Location
St. Louis, Missouri
Date
02 Jun 1993, 2:30 pm - 5:00 pm
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
Meeting Name
3rd Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1993 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Chang, Kou-Roung and Carter, John, "Foundation Soil Preparation for Landfills in Karst Terrain" (1993). International Conference on Case Histories in Geotechnical Engineering. 28.
https://scholarsmine.mst.edu/icchge/3icchge/3icchge-session07/28
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.
