高液限红黏土回弹模量试验

Resilent Modulus Test of High Liquid Red Clay

土基回弹模量是路面结构设计中一个非常重要的参数,直接关系到路面结构的安全性和经济性。采用室内承载板法分析了高液限红黏土回弹模量与压实度、含水率、稠度和压实度、龄期以及最不利条件下回弹模量与压实度关系。结果表明回弹模量与含水率关系可以用幂函数E=Aw-n形式拟合;回弹模量随压实度的增大而增大;回弹模量与压实度和稠度指标具有良好的相关关系,不同地区不同土质其回归关系是不相同的;回弹模量随着龄期的增长有一定提高。同一压实度时,最不利条件下与最佳含水率条件下高液限红黏土回弹模量的相关关系为:E最不利条件=0.461 5E最佳含水率条件+21.041,R2=0.996 1。

The soil resilent modulus is an important parameter of the pavement structure design. It is influenced directly on the safety and economy of the pavement structure. Using indoor loading plate, the relation between resilent modulus and compaction degree, water content, consistency and compaction are analyzed. The relation between resilent modulus and compaction is also studied under the worst unfavourable condition. The results show that the relation between resilent modulus and water content can be ex- pressed with the power E = Aw^-n. The resilent modulus increases when the compaction degree is advanced. The resilent modulus increases in a way with the time＇s extend. The relation between resilent modulus of the worst unfavourable condition and resilent modulus of the optimum water content can be expressed with formula Eworst unfavourable condition=0. 461 5Eoptimun water content＋21.041,R^2 =0. 996 1.