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A proposed improved CSL rating criteria

A proposed improved CSL rating criteria

A task force of industry experts was formed to review the existing CSL rating criteria and propose improvements where appropriate. The recommendations were presented in a document that presents the consensus of the task force and which suggests it will be incorporated into future criteria, codes, and specifications.

Piletest already implemented the criteria into the CHUM software by the form of a “classification bar”. Once enabled, a colored bar appears at the left of each profile and clearly shows the classification at that point.
In addition, hovering the mouse pointer over the profile shows the location of the pulse within the classification “map”.

CHUM classification bar

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Pile Testing — Anomalies, Flaws and Defects

Pile Testing — Anomalies, Flaws and Defects

A new in DFI Magazine /May-June-2019 by Dr. Joram M. Amir

…Based on the technical paper by Amir, “Single-Tube Ultrasonic Testing of Pile Integrity,” which was published in the proceedings of the ASCE 2002 Deep Foundation Congress, the following definitions are intended to make a clear distinction between the results of the integrity tests, the physical condition of the pile and the necessary action, if any. The terms were incorporated in ASTM D6760 and can also be visualized using a Venn
diagram in which they can be depicted and distinguished.

ream more



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New ASTM standard for inclination – Piletest is the technical contact

ASTM standard D8232-18  was just released!

Standard Test Procedures for Measuring the Inclination of Deep Foundations

Dr. Joram M. Amir, chairman and founder of Piletest was the technical contact and the driving force behind this effort.

The new standard backs and supports the test method and procedure performed by our BIT (which fully complies with it)

Read the full standard in ASTM web 

 

Check our “Inclination” watch-list in our YouTube channel

Get the BIT

 

 

 

 

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CHUM – 3D animation movie

CHUM – 3D animation movie

A new animated movie introducing the CHUM just added to our YouTube channel

We think it is an effective and very clear way to show the product

More about CHUM in the product page

Posted by admin in CHUM, Crosshole Ultrasonic Logging, Pile Testing, 0 comments

Pile P20 – A Case History

 

Pile P20 – A Case History

supported by 3D tomography and verified by coring

Erez I Amir. Piletest

 

Background

Pile P20 is part of a sensitive project so just a few details can be disclosed at this stage.

The pile is ACIP (augered-cast-in-place) 1m diameter and 14m long

The pile was pre-installed with 4 CSL access tubes and was tested more than 5 days after casting.

CSL Test Results

CSL (Cross-Hole Logging) was performed using CHUM (Cross Hole Ultrasonic Monitor) manufactured piletest.com

Testing revealed a significant relative energy (RE) decrease and a matching first arrival time (FAT) increase in profiles 13 and 23, and to a lesser degree also in profile 12 (Images 1, 2)

Image1
CSL results – showing an anomaly at all profiles at the same level

Image 2

A zoom into the anomaly zone, profile 23.

The bars on the left indicate that at 10m both FAT is increased by > 20% and RE decreased by > 12dB

 

Although the data was tested by 1D CSL and the pile was equipped with just 3 access tubes, a 3D tomography was attempted and reveals the location of the flaw (image 3)

Image 3

A 3D tomography view of the anomaly at 10m, showing velocities lower than 2750m/Sec, higher velocities are transparent

 

Coring

Following the CSL results, the inspector ordered coring of the pile which confirmed the CSL results (Image 4) – The concrete at 10m was totally washed-out leaving just aggregates.

Image 4

Cores showing the defect

 

Conclusions

  1. CSL is a viable test method with few false-positives
  2. Interpretation is usually straightforward
  3. 3D tomography supports tough decisions regarding anomalies.

 

Thanks

As this project is undergoing litigations, we thank the anonymous testing lab for sharing this information with us.

 

Posted by admin in CHUM, Crosshole Ultrasonic Logging, Pile Testing, 0 comments
CHUM CSL Picture in Bangladesh.

CHUM CSL Picture in Bangladesh.

We liked this surreal and colorful picture showing CHUM CSL testing so much we just had to share it with you 🙂

By the way – just by looking at the size of the cable heap you can guess how massive this pile is…

— Picture credit to MD. SHAMSUL ISLAM from Prosoil, Bangladesh

 

Posted by admin in CHUM, Crosshole Ultrasonic Logging, Pile Testing, 1 comment

BIT – Measuring verticality in CSL access tubes

Every standard specifies the permitted deviation from the vertical – and for a good reason.
But until now, there was not practical way to measure it
The new YouTube animations below explains it perfectly

Contact us for details

Posted by admin in Inclination Testing, Pile Testing, 0 comments
“Fly” into a defected pile

“Fly” into a defected pile

A 3D “flight” into a defected pile to visualize all the hidden defects
Data logged by the CHUM – CrossHole Ultrasonic Monitor

 

 

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