Quick ELPLA 11 is a software that analyzes shallow and deep foundation problems. It can analyze stresses, strains, displacements, consolidation settlement, and degree of consolidation for shallow foundations. It also analyzes single piles, pile groups, piled rafts, stress coefficients according to GEDDES, and sheet pile walls for deep foundations. The software combines previous programs for shallow foundations, single piles, and footing groups into one program. It provides analytical and numerical solutions with graphical and tabulated output.

1. Quick ELPLA 11
Contents
1 Description of Quick ELPLA .........................................................................................................................1
2 Shallow foundations ...................................................................................................................................1
2.1 Stresses, strains, and displacements in soil ....................................................................................2
2.2 Consolidation settlement................................................................................................................7
2.3 Degree of consolidation..................................................................................................................8
2.4 Time-settlement curve..................................................................................................................11
2.5 Displacement of rigid raft .............................................................................................................13
2.6 Consolidation of rigid raft .............................................................................................................14
2.7 Settlement of footing groups........................................................................................................16
3 Deep foundations .....................................................................................................................................18
3.1 Analysis of single pile ....................................................................................................................19
3.2 Bearing capacity and settlement of single pile or pile wall...........................................................20
3.3 Analysis of piled raft......................................................................................................................22
3.4 Stress coefficient according to GEDDES........................................................................................25
3.5 Sheet pile wall...............................................................................................................................26

2. 1 Description of Quick ELPLA
Quick ELPLA 11 has significant enhancements resulted from user feedback over the last few years. The program
combines a) the old program Quick ELPLA for analyzing different shallow foundation problems; b) the program
TIEF for analyzing single piles, pile walls, rigid pile groups, and rigid piled rafts; and c) the program SETZ for
determining settlements of footing groups.
Quick ELPLA can analyze different type of shallow and deep foundations as described in the following sections.
Figure 1 Calculation Methods
2 Shallow foundations
Shallow foundation problems that can be analyzed are, Figure 2:
1. Stresses in soil
2. Strains in soil
3. Displacements in soil
4. Consolidation settlement
5. Degree of consolidation
6. Time-settlement curve
7. Displacement of rigid raft
8. Consolidation of rigid raft
9. Settlement of footing groups

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Figure 2 Menu “Shallow foundation problems”
2.1 Stresses, strains, and displacements in soil
Stresses, strains, and displacements in the soil can be determined and presented under any point on the
foundation or at any plane under the foundation, 0Figure 3 to Figure 9.

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Figure 3 Menu "Stress in soil"

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Figure 4 Tabulation of results in a text editor
Figure 5 Results as diagrams under a point on the foundation

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Figure 6 Results as contour lines at a plane under the foundation
Figure 7 Results as circular diagrams at a plane under the foundation

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Figure 8 Tabulation of results in plan at a plane under the foundation
Figure 9 Data in plan

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2.2 Consolidation settlement
Final consolidation settlement for any irregular foundation on layered soil can be determined, Figure 10 and 0.
Figure 10 Menu "Consolidation settlement"

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Figure 11 Final consolidation settlement under a polygon loaded area
2.3 Degree of consolidation
The degree of consolidation for linear and nonlinear analysis can be determined for multi-layered of clayey soil
with different calculation methods. Cyclic loading for more than 14 types of cyclic loading can be also
determined. Initial pore water pressure on the clay layers can be defined by the user or determined due to
different types of load geometries on the surface. The consolidation settlement in the place (x, y) due to point
load, rectangular uniform load or circular uniform load on the surface can be determined, Figure 12 to Figure
14.

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Figure 12 Menu “Degree of consolidation”

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Figure 13 Pore water pressure with time for multi-layered of clayey soil
Figure 14 Degree of consolidation for cyclic loading

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2.4 Time-settlement curve
The time-settlement curve of a building can be determined by three methods. Also, settlements during the
construction time and the final settlement from measurement results can be estimated through extrapolation.
The load can be applied in steps with time, Figure 150 to 0Figure 17.
Figure 15 Menu "Time-loading curve"

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Figure 16 Time-Load curve
Figure 17 Corrected time-settlement determination

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2.5 Displacement of rigid raft
Displacement and contact pressure under a rigid rectangular or circular raft on a soil layer can be determined
analytically or numerically. Also, half space soil model can be considered, Figure 18 and Figure 19.
Figure 18 Menu “Displacement of rigid raft”

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Figure 19 Contact pressure of a rigid raft
2.6 Consolidation of rigid raft
Final consolidation settlement and contact pressure under a rigid rectangular or circular raft on a clay layer can
be determined analytically or numerically. Also half space soil model can be considered, Figure 20 and Figure
21.

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Figure 20 Menu “Contact Pressure”
Figure 21 Consolidation settlement as contour lines under a rigid raft

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2.7 Settlement of footing groups
Limit depth and settlement of footing group on a layered soil can be determined, Figure 22 to Figure 25.
Figure 22 Menu "Settlement of footing groups"
Figure 23 System of loading and dimension of footing group

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Figure 24 Settlement of a group of footings

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Figure 25 Limit depth calculation and stress under the footing
3 Deep foundations
Deep foundation problems that can be analyzed are, Figure 26:
Analysis of single pile
Bearing capacity and settlement of single pile or pile wall
Analysis of piled raft
Stress coefficient according to GEDDES
Sheet pile wall

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Figure 26 Menu “Deep foundation problems”
3.1 Analysis of single pile
Linear and nonlinear analyses for piles can be carried out. Elastic pile is analyzed using the finite element
method. Half space and layered soil models are considered, Figure 27 and Figure 28.
Figure 27 Menu "Analysis of single pile"

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Figure 28 Elastic and rigid displacement along the pile
3.2 Bearing capacity and settlement of single pile or pile wall
Bearing capacity and settlement of single piles or pile walls according to DIN 4014 can be determined.
The input data are dimensions of piles, pile tip resistance from penetration test or cohesion Cu of the layers.
Skin friction of the pile can be defined by the user or determined according to DIN 4014, Figure 29 and Figure
30.

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Figure 29 Menu “Bearing capacity and settlement“
Figure 30 Load settlement curve for pile according to DIN 4014

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3.3 Analysis of piled raft
The settlement of groups of vertically loaded piles and rigid piled raft on layered soil or half space medium can
be determined, Figure 31 to Figure 35. The methods of soil analysis are:
 Linear analysis
 Nonlinear analysis using a hyperbolic function for load-settlement
 Nonlinear analysis using DIN 4014 for load-settlement
Figure 31 Menu “Analysis of piled raft“

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Figure 32 Pile location and groups
Figure 33 Contact pressure under the piled raft

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Figure 34 Pile reactions of piled raft
Figure 35 System of loading

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3.4 Stress coefficient according to GEDDES
Stresses coefficient due to a load under the surface according to GEDDES can be obtained Figure 36 and Figure
370.
Three types of loading are considered:
 Stress coefficient for a point load.
 Stress coefficient for uniform skin friction.
 Stress coefficient for linear variation of skin friction.
Figure 36 Menu "Stress coefficient according to GEDDES"

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Figure 37 Stress coefficient according to GEDDES
3.5 Sheet pile wall
The length of sheet pile can be determined for, Figure 38 to Figure 41:
 Cantilever sheet pile wall.
 Anchored sheet pile wall with free earth support.
 Anchored sheet pile wall with fixed earth support.

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Figure 38 Menu "Sheet pile wall"

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Figure 39 Earth pressure on the sheet pile
Figure 40 Moments on the sheet pile

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Figure 41 Shear forces on the sheet pile
Program authors:
M. El Gendy
A. El Gendy
GEOTEC Software Inc.
PO Box 14001 Richmond Road PO, Calgary AB, Canada T3E 7Y7
Tele.:+1(587) 332-3323
geotec@geotecsoftware.com
www.geotecsoftware.com