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Monday, October 19, 2020 | History

3 edition of Portable instrumentation for real-time measurement of scour at bridges found in the catalog.

Portable instrumentation for real-time measurement of scour at bridges

Portable instrumentation for real-time measurement of scour at bridges

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Published by U.S. Dept. of Transportation, Federal Highway Administration, Research, Development, and Technology, Turner-Fairbank Highway Research Center, Available through the National Technical Information Service in McLean, Va. (6300 Georgetown Pike, McLean 22101-2296), [Springfield, Va .
Written in English

    Subjects:
  • Scour at bridges -- Measurement -- Equipment and supplies.,
  • Scour at bridges -- Data processing.

  • Edition Notes

    Statement[David S. Mueller and Mark N. Landers].
    ContributionsLanders, Mark N., Turner-Fairbank Highway Research Center., Geological Survey (U.S.)
    The Physical Object
    FormatMicroform
    Paginationviii, 79 p.
    Number of Pages79
    ID Numbers
    Open LibraryOL16006926M

    Mueller, DS, Landers, MN. Portable instrumentation for real-time measurement of scour at bridges. Report for Federal Highway Administration. Report no. FHWA-RD, March McLean, VA: Federal Highway Administration. Google Scholar. 6 DC and AC Bridges Introduction • DC bridges • Wheatstone bridge • Kelvin bridge • Strain gauge bridge circuit • AC bridges • Maxwell bridge • Hay bridge • - Selection from Electronic Measurements and Instrumentation [Book].

      1. Introduction. Scour of foundations is the number one cause of bridge collapse in the United States (Melville and Coleman, , Briaud et al., , Briaud et al., ).During the last 30 years, bridges have failed due to scour problems (Shirole and Holt, , Briaud et al., ), causing major operating disruption and financial losses (De Falco and Mele, ). Bridge Scour Risk Management SCAN TEAM REPORT NCHRP Project 20 68A, Scan Figure B Use of sonar on a line rod to measure scour depths (left) and criteria to reduce Table B Portable scour monitoring devices being used for field inspection.. B Table B Cost of performing inspections using a portable device versus fixed.

    Evaluating Scour at Bridges (Fifth Edition). Hydraulic Engineering Circular No. Publication No. Fhwa-Hif Material for the day course comes primarily from Hydraulic Engineering Circular (HEC) “Bridge Scour and Stream Instability Countermeasures – Experience, Selection, and Design Guidance” (HEC). Given a stream instability and scour problem, participants will select appropriate countermeasures to correct the problem.


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Portable instrumentation for real-time measurement of scour at bridges Download PDF EPUB FB2

PORTABLE INSTRUMENTATION FOR REAL-TIME MEASUREMENT OF SCOUR AT BRIDGES 6. Performing Organization Code 7. Author (s) David S. Mueller and Mark N.

Landers 8. Performing Organization Report No. Performing Organization Name and Address Work Unit No. (TRAIS) U.S. Geological Survey Water Resources Division Bluegrass Parkway Louisville. Publications Portable Instrumentation for Real Time Measurement of Scour At Bridges.

FHWA Publication Number: RD; Publication Year: ; An electronic version of this manual is. Portable Instrumentation for Real-Time Measurement of Scour at Bridges. Published Date: Portable scour-measuring systems were developed to meet the requirements of three different applications: bridge inspections, limited-detail data collection, and detailed data collection.

a data-storage device. Commercially available Cited by: 8. Portable instrumentation for real-time measurement of scour at bridges / By David S. Mueller, Mark N. Landers, Geological Survey (U.S.) and United States. Federal Highway Administration. Office of Infrastructure Research and Development.

Abstract. A portable instrumentation system is being developed to obtain channel bathymetry during floods for detailed bridge-scour measurements. Portable scour measuring systems have four components: sounding instrument, horizontal positioning instrument, deployment mechanisms, and data storage device.

The sounding instrument will be a digital fathometer. Portable Instrumentation for Real Time Measurement of Scour At Bridges. RD PB No PDF. Effects of Gradation and Cohesion on Scour, Volume 6, "Abutment Scour in Uniform and Stratified Sand Mixtures" RD PB No PDF.

Remote Methods of Underwater Inspection of Bridge Structures. RD PB Bridge Scour in Nonuniform Sediment Mixtures and in Cohesive Materials: Synthesis Report: FHWA-RD RD: Portable Instrumentation for Real Time Measurement of Scour At Bridges: FHWA-RD RD: Remote Methods of Underwater Inspection of Bridge Structures: FHWA-RD HEC Design of Bridge Deck Drainage.

scour, local scour and lateral scour or erosion cause most of these failures. Resource Consultants, Inc., Fort Collins, Colorado, Research efforts have developed a large body of knowledge on bridge scour, mostly from laboratory model studies. However, field data and measurements of.

To be effective, bridge scour should be continuously monitored with the data made available in real time. The easiest and most efficient way to do this is with an integrated telemetry system.

A data logger can support multiple sonar and water level sensors and log scour data from each at pre-defined intervals. There are three major real-time scour monitoring methods in common use.

These instruments include sonar (acoustic transducer), magnetic sliding collars, and float-out devices. Any of these devices can be implemented in conjunction with a data logger and real-time telemetry system.

These instruments all measure elevation changes in the streambed. Mueller, D. S., and Landers, M. N., â Portable Instrumen- tation for Real-Time Measurement of Scour at Bridges,â Federal Highway Administration Publication No. FHWA-RD (FHWA approval pending), Turner-Fairbank Highway Research Center, McLean, VA.

This book explains the basic measurement techniques, instruments, and methods used in everyday practice. It covers in detail both analogue and digital instruments, measurements errors and uncertain-ty, instrument transformers, bridges, amplifiers, oscilloscopes, data acquisition, sensors, instrument controls and measurement systems.

to the surface of the water and can measure scour around pier using sounding device that attached at end of sounding pole. Physical probing and sonar are useful for real-time measuring scour during a flood and for routine measurements of bridge cross-sections.

Geophysical instruments are better used for scour determination after the flood and scour. Our proposed scour monitor system utilized low-cost commercial sensors, hall-effect sensors (unit price real-time measuring bridge pier scour with resolution of ca. Real-time monitoring can be accomplished using one of two basic types of equipment: fixed instrumentation installed on a bridge (such as falling rods, sliding collars, sonar, conductance probes etc.); or portable instrumentation used by field personnel to make measurements at any bridge.

INSTRUMENTATION FOR MEASURING SCOUR AT BRIDGE PIERS AND ABUTMENTS. This report documents and presents the results of research to develop, test, and evaluate instrumentation that would be both technically and economically feasible for use in measuring maximum scour depth at bridge piers and abutments.

Management strategies for developing a Plan of Action (POA) for scour critical bridges are outlined, and guidance is provided for scour monitoring using portable and fixed instrumentation. There are two companion documents, Evaluating Scour at Bridges (HEC) and Stream Stability at Highway Structures (HEC).

Get this from a library. Portable instrumentation for real-time measurement of scour at bridges. [David S Mueller; Mark N Landers; Turner-Fairbank Highway.

Portable scour monitoring devices are mainly: different types of probes such as: sticks, tape or rope with weights and bars used by divers and sonar acoustic measuring devices.

Stationary equipment is used for continuous or regular scour monitoring of the bridge supports of the bridge, for example once a day, once a week.

of analyzing the actual quantitative bridge scouring measurements in bridge scour research. By combining a bridge scouring data acquisition system and a communi-cation system, monitoring the bridge scouring data in real time brought a new dimension in bridge scour research.

Developmental Conditions for the Real-Time. To address this need, the U.S. Geological Survey, in cooperation with Colorado Department of Transportation, installed instrumentation at two bridges in western Colorado to measure streambed elevations in real-time during snowmelt-runoff periods (May through June) in and Streambed Scour at Bridges FHWA-RD RD Hydraulics of Iowa DOT Slope-Tapered Pipe Culverts FHWA-RD RD Performance Curve for a Prototype of Two Large Culverts in Series Dale Boulevard, Dale City, Virginia FHWA-RD RD Portable Instrumentation for Real Time Measurement of Scour At Bridges FHWA-RDBridge failure or loss of structural integrity can result from scour of riverbed sediment near bridge abutments or piers during high-flow events in rivers.

In the past 20 years, several methods of monitoring bridge scour have been developed spanning a range of measurement approaches, complexities, costs, robustness, and measurement resolutions.