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Anchors

Anchors, no flow around mechanism (drained)


Drained anchor, D/B = 2, phi'=20 degrees, vertical load

Benchmark3.46
Result3.46
Discrepancy on Collapse Load0.01%
Discrepancy on Input Parameters0%

GENERAL DESCRIPTION: Simple horizontal anchor, horizontal soil surface.
ANALYSIS TYPE: Drained.
KEY DIMENSIONS: Anchor width 1m, soil cover depth 2m.
ADEQUACY FACTOR LOADING: Vertical load on anchor (unit permanent load 1kN/m2).
BOUNDARY CONDITIONS: No surcharge, symmetrical half space, rough anchor.
SOIL PROPERTIES: c'=0, phi' = 20 degrees, soil unit weight = 1 kN/m3.
PARTIAL FACTOR SET: Unity.
BENCHMARK SOLUTION: 3.456
REFERENCE: Smith C.C. (1998) Limit Loads for an Anchor/Trapdoor Embedded in an Associative Coulomb Soil. Int. J. Numer. Anal. Meth. Geomech., 22, pp 855-865.



Drained anchor, D/B = 5, phi'=20 degrees, vertical load

Benchmark14.1
Result14.1
Discrepancy on Collapse Load0.02%
Discrepancy on Input Parameters0%

GENERAL DESCRIPTION: Simple horizontal anchor, horizontal soil surface.
ANALYSIS TYPE: Drained.
KEY DIMENSIONS: Anchor width 1m, soil cover depth 5m. .
ADEQUACY FACTOR LOADING: Vertical load on anchor (unit permanent load 1kN/m2).
BOUNDARY CONDITIONS: No surcharge, symmetrical half space, rough anchor.
SOIL PROPERTIES: c'=0, phi' = 20 degrees, soil unit weight = 1 kN/m3.
PARTIAL FACTOR SET: Unity.
BENCHMARK SOLUTION: 14.099
REFERENCE: Smith C.C. (1998) Limit Loads for an Anchor/Trapdoor Embedded in an Associative Coulomb Soil. Int. J. Numer. Anal. Meth. Geomech., 22, pp 855-865.



Drained anchor, D/B = 2, phi'=30 degrees, vertical load

Benchmark4.31
Result4.31
Discrepancy on Collapse Load0.02%
Discrepancy on Input Parameters0%

GENERAL DESCRIPTION: Simple horizontal anchor, horizontal soil surface.
ANALYSIS TYPE: Drained.
KEY DIMENSIONS: Anchor width 1m, soil cover depth 2m.
ADEQUACY FACTOR LOADING: Vertical load on anchor (unit permanent load 1kN/m2).
BOUNDARY CONDITIONS: No surcharge, symmetrical half space, rough anchor.
SOIL PROPERTIES: c'=0, phi' = 30 degrees, soil unit weight = 1 kN/m3.
PARTIAL FACTOR SET: Unity.
BENCHMARK SOLUTION: 4.309
REFERENCE: Smith C.C. (1998) Limit Loads for an Anchor/Trapdoor Embedded in an Associative Coulomb Soil. Int. J. Numer. Anal. Meth. Geomech., 22, pp 855-865.



Drained anchor, D/B = 5, phi'=30 degrees, vertical load

Benchmark19.43
Result19.44
Discrepancy on Collapse Load0.02%
Discrepancy on Input Parameters0%

GENERAL DESCRIPTION: Simple horizontal anchor, horizontal soil surface.
ANALYSIS TYPE: Drained.
KEY DIMENSIONS: Anchor width 1m, soil cover depth 5m. .
ADEQUACY FACTOR LOADING: Vertical load on anchor (unit permanent load 1kN/m2).
BOUNDARY CONDITIONS: No surcharge, symmetrical half space, rough anchor.
SOIL PROPERTIES: c'=0, phi' = 30 degrees, soil unit weight = 1 kN/m3.
PARTIAL FACTOR SET: Unity.
BENCHMARK SOLUTION: 19.434
REFERENCE: Smith C.C. (1998) Limit Loads for an Anchor/Trapdoor Embedded in an Associative Coulomb Soil. Int. J. Numer. Anal. Meth. Geomech., 22, pp 855-865.


Anchors, no flow around mechanism (undrained)


Undrained anchor (weightless soil), D/B = 2, vertical load

Benchmark3.69
Result3.74
Discrepancy on Collapse Load1.41%
Discrepancy on Input Parameters1.41%

GENERAL DESCRIPTION: Simple horizontal anchor, horizontal soil surface.
ANALYSIS TYPE: Undrained.
KEY DIMENSIONS: Anchor width 1m, soil cover depth 2m.
ADEQUACY FACTOR LOADING: Vertical load on anchor (unit permanent load 1kN/m2).
BOUNDARY CONDITIONS: No surcharge, symmetrical half space, rough anchor.
SOIL PROPERTIES: c_u=1 kN/m2, soil unit weight = 0 kN/m3.
PARTIAL FACTOR SET: Unity.
BENCHMARK SOLUTION: Upper bound = 3.83, Lower bound = 3.55, mean = 3.69.
REFERENCE: Merifield, R.S., Sloan, S.W. , Yu, H.S. (2001) Stability of plate anchors in undrained clay, Geotechnique, 51, No. 2, pp 141-153.



Undrained anchor (weightless soil), D/B = 3, vertical load

Benchmark4.77
Result4.84
Discrepancy on Collapse Load1.45%
Discrepancy on Input Parameters1.45%

GENERAL DESCRIPTION: Simple horizontal anchor, horizontal soil surface.
ANALYSIS TYPE: Undrained.
KEY DIMENSIONS: Anchor width 1m, soil cover depth 3m.
ADEQUACY FACTOR LOADING: Vertical load on anchor (unit permanent load 1kN/m2).
BOUNDARY CONDITIONS: No surcharge, symmetrical half space, rough anchor.
SOIL PROPERTIES: c_u=1 kN/m2, soil unit weight = 0 kN/m3.
PARTIAL FACTOR SET: Unity.
BENCHMARK SOLUTION: Upper bound = 4.95, Lower bound = 4.59, mean = 4.77.
REFERENCE: Merifield, R.S., Sloan, S.W. , Yu, H.S. (2001) Stability of plate anchors in undrained clay, Geotechnique, 51, No. 2, pp 141-153.



Undrained anchor (weightless soil), D/B = 4, vertical load

Benchmark5.53
Result5.6
Discrepancy on Collapse Load1.29%
Discrepancy on Input Parameters1.29%

GENERAL DESCRIPTION: Simple horizontal anchor, horizontal soil surface.
ANALYSIS TYPE: Undrained.
KEY DIMENSIONS: Anchor width 1m, soil cover depth 4m.
ADEQUACY FACTOR LOADING: Vertical load on anchor (unit permanent load 1kN/m2).
BOUNDARY CONDITIONS: No surcharge, symmetrical half space, rough anchor.
SOIL PROPERTIES: c_u=1 kN/m2, soil unit weight = 0 kN/m3.
PARTIAL FACTOR SET: Unity.
BENCHMARK SOLUTION: Upper bound = 5.74, Lower bound = 5.32, mean = 5.53.
REFERENCE: Merifield, R.S., Sloan, S.W. , Yu, H.S. (2001) Stability of plate anchors in undrained clay, Geotechnique, 51, No. 2, pp 141-153.



Undrained anchor (weightless soil), D/B = 5, vertical load

Benchmark6.12
Result6.2
Discrepancy on Collapse Load1.36%
Discrepancy on Input Parameters1.36%

GENERAL DESCRIPTION: Simple horizontal anchor, horizontal soil surface.
ANALYSIS TYPE: Undrained.
KEY DIMENSIONS: Anchor width 1m, soil cover depth 5m.
ADEQUACY FACTOR LOADING: Vertical load on anchor (unit permanent load 1kN/m2).
BOUNDARY CONDITIONS: No surcharge, symmetrical half space, rough anchor.
SOIL PROPERTIES: c_u=1 kN/m2, soil unit weight = 0 kN/m3.
PARTIAL FACTOR SET: Unity.
BENCHMARK SOLUTION: Upper bound = 6.36, Lower bound = 5.89, mean = 6.12.
REFERENCE: Merifield, R.S., Sloan, S.W. , Yu, H.S. (2001) Stability of plate anchors in undrained clay, Geotechnique, 51, No. 2, pp 141-153.



Undrained anchor (weightless soil), D/B = 10, vertical load

Benchmark7.97
Result8.1
Discrepancy on Collapse Load1.57%
Discrepancy on Input Parameters1.57%

GENERAL DESCRIPTION: Simple horizontal anchor, horizontal soil surface.
ANALYSIS TYPE: Undrained.
KEY DIMENSIONS: Anchor width 1m, soil cover depth 10m.
ADEQUACY FACTOR LOADING: Vertical load on anchor (unit permanent load 1kN/m2).
BOUNDARY CONDITIONS: No surcharge, symmetrical half space, rough anchor.
SOIL PROPERTIES: c_u=1 kN/m2, soil unit weight = 0 kN/m3.
PARTIAL FACTOR SET: Unity.
BENCHMARK SOLUTION: Upper bound = 8.27, Lower bound = 7.67, mean = 7.97.
REFERENCE: Merifield, R.S., Sloan, S.W. , Yu, H.S. (2001) Stability of plate anchors in undrained clay, Geotechnique, 51, No. 2, pp 141-153.



Undrained anchor, D/B = 2, vertical load

Benchmark5.69
Result5.74
Discrepancy on Collapse Load0.92%
Discrepancy on Input Parameters0.92%

GENERAL DESCRIPTION: Simple horizontal anchor, horizontal soil surface.
ANALYSIS TYPE: Undrained.
KEY DIMENSIONS: Anchor width 1m, soil cover depth 2m.
ADEQUACY FACTOR LOADING: Vertical load on anchor (unit permanent load 1kN/m2).
BOUNDARY CONDITIONS: No surcharge, symmetrical half space, rough anchor.
SOIL PROPERTIES: c_u=1 kN/m2, soil unit weight = 1 kN/m3.
PARTIAL FACTOR SET: Unity.
BENCHMARK SOLUTION: Upper bound = 5.83, Lower bound = 5.55, mean = 5.69.
REFERENCE: Merifield, R.S., Sloan, S.W. , Yu, H.S. (2001) Stability of plate anchors in undrained clay, Geotechnique, 51, No. 2, pp 141-153.



Undrained anchor, D/B = 3, vertical load

Benchmark7.77
Result7.84
Discrepancy on Collapse Load0.9%
Discrepancy on Input Parameters0.9%

GENERAL DESCRIPTION: Simple horizontal anchor, horizontal soil surface.
ANALYSIS TYPE: Undrained.
KEY DIMENSIONS: Anchor width 1m, soil cover depth 3m.
ADEQUACY FACTOR LOADING: Vertical load on anchor (unit permanent load 1kN/m2).
BOUNDARY CONDITIONS: No surcharge, symmetrical half space, rough anchor.
SOIL PROPERTIES: c_u=1 kN/m2, soil unit weight = 1 kN/m3.
PARTIAL FACTOR SET: Unity.
BENCHMARK SOLUTION: Upper bound = 7.95, Lower bound = 7.59, mean = 7.77.
REFERENCE: Merifield, R.S., Sloan, S.W. , Yu, H.S. (2001) Stability of plate anchors in undrained clay, Geotechnique, 51, No. 2, pp 141-153.



Undrained anchor, D/B = 4, vertical load

Benchmark9.53
Result9.6
Discrepancy on Collapse Load0.75%
Discrepancy on Input Parameters0.75%

GENERAL DESCRIPTION: Simple horizontal anchor, horizontal soil surface.
ANALYSIS TYPE: Undrained.
KEY DIMENSIONS: Anchor width 1m, soil cover depth 4m.
ADEQUACY FACTOR LOADING: Vertical load on anchor (unit permanent load 1kN/m2).
BOUNDARY CONDITIONS: No surcharge, symmetrical half space, rough anchor.
SOIL PROPERTIES: c_u=1 kN/m2, soil unit weight = 1 kN/m3.
PARTIAL FACTOR SET: Unity.
BENCHMARK SOLUTION: Upper bound = 9.74, Lower bound = 9.32, mean = 9.53.
REFERENCE: Merifield, R.S., Sloan, S.W. , Yu, H.S. (2001) Stability of plate anchors in undrained clay, Geotechnique, 51, No. 2, pp 141-153.



Undrained anchor, D/B = 5, vertical load

Benchmark11.12
Result11.2
Discrepancy on Collapse Load0.75%
Discrepancy on Input Parameters0.75%

GENERAL DESCRIPTION: Simple horizontal anchor, horizontal soil surface.
ANALYSIS TYPE: Undrained.
KEY DIMENSIONS: Anchor width 1m, soil cover depth 5m.
ADEQUACY FACTOR LOADING: Vertical load on anchor (unit permanent load 1kN/m2).
BOUNDARY CONDITIONS: No surcharge, symmetrical half space, rough anchor.
SOIL PROPERTIES: c_u=1 kN/m2, soil unit weight = 1 kN/m3.
PARTIAL FACTOR SET: Unity.
BENCHMARK SOLUTION: Upper bound = 11.36, Lower bound = 11.89, mean = 11.12.
REFERENCE: Merifield, R.S., Sloan, S.W. , Yu, H.S. (2001) Stability of plate anchors in undrained clay, Geotechnique, 51, No. 2, pp 141-153.



Undrained anchor, D/B = 10, vertical load

Benchmark17.97
Result18.1
Discrepancy on Collapse Load0.7%
Discrepancy on Input Parameters0.7%

GENERAL DESCRIPTION: Simple horizontal anchor, horizontal soil surface.
ANALYSIS TYPE: Undrained.
KEY DIMENSIONS: Anchor width 1m, soil cover depth 10m.
ADEQUACY FACTOR LOADING: Vertical load on anchor (unit permanent load 1kN/m2).
BOUNDARY CONDITIONS: No surcharge, symmetrical half space, rough anchor.
SOIL PROPERTIES: c_u=1 kN/m2, soil unit weight = 1 kN/m3.
PARTIAL FACTOR SET: Unity.
BENCHMARK SOLUTION: Upper bound = 18.27, Lower bound = 17.67, mean = 17.97.
REFERENCE: Merifield, R.S., Sloan, S.W. , Yu, H.S. (2001) Stability of plate anchors in undrained clay, Geotechnique, 51, No. 2, pp 141-153.


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