Behavior of Shallow Strip Footing on Twin Voids

Lavasan, Arash Alimardani; Talsaz, Ali; Ghazavi, Mahmoud; Schanz, Tom

doi:10.1007/s10706-016-9989-6

Cited by 44 publications

(18 citation statements)

References 18 publications

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“…Previous research works such as Lavasan et al, (2016), (Jayamohan et al, 2016) and Khattab and Khalil (2009) also had similar approaches to their developed models. Lavasan et al, (2016) conducted a parametric study to examine the bearing capacity of a strip foundation built on soil containing twin circular voids using PLAXIS 2D…”

Section: Introductionmentioning

confidence: 75%

Numerical investigation into the stability of earth dam slopes considering the effects of cavities

Alateya

Asr

2020

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Purpose This study is an attempt to estimate the influence of the presence of cavities on the stability of slopes in earth dams under rapid drawdown conditions. The purpose of this paper is to study the influence of different factors, such as the diameter and location of cavities, in addition to their existence effects. Design/methodology/approach A series of finite element simulation models were developed using PLAXIS 2D finite element software to analyse the stability of slopes in earth dams while considering various effects from cavities in the subsoil under rapid drawdown conditions. Findings The results indicated that the presence of cavities and an increase in the diameter of cavities decreased the stability of the upstream face dramatically for all examined locations in a horizontal direction; however, this effect was less on the downstream side. The results also showed that variations in the location of cavities in the horizontal direction have a greater effect on the stability than those in the vertical direction. The results revealed that increasing shear strength parameters of embankment does not reduce the influence of cavities on stability when those cavities are in critical locations. Originality/value A numerical model has been developed to simulate the effects of cavities on the stability of slopes in water-retaining structures/earth dams. The stability of earth dam slopes on upstream and downstream sides under rapid drawdown conditions considering various cavity effects, including their existence, diameter and location, were numerically analysed.

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Section: Introductionmentioning

confidence: 75%

Numerical investigation into the stability of earth dam slopes considering the effects of cavities

Alateya

Asr

2020

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“…The results obtained by this study revealed that the pressure applied to the adjacent strip footings above the twin cavities can be reduced by decreasing the distance between the two cavities to reach a maximum settlement (Lavasan et al [13] ). This occurs owing to the interference between the rupture mechanism formed below the footing and the cavities.…”

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

confidence: 84%

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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“…This was also the case when the position of the cavity in the horizontal distance X/B was >2.4-3; and when the load inclination angle increased to 30° or more measured from vertical axis. Similarly, many of the previous studies available in the literature such as Hossain et al (2006), Ghazavi and Soltanpour (2008), Peng et al (2006), Lavasan et al (2016), Kapoor et al (2019), Luo et al (2019), andZhao et al (2021) have focused on the effects of underground cavities on the bearing capacity of the foundation rather than settlement.…”

Section: Introductionmentioning

confidence: 95%

Numerical Evaluation of Settlement of Strip Footing Resting on Cavity and Weak Soil Profile

Hussain

2021

Polytechnic j.

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This study numerically investigates the effects of different subsurface sources of weaknesses within a soil profile on the settlement of a strip footing using the finite element method (FEM). During the first phase of the study, the influences of size, shape, depth, and distance of cavity from the center of the footing are evaluated. It is noted that the settlement of foundation is increased when the cavity is located at smaller depths and closer to its center. It is concluded that there is a critical zone, where the risk level of settlement (especially differential settlement) due to the cavity is high. The depth of this critical zone is found to be 2.5B (where B is the width of the footing) below the simulated loading area. In the second phase of the study, increasing the degree of weakness of a certain low stiffness layer within the soil profile below the loaded area is simulated as another factor that increases the settlement risks. It is shown that the depth of this weak layer highly controls the settlement of footing even if it is situated at depths >2.5B.

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Behavior of Shallow Strip Footing on Twin Voids

Cited by 44 publications

References 18 publications

Numerical investigation into the stability of earth dam slopes considering the effects of cavities

Numerical investigation into the stability of earth dam slopes considering the effects of cavities

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

Numerical Evaluation of Settlement of Strip Footing Resting on Cavity and Weak Soil Profile

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