This paper presents the results of a comprehensive geotechnical laboratory testing for the assessment and design of a proposed biosolid monofill facility at the As-Samra Waste Water Treatment Plant (WWTP) in Jordan. Previous landfill operations for biosolid materials typically involved co-disposal or lagooning of the dewatered biosolid slurry. However, it is proposed that the solar-dried As-Samra WWTP biosolid material will be placed in a new monofill facility at the site. This approach is suited to the As-Samra desert climate, since the material’s water content can be readily reduced to between 60 and 100% in evaporation lagoons. New insights were gained on the strength and compressibility of the non-inundated and saturated compacted biosolid materials, including their (a) very low normalised undrained strength ratio and effective angle of shearing resistance values for the saturated normally consolidated states of 0·14 and 15°, respectively; (b) very high strain rate dependency of strength; and (c) extremely low permeability coefficient values on the order of 10⁻¹² m/s for compaction at approximately 100% water content. The paper concludes with recommendations on the appropriate water content range for compaction of the material in the proposed monofill and the selection of design strength values for geotechnical stability analysis.

中文翻译：

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用于单填充设计的压实生物固体的岩土特性，约旦阿斯萨姆拉

本文介绍了综合岩土实验室测试的结果，用于评估和设计约旦As-Samra废水处理厂（WWTP）的拟建生物固体填充料设施。先前用于生物固体材料的垃圾填埋场操作通常涉及脱水生物固体浆料的共同处置或泻湖处理。但是，建议将太阳能干燥的As-Samra污水处理厂生物固体材料放置在该地点的新料仓中。这种方法适合于As-Samra沙漠气候，因为在蒸发泻湖中，材料的水分含量很容易降低到60％至100％。新的见解获得了在非淹没和饱和压实生物固体材料的强度和压缩，包括他们的（一）分别在0·14和15°的饱和正常固结状态下的极低归一化不排水强度比和抗剪强度值有效角；（b）应变率对强度的依赖性很高；（c） 在大约100％的水含量下压实的渗透系数极低，约为10 ^-12 m / s。本文最后给出了建议的单填充料中压实材料的合适含水量范围以及为岩土工程稳定性分析选择设计强度值的建议。