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为了有效利用成武高速公路沿线隧道开挖产生的泥岩弃渣,在土样基本工程性质试验的基础上,针对试样开展了不同含水率的CBR试验,并在现场进行了泥岩弃渣填筑路基的施工方法及路基稳定性研究。研究结果表明:不同初始含水率条件下,浸水4昼夜后土样的CBR值与含水率曲线呈正态分布;泥质软岩土石混合料弃渣填筑路基的松铺厚度宜控制在40 cm左右,填料粒径不大于260 mm。按照现场试验推荐的施工方法可以达到高速公路及一级公路路床1.5 m以下路堤的压实度标准,路基结构稳定。
In order to make effective use of the mudstone spoil produced by tunnel excavation along the Chengwu Expressway, CBR tests with different moisture contents were carried out on the basis of the basic engineering test of soil samples, and the mudstone spoil filling Subgrade Construction Method and Subgrade Stability Research. The results show that the curves of CBR value and water content of soil samples are normal distribution under different initial moisture content for 4 days and 4 days after immersion. The thickness of loose concrete pavement filled with muddy rock-soil mixture should be controlled at 40 cm Around, filler particle size not more than 260 mm. According to the field test recommended construction methods can reach the expressway and highway roadbed 1.5m embankment compaction standards, roadbed structure is stable.