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围绕南宁膨胀土能否直接用作路堤填料问题,系统开展了该类膨胀土的各种土性和路用性能试验研究。通过详细整理测试数据、系统分析试验成果,全面对照膨胀土路堤物理处治技术中新的填料分类指标体系,从路基填料的强度、变形和施工可碾压性3个方面逐一展开分析论证。结果表明:除一处土样天然稠度不满足要求外,其余南宁膨胀土均可直接用来填筑外环公路的下路堤;所得结果为该段路基实施物理处治方案设计提供了理论依据和参数。
Around Nanning expansive soil can be used directly as a embankment filler, the system carried out a variety of expansive soil of various soil and road performance test. Through detailed arrangement of the test data and systematic analysis of the experimental results, a comprehensive comparison of the new filler classification index system in the physical treatment technology of expansive soil embankment is carried out. The analysis and demonstration are carried out one by one from three aspects of the strength, deformation and construction compaction of the subgrade filler. The results show that except for the natural consistency of one soil sample, the remaining Nanning expansive soil can be directly used to fill the embankment of the outer ring road. The obtained results provide the theoretical basis and parameters for the physical treatment scheme design of the subgrade .