Shaft Acceptance
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Shaft Acceptance WSDOT’s Perspective PowerPoint PPT Presentation


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Shaft Acceptance WSDOT’s Perspective. Mohammad Sheikhizadeh HQ Construction. Cross Sonic Log (CSL). Cross Sonic Log (CSL) Test. CSL Sensor. Types of Anomalies. Anomalies in the Perimeter of Shaft No Concrete Cover Anomalies in the Center of Shaft Soft Bottom

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Shaft Acceptance WSDOT’s Perspective

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Shaft acceptance wsdot s perspective

Shaft Acceptance

WSDOT’s Perspective

Mohammad Sheikhizadeh

HQ Construction


Shaft acceptance wsdot s perspective

Cross Sonic Log (CSL)


Shaft acceptance wsdot s perspective

Cross Sonic Log (CSL) Test


Shaft acceptance wsdot s perspective

CSL Sensor


Shaft acceptance wsdot s perspective

Types of Anomalies

  • Anomalies in the Perimeter of Shaft

  • No Concrete Cover

  • Anomalies in the Center of Shaft

  • Soft Bottom

  • Poor Concrete in The Top of Shaft


Further investigation

Further Investigation

  • The Contractor Proposes Additional

  • Exploratory Measures

  • The Engineer Approves or Suggests an

  • Alternate Proposal


Wsdot evaluation

WSDOT Evaluation

  • Review Boring Logs

  • Geotechnical Engineer’s Input

  • Review Inspector’s Field Notes/Input

  • Review Mix design, Slump, Cylinder

  • Breaks

  • Structural Analysis/Acceptance


Shaft acceptance wsdot s perspective

Shaft Design


Additional csl test

Additional CSL Test


Defect in the middle

Defect in the Middle


Shaft acceptance wsdot s perspective

8’ Diam. Shaft With 4’ Hollow Core

8’

6% Loss in Flexural Capacity


Perimeter defect

Perimeter Defect


Concrete cover

Concrete Cover


Defect at top of shaft

Defect at Top of Shaft


Soft bottom

Soft Bottom


Shaft acceptance wsdot s perspective

Tip Pressure Grouting

Pressure Grout

2” diam. Core

CSL Tubes May Be Used

For Grouting


Shaft rebar cage

Shaft Rebar Cage


Shaft acceptance wsdot s perspective

Concluding Remarks

  • CSL Tests & Results Are Accurate &

  • Dependable Provided:

  • Tests Performed by Skilled Testers

  • Correct Interpretations Are Made


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