Pressure-settlement behavior of square and rectangular skirted footings resting on sand

Khatri, Vishwas N.; Debbarma, S.P.; Dutta, Rakesh Kumar; Mohanty, Bikash

doi:10.12989/gae.2017.12.4.689

Cited by 31 publications

(21 citation statements)

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“…For sands S1, S2 and S3, the angle of friction calculated was 33.37°, 36.52° and 39.47°, respectively. It is worth mentioning here that [12] and [24] also obtained the friction angle of the sand as 33.4° and 32.5°, respectively, to a relative density of 30%. The Young's modulus (corresponding to 50% of the peak stress) for sands S1, S2 and S3 obtained from the stress-strain curves was 4.8 MPa, 5.2 MPa and 5.5 MPa, respectively, to a confining pressure of 50 kPa.…”

Section: Materials Used and Experimental Methodsmentioning

confidence: 77%

“…In recent years, experimental research on skirted footings such as strip [5][6][7], square [4,[8][9][10][11][12], circular [6,[13][14][15][16][17][18][19][20][21][22][23] and rectangular [12], subjected to vertical or inclined loads, has been reported. Numerical studies on skirted footing such as strip [6], square [10] and circular [6] were reported in the literature.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and numerical studies of skirted hexagonal footings on three sands

Thakur

Dutta

2020

SN Appl. Sci.

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The paper presents an experimental and numerical study to determine the ultimate bearing capacity of unskirted, singly and doubly skirted hexagonal footings on sands S1 (D 10 = 0.14), S2 (D 10 = 0.45) and S3 (D 10 = 1.45). Laboratory plate load tests were conducted in this connection on the unskirted, singly and doubly skirted hexagonal footings on three sands placed in a test tank at a relative density of 30%. The length of the skirt ranged from 0.0B to 1.5B. The results show that the bearing capacity for the skirted hexagonal footings on sand S3 was higher, followed by sands S2 and S1. However, the results revealed that the numerically obtained bearing capacity was comparable with the one obtained experimentally for the hexagonal footings on three sands. In addition, the experimental findings confirmed numerical results obtained with an average deviation of 1%. Double-skirt provision provides marginal improvement in the bearing capacity compared to singly skirted footings. The pattern of failure produced supports observations of the bearing capacity of the unskirted, singly and doubly skirted hexagonal footings on three sands.

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Section: Materials Used and Experimental Methodsmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Experimental and numerical studies of skirted hexagonal footings on three sands

Thakur

Dutta

2020

SN Appl. Sci.

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“…5 and 6 with a skirt depth ratio of 0.25 and 1.5 corresponding to a relative density of 30% and 60%. The procedure reported by Khatri et al [24] and Gnananandarao et al [25] was followed for determining the bearing capacity. The experimental bearing capacity of the square, plus and double box shaped footings were tabulated in Table 4.…”

Section: Influence Of Skirt Depth On Bearing Capacitymentioning

confidence: 99%

Model studies of plus and double box shaped skirted footings resting on sand

2020

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Civil engineers are always looking for innovative techniques for reducing the settlement and improving the bearing capacity of the subsoil. A large number of such techniques are available in literature. These techniques are costly, limited by the site condition and are difficult to apply to the existing footings in certain circumstances. In this context, skirted footings offer an alternative method which can be applied for the shallow footings. Skirted footings are generally constructed with steel or concrete. Such footings have a raft with a thin wall along its edge towards the subsoil. The skirt enters into the soil under the footing, making an enclosure where the soil is firmly confined. Inside the skirts, the confined soil acts as a single unit to transfer the structural load from the bottom edge of the skirt to the subsoil. Skirted footings can be used as an alternative to surface, pier and pile foundations for offshore structures, wind turbines, oil platforms, and jacket structures as reported by Byrne et al. [1]. The unskirted/skirted model plus and double box shaped footings were therefore used in the present work to study their behaviour through laboratory tests. Such unconventional geometry in certain cases is

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“…Load carrying capacity of footing increases with increase in inclination of load in plan. Khatri et al (2017) [7] investigated the pressure-settlement behavior and bearing capacity of square and rectangular skirted foundation resting on sand and subjected to a vertical load through laboratory experimental tests. They used a foundation with a width of 50 mm and 60 mm and length/width ratio of 1 and 2.…”

Section: Literature Reviewmentioning

confidence: 99%

Response of Skirted Foundations Resting on Dry Medium Dense Sand

Haider

Mekkiyah

2018

CivileJournal

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Experimental model tests were carried out to study the response of skirted foundation resting on dry sand. The experiments were performed in a large soil container (1000 1000 mm in cross section and 800 mm in height). Skirts with three different lengths (L) varied from 0.5D to 1.5D was attached to the edge of shallow circular foundations having three different diameters (D=60, 90 and 120 mm). Different parameters have been studied; these parameters involve skirt length, foundation size and skirt conditions. Skirts with open end and closed end were used. The relative density was kept constant and equals to 60%. The case of foundation without skirt (L=0) was initially tested and set as a reference for comparison purpose. From the results of experimental tests, it was found that the skirt modifies the load-settlement behaviour, increasing the load carrying capacity and reducing the foundation settlement. The results also indicate that load carrying capacity of skirted foundation increases with increase skirt length as well as foundation size. The results show that using skirt with closed end brought a considerable increase in load carrying capacity than that of open end.

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Pressure-settlement behavior of square and rectangular skirted footings resting on sand

Cited by 31 publications

References 0 publications

Experimental and numerical studies of skirted hexagonal footings on three sands

Experimental and numerical studies of skirted hexagonal footings on three sands

Model studies of plus and double box shaped skirted footings resting on sand

Response of Skirted Foundations Resting on Dry Medium Dense Sand

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