Long-term and residual settlement behaviour of a multi-staged municipal solid waste landfill, Republic of Korea

• Published in: Waste management & research Vol. 40; no. 3; pp. 314 - 322
• Main Authors: Jo, Young-Seok, Jang, Yeon-Soo
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01.03.2022; Sage Publications Ltd
• Subjects: Biodegradation; Landfill; Landfill construction; Landfills; Lifts; Models, Theoretical; Municipal landfills; Municipal solid waste; Municipal waste management; Refuse Disposal; Republic of Korea; Solid Waste - analysis; Solid waste management; Time dependence; Vertical loads; Waste Disposal Facilities; Waste disposal sites; Yard waste; Republic of Korea; multi-staged municipal solid waste landfill; biodegradation of organic matters; Gimpo Metropolitan Landfill; residual settlement; time-dependent settlement; characteristics of the landfill settlement
• ISSN: 0734-242X; 1096-3669
• DOI: 10.1177/0734242X21994750

In this study, characteristics of the long-term landfill settlement are analysed and the starting date of residual settlement is deduced using the data of the landfill 1 of the Gimpo Metropolitan Landfill (GML) measured for 27 years. The landfill 1 is a multi-staged municipal solid waste landfill where dykes are constructed after landfilling for subsequent waste fills. The landfilling began in 1992 and finished in 2000, and the waste settlement measurement continued throughout this period. The older waste of the lower lift shows higher biodegradation and larger settlement than the waste of the upper lift, which acts as vertical load. Large settlement occurred in the lower lifts due to the collapse of waste voids caused by the overburden load of the upper lifts after biodegradation of waste in the lower lifts during long-term landfilling. In the conventional landfills, that is, mono-layer landfills, the time-dependent settlement generally occurs after the stress-dependent settlement. But, most of the time, this landfill showed mainly the time-dependent settlement. The duration, at which the biodegradation of organic matters is reduced and the residual settlement begins, was 8.8 years in average and the date range was from 7.6 to 11.7 years considering each disposed block in landfill 1. This date is obtained by calculating from the mid-point time of the landfilling duration.