摘要
鉴于使用细粒土评价土石混填路基材料的性能适用性及合理性不足,通过对不同粗颗粒含量及不同最大粒径的30种不同级配的土石混填材料进行击实试验,分析了粗颗粒含量与最大粒径对混填路基材料的影响。考虑了密度干涉系数、校正系数,提出了新的最大干密度的理论计算方法。与传统方法相比,新方法的计算结果更接近实测值,且相对误差减小了73%。
Composition of gradation, changes of moisture content and strength formation mechanism of earth-rock mixed materials are different from general fine grained soil, and coarse particle plays a dominant role in it. But when evaluation method of compaction quality of fine grained soil is used to evaluate earth-rock mixed materials, the disadvantages of the applicability and rationality are obvious. 30 sets of earth-rock mixed materials were picked to carry out the compaction tests in order to analyze the influences of coarse particle content and maximum particle size on the maximum dry density and optimum moisture content of fine grained soil. Parameters such as density interference factor and correction factor were considered, and the calculation methods of maximum dry density were put forward. Relative error decreased by 73 ~//00 with the new method compared with traditional method.
出处
《筑路机械与施工机械化》
2014年第8期57-61,共5页
Road Machinery & Construction Mechanization
基金
国家自然科学基金项目(51178056)
关键词
土石混填路基
压实质量
最大干密度
粗颗粒
subgrade filled with earth-rock mixture
compaction quality
maximum dry density
coarse particle
