Chapter
Jun 6, 2018
Soil-Bentonite Slurry Trench Cutoff Wall Longevity
Authors: Daniel Ruffing, M.ASCE [email protected], Jeffrey Evans, Ph.D., F.ASCE [email protected], and Nathan Coughenour, M.ASCE [email protected]Author Affiliations
Publication: IFCEE 2018
Abstract
Soil-bentonite (SB) slurry trench cutoff walls are widely used for subsurface containment of contaminants and groundwater control. In many cases, particularly for environmental containment applications, the walls are intended to serve as a permanent barrier with a life expectancy measured in decades. The compatibility of these barriers with the environment is considered during most design studies but a comprehensive review of the longevity of these walls is absent from the literature. This paper identifies key longevity issues, summarizes published literature to date and describes the current practice related to the longevity of soil-bentonite slurry trench cutoff walls. Principle issues potentially affecting long-term performance include compatibility between the backfill and the groundwater, impact of wetting/drying in the zone of the fluctuating water table, long-term property changes due to secondary compression of the backfill, potential for desiccation of the near-surface zone of the barrier wall and the potential for hydraulic fracturing due to the relatively low state of effective stress. The paper concludes with the authors’ summary opinions and suggestions for future research.
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© 2018 American Society of Civil Engineers.
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Published online: Jun 6, 2018
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ASCE Technical Topics:
- Backfills
- Bibliographies
- Construction engineering
- Construction methods
- Core walls
- Diaphragm walls
- Engineering fundamentals
- Environmental engineering
- Excavation
- Geotechnical engineering
- Groundwater
- Information management
- Pollutants
- Pollution
- Sludge
- Soil pollution
- Structural engineering
- Structural members
- Structural systems
- Trenches
- Trenchless technology
- Tunneling
- Tunnels
- Walls
- Wastes
- Water (by type)
- Water and water resources
- Water management
Authors
Affiliations
P.E.
Geo-Solutions, Inc., 1250 Fifth Ave., New Kensington, PA 15068. E-mail: [email protected]
P.E.
Dept. of Civil and Environmental Engineering, Bucknell Univ., Lewisburg, PA 17837. E-mail: [email protected]
Geo-Solutions, Inc., 1250 Fifth Ave., New Kensington, PA 15068. E-mail: [email protected]
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