Combined Pile-Raft Foundations
The “Combined Pile-Raft Foundations” program is used to analyze and design combined pile-raft foundations (CPRF) taking into account the elastic support of the raft and the pile-pile and pile-raft interactions. Alternatively, pile groups can be analyzed using a load-distributing head plate. Taking into account the load transfer via the plate, the load is distributed to the piles and the required pile length is determined.
Only available in FRILO Geotechnic Professional und FRILO Geotechnic Ultimate
Performance characteristics
Material
- Reinforced concrete with selectable concrete and steel grades
Structural system
- Rectangular, circular, or polygonal plate
- Selectable pile types: bored piles, displacement piles (driven piles) and micro piles (grouted piles)
- As compression piles or tension piles
- Vertical or with an inclination
- Pile group with a load-distributing head plate without elastic support, the pile-pile and pile-plate interactions are not considered
- Combined pile-raft foundation (CPRF) with consideration of the pile-pile and pile-raft interactions
Soil
- Variable soil stratification with specification of the characteristic parameters: skin friction, peak pressure and stiffness modulus for the foundation
- The characteristic values for the skin friction and the peak pressure specified by DIN 1054, ÖNORM B 1997 and the EA Recommendations are available for cohesive and non-cohesive soils and rock
- User-defined default settings for all relevant layer parameters
- Parameter suggestions for standard soils
- Optional definition of soil stratification using individual borehole points to account for inhomogeneous layer thicknesses
- Automatic interaction of inhomogeneous layer thicknesses when multiple borehole points and their local layer profiles are known
Ground surface
- Assumption of horizontal terrain in the vicinity of the pile grate
Groundwater
- Optional specification of a constant groundwater horizon
- Automatic interaction of an inhomogeneous groundwater horizon if several borehole points and their groundwater levels are known
Loads
- Multiple load cases with vertical and horizontal concentrated loads and line loads as well as concentrated moments and line moments, area loads
- Automatic generation of the load case combinations with the combination coefficients psi
Vertifications
- Analysis and representation of the pile internal forces, the pile settlements incl. interactions, the soil pressure and the deformations as well as of the raft internal forces
- Analysis of the plate and the bearing effect of the piles (FEM analysis with isoparametric quadrangular elements)
- Analysis of the elastic support of the raft taking into account the bearing effect on the piles (FEM analysis with isoparametric quadrangular elements)
- Analysis of a bedded raft without piles is possible
- Analysis of the CPRF taking into account the influence of the piles on the other piles and the raft and vice versa in accordance with El Gendy, Hanisch, Kany
Reinforced concrete design
- Design of the piles and the raft, analysis of the required reinforcement and, if necessary, a punching shear analysis at the pile heads
Geotechnical vertifications
- Analysis of the load distribution on the piles and the required pile lengths
- Automatic iteration to find the state where the raft foundation and the pile settlement are in equilibrium
Output profile
- Detailed output of the individual load cases as text and graphics
- Detailed output of the required and selected reinforcement for the limit states of load-bearing capacity
- Detailed output of all relevant geotechnical verifications with utilization rates
File formats
- Printer
Export options
- RTF export to MS Word
- Graphic export in JPG format
- DXF export
Foundation engineering
- EN 1997-1
- DIN EN 1997-1
- ÖNORM B 1997-1-1
- NF EN 1997-1
- BS EN 1997-1
- UNI EN 1997-1 with NTC 2018
- UNE EN 1997-1
- DIN 1054
- DIN EN 1536
- BS 8004
- SIA 267
- ÖNORM B 4440
- Recommendation of the Pile Work Group EA-Pfähle
Reinforced concrete
- EN 1992
- DIN EN 1992
- ÖNORM B 1992
- NF EN 1992
- BS EN 1992
- UNI EN 1992
- DIN 1045
- SIA 262
- ÖNORM B 4700
- BS 8110
Steel
- EN 1993
- DIN EN 1993
- ÖNORM B 1993
- NF EN 1993
- BS EN 1993
- UNI EN 1993
- SIA 263
- BS 5950
Support resources
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