Behavior of Single Micropile Under Different Lateral Load Rates

Al-Neami, Mohammed A.; Baqir, Husam H.; Hameed, Saif H.

doi:10.30684/etj.v39i2a.654

Cited by 7 publications

(6 citation statements)

References 1 publication

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“…This behavior may be referred to the fact that the increase in the length of the pile is no longer effective under the same loading and soil conditions so that the thrust of lateral soil resistance against applied lateral loads did not increase at the same rate that occurred between embedment ratios of 20 and 25. This result agreed with findings of [23][24].…”

Section: The Effect Of Embedded Ratio (L/d) On the Load-deflection Curve Of Group Pile (1x2)supporting

confidence: 94%

Effect of Embedment and Spacing Ratios on the Response of Lateral Load of Single and Group Piles

Al-Neami¹,

Al-Dahlaki²,

Chalob³

2021

ETJ

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This paper displays an experimental work of three-scale model tests of single pile and nine-scale model tests of group pile (1x2) with spacing to diameter (S/D) ratios (2,4, and 6) respectively. The pile models inserted in the medium-dense dry sand with a relative density of 60% and different length to diameter (L/D) ratios (15, 25, and 30) were subjected to the lateral load with a rate of 2.5 mm/min. The test results present the effect of the change of the ratio of (L/D) and (S/D) on lateral displacements at the head of the pile. For single and group piles when the embedment ratio (L/D) increases, the ultimate lateral load increases also for group piles. When the (S/D) ratio increases, the ultimate lateral load increases. However, for (L/D) equal to 20, this increment is not linear with spacing increment, where a slight increment is observed of the relatively close pile and vice versa. While for other (L/D) ratios the increment of pile load is increased linearly with spacing increase.

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Section: The Effect Of Embedded Ratio (L/d) On the Load-deflection Curve Of Group Pile (1x2)supporting

confidence: 94%

Effect of Embedment and Spacing Ratios on the Response of Lateral Load of Single and Group Piles

Al-Neami¹,

Al-Dahlaki²,

Chalob³

2021

ETJ

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“…Therefore, the group load capacity also increased. This is in agreement with Hazzar et al [2], Rahil et al [3], and Al-Neami et al [13], which reported that the ultimate load increased as the relative density of sand increased.…”

Section: The Influence Of Relative Density Of Sandsupporting

confidence: 92%

A Numerical Analysis on Pullout Capacity of Batter Pile Groups in Sandy Soil

Al-Tememy¹,

Al-Neami²,

Asswad³

2022

ETJ

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 The pullout capacity of a batter pile group attains maximum value at a 20° batter angle  Batter piles have a higher lateral load resistance than vertical piles.  The pullout load capacity of groups increases with the increase in the embedment ratio  Pullout capacity of vertical and batter piles improves significantly with increasing RD  The negative batter pile group has more load capacity than the positive batter pile group Batter piles or raker piles are the piles driven in the soil at an inclination with the vertical to resist inclined forces or large lateral loads. Battered piles are widely utilized to support offshore buildings, towers, and bridges since these structures are risky due to the exposure to overturning moments resulting from winds, waves, and ship impact. This paper used a three-dimensional finite element analysis using PLAXIS 3D software to study the effect of several variables that affect the behavior of batter piles in a group under pullout loads. The study is conducted on a steel pipe pile model embedded in a dry sandy soil with three different relative densities (loose, medium, and dense sand) at different inclination angles and three embedment ratios L/D of 25, 37.5, and 50, respectively. The finite element model was carried out on a pile group of 2×1 with different configurations. The numerical results indicated that for all pile configurations, the pullout capacity of the batter pile group increased when the embedded ratio and relative density increased, and the maximum value was attained at a 20° batter angle. Furthermore, batter pile groups with BB (group with two battered piles) configuration of (-20°, +20°) gave a high resistance to the pullout load compared to other configurations of the pile group. In addition, pile Groups with battered piles marked the resistance to the pullout load more than pile groups that contain only the vertical piles.

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“…Increasing cyclic load amplitudes caused the wall's horizontal displacement to increase; this is what was inferred from Figure 9, where all the tests were performed with a frequency of 2 Hz for the cyclic load and (0.5 H) for distances between the railway track and the retaining wall on loose, medium, and dense sand. These results were in accordance with [29,30], where the soil lateral displacement caused by active lateral earth pressure on the wall increases as the dynamic load amplitude does.…”

Section: Effect Of Dynamic Load Amplitudesupporting

confidence: 88%

Dynamic displacement of sheet pile walls adjacent to the railway track

Naji,

Al-Neami,

Mahmood

2024

ETJ

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Behavior of Single Micropile Under Different Lateral Load Rates

Cited by 7 publications

References 1 publication

Effect of Embedment and Spacing Ratios on the Response of Lateral Load of Single and Group Piles

Effect of Embedment and Spacing Ratios on the Response of Lateral Load of Single and Group Piles

A Numerical Analysis on Pullout Capacity of Batter Pile Groups in Sandy Soil

Dynamic displacement of sheet pile walls adjacent to the railway track

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