级配碎石散体材料极限二次松散系数应用研究

Research on Limit Coefficient of Secondary Looseness of Discrete Material of Graded Gravel

基于级配碎石的松散性,提出极限二次松散系数的概念和试验方法,并研究了极限二次松散系数的影响因素,然后利用极限二次松散系数推导得出了碎石松散区域的边界方程,利用边界方程计算了不同路基最大沉降量下完全缓冲路基差异沉降时所需的级配碎石层理论最小厚度,可为道路结构设计和施工提供理论基础。

The concept of limit coefficient of secondary looseness and test method were proposed based on the looseness of graded gravel,and the impact factors were studied.The coefficient was used to deduce the boundary equation of the loose area of gravel,which would be applied to calculate the minimum thickness of graded gravel layer required to offset the settlement difference of subgrade,which provides reference for road structure design and construction.