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Load capacity of the mixed bench and slab foundation. Numerical simulations and analytical calculation model

Michał Grodecki

Michał Grodecki

Civil Engineering Department, Cracow University of TechnologyCracow, Poland
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Grodecki, Michał
  
30 jun 2021
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Categoría del artículo: Original Study
Publicado en línea: 30 jun 2021
Páginas: 135 - 141
Recibido: 20 may 2020
Aceptado: 03 mar 2021
DOI: https://doi.org/10.2478/sgem-2021-0005
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© 2021 Michał Grodecki, published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

Typical foundation of the antique building (without or with basement).
Typical foundation of the antique building (without or with basement).

Figure 2

Sources of the foundation load capacity deficiency: a) basement deepening, b) load increase.
Sources of the foundation load capacity deficiency: a) basement deepening, b) load increase.

Figure 3

Remedies used to increase the load capacity of the existing foundation: increase of the existing foundation dimension: a) horizontal, b) horizontal and vertical, c) pressure injection, d) micropiles installation, e) addition of the reinforced concrete foundation slab.
Remedies used to increase the load capacity of the existing foundation: increase of the existing foundation dimension: a) horizontal, b) horizontal and vertical, c) pressure injection, d) micropiles installation, e) addition of the reinforced concrete foundation slab.

Figure 4

Proposed substitute foundation for benches, slab and soil between them.
Proposed substitute foundation for benches, slab and soil between them.

Figure 5

2D numerical model of the simple single bench with boundary conditions—with soil above foundation level modelled as: a) a Coulomb-Mohr continuum, b) an equivalent load.
2D numerical model of the simple single bench with boundary conditions—with soil above foundation level modelled as: a) a Coulomb-Mohr continuum, b) an equivalent load.

Figure 6

Failure mode of the single bench.
Failure mode of the single bench.

Figure 7

Example of the load—settlement curve, ultimate load reached.
Example of the load—settlement curve, ultimate load reached.

Figure 8

2D numerical model of the bench and slab with boundary conditions.
2D numerical model of the bench and slab with boundary conditions.

Figure 9

Failure mode of the bench and slab foundation, 2D calculations result.
Failure mode of the bench and slab foundation, 2D calculations result.

Figure 10

3D numerical model of the bench and slab, equivalent load approach.
3D numerical model of the bench and slab, equivalent load approach.

Figure 11

Obtained values of ultimate load as a function of B/L ratio.
Obtained values of ultimate load as a function of B/L ratio.

Figure 12

Failure mode of the bench and slab foundation, 3D calculations result.
Failure mode of the bench and slab foundation, 3D calculations result.

Figure 13

Example of load—settlement curves for bench and central point of the slab—results of the 3D calculations.
Example of load—settlement curves for bench and central point of the slab—results of the 3D calculations.

Parameters of soil used in the bearing capacity analysis_

Material E [MPa] γ [kN/m3] ϕ [°] c [kPa]
Medium capacity clay 15 20 10 10
Low capacity clay 5 18 5 5
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Geociencias, Geociencias, otros, Ciencia de los materiales, Compuestos, Materiales porosos, Física, Mecánica y dinámica de fluidos
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