赵然杭 华丽丽 刘恒洋

摘 要：黄河泥沙的利用是维持黄河健康发展的突破口。为分析黄河泥沙用于高速公路路基填筑的可行性，取引黄济青渠首沉沙池中淤积的黄河泥沙，进行筛分、击实、液塑限联合测定、承载比等公路土工试验，并对长深高速高青至广饶段K23+620—K23+720路基施工现场应用情况进行检测。试验结果为：黄河泥沙属于公路土中级配良好的砂类土，最大干密度范围为1.62～1.65 g/cm3，最佳含水率范围为14.0%～14.7%，液限为29.5%，塑性指数为9%，承载比为16.8%，工程现场检测上路床压实度均值为97.2%，下路堤压实度均值为95.1%，均满足规范要求，表明黄河泥沙用于高速公路路基填筑是可行的。

关键词：黄河泥沙;土工试验;路基填料

Abstract：The utilization of the Yellow River sediment is a breakthrough to maintain the healthy development of the Yellow River. In order to analyze the feasibility of the Yellow River sediment used in highway roadbed filling， the silted Yellow River sediment in the sediment basin at the head of the Yellow River-Qingdao Canal was taken for screening， compaction， joint determination of liquid-plastic limit， CBR and other highway geotechnical tests， and the field application of K23+620-K23+720 roadbed construction in Gaoqing-Guangrao section of Changshen Expressway was tested. The test results show that the Yellow River sediment belongs to sandy soil with good gradation in highway soil; the maximum dry density ranges from 1.62 g/cm3 to 1.65 g/cm3; the optimum moisture content ranges from 14.0% to 14.7%; the liquid limit is not more than 50% and the plastic index is not more than 26%; California Bearing Ratio is 16.8%; the average compactness of the upper roadbed and the lower embankment is 97.2% and 95.1%， which meet the requirements of the specification， indicating that the Yellow River sediment is feasible for highway subgrade filling.

Key words： Yellow River sediment; soil test; subgrade fill

1 引 言

长期以来，泥沙问题是黄河的一个心腹大患，而对于黄河泥沙的研究一直受到国家和有关专家学者的高度重视，“治水先治沙”也一直是治理黄河的一大方针。近年来，随着技术水平的提高和经济社会的发展，人们开始不局限于对泥沙进行治理，而将泥沙视为一种资源，转为对泥沙进行利用。

从广义角度划分，黄河泥沙利用方式可以分为自然利用和人工利用两大方面[1]，自然利用包括填海造陆、平原塑造，人工利用泥沙的措施包括砌体材料、建筑砂料等。王晓彤等[2]在利用黄河泥沙充填采煤沉陷地方面进行了深入研究，通过对比黄河下游泥沙与山东省济宁市采煤沉陷区农田土壤的理化性状，表明黄河泥沙是一种绿色、安全的充填材料。相关研究[3]表明，黄河泥沙的硅酸盐类属性，使其可以作为矿产资源进行开发，也可作为制造陶瓷及玻璃制品的原料。……