An experimental study and numerical modeling of laterally loaded regular and finned pile foundations in sandy soils

Albusoda, Bushra S.; Al-Saadi, Anmar F.; Jasim, Abbas F.

doi:10.1016/j.compgeo.2018.06.007

Cited by 28 publications

(4 citation statements)

References 10 publications

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“…In this study, the experimental laboratory test on the slope models, both the unreinforced and reinforced slope models were tested using the small-scale physical modeling method to investigate the bearing capacity of continuous footing. Regardless of the structure interaction problems that are more effective in prototype dimensions, small-scale physical modeling provides a low-cost approach that enables model observations of the soil compared to prototype testing [9]. The slope physical modeling is conducted on a steel container (1.5 × 1.0 × 1.0 m).…”

Section: Variable Of Specimens Codementioning

confidence: 99%

The Slope Stability of Sand Slope With Two Rows Pile Reinforcing

Munawir¹

2023

GEOMATE

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Population growth in Indonesia affects the rate of urbanization as the increased construction development decreases the available land. The issue of limited land encourages people to make settlements or buildings near the slope edge. Various mitigation methods can be applied to prevent and avoid landslides and to overcome other problems that arise on the slopes, one of which is by strengthening the slopes. In this study, slope reinforcement was carried out by adding two rows of piles to increase slope safety. Firstly, we observed scaled slope models with or without pile reinforcing. Slope modeling was done with a test container of sand soil with a slope angle of 50° and using an aluminum pipe as a model for reinforcement piles. Pile diameter of the test model was varied on the second row (1.5 cm, 2.0 cm, 2.5 cm, and 3.2 cm). The bearing capacity of the scaled-model test results was used to estimate the increase in factor of safety (FoS) assisted by the finite element method (FEM) application in two-dimensional (2D) and three-dimensional (3D) FEM. According to the FEM test results, the FoS value of a reinforced slope with two rows of piles increased by 9.130% in 2D FEM and 34.296% in 3D FEM compared to an unreinforced slope modeling. The most significant FoS value was found in the second row of piles with the largest diameter of 3.2 cm. Additionally, the test results showed that the reinforced slope is susceptible to rotational slope failure.

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Section: Variable Of Specimens Codementioning

confidence: 99%

The Slope Stability of Sand Slope With Two Rows Pile Reinforcing

Munawir¹

2023

GEOMATE

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“…According to previous research, a finned pile foundation is one of the proven innovative techniques [19] that aids the resistance of the static latera load [9][10][11][12][14][15][16][20][21][22], cyclic loads [23], and combined loads [13]; hence, the present study aims to quantify the seismic response of a 25-story building, with a shear-walls facility, supported with a conventionally piled-raft (RP-Mat). This study also attempted to reduce the seismic response of a similar building with the finned-pile mat system (FP-Mat), while numerically considering the soil-pile structure interaction by creating a SSI model using ABAQUS-CAE software.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Soil Structure Interaction of a High-Rise Building Resting over a Finned Pile Mat

Bariker

Kolathayar

2022

Infrastructures

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High-rise building safety is generally supported by pile-mat systems. They must be sturdy enough to withstand potential lateral loads brought on by earthquakes, wind, dredging, and machine vibrations, in addition to increased axial loads. An innovative piled-mat foundation system is required to deal with these impacts because standard pile foundation systems only have lateral capacities that are 10% of their axial capacities. This study aims to reduce the damage caused by seismic impacts on high-rise buildings using shear walls supported by piled mats, thereby minimizing vibrations within the structure. Compared with conventional pile systems, the finned-pile foundation is a proven method that can withstand a 65% to 80% higher lateral load; hence, a series of SSI analyses were performed on a 25-story high-rise building, with the shear wall resting on a finned-pile mat (FP-Mat), under a far-field earthquake excitation, using ABAQUS software. The seismic responses were studied by performing a time–history analysis on the FP-Mat, with varying fin-lengths (Lf) of 0.2Lp, 0.4Lp, 0.6Lp, and 0.8Lp, which was compared with an analysis of a conventional piled-mat (RP-Mat). The seismic responses for RP-Mat and FP-Mats were studied with peak-acceleration, maximum horizontal displacement, and inter-story drifts acting as the damage parameters. The provision of FP-Mats significantly reduced the vibrations and seismic effects on the building, and as the fin-length increased, the vibrations and seismic effects reduced further. The drifting bound was also reduced as the fin-length increased. The optimum fin-length for FP-Mats is suggested to be 0.6Lp in terms of seismic performance and construction efficiency. This study helps one understand the seismic behaviors of high-rise buildings resting on finned pile mats.

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“…Limit-analysis theory can also be used to study the ULC of pile groups. Zhou et al [21] proposed a design method for XCC pile groups in undrained clay. For a triangular composite foundation [22], a wide pile spacing can realize the best combination of pile groups, thus improving ULC.…”

Section: Introductionmentioning

confidence: 99%

Bearing Characteristics of Multi-Wing Pile Foundations under Lateral Loads in Dapeng Bay Silty Clay

Wang

Tang

et al. 2022

JMSE

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This study provides a theoretical basis for reinforcement of the soil around multi-wing piles. Limit analysis was used to determine the ultimate lateral capacity (ULC) of three- and four-wing piles in Dapeng Bay silty clay. The effects of the pile–soil interaction coefficient α, wing width Bw, and lateral-load direction β on the ULC of the pile and the shear plastic zone range of the surrounding soil were analyzed. The normalized ULC of the three-wing pile decreased when the wing–diameter ratio increased. When Bw was 0.15 m and α was 0.4, the ULC of the four-wing pile was 19% higher than that of the three-wing pile. As β increased, the normalized ULC of the four-wing pile decreased, whereas that of the three-wing pile went through a minimum at 30°. The size of the soil shear plastic ring did not depend on α for either pile type; it increased around the three-wing (but not the four-wing) pile with changes in β. However, there was also a double plastic ring of broken soil around the four-wing pile. The four-wing pile had a more symmetrical influence on the soil around the pile than the three-wing pile.

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An experimental study and numerical modeling of laterally loaded regular and finned pile foundations in sandy soils

Cited by 28 publications

References 10 publications

The Slope Stability of Sand Slope With Two Rows Pile Reinforcing

The Slope Stability of Sand Slope With Two Rows Pile Reinforcing

Dynamic Soil Structure Interaction of a High-Rise Building Resting over a Finned Pile Mat

Bearing Characteristics of Multi-Wing Pile Foundations under Lateral Loads in Dapeng Bay Silty Clay

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