Design and construction of a deep slurry trench barrier

Conference · Wed Dec 31 04:00:00 EST 1997

OSTI ID:576509

Deming, P W ^[1]

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1. Mueser Rutledge Consulting Engineers, New York, NY (United States)

A 24 m (80 ft) deep slurry trench surrounding a former chromium manufacturing facility on the Patapsco River in Baltimore, Maryland was constructed in 1995 to contain groundwater and site Soils, and to reduce the volume of groundwater extracted to maintain an inward gradient. In 1992, an embankment made of crushed stone was constructed in the Patapsco River to make land for barrier construction outboard of the bulkheads, and to protect the barrier. Stability of the slurry-supported trench excavation in the embankment required construction from an elevated work platform. An extended reach backhoe was used to excavate the deep slurry trench and to clean the trench bottom. Soil-Bentonite backfill was prepared at a central mixing area and transported by truck to the perimeter barrier. A synthetic membrane was inserted partially into the backfill for connection to a multimedia cap, and for redundancy and erosion control in the tidal zone. Hydraulic testing of the aquitard contained by the barrier demonstrated excellent performance of the barrier and bottom closure. Detailed definition of subsurface conditions and the closure stratum was necessary for the design and successful construction of the barrier, and is recommended for comparable slurry trench construction projects.

• Research Organization: USDOE, Washington, DC (United States)
• OSTI ID: 576509
• Report Number(s): CONF-970208--Proc.; ON: DE98001967
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
54 ENVIRONMENTAL SCIENCES
BENTONITE
CHROMIUM
CONSTRUCTION
CONTAINMENT
EROSION CONTROL
EXCAVATION
MECHANICAL PROPERTIES
PERFORMANCE
PERMEABILITY
POLLUTION CONTROL
SOILS
STABILITY
SYNTHETIC MATERIALS