泥砾开挖料用于南水北调中线工程渠堤填筑的试验研究

Experimental Study of Boulder Clay Excavation Materials Used in the Embankment Filling of the South-to-North Water Transfer Project

南水北调中线一期工程邯邢渠段分布大量的泥砾，粒径含量不满足规范对堤防防渗体填筑的要求，如果将其弃掉，将占用大量的土地，并且还需另外征收大量的耕地取土筑堤，为此开展了泥砾开挖料筑堤的试验研究。试验通过对剔除150mm以上和300mm以上超径料的剔除法，以及立体开挖掺加上覆壤土的掺土法的研究，并结合室内压缩试验和渗变试验结果，初步确定了采用掺土法筑堤的可行性，并初步确定了碾压参数和最大干密度等指标，作为施工的参考。

The boulder clay particles are widely distributed in the Handan-Xingtai Section of the South-to-North Water Diversion Project, which do not meet the standard of the dike body filling requirements. Thrown-away the clay will take up a lot of land while additional cultivated land expropriation is needed for embankment filling. The experiment has carried out for boulder clay excavation material for embankment. By the re- search on the scalping methods in which the materials more than 150 mm and 300 mm are eliminated, and the mixed soil methods of three-dimen- sional excavation plus overlying loam, combined with the indoor compression test and seepage test results, we have preliminarily determined the feasibility of mixed soil embankment, and the indexes of the rolling parameters and the maximum dry density, which can provide a reference for construction.