Sidewalk Undermining Studies: Phase I, Hydrology and Maintenance Studies

Report No: 75-R48

Published in 1975

About the report:

Studies of the maintenance and hydrology considerations involved in a sidewalk undermining problem in the Fairfax area are reported. Sidewalk undermining is attributed principally to a highly erodible soil found in much of the area and to the fact that current design standards and construction specifications are not adequate for sidewalk construction on such a soil. Recommendations of the study include: 1. The use of a sidewalk replacement technique wherein the subgrade soil is protected by polyethylene sheeting and infiltrated water is carried away by a subsurface drainage system. 2. A nomograph suggested for the determination of infiltration water and subdrainage requirements. 3. A suggestion to construct several test sections where sidewalk would be replaced on a densely graded base with a polyethylene or asphalt covering. 4. A suggestion to consider a slab removal and reuse technique.

Disclaimer Statement:The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.


Other Authors

Kenneth H. McGhee

Last updated: February 5, 2024

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