Improving the bearing capacity of footing on soft clay with sand pile with/without skirts

Nazir, Ashraf; Azzam, Waseim

doi:10.1016/j.aej.2010.06.002

Cited by 33 publications

(19 citation statements)

References 8 publications

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“…Sand piles inserted in soft clay with/without skirts shows remarkable improvement for circular footing at shallow depth. Reduction in the vertical settlement was also observed when soft clay was reinforced with sand piles with confine skirts [20]. Trench filled with granular material not only provides a strong base but also distributes the load on a wider area with improvement in the bearing capacity [21].…”

Section: Introductionmentioning

confidence: 93%

An Experimental Study on Corex (Steel) Slag Reinforced with Terrazyme Treated Clay for Improvement of Soft Soil

Vasiya

Solanki²

2022

Trends Sci

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Stability and settlement problems are common for foundations constructed on soft soils. In major parts of the world, ground improvement techniques have been used to mitigate these challenges. This research aims to stabilize the soft soils using corex steel slag blended with terrazyme treated clay. The corex steel slag is an industrial waste formed during the extraction of steel from ores through the corex process. The corex slag of sand size in the form of columns have been used to improve the load-carrying capacity of the soft soils and to control the settlement. To increase the stiffness of the corex slag columns, the terrazyme treated clay was mixed with the corex slag. The terrazyme is an eco-friendly and sustainable organic liquid and it is fully soluble in water. To prepare the terrazyme-processed clay gel 0 to 3 % of terrazyme dissolved in water was used. Maximum Dry Density (MDD) and Optimum Moisture Content (OMC) for terrazyme treated clay were determined through the compaction tests. Appropriate proportions of corex slag and terrazyme treated clay with a suitable curing period were obtained from unconfined compression tests. A series of laboratory model plate load tests for 3 foundation shapes were performed on soft soil, stabilized with a blend of corex slag and terrazyme treated clay. Improvement in the MDD with a reduction in OMC was noticed when terrazyme was added to soft soil. Unconfined Compressive Strength (UCS) value for corex slag increased with an increase in the content of terrazyme treated clay. Model plate load tests showed significant improvement in the load-carrying capacity of soft soil. HIGHLIGHTS Stability and settlements are the major problems for foundation constructed on soft soil Corex (Steel) slag blended with terrazyme treated clay is utilized to stabilize the soft soil The specimens prepared with corex steel slag and terrazyme treated clay demonstrate remarkable improvement in UCS value at 21 to 28 days of curing The soft soil stabilize with specimens in group reveled remarkable improvement in load-carrying capacity of soft soil GRAPHICAL ABSTRACT

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Section: Introductionmentioning

confidence: 93%

An Experimental Study on Corex (Steel) Slag Reinforced with Terrazyme Treated Clay for Improvement of Soft Soil

Vasiya

Solanki²

2022

Trends Sci

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“…The need for structures built on poor/weak soil has increased as a result of the fast development of infrastructures and urbanization. There are various techniques developed by geotechnical engineers to enhance the behaviour of weak soil in terms of strength, stiffness of soil and reduce the vulnerability to liquefaction [1][2][3]. Among the various ground improvement techniques available, such as replacing poor soil with good-fill soil, using various chemical treatments, cement grouting, preloading with vertical drains, and so on, soil reinforcement in various modified forms is widely admired for its cost, technical, and environmental versatility [4][5].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Square Footing Positioned on Geocell Reinforced Sand By Using Abaqus Software

Juneja

Sharma

2022

Civil and Environmental Engineering Reports

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The usage of geocell reinforcement for foundations supported on weak soil has been increased these days. The purposed study uses FEM-based ABAQUS software to analyse the behaviour of square footing supported on geocell reinforced sands subjected to static vertical loading. Numerical analysis was performed to find the optimum combination of the different geometric parameters of the geocell reinforcement. Three distinct types of sands were employed in the study with relative densities of 30%, 50%, and 70%. The geometric parameters of the geocell, such as the placement depth of geocell (u), the width (b), and the height (h) of the geocell, were modified in relation to the footing width (B) to access the optimum combination ratios. The inclusion of the geocell reinforcement increases the load-carrying capacity up to 5-6 times compared to unreinforced sand. The results obtained from the numerical analysis were intended to correlate well with the experimental data available in the literature.

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“…From these studies, it can be concluded that the reinforced soil improves the UBC and reduces the foundation settlement. Recently, the effects of load eccentricity, inclination and combined effects of both eccentric and inclined loads on the UBC of shallow foundation located over reinforced and unreinforced sand bed have been studied experimentally, analytically and numerically by different investigators (Hjiaj [9], Kumar et al [11,12], Foye et al [6], Padmini et al [20], Loukidis et al [14], Latha and Somwanshi [13], Nazir and Azzam [17], Sawwaf and Nazir [26], Patra et al [23], Rabi Narayan Behera [3], Krabbenhoft, et al [10], Ornek [19], Badakhshan and Noorzad [1,2], Ganesh et al [7]). All researchers concluded that the value of UBC rises with increasing the number of geogrid reinforcing layers because the soil-reinforcement contains a series of interlocking cells that can keep the soil within its pockets and making an interlocking action between soil and geogrid.…”

Section: Introductionmentioning

confidence: 99%

Behaviour of eccentrically inclined loaded rectangular foundation on reinforced sand

Gupta

Mital

2021

Studia Geotechnica Et Mechanica

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This study presents the behaviour of model footing resting over unreinforced and reinforced sand bed under different loading conditions carried out experimentally. The parameters investigated in this study includes the number of reinforced layers (N = 0, 1, 2, 3, 4), embedment ratio (Df /B = 0, 0.5, 1.0), eccentric and inclined ratio (e/L, e/B = 0, 0.05, 0.10, 0.15) and (a = 0°, 7°, 14°). The test sand was reinforced with bi-axial geogrid (Bx20/20). The test results show that the ultimate bearing capacities decrease with axial eccentricity and inclination of applied loads. The test results also show that the depth of model footing increase zero to B (B = width of model footing), an increase of ultimate bearing capacity (UBC) approximated at 93%. Similarly, the multi-layered geogrid reinforced sand (N = 0 to 4) increases the UBC by about 75%. The bearing capacity ratio (BCR) of the model footing increases with an increasing load eccentricity to the core boundary of footing; if the load eccentricities increase continuity, the BCR decreases. The tilt of the model footing is increased by increasing the eccentricity and decreases with increasing the number of reinforcing layers.

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Improving the bearing capacity of footing on soft clay with sand pile with/without skirts

Cited by 33 publications

References 8 publications

An Experimental Study on Corex (Steel) Slag Reinforced with Terrazyme Treated Clay for Improvement of Soft Soil

An Experimental Study on Corex (Steel) Slag Reinforced with Terrazyme Treated Clay for Improvement of Soft Soil

Numerical Investigation of Square Footing Positioned on Geocell Reinforced Sand By Using Abaqus Software

Behaviour of eccentrically inclined loaded rectangular foundation on reinforced sand

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