Physical and mechanical properties of waste ground at inert waste landfills.
Physical and mechanical properties of waste ground at inert waste landfills.
复制标题
惰性废物填埋场废物地面的物理和机械特性。
DOI：
10.1016/j.wasman.2021.07.001
复制
发表时间：
2021
期刊：
影响因子：
8.1
通讯作者：
Shimon Ideguchi
中科院分区：
文献类型：
--
作者：
Purbashree Sarmah;T. Katsumi;A. Yamawaki;A. Takai;K. Omine;T. Ishiguro;Yoichi Doi;Y. Nakase;Shimon Ideguchi
在日本4个惰性废物填埋场的14个地点检查了废物地面的物理和机械特性，目的是建立一种针对惰性废物填埋场的安全和具有成本效益的设计方法。进行了成分分析、基本物性、休止角、CASPOL冲击值试验和现场直剪试验。惰性废物主要由纤维、颗粒和类土3种成分组成，其含量分别在3.6-54%、13-45%和43-74%之间。随着回收后纤维含量和龄期的增加，含水率增加，气孔率降低。作为承载能力指标的冲击值（Ia）随着干密度的增大而增大。所有地点的雪崩后休止角（αa）均在34 ~ 44°之间。直剪试验中，黏聚力(c)和内摩擦角（φ）分别为2 ~ 21 kN/m2和22 ~ 59°。在25.55 kN/m2的法向应力下，这些数值得到的剪应力高于城市生活垃圾，特别是纤维组分在14 ~ 31%之间的垃圾。随着干密度的增大，φ增大，φ减小。对于惰性垃圾填埋场，φ与φ的相关系数分别为= 4.10Ia−21.32和φ= - 4.61Ia+ 82.37。最后，在规划、填埋和未来扩建三个设计阶段讨论了本研究结果的利用。
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, andin situdirect 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 (Ia), which is an indicator of the bearing capacity, increased as the dry density increased. For all locations, the angle of repose after avalanche (αa) 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/m2and 22–59°, respectively. The shear stresses obtained from thesecandφvalues 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.cincreased andφdecreased as the dry density increased. The correlation calculated forcandφwithIafor inert waste landfill werec= 4.10Ia− 21.32 andφ= −4.61Ia+ 82.37. Finally, the utilization of the results obtained in this study is discussed in three design stages: planning, landfilling, and future expansion.