Long -Term Settlement Behavior of Landfills with Consideration of Refuse Decomposition

분해가 고려된 쓰레기 매립지의 장기 침하 거동

  • Park, Hyeon-Il (Dept. of Civil Engineering, Korea Advanced Institute of Science and Technology) ;
  • Lee, Seung-Rae (Dept. of Civil Engineering, Korea Advanced Institute of Science and Technology) ;
  • Go, Gwang-Hun
  • Published : 1998.02.01

Abstract

In refuse landfill, long-term settlement is considerably dependent upon the biological decomposition of refuse which is distinguished from typical soil behavior. Two equations are combined in order to model long-term settlement behavior of refuse landfill caused by mechanical secondary compression and secondary compression caused by the decomposition of biolegradable refuse. It is suggested that mechanical secondary compression is linear with respcet to the logarithm of time. In order to estimate the settlement that occurs due. to the decomposition of biodegradable refuse, a mathematical model is used which theoretically conoiders the decomposition process related to the solubilization stage of biodegradable refuse solid. This model is based on hydrolysis process and expressed as first order kinetics. The proposed model is applied to Lysimeter compression data of an old refuse. This paper intends to propose the simplest mathematical model which effectively represents settlement caused by the solubilization stage of biodegradable refuse solid on decomposition process.

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