Environmental Sanitation Engineering ›› 2025, Vol. 33 ›› Issue (1): 1-8.

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Research on Compression Characteristics of Waste Soil Based on Waste Classification

After the kitchen waste is separated from the domestic waste, the changes of waste component leads to the changes of compression characteristics of waste soil, which affects the landfill capacity and design parameter values for expansion.In order to study the compression characteristics of waste soil after the changes of waste component, indoor consolidation compression tests were carried out on the waste soil samples with kitchen waste contents of 30%, 20%, 10% and 0. The results showed that the modified primary compression index of waste soil decreased with the reduction of kitchen waste content. The fresh waste soil had a high sensitivity to stress changes, and its consolidation coefficient decreased from 10-4 cm2/s to 10-5 cm2/s under the gradual application of consolidation stress, while the classified waste soil was less sensitive to stress changes. The analysis of the secondary compression index data under different stress conditions showed that the changes of kitchen waste content had a great influence on the secondary compression characteristics under lower stress conditions, and the influence of the changes of kitchen waste content on the secondary compression characteristics decreased with the increase of stress.   

  1. 1. School of Earth Science and Engineering, Hohai University; 2. Institute of Water Science and Technology, Hohai University; 3. Jiangsu Suyan Jingshen Co. Ltd.
  • Online:2025-03-04 Published:2026-03-05

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Abstract: After the kitchen waste is separated from the domestic waste, the changes of waste component leads to the changes of compression characteristics of waste soil, which affects the landfill capacity and design parameter values for expansion.In order to study the compression characteristics of waste soil after the changes of waste component, indoor consolidation compression tests were carried out on the waste soil samples with kitchen waste contents of 30%, 20%, 10% and 0. The results showed that the modified primary compression index of waste soil decreased with the reduction of kitchen waste content. The fresh waste soil had a high sensitivity to stress changes, and its consolidation coefficient decreased from 10-4 cm2/s to 10-5 cm2/s under the gradual application of consolidation stress, while the classified waste soil was less sensitive to stress changes. The analysis of the secondary compression index data under different stress conditions showed that the changes of kitchen waste content had a great influence on the secondary compression characteristics under lower stress conditions, and the influence of the changes of kitchen waste content on the secondary compression characteristics decreased with the increase of stress.

Key words: waste classification, kitchen waste content, compressive characteristic, consolidation coefficient

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