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Drilled Shaft Instrumentation and
Lateral Load Testing
Ironton-Russell Bridge over the Ohio
River
ODOT OGE Workshop
Jamal Nusairat, Ph.D., P.E.
May 7, 2013
Presentation Outline
• ODOT Research on Rock Socketed
Drilled Shafts
• Lateral Load Test Special Provision
• Instrumentation and Testing
• Lateral Load Test Results
Ohio Bedrock – Map of Testing
Calcareous
Shales
Non-
Calcareous
Shales
Limestone
and Dolomite
Shales and
Sandstone
Red
Shales
= Test Completed
= Proposed
LEGEND
= Pressuremeter
The bedrock map is from the ODNR website
A New Correlation for Em based on GSI Classification ODOT SJN 134137: Design of Rock Socketed Drilled Shafts
A new correlation based on GSI rock classification system was proposed using data from Nicholson and Bieniawski (1990) and Ironton-Russell test data
Em=Ei exp(GSI/21.7) / 100
Proposed Em Correlation Based on GSI Classification
0.0
20.0
40.0
60.0
80.0
100.0
0 20 40 60 80 100
GSI
Em
/Ei (
%)
Bieniawski (1978)
Serafin and Pereira (1983)
Ironton-Russell
Regression
Em/Ei=exp(GSI/21.7)/100
Lateral Load Test Submittal
Test Planning and Preparation
Test Planning and Preparation
Test Planning and Preparation
Subsurface Profile Subsurface Profile
Rock Coring
Boring B-7 rock core run 1 and 2.
Subsurface Profile Pressuremeter Testing
Subsurface Profile Pressuremeter Testing
Subsurface Profile Pressuremeter Testing
Subsurface Profile Pressuremeter Testing
c
p
v
1vv12
b
m0
RRE
Interpreting Dilatometer Test Data
Dilatometer Test Results
Unconfined Compressive Strength Test Results
Testing Summary
Comparison of Dilatometer Modulus Vs. Unconfined Compression Modulus
Average dilatometer modulus, Emass = 569 ksi
Average unconfined compressive strength modulus, Ecore = 1,670 ksi
Modulus reduction ratio, Emass/Ecore = 0.34
For RQDavg = 84%, the modulus reduction ratio compares favorably with Bieniawski (1984)
Test Shaft 1 Proof Cores
Type of
Instrument
Sister
Bar
(each)
Load
Cell
(each)
Inclinomet
er Tube
(ft.)
Tiltmete
r
Survey
Prisms
Dial
Gages
Test Shaft #
1
26 ft. Deep
Socket
22 1 75 1 4 1
Test Shaft #
2
18 ft. Deep
Socket
22 65 1 4 1
Total
Quantity 44 1 140 2 8 2
Instrumentation used for lateral load test
Test Shafts Instrumentation
Test Planning and Preparation
Test Planning and Preparation
Test Planning and Preparation
Test Planning and Preparation
Test Planning and Preparation
Test Results - Deflection
Test Results - Deflection
T.S. # 1 T.S. # 2
Test Results - Deflection
Test Results - Deflection
Test Results – Tilt Angle
Layer
No.
Top
Elev.
(ft.)
Bottom
Elev.
(ft.)
Unit
Wt.
(pcf)
Elasticity
Modulus
(psi)
Uniaxial
Compressive
Strength
(psi)
RQD
(%)
Notes
1 473 469 140 10000 6400 97 Weathered
Sandstone
2 469 457 140 120000 9000 100 Unweathered
Sandstone
3 457 450 135 5000 250 75 Coal/claystone
4 450 ? 140 120000 9000 100 Unweathered Sandstone
Selected Parameters to Match the Deflection from Lateral Load Test
LPILE Results