公路路基评价的关键技术问题研究

Evaluating the Key Technological Problems of the Highway Subgrade

针对公路路基密实度和强度快速检测的迫切需求,利用常规灌水和烘干法检测对快速无损检测(附加质量法和核子密度仪法)进行了验证,证明了无损检测的可行性,无损检测方法具有操作简单、检测速度快捷等优点;通过试验参数的相关性分析,获得了干密度与变形模量和承载力特征值的线性关系,其回归方程分别为E=512.76ρd-527.16、R2=0.8704;frk=402.85ρd-374.54、R2=0.7692.

For a typical project of highway subgrade compaction degree and bearing capacity,performances of routine test and non destructive testing were compared in experimental points.The results show：non destructive testing is fast and nondestructive for tested coarse material,etc.,the additive mass method is one of the most prospective nondestructive methods;The linear interrelation between the dry density and modulus of deformation is about 0.8704、regression equation E=512.76ρd-527.16;The linear interrelation between the dry density and bearing capacity is about 0.7692、regression equation frk=402.85ρd-374.54.