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Title: TESTING AND MODELING OF TWO ROCKFALL BARRIERS
Accession Number: 00715538
Record Type: Component
Availability: Find a library where document is available Abstract: Testing, evaluation, and analysis of two types of rockfall barriers are reported. Rockfall barriers are designed to withstand impacts by falling boulders and are used to protect roadways and structures. Among several types of barriers in use by transportation departments, two designs--a flexible cable-fence barrier and a freestanding mechanically stabilized earth (MSE) barrier--have been developed by the Colorado Department of Transportation in a program of prototype testing and dynamic analysis. In tests, full-size prototype barriers were subjected to impacts by boulders falling freely down a natural slope. The velocity and kinetic energy of the rockfall and the performance of the barrier are basic findings of tests. Simulation of test impacts in dynamic analysis provides information about the load demand on components of barriers. Test data are used to calibrate analytical procedures. Three prototype cable fences have been tested. The fences have proven rockfall capacities up to 129 kJ (95,000 ft-lb) and can halt boulders as heavy as 2,950 kg (6,500 lb). Three prototype MSE barriers have been tested. One prototype was repaired after initial testing and then retested to examine the performance of repairs. MSE barriers offer rockfall capacities in excess of 1,360 kJ (1,000,000 ft-lb) and have been observed to halt boulders as heavy as 13,700 kg (30,100 lb).
Supplemental Notes: This paper appears in Transportation Research Record No. 1504, Modeling and Model Verification; Testing Pavement Layers and Materials; and Low-Cost Drainage Structures. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Title: Monograph Accession #: 01399829
Language: English
Authors: Hearn, GeorgeBarrett, Robert KHenson, H HenniePagination: p. 1-11
Publication Date: 1995
Serial: ISBN: 0309061725
Features: Figures
(8)
; References
(19)
; Tables
(5)
TRT Terms: Uncontrolled Terms: Subject Areas: Design; Geotechnology; Highways; Safety and Human Factors; I85: Safety Devices used in Transport Infrastructure
Files: TRIS, TRB
Created Date: Jan 2 1996 12:00AM
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