综合物探在高速公路路基密实度检测中的应用

APPLICATION OF INTEGRATED GEOPHYSICAL METHODS ON THE CHECKING OF DENSITY OF ROADBED

在高速公路路基检测中,密实度是衡量路基质量的重要指标。本文在洛阳至三门峡高速公路建设中,采用瞬态瑞雷面波及地质雷达两种物探方法综合进行现场质量监控试验,经与灌沙法取样验证分析比较,表明瑞雷面波法在检测路基碾压密实度方面效果较好。而地质雷达能定性检测路基碾压质量,它检测周期短、效率高、成本低,可进行大范围、全程性路基检测。两种物探方法综合应用是高速公路建设中进行现场质量监控的有效途径。

During the checking of roadbed of highway, density is an important scale to determine the quality of roadbed. This paper gives a case about the integrated application of two methods, Rayleigh method and Ground Penetrating Radar（GPR）, to monitor the quality of the highway from Luoyang to Sanmenxia during the process of constructing. After comparing with the sample validation of sand replacement method, result shows that the Rayleigh has good effect on the checking of density of roadbed. And GPR can qualitatively check the grinding quality of roadbed, because it has some characteristics, such as short checking time, high efficiency and low cost. So the GPR can be used on a large scale, and it also can be used on the full process checking of roadbed. The Integrated application of these two methods is an effective approach to monitor the quality of engineering during the constructing process of highway.