关键词: 生活垃圾, 腐殖土, 力学性质, 填埋龄期, 压实度

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