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利用多道瞬态瑞雷波检测技术,确定了1 000 kN.m、1 600 kN.m、2 000 kN.m 3种不同夯击能的有效加固深度为4 m5、m5、.7 m;通过强夯施工应力重合范围的试验研究,得出了强夯过程中相邻夯点交叉作用的应力重合规律,确定了“大间距、两遍夯”的强夯施工方案;以加固每平方米路基所均摊的夯击能作为评价强夯施工成本的指标,优化了原有土石混填路基的强夯施工方案。
Multi-channel transient Rayleigh wave detection technology was used to determine the effective consolidation depth of 4 m5, m5, .7 m for 3 different ram impact energies of 1 000 kN.m, 1 600 kN.m and 2 000 kN.m. Through the experimental research on the coincidence range of dynamic compaction construction stress, the law of stress coincidence of adjacent rammer points in dynamic compaction process was obtained, and the compaction construction scheme of “large spacing and twice over ramming” was established. The average tamping of square meters of roadbed can be used as an index to evaluate the construction cost of dynamic compaction, optimizing the dynamic compaction construction scheme of the original soil mixed roadbed.