砂砾卵石土压实参数的试验研究

砂砾卵石土作为一种特殊的路基填料,其工程特性、施工工艺、质量检验与控制方面与常规的土质路基甚至土石混合路基有较大的区别。采用不同的现场试验方法分别对某高速公路砂砾卵石土路基填料虚铺厚度为30 cm和40 cm时,采用灌砂法、沉降差法、DCP贯入度法检测其压实度。结果表明,对于砂砾卵石土路基填料,当碾压遍数为4遍时,3种方法计算的压实度均满足设计要求。

Test study on sand gravel cobble soil compaction parameters

Sand gravel cobble soil is a special subgrade filler. Its engineering properties, construction technology, quality inspection and control are different from those of conventional soil subgrade and rock mixture foundation. Based on different field tests such as sand cone method, differential settlement method and DCP method, it studies the relationship between the times of rolling and compactness when the virtual height of a highway sand gravel and cobble is 30 cm and 40 cm respectively. The results show that when the times of rolling is 4 for sand gravel cobble soil, the calculated compactness for different methods all satisfy the design requirements.