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Use of Saline Water in Compaction of Engineered Fills

机译：在工程填料的压实中使用盐水

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摘要

Many arid regions in the world have limited fresh water supplies but are near oceans or inland saline lakes. In these locations, it can be expensive and difficult to use fresh water for moisture conditioning during soil compaction of grading projects. However, local high salinity (ocean water or water from inland saline lakes or seas) water is often abundant and much less expensive than fresh water. Due to limited background research regarding the behavior of soils compacted using high salinity water, engineers generally prohibit its use for water conditioning required during compaction. The limited amount of literature on the subject suggests that using high salinity water instead of freshwater during compaction increases the maximum dry unit weight and reduces the optimum moisture content. However, the data are sparse and the effects of soil plasticity on compaction when using saline water have not been thoroughly investigated. Additionally, most of the published literature deals with the use of water from inland salt lakes with very high salinity levels. This paper reviews the current literature, presents new data in which ocean water is used to condition soils during compaction, and investigates the importance of clay content when compacting soils with high salinity water. Results confirm that use of ocean water also increases optimum dry unit weight and decreases optimum water content. Ocean water appears to be as effective as highly saline water. The changes in compaction behavior are evident at clay contents as low as 10 percent.
机译：世界上许多干旱地区的淡水供应有限，但靠近海洋或内陆盐湖。在这些地方，在平整项目的土壤压实过程中，使用淡水进行湿度调节可能很昂贵且困难。但是，当地的高盐度（海洋水或来自内陆盐湖或海水的水）通常比淡水丰富且便宜得多。由于有关使用高盐度水压实的土壤特性的背景研究有限，工程师通常禁止将其用于压实过程中所需的水调节。关于该主题的文献数量有限，表明在压实过程中使用高盐度水代替淡水会增加最大干燥单位重量，并降低最佳水分含量。但是，数据稀疏，尚未充分研究土壤可塑性对使用盐水时压实的影响。此外，大多数已发表的文献都涉及盐度很高的内陆盐湖水的使用。本文回顾了当前的文献，提供了在压实过程中使用海水调节土壤的新数据，并研究了在用高盐度水压实土壤时粘土含量的重要性。结果证实，使用海水还会增加最佳干燥单位重量并降低最佳水分含量。海水似乎和高盐分水一样有效。在低至10％的粘土含量下，压实性能的变化就很明显。

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