土石混填路基动态回弹模量与压实度的关系

Relationship between dynamic resilient modulus and compaction degree of soil-rock embankment

动态回弹模量作为一种路基强度指标,可以真实地反映路基动态特性。通过测试相同碾压条件下路基的动态回弹模量与压实度,并对其进行回归分析,建立了动态回弹模量与压实度的关系模型,研究了动态回弹模量与压实度之间的相互关系。最后应用所得模型对现场质量检测进行控制。结果表明:4d检验法与格拉布斯检验法处理后,所选材料动态回弹模量与压实度的关系模型可用对数回归模型表示。采用动态回弹模量检测技术,可以较好地实现路基压实度的无损检测。

Dynamic resilient modulus is a strength index,it can reflect dynamic characteristic of subgrade.This research gathers the test data of dynamic resilient modulus and compaction degree of same construction conditions,then get an empirical equation of the relationship between dynamic resilient modulus and compaction degree by means of the regression analysis,then a relationship of dynamic resilient modulus and degree of compaction in soil-rock embankment is studied according to a large numbers of simulation tests.Finally using the relation equation controls fieldwork quality testing.The result of tests shows the model of loglinear can reflect the relationship between dynamic resilient modulus and compaction degree though 4d and Grubbs method test.The compactness of subgrade can be evaluated nondestructively by using the dynamic resilient modulus testing technique.