SGER: Data Collection To Ground Truth A "Dredged Material Family of Compaction Curves"

该合同支持在美国工程兵团（USACE）合同编号W912BU-06-C-0024的支持下，为大约100个新挖掘的疏浚材料（DM）样本收集基本土壤指数和压实数据，该合同名为“Fort Mifflin处置区的可再生能力”。这份为期一年（2006/ 07）的合同是首个此类受益使用合同，其特点是从费城一个100英亩的密封和处置设施（CDF）中清除500,000立方码（CY）未经修改的DM，用于矿山复建。该奖项利用了一个独特的、时间紧迫的机会来收集软的、细粒度DM （OH、MH、CH、OL、ML和CL土壤）的目标样品，用于材料测试。历史上用于DM的主要材料管理策略是在CDFs中水力放置DM，而其他形式的高地处置则侧重于以火山灰为基础的处理（用于污染DM）。因此，原始的DM压实数据是稀缺的，这主要是由于不熟悉和材料的高可变性，在填充施工中引入了挑战。该领域的初步工作表明，DM不遵循传统上使用的俄亥俄州DOT压实曲线族，这允许由于填充介质的变化而在现场快速调整压实标准。因此，该SGER奖解决了一个重要的数据缺口（压实数据），这可以使DM在产生材料的城市和沿海环境及其附近的施工填充物中使用。土壤指数和压实数据（约100组）的收集对于确定是否可以为DM开发一组单点Proctor曲线（例如AASHTO T272）以及这组曲线在多大程度上类似于ODOT曲线族是必不可少的。土壤基本指标与压实行为之间的关系和相关性也将被探讨，包括有机质含量对土壤性质的不明确作用。这项工作提供的定量数据将对一个行业产生直接、切实和实际的影响，该行业正在努力克服实施有益使用的障碍，扩大基本数据集，支持行业接受城市填筑和土地复垦的可持续岩土技术方法。

This award supports the collection of basic soil indices and compaction data for approximately 100 samples of freshly excavated dredged material (DM) under the auspices of US Corps of Engineers (USACE) contract number W912BU-06-C-0024, entitled, Renewable Capacity at the Fort Mifflin Disposal Area." This 1-year (2006/7) and first of its kind beneficial use contract features the removal of 500,000 cubic yards (CY) of unmodified DM from a 100-acre containment and disposal facility (CDF) in Philadelphia for mine reclamation. The award leverages a unique and time critical opportunity to collect targeted samples of soft, fine-grained DM (OH, MH, CH, OL, ML, and CL soils) for materials testing. The main materials management strategy historically utilized for DM has been the hydraulic placement of DM in CDFs, and other forms of upland disposal have focused on pozzolanic-based treatment (for contaminated DM). As such, raw DM compaction data is scarce, which introduces challenges for use in fill construction mainly due to unfamiliarity and high material variability. Preliminary work in this area has indicated that DM does not adhere to the traditionally used Ohio DOT family of compaction curves, which allows for the rapid adjustment of compaction criteria in the field owing to changes in the fill media. Accordingly, this SGER award resolves an important data gap (compaction data) which can enable the use of DM in constructed fills in and near the urban, coastal environment where the material is generated. The collection of soil index and compaction data (~100 suites) is essential for determining if a family of one-point Proctor curves (e.g., AASHTO T272) can be developed for DM, and the extent to which this set of curves is analogous to the ODOT family of curves. Relationships and correlations between basic soil indices and compaction behavior also will be explored, including the unclear role of organic matter content on soil properties.The quantitative data provided by this work will have immediate, tangible and real impacts on an industry struggling to overcome barriers to implementing beneficial use by enlarging essential data sets that support industry acceptance of sustainable geotechnics approaches to urban fill construction and land reclamation.