基于EVD的一种高速公路路基压实度快速检测方法研究

Study on a fast detection method for compactness of highway subgrade based on EVD

路基的压实质量直接决定路基承载能力和抗变形能力,也同时影响道路的服务水平和使用寿命。传统的路基压实度采用环刀法、灌砂法、灌水法等,其操作复杂、投入人力多、测试时间长。本文将便携式动态变形模量测试仪(LFGpro)测得的动态变形模量(EVD)与压实度(K)之间建立相关关系,从而快速、高效的得到路基的压实度。本文分别建立了黄土(低液限粉土ML)、红砂岩(黏土质砂)、红泥岩(高液限黏土CH)路基EVD与K之间的相关关系,相关性良好。

The compacting quality of subgrade directly determines the bearing capacity and anti deformability of subgrade, and also affects the service level and service life of the road. The traditional subgrade compaction by cutting ring, sand filling method, irrigation method, the complex operation, human resources and more, long test time. In this paper, the relationship between dynamic deformation modulus（EVD） measured by portable dynamic deformation modulus tester（LFGpro） and compaction degree（K） is established, so as to get the compaction degree of subgrade quickly and efficiently. In this paper, the correlation between EVD and K of loess（low liquid limit silt ML）, red sandstone（clay sand） and red mudstone（high liquid limit clay CH） is established, and the correlation coefficient is good.