Environmental Sanitation Engineering ›› 2024, Vol. 32 ›› Issue (5): 104-111.doi: 10.19841/j.cnki.hjwsgc.2024.05.016

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The Influence of Landfilled Age and Compaction Degree on Mechanical Properties of the Waste Humus Soil

SHENG Yan, LIN Huansheng, DU Yuelin, DING Qianshen, LIU Lei   

  1. 1. Shenzhen Tagen Pingshan Construction Engineering Co. Ltd.,; 2. Wuhan Hanyang Municipal Construction Group Co. Ltd.; 3. College of Mechanics and Engineering, Liaoning Technical University; 4. State Key Laboratory of Geomechanics and Geotechnical Engineering, Wuhan Institute of Rock and Soil Mechanics, Chinese Academy of Sciences; 5. Hubei Province Key Laboratory of Contaminated Sludge and Soil Science and Engineering
  • Online:2024-11-01 Published:2024-11-01

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Abstract: The mechanical properties of waste humus soil are of great significance to its reuse in geotechnical engineering. The humus soil retrieved from the landfill site was used as the object, based on saturation permeability test, unconfined compressive strength test, direct shear test and consolidation compression test, the influence of landfill age and compaction degree on the mechanical properties of humus samples was analyzed, and discussed the influence mechanism. The results showed that the permeability coefficient of the compacted humus was in the order of 10-5-10-7 cm/s, and with the increase of landfill age and compaction degree, the permeability coefficient all decreased and tended to a stable value. The mechanical properties of compacted humus soil were significantly affected by landfill age and compacted degree, the unconfined compressive strength, elastic modulus, cohesive force and compression modulus all increased with the increase of landfill age and compaction degree. While the compression coefficient decreased with the increase of landfill age and compaction degree. The above results provided key theoretical support for the reuse of humus soil.

Key words: domestic waste, humus soil, mechanical characters, landfill age, degree of compaction

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