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文章以国道主干线天谗公路为依托,通过室内常规土试验和土样显微结构分析,研究了路基土冲击压实性能,结果表明:对该试验区冲压16遍加固效果是最好的;冲压16遍后,路基土结构从粒状架空结构转变为粒状镶嵌结构为主,孔径从冲压16遍前的0.0692μm降低到0.0626μm,定性分析结果和定量分析结果相吻合;冲压16遍后,路基土体湿陷界限在120～135cm;考虑随时间路基土体压实度有一定量增加,冲压加固深度内压实可满足设计要求。
Based on the national trunk road Tianzhu Highway, this paper studies the impact compaction performance of subgrade soil by the conventional soil test and the microstructure analysis of soil samples. The results show that the reinforcement effect of punching 16 times is the best. After 16 times of punching, the subgrade structure changed from granular overhead structure to granular inlay structure, the aperture decreased from 0.0692μm to 0.0626μm before stamping 16 times, and the qualitative analysis results were consistent with the quantitative analysis results. After 16 times of punching, The limit of soil collapses is in the range of 120 ~ 135cm. Considering the compaction degree of subgrade soils increases with time, the compaction depth can satisfy the design requirements.