United States Department of Transportation
i
Nondestructive Testing for Quality Assurance & Quality Control of Drilled Shafts at Departments of Transportation
-
2004-05-01
[PDF-412.58 KB]
Details:
-
Creators:
-
Corporate Creators:
-
Contributors:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Contracting Officer:
-
Corporate Publisher:
-
Abstract:Most State Departments of Transportation (DOTs) routinely use nondestructive testing (NDT) to evaluate the constructed quality of drilled shafts. The primary objective of this study was to determine the state of practice for drilled shaft NDT among State DOTs. This objective was accomplished by conducting a survey of all State DOTs. A literature search was also conducted to determine the past, present, and future direction of NDT of drilled shafts. Common NDT methods and test procedures for drilled shafts were reviewed. The study indicated that the use of NDT for QA/QC of drilled shaft foundations is a widely accepted practice worldwide. The four techniques commonly used to evaluate the integrity of drilled shaft foundations are sonic echo, impulse response, cross-hole sonic logging, and gamma-gamma logging. Significant findings of interest include a lack of understanding of the interplay of NDT design and mitigation, the prevalence of cross-hole sonic logging, and the reason for selecting the NDT method. Almost all State DOTs indicated that they would be interested in learning more about NDT methods for QA/QC of drilled shafts.
-
Format:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
