To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
Languages
Recent
Show all languages
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

Crosshole sonic logging

From Wikipedia, the free encyclopedia

Crosshole sonic logging (CSL) is a method to determine the structural integrity of drilled shafts and other concrete piles.

The CSL method is considered to be more accurate than sonic echo testing in the determination of structural soundness of concrete within the drilled shaft inside of the rebar cage. This method provides little indication of concrete soundness outside the cage.

Also known as Crosshole Acoustical Testing, CSL normally requires steel (preferred) or PVC access tubes installed in the drilled shaft and tied to the rebar cage. Before the rebar cage is placed in the hole, the CSL access tubes are attached to the interior of the rebar cage. The cage is then lowered into the hole and the concrete is placed. Steel CSL tubes are preferred over PVC tubes because studies have shown that PVC tubes tend to debond from the concrete due to the heat of hydration process of concrete, resulting in erratic CSL test results.[1][2]

The tubes are filled with water as an intermediate medium. After curing for 3–7 days, a sound source and receiver are lowered, maintaining a consistent elevation between source and sensor. A signal generator generates a sonic pulse from the emitter which is recorded by the sensor. Relative energy, waveform and differential time are recorded, and logged. This procedure is repeated at regular intervals throughout the pile and then mapped. By comparing the graphs from the various combinations of access tubes, a qualitative idea of the structural soundness of the concrete throughout the pile can be gleaned.

A more advanced, higher-end analysis that creates a mock 3-dimensional graphical display of the concrete soundness throughout the pile is known as Crosshole Sonic Tomography.

YouTube Encyclopedic

  • 1/3
    Views:
    11 734
    15 520
    10 698
  • PDI-Cross Hole Sonic Logging ISO WEB.wmv
  • Sonic logging and wave types
  • Acoustic sonic log

Transcription

See also

References

  1. ^ Hadjuk, Edward L.; Ledford, D.L.; Christopher, W.R. (2004). "PVC and Steel Access Tube Debonding during Sonic Logging Testing for the SC 170 Bridge Replacement Project". Proceedings of the Deep Foundation Institute 2004 Annual Conference, Vancouver, BC.
  2. ^ Schmauder, Gretchen; Steve D. Bowman; Thomas J. Adams (2006). "CROSSHOLE SONIC LOGGING: INSIGHTS ON TESTING NEVADA  INFRASTRUCTUR" (PDF). Archived from the original (PDF) on 2011-08-10. Cite journal requires |journal= (help)
  • Farouz, E., Landers, P., Webster, S., November, 2005. Case History: Foundation Evacuation for the Virginia Highway 288 Project. GEO3 Construction Quality Assurance/Quality Control Technical Conference: Dallas/Ft. Worth, TX; 49-60.
  • Beim, J.W., Debas, L.F., Kormann, A.C.M., Martinati, L.R., Neto, L.A., November, 2005. Tomography: A New Technology for Quality Control of Deep Foundations. GEO3 Construction Quality Assurance/Quality Control Technical Conference: Dallas/Ft. Worth, TX; 323-328.
  • ASTM D6760 - 14 Standard Test Method for Integrity Testing of Concrete Deep Foundations by Ultrasonic Crosshole Testing, doi:10.1520/D6760-14
  • ASTM D4428 / D4428M - 07 Standard Test Methods for Crosshole Seismic Testing, doi:10.1520/D4428_D4428M-07

External links

This page was last edited on 12 December 2020, at 16:04
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.