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

Studia Geotechnica et Mechanica
Volume 43 (2021): Issue 2 (June 2021)
By:
Open Access
|Jun 2021

Figures & Tables

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_

MaterialE [MPa]γ [kN/m3]ϕ [°]c [kPa]
Medium capacity clay15201010
Low capacity clay51855
DOI: https://doi.org/10.2478/sgem-2021-0005 | Journal eISSN: 2083-831X | Journal ISSN: 0137-6365
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Language: English
Page range: 135 - 141
Submitted on: May 20, 2020
Accepted on: Mar 3, 2021
Published on: Jun 30, 2021
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
Bench and slab foundation,
load capacity,
numerical modelling
Related subjects:
Geosciences,
Geosciences, other,
Materials sciences,
Composites,
Porous materials,
Physics,
Mechanics and fluid dynamics

© 2021 Michał Grodecki, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution 4.0 License.

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