Location

St. Louis, Missouri

Session Start Date

6-1-1993

Abstract

Stabilizing sand-filled solution chimneys in karst terrain for the construction of sanitary landfills is challenging for geotechnical engineers. A ground water contamination assessment conducted at a sanitary landfill in north central Florida indicated that landfill leachate was contaminating the Floridian Aquifer. To expand the landfill, the Florida Department of Environmental Regulation (FDER) required that a liner system be constructed and that stringent landfill subgrade preparation be performed to minimize the potential for sinkhole formation and subsequent damage to the liner system. To meet the requirements, the following foundation soil preparations were performed: (1) prerolling the subgrade with vibratory rollers, (2) scanning the subgrade with ground-penetrating radar (GPR) to locate potential subgrade anomalies, (3) confirming the GPR results with cone penetrometer tests (CPTs), (4) densifying loose sand with compaction grouting in solution chimneys identified by GPR and CPTs, (5) confirming the compaction grouting results with CPTs, and (6) proof-rolling the subgrade.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Third Conference

Publisher

University of Missouri--Rolla

Publication Date

6-1-1993

Document Version

Final Version

Rights

© 1993 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Jun 1st, 12:00 AM

Foundation Soil Preparation for Landfills in Karst Terrain

St. Louis, Missouri

Stabilizing sand-filled solution chimneys in karst terrain for the construction of sanitary landfills is challenging for geotechnical engineers. A ground water contamination assessment conducted at a sanitary landfill in north central Florida indicated that landfill leachate was contaminating the Floridian Aquifer. To expand the landfill, the Florida Department of Environmental Regulation (FDER) required that a liner system be constructed and that stringent landfill subgrade preparation be performed to minimize the potential for sinkhole formation and subsequent damage to the liner system. To meet the requirements, the following foundation soil preparations were performed: (1) prerolling the subgrade with vibratory rollers, (2) scanning the subgrade with ground-penetrating radar (GPR) to locate potential subgrade anomalies, (3) confirming the GPR results with cone penetrometer tests (CPTs), (4) densifying loose sand with compaction grouting in solution chimneys identified by GPR and CPTs, (5) confirming the compaction grouting results with CPTs, and (6) proof-rolling the subgrade.