Small-scale experimental investigation on the behaviour of nailed slab system in expansive soil

Diana, Willis; Hardiyatmo, Hary Christady; Suhendro, Bambang

doi:10.1063/1.4958493

Cited by 3 publications

(4 citation statements)

References 8 publications

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“…This was because the columns were still constructed in the active zone. The column acts as a floating-pile in which the soil-column interaction is only mechanically improved, but the heave remains during swelling (Muntohar, 2014, Diana et al, 2016. Upon clay wetting, vertical-swelling pressure was developed that had a tendency to push the foundation upward and therefore, retracted the micropiles from the surrounding sand (Nusier and Alawneh, 2004).…”

Section: Elapsed Time (Minutes)mentioning

confidence: 99%

“…The lime column, which is moistened with water, will react more rapidly than the column that is not moistened (Abiodun and Nalbantoglu, 2015;Puppala & Pedarla, 2017). When the columns are applied to support an upper structure, such as pavement, the system can be modeled as a piled-flexible plate (Core and Siddiqui, 2013;Diana et al, 2016;Puri, 2017;Huang et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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The Behavior of the Flexible Plate – Supported with SiCC-Mortar Column on Expansive Soil

Muntohar¹,

Diana²,

Tafalas³

et al. 2020

IJTech

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This paper provides the test results of the load-deformation test on a flexible plate, supported and unsupported by SiCC mortar columns in the laboratory setting. Two columns types were used in this experiment, a circular column (O-shape) and a column with head enlargement (Tshape). The main purpose of this study was to examine the heave of flexible plate due to the swelling effect and modulus of subgrade reaction under a loading-unloading cycle. The expansive soil was put into a testing container with a diameter and height of 550 mm and 1000 mm respectively. The clay thickness was 700 mm and the sand layer was compacted to 200 mm at the bottom of the container. The column diameter (Dc) was 50.8 mm (2 in.), and had a length of 500 mm. The height and diameter of the column head were enlarged to three times the column diameter (3Dc), which was about 152.4 mm (6 in.). Loading tests were performed after 8 days of saturation and 14 days of curing the column. The test results showed that installation of the column in support of the plate reduced the heave to about 16% and 22% respectively for the O-shape and T-shape column-support plates. The T-shape column-strengthened plate can enhance the modulus of subgrade reaction to about 203%. This result indicated significant improvement by the enlarged column head in carrying and transmitting the load to the soil.

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Section: Elapsed Time (Minutes)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Behavior of the Flexible Plate – Supported with SiCC-Mortar Column on Expansive Soil

Muntohar¹,

Diana²,

Tafalas³

et al. 2020

IJTech

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“…Uji skala penuh akibat beban horizontal pada lempung lunak telah dilakukan Puri (2019). Uji model pada lempung ekspansif telah dilakukan oleh Taa (2010) dan Diana et al (2016Diana et al ( , 2017, serta pada gambut oleh Waruwu et al (2017). Selain itu, juga telah dilakukan studi analisis (Hardiyatmo, 2008(Hardiyatmo, , 2009(Hardiyatmo, , dan 2011, dan analisis numerik menggunakan pendekatan Beam on Elastic Foundation (Hardiyatmo, 2011;Puri et al 2011b;2012a;2012b;2013a;2013b;2013c;2015a;2015b;Puri, 2017) serta analisis metode elemen hingga sistem pelat terpaku tiang tunggal (Dewi, 2009), dan model skala kecil pelat terpaku dengan tiga dan satu baris tiang (Puri et al 2013a;Somantri, 2013), serta model skala penuh pelat terpaku dengan tiga baris tiang (Puri, 2015a;Puri et al 2013dPuri et al , 2014 dan 1 baris tiang (Puri, 2015a(Puri, , 2015b2015c ;Puri et al 2017Puri et al , 2019aPuri et al , 2019b.…”

Section: Pendahuluanunclassified

Analisis Numerik Perkerasan Sistem Pelat Terpaku Tiang Tunggal menggunakan Tiang Pipa Baja pada Tanah Lunak

Puri

2020

MKTS

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All of the full-scale tests and numerical analysis of Nailed-slab System from previous researchers used massive reinforced concrete piles. This research will study the possibility of steel pipe pile as a replacement of massive reinforced concrete piles if there are available enough steel pipe piles. This research is aimed to study the behavior of single steel pipe pile Nailed-slab System on soft clay and the influence of pile length due to slab deflection and soil stresses. It was used the data from Puri (2015a) for a single massive reinforced concrete pile Nailed-slab. This massive reinforced concrete pile was replaced by a single steel pipe pile with similar and varied diameter which analyzed by the 2D finite element method. Results show that the steel pipe pile can be used as a “nail” at the Nailed-slab pavement system but by a larger dimension compared to the massive reinforced concrete pile. The maximum effective shear stress in soil did not reach undrained shear strength under a standard wheel load 40 kN. Generally, the soil was not failure.

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“…1 illustrates the nailed slab system prototype. Although some research has been carried out on the nailed system on soft clay [12] and the influence on pile length on slab movement reduction on expansive soil have been studied [13], the mechanism by which this system on expansive soil has not been established, hence the performance nailed slab system in expansive soil need to explore.…”

Section: Introductionmentioning

confidence: 99%

Effect of Pile Connections on the Performance of the Nailed Slab System on the Expansive Soil

Diana¹

2017

GEOMATE

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Expansive soils are clay that swells and shrinks with changing moisture content. The pavement that constructed on these soils is subjected to large uplifting forces caused by swelling. Hence, there is an imperative need to counteract the problem posed by these soils by devising innovative pavement technique. An attempt to develop a simple, easy to install and cost-effective alternative pavement system, nailed slab system was developed, wherein slab pavement will be connected to a reinforced concrete mini piles.This research examines the emerging role of mini piles in the context of reducing soil uplift movement and the nailed slab system (pile supporting slab pavement) a system for minimizing slab movement due to swelling in expansive soil by conducting small-scale experimental modeling in laboratories. The heave prediction also doing by using the correlation between change in moisture content and vertical strain from oedometer test data. The results of this study indicate that reinforcing the soil by using the mini piles can reduce heave of soil, and the nailed slab system experiencing smaller upward movement than an unsupported slab. The connection between the pile and the slab has a significant effect on the system's ability to withstand the upward movement of expansive soil. When pile and the slab were monolithically connected, the system shows the better performance than those the slabs with the free head pile. Thereafter a heave prediction analysis provided the amount of heave that slightly overestimates, but still good enough for a rough estimation.

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Small-scale experimental investigation on the behaviour of nailed slab system in expansive soil

Cited by 3 publications

References 8 publications

The Behavior of the Flexible Plate – Supported with SiCC-Mortar Column on Expansive Soil

The Behavior of the Flexible Plate – Supported with SiCC-Mortar Column on Expansive Soil

Analisis Numerik Perkerasan Sistem Pelat Terpaku Tiang Tunggal menggunakan Tiang Pipa Baja pada Tanah Lunak

Effect of Pile Connections on the Performance of the Nailed Slab System on the Expansive Soil

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