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一、前言某新线横跨嫩江河滩,须修建8公里多长、8～14米高的季节性浸水路堤。附近缺乏良好的填料,如利用当地的粉、细砂则可避免从十余公里外远距离运土。这样不仅可以降低造价,保证工期,而且不需占用大量农田。但是,在国内外现行的路基技术规范中都明确规定不准用粉、细砂作为河滩路堤的填料。因此,生产上迫切要求通过试验研究解决这一问题。规范中不准用粉、细砂作为浸水路堤填料的原因,是因为饱和粉、细砂在列车振动作用下有可能产生液化坍塌,过去利用粉、细砂修筑的路堤曾有这种坍塌的实例。但据调查也并非所有粉、细砂路基都发生
I. INTRODUCTION For a new line across the Nen River floodplain, seasonal flooding embankments of more than 8 kilometers long and 8 to 14 meters high shall be constructed. The nearby lack of good fillers, such as the use of local powder, fine sand can avoid long-distance travel from more than 10 kilometers. This not only can reduce the cost, ensure the construction period, but also does not need to occupy a large amount of farmland. However, the existing subgrade technical specifications at home and abroad have clearly stipulated that powder and fine sand should not be used as filling materials for embankment on river banks. Therefore, there is an urgent need in production to solve this problem through experimental research. The reason why the use of powder and fine sand as fillers for flooded embankments is not allowed in the specification is that saturated powder and fine sand may be liquefied and collapsed under the action of train vibration. In the past, embankments constructed using powder and fine sand used to have such collapse examples. . However, according to the survey, not all powder and fine sand roadbeds have occurred.