A major use of Mechanically Stabilized Earth (MSE) walls is as bridge approach embankments, where they are typically constructed with a roadside barrier system supported on the edge of the walls.
The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 326: Design Guidelines for Test Level 3 through Test Level 5 Roadside Barrier Systems Placed on Mechanically Stabilized Earth Retaining Walls is dedicated to developing guidelines for barrier-moment slab systems placed over MSE walls to resist vehicular impact loads resulting from three test levels.
Supplementary to the document is a Presentation.
National Academies of Sciences, Engineering, and Medicine. 2022. Design Guidelines for Test Level 3 through Test Level 5 Roadside Barrier Systems Placed on Mechanically Stabilized Earth Retaining Walls. Washington, DC: The National Academies Press. https://doi.org/10.17226/26580.
|2 STATE OF PRACTICE FOR BARRIERS AND MSE WALLS||11-38|
|3 PEAK DYNAMIC LOAD||39-71|
|4 MOMENT SLAB WIDTH||72-99|
|5 REINFORCEMENT LOADS||100-139|
|6 TL-4 FULL-SCALE TEST ON TOP OF A 10-FT HIGH MSE WALL||140-158|
|7 TL-5 FULL-SCALE TEST ON TOP OF A 10-FT HIGH MSE WALL||159-225|
|8 STATIC LOAD TEST ON TL-5 BARRIER-MOMENT SLAB SYSTEM||226-240|
|9 DESIGN GUIDELINES FOR BARRIER-MOMENT SLAB SYSTEMS MOUNTED ON MSE WALLS FOR TL-3 THROUGH TL-5 IMPACTS||241-293|
|10 AASHTO LRFD FORMAT DESIGN GUIDELINES||294-305|
|APPENDIX A DESIGN OF MSE WALL FOR TL-4 IMPACT||311-315|
|APPENDIX B DETAILED DRAWINGS OF THE TL-4 TEST WALL INSTALLATION||316-323|
|APPENDIX C SEQUENTIAL PHOTOGRAPHS FOR TL-4 TEST||324-325|
|APPENDIX D DESIGN OF TL-5 MSE WALL TEST INSTALLATION USING RECOMMENDED DESIGN PARAMETERS||326-333|
|APPENDIX E DETAILED DRAWINGS OF THE TL-5 WALL TEST INSTALLATION||334-344|
|APPENDIX F CONSTRUCTION SEQUENCE OF THE TL-5 MSE WALL TEST INSTALLATION||345-353|
|APPENDIX G TL-5 SEQUENTIAL PHOTOGRAPHS||354-356|
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