Effect of Different Shape of Footing on its Load-Settlement Behaviour
(Circular, Square and Rectangular)

Patel, Manav; Bhoi, Manas Kumar

doi:10.11159/icgre19.168

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…The results revealed that the shape of the footing had a significant effect on the bearing pressure and settlement characteristics. From the above discussion, the results obtained were in line with [40]. It was validated that the square plate performed better in comparison to the circular plate in terms of enhancement in bearing capacity, BCR and SRF.…”

Section: Effect Of Size and Shape On Ultimate Bearing Capacity (Qu) And Settlementsupporting

confidence: 74%

Development of Single-Phase Microbial Cementation Method and to Investigate its Efficacy on Bearing Capacity, UCS, and Permeability of Sandy Soils

Kulkarni

Nemade²,

Chavan

et al. 2021

J. Eng. Technol. Sci.

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Microbially induced calcite precipitation (MICP) is a method based on collaborative knowledge of microbiology, chemistry and geotechnical engineering. The objective of this study was to investigate the increase of the bearing capacity and the unconfined compressive strength (UCS) as well as the reduction of the permeability of sandy soil using MICP. Experiments were carried out using Bacillus Pasteurii, on three different types of sand. The admixture of bacterial culture and cementation (BCC) solution all-in-one with sand by single-phase injection was applied to induce cementation. Three samples of the selected sand were treated with varied concentrations of BCC solution, ranging from 0.05 to 0.2 L/kg, with a curing period of 3, 7 and 14 days. The test results indicated an enhancement of 55% in UCS for sand treated with a BCC content of 0.05 to 0.2 L/Kg and a reduction of 40% in permeability for untreated sand with an effective diameter of 0.5 mm treated with 0.2 L/kg of BCC solution after 14 days of curing. The results of a plate load test (PLT) on MICP treated sand showed an increase in the ultimate bearing capacity (qu) by about 2.95 to 5.8 times and a 1.7 to 3.31-fold reduction in settlement corresponding to the same load applied on untreated footing. Further investigation of the size and shape of the bearing plate on bearing capacity and settlement was carried out through a plate load test. The higher and more favorable results shown by a rectangular plate compared to a circular plate indicate that the first is preferable.

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Section: Effect Of Size and Shape On Ultimate Bearing Capacity (Qu) And Settlementsupporting

confidence: 74%

Development of Single-Phase Microbial Cementation Method and to Investigate its Efficacy on Bearing Capacity, UCS, and Permeability of Sandy Soils

Kulkarni

Nemade²,

Chavan

et al. 2021

J. Eng. Technol. Sci.

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show abstract

“…Vertical stress reaches a constant value which is greater in circular footing by about (70.9 -92.7) % than square footing. The result obtained from the model test performed by Patel and Bhoi [12] on the different footings to examine the influence of footing"s shape on the bearing pressure and settlement showed that the ultimate bearing capacity of the footing increases in order circular, square and rectangle, relative density being 80% . Similar trend is observed for 60% relative density.…”

Section: Effect Of Foundation Shape On the Transmitted Vertical Smentioning

confidence: 99%

Cyclic Settlement of Footings of Different Shapes Resting on Clayey Soil

Najim¹,

Fattah²,

Al-Recaby³

2020

ETJ

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An experimental investigation is carried out to investigate the impact of the footing shape, when rested on clayey soil under cyclic loading condition. The model footings used in this study are circular, square and the area of footings is fixed. Cyclic load test is carried out on the cohesive soil with three undrained shear strengths (20 kPa, 40 kPa and 70 kPa). Two depths of foundation embedment (at surface and 5 cm) to know the effect of the depths of the foundations on the change of settlement and total vertical stress and two rates of loading (3 mm/sec and 6 mm/sec) are used. It has been observed that the bearing capacity varies in increasing order as Solid, Circular and Square. It is found that the cyclic settlement in the square foundation is less than the circular foundation. The results reveal that the shape of the footing has a significant effect on its bearing capacity and the settlement characteristics. The vertical stress reaches a constant value which is greater below circular footing and it is about (70.9 - 92.7) % greater than below square footing.

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Settlement-Time Aspect for Equal-Area Footings with Polygon Shapes Lying on Gypseous Soil

Imariq,

Zakaria,

Abbas

2024

Tikrit j. eng. sci.

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Gypseous soil is one type of collapsible soil. It is well known in Iraq for causing structural distress to many engineering facilities. It is characterized as having high strength properties as being dry, but when wetted with water, it experiences rapid collapse settlement. The present laboratory study evaluates the collapse settlement for several polygons and non-common footing shapes and compares them. In some structural facilities, such problems may arise when using polygon footing shapes due to reasons regarding non-uniform spacing left for footing, restrictions due to property lines or sanitary works. For this purpose, a large laboratory tank model had lateral dimensions of 0.8× 1.0m and a depth of 0.8m. The studied gypseous soil, with 63% gypsum content, was from Tikrit City, about 200km north of Baghdad/ Iraq. It is compacted to a dry unit weight of 14.82kN/m3 in the model. The used shapes of footings were a square, circular, equilateral triangle, rectangular, plane strain, trapezoidal, and isosceles triangle. All footings were (100 cm2) and bear the same applied pressure (40kN/m2). Both dry and then soaking stages for soil were conducted. The experiments were conducted, such as one test for each tank. The test results revealed that the maximum collapse settlement recorded was in the case of the isosceles triangle, i.e., (settlement/equivalent width) ratio Δs/B is 0.24. The least collapse settlement was for the case of square footing with a Δs/B of 0.15. The settlement measured when the soil dried was about 1-1.3 mm for all footing shapes, i.e., Δs/B=0.01-0.013. The collapse settlement stopped after 5-7 days, while the dry condition settlement took less than one hour to level off and end.

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Effect of Different Shape of Footing on its Load-Settlement Behaviour (Circular, Square and Rectangular)

Cited by 3 publications

References 5 publications

Development of Single-Phase Microbial Cementation Method and to Investigate its Efficacy on Bearing Capacity, UCS, and Permeability of Sandy Soils

Development of Single-Phase Microbial Cementation Method and to Investigate its Efficacy on Bearing Capacity, UCS, and Permeability of Sandy Soils

Cyclic Settlement of Footings of Different Shapes Resting on Clayey Soil

Settlement-Time Aspect for Equal-Area Footings with Polygon Shapes Lying on Gypseous Soil

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