The physical and mechanical properties of waste ground were examined at 14 locations across 4 inert waste landfills in Japan with the goal of establishing a safe and cost-effective design methodology specific to inert waste landfills. Composition analysis, basic physical properties, angle of repose, CASPOL impact value tests, and in situ direct shear tests were conducted. Inert wastes were comprised of three main components: fibrous, granular, and soil-like content, and their compositions varied between 3.6–54%, 13–45%, and 43–74%, respectively. As the fibrous content and age after reclamation increased, the water content increased but the percentage air voids decreased. The impact value (I_a), which is an indicator of the bearing capacity, increased as the dry density increased. For all locations, the angle of repose after avalanche (α_a) was found between 34 and 44°. In direct shear tests, the cohesion (c) and internal angle of friction (φ) ranged from 2 to 21 kN/m² and 22–59°, respectively. The shear stresses obtained from these c and φ values were higher than those for the municipal solid wastes, particularly for landfills with fibrous fractions ranging 14–31% under a normal stress of 25.55 kN/m². c increased and φ decreased as the dry density increased. The correlation calculated for c and φ with I_a for inert waste landfill were c = 4.10I_a − 21.32 and φ = −4.61I_a + 82.37. Finally, the utilization of the results obtained in this study is discussed in three design stages: planning, landfilling, and future expansion.

在日本 4 个惰性垃圾填埋场的 14 个地点检查了垃圾场的物理和机械特性，目的是建立一种安全且具有成本效益的惰性垃圾填埋场设计方法。进行了成分分析、基本物理性能、休止角、CASPOL 冲击值试验和原位直剪试验。惰性废物由三个主要成分组成：纤维状、颗粒状和土壤状成分，它们的成分分别在 3.6-54%、13-45% 和 43-74% 之间变化。随着再生后纤维含量和年龄的增加，含水量增加，但空隙率下降。影响值 ( I _a)，这是承载能力的指标，随着干密度的增加而增加。对于所有位置，雪崩后的休止角 ( α _a ) 都在 34 到 44° 之间。在直接剪切试验中，内聚力 ( c ) 和内摩擦角 ( φ ) 的范围分别为 2 至 21 kN/m ²和 22-59°。从这些c和φ值获得的剪切应力高于城市固体废物的剪切应力，特别是对于在 25.55 kN/m ²的法向应力下纤维含量范围为 14-31% 的垃圾填埋场。c增加和φ随着干密度的增加而降低。对于计算出的相关Ç和φ与我_一个用于惰性垃圾填埋场是C ^  = 4.10我_一个 - 21.32和φ = -4.61我_一个 + 82.37。最后，在三个设计阶段讨论了在本研究中获得的结果的利用：规划、填埋和未来扩展。