沪嘉公路沿线穿越好几段软土淤泥地段,路基填土高达3～4米,由于上海市地表土天然含水量较高(一般在25％以上,甚至超过30％),超过土基压实的最佳含水量,亦不易风干。如不采取措施,势必延长工期,给高路堤带来长期不易稳定的后患。为此,沪嘉公路指挥部决定把电厂的粉煤灰试用于沪嘉公路,作为高填土的部份填料,观察其是否能代替砂砾石作间隔土滤水层和减轻高路堤的自重,以求加速高路堤的稳定目的。上海市市政工程研究所接受沪嘉公路指挥部委托,对此进行了试验研究。并对粉煤灰的物理化学和力学等性能与当地用土的相关性能作了分析对比研究,以供施工和设计参考。 Shanghai-Jia Highway along several soft soil silt lots, subgrade fill up to 3 to 4 meters, due to the high natural surface water in Shanghai soil (usually more than 25%, even more than 30%), more than compaction of soil The best moisture content, nor easy to dry. If no measures are taken, it is bound to extend the construction period and bring inconvenience to the high embankments in the long run. To this end, the Shanghai-Jia Highway Command decided to try the power plant fly ash on Shanghai-Jia Highway, as part of the high-fill filler to observe whether it can replace sand and gravel as a spacer soil layer and reduce the weight of high embankment, In order to speed up the stability of high embankment purposes. Shanghai Municipal Engineering Institute commissioned by the Shanghai-Jia Highway headquarters commissioned, conducted a pilot study. And the physical and chemical properties of fly ash and other properties of the local soil with comparative analysis made for construction and design reference.