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为了研究强夯加固泥质粉砂岩填土地基过程中掺入凝灰岩块石对地基加固效果的影响,在4块25m×25m的试验区上进行了泥质粉砂岩和凝灰岩开山块石体积比分别为1∶0、1∶0.5、1∶1和1∶2配比的填土地基强夯现场试验研究,通过现场的夯沉量、载荷试验、波速试验的检测结果对强夯加固效果作出了评价。试验结果表明:采用1∶1配比的填土地基经强夯加固后不仅承载力和变形满足设计要求,而且工程时效性强,故适当控制泥质粉砂岩中块石的比例,强夯后能够提高地基承载力、变形模量及密实度。
In order to study the effect of consolidation of tuff rock mass on the reinforcement effect of foundation during the process of dynamic compaction of muddy silt fill, the volume ratio of rock mass of muddy siltstone to tuff rock was measured in four 25m × 25m experimental areas 1:01:0.5, 1: 1 and 1: 2 ratio of filling dynamic compaction test in the field, through the scene of the amount of settlement, load test, wave velocity test results of dynamic compaction reinforcement effect made Evaluation. The test results show that: The 1: 1 ratio of the filled foundation after the compaction of the dynamic compaction not only to meet the design requirements and bearing capacity and deformation, and timeliness of the project, it is appropriate to control the proportion of blocks of muddy siltstone, Can improve the foundation bearing capacity, deformation modulus and density.