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利用风化花岗岩混合料,对潍坊市郊区深坑中高填路堤进行分层强夯填筑,通过不同夯击能下的强夯土体变形试验,确定了关键施工参数.采用压实度、载荷试验和瑞利面波等原位测试手段测定了强夯前后路基的压实程度和力学性能,显示强夯施工后填料层变形模量能普遍提高1.6—3.5倍,锤底下填料层的变形模量要大于地表夯点间的变形模量,干密度和孔隙比数值变化也反映类似规律.在填土深度5m范围内,夯后面波速度明显提高,达到240—320m/s左右,加固效果明显.建立了瑞利波波速和土基变形模量以及干密度间的表达式,达到快速检测土石混填路基压实度和评价路基整体质量与力学性能的目的.
The weathered granite mixture was used to stratify the high filling embankment in the deep pit in Weifang suburb, and the key construction parameters were determined by dynamic compaction test under different ram impact energy.The compaction degree and load test And Rayleigh wave and other in situ testing methods before and after dynamic compaction compaction degree and mechanical properties of the roadbed showed that the dynamic compaction of the packing layer deformation modulus can be generally increased 1.6-3.5 times the hammer under the deformation modulus Which is greater than the deformation modulus between the rammer point and the dry density and the void ratio also reflect a similar rule.After the depth of 5m, the wave velocity of the rammer obviously increases to about 240-320m / s, and the reinforcement effect is obvious. The Rayleigh wave velocities, expressions of deformation modulus and dry density were established to achieve the purpose of quickly detecting the compaction degree of soil-rock mixed embankment and evaluating the overall quality and mechanical properties of embankment.