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以武昌至广州客运专线上遇到的白垩系—下第三系以及元古界全风化及强风化千枚状板岩为例,在分析软岩的基本特征的基础上,考虑软岩粗细颗粒相对含量不同对软岩作为路基填料的工程性质的影响,设计正交试验,对不同粗粒含量的软岩试样进行了室内标准重型击实试验,得到了千枚状板岩填筑路基的最优含水量、最大干密度。分析了粗粒含量、击实功的大小以及软岩颗粒的易破碎特性等因素对最大干密度和最优含水量的影响,为软岩填筑路基的施工参数的确定提供了一定的理论依据。
Taking the Cretaceous-Lower Tertiary metamorphic metamorphic and strongly weathered thousand-shaped slate encountered on Wuchang-Guangzhou Passenger Dedicated Line as an example, based on the analysis of the basic characteristics of soft rock, The relative content of soft rock as a subgrade filler of engineering properties, design of orthogonal test, soft rock samples of different coarse content of the indoor standard heavy compaction test, get the thousands of slate filled roadbed Optimal water content, maximum dry density. The influences of the content of coarse particles, the size of compacting work, the fragility of soft rock particles on the maximum dry density and the optimum water content were analyzed, which provided a theoretical basis for the determination of the construction parameters of soft rock filled roadbed .