In the light of its special property being not easy to gain strength , through mechanics researches on different methods to stabilize this kind of low _ liquid _ limit silty soil as subbase material , evaluated both technically and economically , we have got a cement lime stabilization plan to meet the index requirements for non _ side _ limit strength of compression of subbase of class2 road stipulated in the specification ; by means of improving the workmanship , thickening the loose layer of soil , adding soil on covering weave fabric before compaction , such problems can be solved as very poor compaction , loose surface during compaction , roughness and unevenness , coats of layer and shear damages 本文针对黄河冲积而成的低液限粉土其粘粒含量极低、土的不均匀系数很小、胶体活性差的工程特性,通过采用不同方法稳定该类土作底基层材料的力学性能研究,从技术、经济角度综合评价,得到满足规范抗压强度指标要求的水泥石灰稳定方案。通过对原材料、试验配合比设计、施工、等方面进行优化,从而显著减轻了基层的早期及长期缩裂程度,从而提高了路面的耐久性。
Then , using the large - scale coarse grained soil test system , the relative density and direct shear characteristics of sand - gravel mixtures in different size distribution were tested . and the soc affecting mechanism derived from non - uniform granular material was discussed . the phenomenon can be observed that , along with the increase of non - uniform degree , the accumulate structure will become more complex , and the sliding resistance among sands will grow accordingly 在此基础上，利用大型粗颗粒实验系统，测定不同非均匀系数沙石材料的相对密度和直剪特性，探讨了颗粒非均匀程度对自组织临界性影响的具体物理力学机制：随着非均匀度的增大，散粒堆积体的颗粒结构空间分布堆积方式的多样性增大，颗粒滑动的摩擦耗能增加。
