A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The Application and Advantages of Surface Penetrating Radar in Subgrade Void Detection beneath Slabs-on-Grade
Settlement of subgrade resulting in poor performance of slabs-on-grade is a common problem in structures. On a recent project, significant amounts of soil slurry infiltrated the basement of a large manufacturing warehouse. The washout of the underlying soil and resulting settlement was sufficient to cause visible dynamic deflections when subjected to routine forklift traffic. These observed conditions indicated the void space beneath the slabs would be moderately deep and widespread. This paper discusses the application of surface penetrating radar (SPR) to identify the locations of subgrade voids and provides a comparison to other nondestructive test (NDT) methods. Impulse response and impact-echo can be used to locate these voids; however, these methods have inherent limitations and often require more destructive testing for confirmation of results. Due to its accuracy and ease of use, SPR is an ideal NDT method for this application.
The Application and Advantages of Surface Penetrating Radar in Subgrade Void Detection beneath Slabs-on-Grade
Settlement of subgrade resulting in poor performance of slabs-on-grade is a common problem in structures. On a recent project, significant amounts of soil slurry infiltrated the basement of a large manufacturing warehouse. The washout of the underlying soil and resulting settlement was sufficient to cause visible dynamic deflections when subjected to routine forklift traffic. These observed conditions indicated the void space beneath the slabs would be moderately deep and widespread. This paper discusses the application of surface penetrating radar (SPR) to identify the locations of subgrade voids and provides a comparison to other nondestructive test (NDT) methods. Impulse response and impact-echo can be used to locate these voids; however, these methods have inherent limitations and often require more destructive testing for confirmation of results. Due to its accuracy and ease of use, SPR is an ideal NDT method for this application.
The Application and Advantages of Surface Penetrating Radar in Subgrade Void Detection beneath Slabs-on-Grade
Norvell, Justin (author) / Grill, John (author)
Fifth Forensic Engineering Congress ; 2009 ; Washington, D.C., United States
Forensic Engineering 2009 ; 647-656
2009-11-02
Conference paper
Electronic Resource
English
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