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南宁盆地是广西典型的膨胀土分布区之一,如何合理利用膨胀土筑路、减少弃方、保护环境是南宁外环高速公路勘察设计需解决的关键技术。在分析该路段膨胀土的基本工程特性基础上,通过大量的土质试验、化学改良试验、改进CBR试验和稠度试验,得出用物理处治技术填筑膨胀土路堤是安全、经济、环保且施工方便的有效方法,为合理利用膨胀土、搞好南宁外环公路设计提供了依据,可供其他膨胀土地区路堤设计参考和借鉴。
Nanning Basin is one of the typical expansive soil distribution areas in Guangxi. How to make rational use of expansive soil roads, reduce discards and protect the environment are the key technologies to be solved in the survey and design of Nanning Outer Ring Expressway. Based on the analysis of the basic engineering characteristics of the expansive soil in this section, it is concluded that it is safe, economical, environmentally friendly and convenient to construct by embracing the expansive soil embankment with physical treatment technology through lots of soil tests, chemical modification tests, CBR tests and consistency tests. Effective methods for the rational use of expansive soil, do a good job design Nanning Outer Ring Road provides a basis for other expansive soil embankment design reference and reference.