5 (1 download)
Download or read book Guidelines for the Use, Design, and Construction of Bridge Approach Slabs written by Edward J. Hoppe and published by . This book was released on 1999 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Differential settlement at the roadway/bridge interface typically results in an abrupt grade change, causing driver discomfort, impairing driver safety, and exerting potentially excessive impact traffic loading on the abutment. Bridge approach slabs are used to keep the effects of this differential settlement within tolerable limits. In many cases, however, the final magnitude of settlement exceeds the working range of an approach slab, necessitating costly roadway and slab repairs. Many state DOTs regard the settlement of bridge approach slabs as a substantial maintenance problem. Guidelines affecting the use, design methodology, material specifications, and construction techniques vary greatly from state to state. The purpose of this study was to provide a literature review on the subject and to conduct a survey on the state of the practice. Thirty-nine state DOTs responded to the survey. Summary findings were compiled, and a comparison with current VDOT practices was made. Recommendations for a new set of guidelines, aimed at mitigating bridge approach settlement, were formulated.
Author : Chunsheng Cai
Publisher :
ISBN 13 :
Total Pages : 158 pages
Book Rating : 4.3/5 (555 download)
Download or read book Determination of Interaction Between Bridge Concrete Approach Slab and Embankment Settlement written by Chunsheng Cai and published by . This book was released on 2005 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this research is to correlate the deformation and internal force of the approach slab with the approach embankment settlements and the approach slab parameters such as length and thickness. Finite element analysis was carried out in the present study. This correlation will be used to evaluate the effectiveness of approach slabs and develop guidelines for their structural design. This information will also help determine when settlement controls are necessary. While flat approach slabs may be used for some short span applications, longer span lengths would require very thick slabs. In such cases, ribbed approach slabs (similar to slab-on-beam bridge decks) are proposed in the present study because they provide advantages over the flat slabs. Based on finite element analysis, internal forces and deformations of ribbed slabs were predicted and their designs were conducted. In addition, special studies on a few issues that were not included in the original scope of work were conducted. These special studies including investigating (1) the skew angle effects and the applicability of the developed methodology for right approach slabs to skewed approach slabs; (2) the failure mode/mechanism of the approach slab end and the abutment connection; (3) the applicability of the developed methodology to AASHTO LRFD highway loads; and (4) rating of the developed approach slabs in terms of special trucks.
Author :
Publisher :
ISBN 13 :
Total Pages : 170 pages
Book Rating : 4.:/5 (1 download)
Download or read book Instrumentation and Monitoring of Integral Bridge Abutment-to-approach Slab Connection written by and published by . This book was released on 2008 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Iowa Department of Transportation has long recognized that approach slab pavements of integral abutment bridges are prone to settlement and cracking, which manifests as the "bump at the end of the bridge". A commonly recommended solution is to integrally attach the approach slab to the bridge abutment. Two different approach slabs, one being precast concrete and the other being cast-in-place concrete, were integrally connected to side-by-side bridges and investigated. The primary objective of this investigation was to evaluate the approach slab performance and the impacts the approach slabs have on the bridge. To satisfy the research needs, the project scope involved a literature review, survey of Midwest Department of Transportation current practices, implementing a health monitoring system on the bridge and approach slab, interpreting the data obtained during the evaluation, and conducting periodic visual inspections. Based on the information obtained from the testing the following general conclusions were made: The integral connection between the approach slabs and the bridges appear to function well with no observed distress at this location and no relative longitudinal movement measured between the two components; Tying the approach slab to the bridge appears to impact the bridge; The two different approach slabs, the longer precast slab and the shorter cast-in-place slab, appear to impact the bridge differently; The measured strains in the approach slabs indicate a force exists at the expansion joint and should be taken into consideration when designing both the approach slab and the bridge; The observed responses generally followed an annual cyclic and/or short term cyclic pattern over time.
Author : Pinit Ruttanaporamakul
Publisher :
ISBN 13 :
Total Pages : 275 pages
Book Rating : 4.:/5 (933 download)
Download or read book Evaluation of Lightweight Geofoam for Mitigating Bridge Approach Slab Settlements written by Pinit Ruttanaporamakul and published by . This book was released on 2015 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: The bump at the end of a bridge infrastructure is one of the frequent problems found in Texas and other states. Transportation agencies spend millions of dollars annually to repair the bump problem. The major cause of the problem is the settlement of backfill materials and foundation soils, as well as the erosion of backfill. Research was undertaken at the University of Texas at Arlington to study the embankment located on US 67 over SH 174 in Johnson County, Cleburne, Texas. The embankment was reconstructed, replacing the top of existing fill soil with lightweight EPS 22 geofoam blocks to reduce the loads imposed on the underlying subgrade and, consequently, to reduce the magnitude of settlement due to the consolidation phenomenon. The main objective of this research is to assess the effectiveness of using light backfill, in the form of EPS geofoam, to mitigate embankment settlements. Laboratory studies were conducted to study the basic properties, compressibility characteristics, and shear strength of the soils and EPS 22 geofoam. Field monitoring studies were also conducted at regular time intervals to study the performance of EPS geofoam under live traffic. Modeling studies were conducted in this research, using the PLAXIS program to predict the long term performance of the test section. The above mentioned studies are being currently pursued to achieve the final objective which is to develop the design and construction guidelines for the future use on other geofoam-related construction.
Author : Harvey E. Wahls
Publisher : Transportation Research Board
ISBN 13 : 9780309049054
Total Pages : 56 pages
Book Rating : 4.0/5 (49 download)
Download or read book Design and Construction of Bridge Approaches written by Harvey E. Wahls and published by Transportation Research Board. This book was released on 1990 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes case histories of the Dumbarton Bridge (San Francisco Bay, Calif.), the Rainier Avenue Embankment (Seattle, Wash.) and the Gallows Road Grade Separation (Fairfax, Va.)
Author : Arizona Transportation Research Center
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (384 download)
Download or read book Bridge Approach/anchor Slab Joint Evaluation written by Arizona Transportation Research Center and published by . This book was released on 1997 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Wu Yang
Publisher :
ISBN 13 :
Total Pages : 284 pages
Book Rating : 4.:/5 (48 download)
Download or read book Evaluating the Performance of Bridge Approach Slabs in South Carolina written by Wu Yang and published by . This book was released on 2001 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
