Subsidence of residual soils in a karst terrain

Technical Report · Fri Jun 01 00:00:00 EDT 1990

DOI:https://doi.org/10.2172/6512544· OSTI ID:6512544

Drumm, E C; Kane, W F; Ben-Hassine, J; Scarborough, J A ^[1]; Ketelle, R H ^[2]

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1. Tennessee Univ., Knoxville, TN (USA)
2. Oak Ridge National Lab., TN (USA)

Siting and operating landfills for solid waste disposal in eastern Tennessee that can operate with minimum impact on groundwater is problematic. The operational requirement of thick, excavational soils and the regulatory requirement of a buffer between disposal units and an aquifer result in siting most operating East Tennessee landfills in outcrop areas of the Knox Group. However, the common occurrence of karst terrain and sinkholes in the Knox Group indicates the vulnerability of such sites to rapid groundwater recharge and flow and the potential for subsidence or collapse of soil into bedrock cavities. To address the potential for subsidence or collapse of soils at the East Chestnut Ridge site on the Department of Energy's (DOE) Oak Ridge Reservation (ORR), the following activities and analyses were completed: The locations of karst features on the site were determined by field reconnaissance; several sinkholes were selected for detailed examination; soil boring, sampling, and physical testing were performed in soils located within, adjacent to, and outside of sinkholes to characterize soil strength at various depths; detailed plane surveys were made for 11 sinkholes to measure accurately their dimension and shape for use in determining profile functions for subsidence basins at the site; The stress-deformation response of a typical soil profile overlying a hypothetical bedrock cavity was analyzed numerically for a range of soil thickness and a range of cavity radii. A consistent estimate of the relationship between subsidence basin dimension, soil thickness, and cavity radius has been derived. 30 refs., 41 figs., 7 tabs.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: DOE/EH
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6512544
• Report Number(s): ORNL/TM-11525; ON: DE91001008
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
SOILS
GROUND SUBSIDENCE
CAVITIES
FINITE ELEMENT METHOD
GROUND WATER
NUMERICAL ANALYSIS
OAK RIDGE RESERVATION
ORNL
ROCKS
SANITARY LANDFILLS
WASTE DISPOSAL
WATER TABLES
HYDROGEN COMPOUNDS
MANAGEMENT
MATHEMATICS
NATIONAL ORGANIZATIONS
NUMERICAL SOLUTION
OXYGEN COMPOUNDS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
WASTE MANAGEMENT
WATER
540250* - Environment
Terrestrial- Site Resource & Use Studies- (1990-)
052002 - Nuclear Fuels- Waste Disposal & Storage