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W 912 BU-06-C-0024的主持下收集大约100个新挖掘疏浚物（DM）样本的基本土壤指数和压实数据，该合同名为“米夫林堡处置区的可再生能力”。“这份为期一年（2006/7）的第一份有益使用合同的特点是从费城一个100英亩的遏制和处置设施（CDF）中清除50万立方码（CY）未经修改的DM，用于矿山复垦。该奖项利用了一个独特的和时间紧迫的机会，收集软，细粒DM（OH，MH，CH，OL，ML和CL土壤）的目标样品进行材料测试。 历史上用于DM的主要材料管理策略是将DM水力放置在CDF中，其他形式的高地处置集中在基于火山灰的处理（用于受污染的DM）。因此，原始DM压实数据是稀缺的，这主要是由于不熟悉和材料的高度可变性，在填充施工中使用带来了挑战。该领域的初步工作表明，DM不符合传统上使用的俄亥俄州DOT系列压实曲线，该系列压实曲线允许根据填充介质的变化快速调整现场压实标准。因此，该SGER奖项解决了一个重要的数据缺口（压实数据），可以使DM在城市和沿海环境中及其附近的建筑填料中使用。土壤指数和压实数据（约100套）的收集对于确定单点普罗克特曲线族（例如，AASHTO T272）可以为DM开发，并且这组曲线在某种程度上类似于ODOT曲线族。还将探讨基本土壤指标和压实行为之间的关系和相关性，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立即，通过扩大基本数据集，支持行业接受可持续的城市填土施工土工方法，对努力克服实施有益使用障碍的行业产生有形的和真实的影响和土地复垦。

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.