用压实度计算路基力学性能的研究

文章基于CBR值与路基回弹模量的关系，针对工程实践中土基回弹模量的测定较为困难，受外界因素影响大，传统用测定路基土体的加州承载比（CBR）来推算土基回弹模量的方法也较耗时且效率较低的现状。通过对实际工程数据的分析，探索了利用路基压实度来计算路基力学性能的方法。结果表明：对于自然条件相近的地区，CBR同土基回弹模量的关系在一个相对较大的范围内是比较稳定的。通过建立路基压实度同CBR值之间的关系模型，间接推出压实度与土基回弹模量的关系是可行并且容易做到的。在不能测量土基回弹模量时，可以利用路基压实度这种施工中较容易获得的路基参数来估算路基的回弹模量。

Calculation of subgrade mechanical properties by degree of compaction

Based on the relationship between CBR value and subgrade resilient modulus,the difficulty in measuring engineering practice of soil resilient modulus, time-consuming and low efficiency of calculating the subgrade resilient modulus by the traditional subgrade California bearing ratio（ CBR）, through the analysis of the actual engineering data, the paper explores the methods of roadbed compaction degree to calculate the subgrade mechanical properties. The results show that, in the regions with similar natural conditions, the relationship between CBR and the subgrade resilient modulus is relatively stable in a relatively large range. Through the establishment of the roadbed compaction degree relation model between the same value, indirect launched relationship between degree of compaction and the subgrade resilient modulus is feasible and easy to do. Therefore, the resilience modulus of subgrade parameters can be easily obtained by this construction of subgrade compactness when the modulus of resilience can not be measured.