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1 Power Line Systems, Inc. 6/18/2019
CAISSON
Kevin Brzys
Power Line Systems
2019 PLS‐CADD Advanced Training and User Group
by
IT’S ALL ABOUT YOUR POWER LINES Power Line Systems
IT’S THE SOLUTION
Introduction
• What is CAISSON
– Analysis & Design Assumptions
– Example
• CAISSON in PLS-POLE
– How CAISSON works in PLS-POLE
– Examples
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What is CAISSON
• CAISSON is a PLS Application suited for the analysis and design of
moment resisting concrete pier foundations and direct embedded poles.
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Product Info Page
https://www.powerlinesystems.com/caisson
Design Method used in CAISSON
• “Analysis and Design of Laterally Loaded Piles and Caissons in a layered soil system”
• Multi-layered adaption of Broms Method.
• The failure occurs because the ultimate resistance of the soil is exceeded.
– At ultimate loads the foundation does not fail.
– Failure takes place when the pile rotates as a unit around a point located below the ground
surface.
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Foundation Design & Analysis Inputs
• Project Information
• Foundation parameters – Caisson or direct embedded pole
– Foundation geometry and design parameters
– Foundation material properties
– Calculation Options
• Soil input parameters for each layer – Soil Type
– Thickness of layer
– Density of dry or submerged soils
– Undrained shear strength for cohesive soils
– Coefficients of internal friction for non-cohesive soils
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Design & Analysis – Load Cases
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• Multiple Load Cases – Loads applied to top of foundation for Caisson
– Loads applied at ground line for direct embedded pole
– Soil Strength Factor
Analysis Results
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CAISSON Updates
• Starting in version 15.30
– Multiple Load Cases
– Analysis Vs. Design
– Soil Strength Factor
– Bearing Capacity
– Improved Graphics
– See the video located
https://www.youtube.com/watch?v=Dh2AoH1CQy0&t=1s
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CAISSON Integrated in PLS-POLE
Starting in version 15.50
CAISSON has been
integrated within PLS-POLE
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– See the video located
https://www.youtube.com/watch?v=UYgU2SHCQOA&t=2s
CAISSON Foundation Inputs in PLS-POLE
• Geometry/Miscellaneous/Foundation Strength...
– Nominal Capacities
– Foundation Parameters • CAISSON Design & Analysis
• Yes or No to enable CAISSON
• Inputs for foundation diameter, pier revel, embedment, rebar
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CAISSON Soil Layer Inputs in PLS-POLE
• Geometry/Miscellaneous/Soil and
Caisson Settings...
– Geometry for foundation if in design
mode
– Foundation Materials
– Calculation Options
– Soil input parameters for each layer
– Loads are taken from PLS-POLE
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Analysis Results
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CAISSON Example
• Design a foundation within CAISSON
– Steel pole spoex12.pol from PLS-POLE examples
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CAISSON in POLE Example
• Design foundations within PLS-POLE
– Caisson for steel pole spoex12.pol from
PLS-POLE examples
– Direct embed wood pole wpoex9.pol from
PLS-POLE examples
Power Line Systems, Inc. 14
Contact Information
PLS-CADD
End
®
FAC 008/009
Drafting
FAC 003
NERC Ratings
Structural Analysis
PLS-POLE Joint Use
Advanced Sag & Tension LiDAR Modeling
Line Ratings TOWER
Pole Analysis
Vegetation Management
Materials Management
Line
Optimization
1000+ Users in 100+ Countries Storm Hardening
Project Estimating
ASCE
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IEEE
IEC
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Distribution
Transmission
15 Power Line Systems, Inc. 6/18/2019
IT’S ALL ABOUT YOUR POWER LINES Power Line Systems
IT’S THE SOLUTION
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