江汉平原填砂路堤大厚度填筑压实参数试验研究

Research on the Compaction Parameters of Sand-filled Embankment Using Larger Thickness Technology in Jianghan Plain

针对江汉平原修建高速公路所面临的软基广泛分布、长江青砂资源丰富等特点,提出了填砂路堤大厚度填筑技术方案,砂料松铺厚度可由规范要求的30cm提升至70cm.通过现场碾压试验,并分3层检测砂料全厚度压实度,对比了3种不同碾压试验方案的压实效果及其均匀性,从中得出最佳压实参数.大厚度填筑技术相较于传统厚度填筑技术,在确保工程质量的前提下,可大幅度节省工期.

The study proposes a new technique of highway sand embankment filling in Jiang Han Plain,which can raise the thickness of sand filling layer from 30 cm to 70 cm.Both the degree and uniformity of sand compaction are checked based on the comparison among three compacting proposals carried out on the test field.In addition,the compaction parameters are optimized based on the field tests,which can ensure the quality of sand embankment construction and significantly shorten the construction period.