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CADS Bearing Pile Designer

CADS Bearing Pile Designer helps engineers to investigate the effects of soil parameters and different pile types and finally select a suitablle pile type for known soil strata.

 

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Summary

  • Bearing pile capacity checks
  • Individual and groups of pile
  • Calculate pile length
  • Various analysis options
  • Specify soil layers and water table
  • Graphical and tabular output
  • Comprehensive printouts

Description

A simple program for checking the bearing capacity of individual piles and groups of piles of various lengths and types, including Bored piles, Continuous Flight Auger (CFA) piles, Driven cast in place, driven tubular steel, driven steel H piles and Driven precast piles.

A “Pile Length Calculator” can also be used to calculate the required length of pile for a given diameter/section size and required compression and tension capacity.

Analysis Options

  1. The analysis options Dialog showing the Factors of Safety tab.
  2. Carry out ultimate limit state type calculations.
  3. The theoretical unit shaft and end bearing resistances calculated using the program can be checked against maximum limit values specified in the Capacity Limits tab.
  4. The software automatically generates many of the necessary design coefficients from values given in standard texts.
  5. skin friction tab.

Soils
Multiple soil layers and the water table can be input at defined levels, each soil layer can be specified as:

  1. Granular Phi ­ - Granular soils with shear strength based on Phi values (angle of internal friction)
  2. Granular SPT ­ - Granular soils with shear strength based on SPT values (standard penetration test)
  3. Undrained ­ - Cohesive soils with shear strength based on cohesion alone
  4. Drained ­ - Cohesive soils with both cohesion and phi values defined
  5. Chalk ­ - Special class with the strength defined by SPT values

Graphical Output
The graphical output displays the variation of pile capacities with depth for ultimate shaft resistance, end bearing resistance and design compression/tension resistance.

Tabular Output
Results can also be viewed in a table which details values at 0.25m intervals unless otherwise specified by the user. These values include vertical overburden and water pressure, the effective vertical stress, the internal friction angle (Phi), cohesion, SPT and pile capacity values.

Group Analysis
Pile groups of 2 to 9 piles plus an “infinite” option can be prescribed along with the minimum pile spacing to calculate the overall group capacity. The load resistance calculation of the group follows similar calculation methods to those used for single pile analysis. An additional check for soil weight resistance is included. The perimeter and base areas of groups of known size are easily determined from basic geometry. For infinite groups, the group checks are carried out on an individual pile within the infinite group. In the ultimate values, negative skin friction is included as well as soil strength factors. Numerical results provided include the ultimate bearing and compression resistance, design tension capacity as well as a set of values for an equivalent single pile.

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