Experimental Investigation of Interference Between Adjacent Footings on Layered Cohesionless Soil

Boufarh, Rafik; Abbèche, Khelifa; Abdi, Abdelmadjid

doi:10.1007/s11204-019-09580-z

Cited by 6 publications

(4 citation statements)

References 24 publications

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“…The load-settlement curve for cases of isolated footing and two strip footings; both cases rest on the surface of a sand layer without cavities for various spacing (x/B) are presented in Figs. 4, it was found that the bearing capacity of the footings was maximum when the spacing ratios (interferences) from one center to another (footings) varied in the range of x/B = 1.25 to 1.5, these results are similar to those obtained by (Lee and Eun [14] ). This reflects the fact that larger footings cause larger settlements compared with smaller footings.…”

Section: Test Series X/b H/b L/bsupporting

confidence: 86%

“…Several studies have investigated the effect of footing interference on bearing capacity. Such as, Boufarh et al [4] experimentally investigated the effect of interference of two strip footings resting on a bilayer soil, and concluded that the efficiency factor is proportional to the internal friction angle of the ground of the first layer, particularly when the foundations are very close, because the increase of the angle of friction causes the expansion of the shear zone under the foundations. Gupta and Sitharam [7] conducted experimental and numerical studies on the interference of sand-based square footings, and concluded that the maximum interference effect is observed in the case wherein the spacing between the footings was 0.5B, and was approximately negligible in the case wherein the spacing between the footings was equal to 2B, which B is the width of the footing.…”

Section: Introductionmentioning

confidence: 99%

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Model experiments to assess effect of cavities on bearing capacity of two interfering superficial foundations resting on granular soil

Saadi

Abbèche

Boufarh

2020

Studia Geotechnica Et Mechanica

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AbstractThe objective of this paper is to describe the effect of cavities on the bearing capacity of two interfering footings based on granular soil using an exclusively experimental approach with a test model designed in the laboratory. The experimental protocol was carried out based on the variation of several parameters such as the spacing (x) (axis to axis) between the footings, and the distance (H) between the footings and cavities and between the cavities axes (L). The results highlight the effect of cavities and the interference of two strip footings on the bearing capacity factor (q) and efficiency factor (EF). Moreover, the results revealed that, in the case wherein the distance between the footings and the cavity is greater than 3, the cavity impact is eliminated.

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Section: Test Series X/b H/b L/bsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Model experiments to assess effect of cavities on bearing capacity of two interfering superficial foundations resting on granular soil

Saadi

Abbèche

Boufarh

2020

Studia Geotechnica Et Mechanica

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“…Authors in [10] studied the failure surface in granular soil under two closely spaced strip footings and concluded that the failure patterns observed for granular soil conform to those proposed by the theory in [2]. Authors in [11] experimentally studied the interference effect of two closely strip footings constructed on bi-layer soil. Authors in [12] studied experimentally and numerically the interference of closely spaced square footings on sandy soil, and concluded that the maximum interference effect is observed when the spacing between the two footings is 0.5B, and was approximately negligible when the spacing between the footings was equal to 2B, where B is the footing's width.…”

Section: Introductionmentioning

confidence: 70%

Behavior of Strip Footing/s above Void in Sandy Soil

Benbouza

Mansouri

Abbèche

2023

Eng. Technol. Appl. Sci. Res.

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This paper presents a numerical study that utilizes finite element analysis under the plain strain condition performed on sand with isolated strip footing and two closely spaced strip footings above a continuous void. The Bearing Capacity Ratio (BCR) and the efficiency factor ζγ were introduced to determine the effect of the void on the ultimate bearing capacity of footing/s. The influence of various parameters including spacing (S/B) (i.e. edge to edge) between the two interfering footings along with the location and the shape of the void were studied. In general, the results indicate that the presence of a void reduces the bearing capacity and affects the performance of footing/s and there is a critical value of S/B beyond which the effect of the void on the bearing capacity of the interfering footings becomes negligible.

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“…The studies offering the understanding of two or multiple interfering footings using analytical/numerical methods use upper and lower bound limit analysis [2][3][4][5][6][7], finite difference method [8][9][10], finite element method [11][12][13][14][15][16][17][18] and analytical method [19,20], the probabilistic method [21] and others [22]. Then several experimental studies [23][24][25][26][27][28][29] have been reported on the interference of surface footings. Lavasan et al [30] studied the behaviour of two adjacent rigid, rough strip footings laid on the surface of sand by employing finite difference method (FDM) and kinematic element methods (KEM).…”

Section: Introductionmentioning

confidence: 99%

Behavioural Assessment on Influence of Adjacently Placed Strip Footings at Different Embedment Level

Ekbote¹,

Nainegali

Rajhans

et al. 2022

Architecture, Civil Engineering, Environment

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The footings laid in close proximity imposes a definite change in the behaviour of the adjacent footing, subsequently changing the behaviour of the nearby footings. The present study emphasises the behaviour of the nearby strip footings embedded at a different level by adopting the commercially available finite element analysis program, ABAQUS. The load-settlement behaviour, ultimate bearing capacity (UBC), and the failure patterns of adjacent strip footings are assessed by considering the Mohr-Coulomb failure criterion. The UBC is of the nearby footings (left and right) are estimated and represented in terms of interference factors (ξL/ξR ) defined as the UBC of a footing in the presence of adjacent footing to that of same considered for equivalent isolated footing. The results reveal that a significant influence of the adjacent footing is experienced when the spacing between the footings (S/B) is lesser, and they behave as the single footing of greater width at S/B = 0.25 irrespective of the level of embedment depth. Furthermore, the influence of interference increases with the increase in the embedment depth of adjacent footing. It is found that the ξL is significantly more for a lower level of embedment depth, and the same increases with an increase in the embedment depth of the right footing but on the contrary ξR decreases. The increase in the peak interference factor, ξL-max for DL/B = 0.5 is 2.1% and 4.2% when DR/B = 0.75 and DR/B = 1.0, respectively.

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Experimental Investigation of Interference Between Adjacent Footings on Layered Cohesionless Soil

Cited by 6 publications

References 24 publications

Model experiments to assess effect of cavities on bearing capacity of two interfering superficial foundations resting on granular soil

Model experiments to assess effect of cavities on bearing capacity of two interfering superficial foundations resting on granular soil

Behavior of Strip Footing/s above Void in Sandy Soil

Behavioural Assessment on Influence of Adjacently Placed Strip Footings at Different Embedment Level

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