Defects in Drilled Shaft Foundations: Identification, Imaging, and Characterization

Jalinoos, Frank; Mekic, Natasa; Grimm, Robert E.; Hanna, Kanaan; United States. Federal Highway Administration. Central Federal Lands Highway Division

Advanced Search

Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Defects in Drilled Shaft Foundations: Identification, Imaging, and Characterization

2005-03-01
By Jalinoos, Frank ; Mekic, Natasa ; Grimm, Robert E. ; ...

[PDF-13.48 MB]

Select the Download button to view the document

This document is over 5mb in size and cannot be previewed

English

Details You May Also Like

Details:

Creators:

Jalinoos, Frank ; Mekic, Natasa ; Grimm, Robert E. ; Hanna, Kanaan

Jalinoos, Frank ; Mekic, Natasa ; Grimm, Robert E. ; Hanna, Kanaan Less -
Corporate Creators:

United States. Federal Highway Administration. Central Federal Lands Highway Division
Contributors:

Haramy, Khamis Y. ; Anderson, Scott ; Surdahl, R.

Haramy, Khamis Y. ; Anderson, Scott ; Surdahl, R. Less -
Subject/TRT Terms:

[+]

Concrete Concrete Strength Crosshole Sonic Logging (CSL) Defects Drilled Shaft Foundations Engineering Properties Of Concrete Foundation Engineering Gamma- Gamma Density Logging Integrity Testing Logging (Recording) Maturity Nondestructive Testing (NDT) Nondestructive Tests Strength Of Materials Temperature Measurement Temperature Monitoring Testing Tomography
Publication/ Report Number:

FHWA-CFL/TD-05-003
Resource Type:

Tech Report
Geographical Coverage:

United States
Contracting Officer:

Haramy, Khamis
Corporate Publisher:

United States. Federal Highway Administration. Central Federal Lands Highway Division
Abstract:

This report addresses two key issues needed by the foundation engineer to assess the structural integrity of drilled shaft, or other concrete structures that contain access tubes; specifically: a) What constitutes a defect in a drilled shaft?; and, b) How to relate observed defect in a velocity tomogram to engineering strength information? This study was conducted based on the development of a three-step approach: 1) Anomaly Identification and Independent Verification - This step allows the engineer to identify and independently verify suspected “anomalies” in drilled shafts. It is concluded that both crosshole sonic logging (CSL) and gamma-gamma density logging (GDL) must be used. For velocity imaging of the shaft’s interior, three-dimensional crosshole sonic logging tomography (CSLT) is required. 2) Defect Definition – A statistical approach is presented to define a cut-off velocity to separate CSLT velocity distribution of sound concrete from the velocity distribution of anomalous concrete. The cut-off velocity is then used to volumetrically image a “defect” volume. 3) Defect Characterization – Finally, changes in velocity values in the defect volume is correlated to changes in concrete strength and a 3-D strength image is developed for integrity assessment by the engineer. The velocity-strength correlation is developed in the laboratory using cylinders with the same design mix as the shaft and allowing for maturity. Therefore, this study proposes a complete analysis and technical information to assist the foundation engineer and owner agencies in deciding to accept, remediate, or reject a given shaft or a wall structure.
Content Notes:

COTR: Khamis Haramy, FHWA-CFLHD. Advisory Panel: Scott Anderson, FHWA-FLH and Roger Surdahl FHWACFLHD. This project was funded under the Federal Lands Highway Technology Deployment Initiatives and Partnership Program (TDIPP.)
Format:

PDF
Funding:

DTFH68-03-P-00116
Collection(s):

Federal Highway Administration
Main Document Checksum:

[+]

urn:sha256:47bbf60d1aaa44b558aae5850ec2f5a353bb25ce4aaf26e0d43f7356dcbcdd5f
Download URL:

https://rosap.ntl.bts.gov/view/dot/50276/dot_50276_DS1.pdf
File Type:

No Additional Files

More +

Defects in Drilled Shaft Foundations: Identification, Imaging, and Characterization

Details:

Supporting Files

You May Also Like