Vertical vibration capacity of a single pile in dry sand

Fattah, Mohammed Y.; Zbar, Bushra S.; Mustafa, Faris S.

doi:10.1080/1064119x.2017.1294219

Cited by 15 publications

(8 citation statements)

References 14 publications

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“…The dynamic response of cast in-situ reinforced concrete batter piles and pile groups constructed in the silty sand investigated through field tests was presented in [3]. In the study [4], the dynamic response of pile foundations in dry sandy soil excited by two opposite rotary machines was considered experimentally. Another experimental study on vertical batter piles and pile groups under uplift load conditions in non-cohesive sub-soil was presented last year in [5].…”

Section: у статті викладено основні положення спільної роботи з основ...mentioning

confidence: 99%

Features of the combined impact of driven compaction piles and the associated subsoils

Плахотний¹,

Чернєва²

2023

СТМРБ

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The article describes the main features of the combined impact of the driven compaction piles and the associated soil strata. The compaction piles can be pyramidal, machine-driven, or self-expanding when being driven. The peculiarities of the nature of work related to the compaction of the soil strata when the piles are driven. The compaction of the soil strata provides the additional load-bearing capacity and supports the transferred external load. Subsoils and the quantitative assessment of their building properties are evaluated based on the nature and inherent conditions of earth strata formations, and mineralogical and salt compositions. Changes to the fore-said properties depend on the degree of humidity, the peculiarities of soil structure, the location of individual particles, and the resistance to external loads. Internal resistance to compaction is determined by the bulk density of dry soil ρd during the deformation. The abnormalities related to the working of the subsoils associated with driven compaction piles correlate to the transfer of the external load by the lateral surface of the piles to the pre-compacted soil during the course of immersion. In the case of machine-driven batter piles, a compacted soil core between the inner edges of the surfaces of the elements acts in tandem with the pile. In this scenario, the density of the soil composition reaches its maximum value. The results of the field tests proved, that self-opening batter piles perceive 1.2-1.3 times more resistance than pyramidal ones of the same volume. The use of driven compaction piles does not apply to foundations composed of permafrost soils, unstable landslide areas, and to undermined areas. The practice of introducing compaction-driven piles into construction has shown significant savings in building materials, and a reduction in the construction time of residential, public, and industrial buildings.

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Section: у статті викладено основні положення спільної роботи з основ...mentioning

confidence: 99%

Features of the combined impact of driven compaction piles and the associated subsoils

Плахотний¹,

Чернєва²

2023

СТМРБ

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“…The dynamic reactions of the two foundations also became less apparent as the distance between them increased, whereas the response of the second foundation seemed more apparent if the first foundation was subjected to greater loads [7]. Fattah, et al (2017) studied experimentally the dynamic response of pile foundations in dry sandy soils stirred with two opposite rotating machines. All tests were carried out in medium-density fine sandy soil with a relative density of 60%.…”

Section: Introductionmentioning

confidence: 99%

“…The main focus of this study was to evaluate the effects of pure vertical vibration caused by two opposite rotating devices on the resistance capacity of a stable pile foundation in clean and dry sandy soil. The reduction in the final load was small as compared to the initial static load before the machines were started (no more than 10%) [8]. Al-Ezzi and Zakaria (2019) presented an experimental study on the dynamic response of a rectangular foundation under the influence of the dynamic load resulting from a neighbouring base called 'the source of vibration'.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response of Pile Foundation Subjected to Different Frequencies in Sandy Soil

Mohammed,

A. Zakaria

2024

DJES

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This research presents an experimental study of the dynamic response of pile foundation as a result of the vibration of a nearby foundation as a source of dynamic load in sandy soil with relative density of 85%. The experiments were conducted on dry and soaked state of soil. The pile raft consisted of a pile cap with dimensions of (100 x 100 x 10) mm, connected with four solid steel piles with a slenderness ratio of 30 and pile diameter is 8 mm, and the machine foundation (vibration source) with dimensions (80 x 80 x 40) mm. After having completed the soil layers preparation inside a steel container with suitable dimensions is used, the machine that generated vibration was operated by the rotating mass, as this vibration reached the pile raft. The results showed that the displacement amplitude, acceleration, velocity and settlement of the pile raft decreased with increasing distance with the vibration source (from 0.5B to 2B) for the three frequencies (10,15 and 20) Hz, while the decrease for displacement was (48%,23.83% and 42.48%) respectively in the dry state of soil. On the other hand, the decrease for displacement was (37%, 23.16% and 46.27%) in the soaked state of soil. Regarding acceleration, it was decreased to (29.66%, 45.79% and 40.38%) respectively in the dry and (100%, 21.88% and 34.04%) in the soaked state of soil. Furthermore, the velocity reached (45.38%, 42.96% and 38.18%) respectively in the dry and (54.05%, 11% and 28%) in the soaked state of soil, the settlement was (63.82%, 52.1% and 38.18%) respectively.

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“…1. Based on the results of many previous studies and design experience [26][27][28][29][30][31], a laminar shear box was used in this test to effectively reduce the influence of the boundary effect. Its length, width, and depth were 0.95 m, 0.85 m, and 0.75 m, respectively.…”

Section: Introductionmentioning

confidence: 99%

Performance of a Subgrade-Embankment-Seawall System Reinforced by Drainage PCC Piles and Ordinary Piles Subjected to Lateral Spreading

Chen

Wang

et al. 2023

Geofluids

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Coral sand is widely distributed in coastal areas and used as a soil foundation in an increasing number of projects. Historical records show that the liquefaction and lateral spreading of coral sand foundations occurred many times during earthquakes, resulting in serious geological and engineering disasters. Based on a rigid drainage pile, a PCC pile (Large Diameter Pipe Pile by using Cast-in-place Concrete) and drainage body are innovatively combined into a new drainage PCC pile, to reduce the harm caused by liquefaction and lateral spreading of the coral sand foundation. In this study, the seismic response of the subgrade-embankment-seawall system on the coral sand liquefaction site was simulated using a shaking table. The excess pore water pressure ratio, acceleration, average foundation settlement, seawall displacement, embankment deformation, and pile body bending moment of the ordinary pile foundation and new drainage PCC pile foundation under seismic loads of PGA peak ground acceleration = 0.05 g , PGA = 0.1 g , and PGA = 0.2 g on the coral sand site were analyzed and compared. Compared with ordinary pile foundations, the excess pore water pressure ratio, pile bending moment, seawall displacement, foundation settlement, and embankment deformation of the new drainage PCC pile foundation were markedly reduced, while acceleration increased, which showed that the new drainage PCC pile had a positive anti-liquefaction effect on the coral sand foundation.

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Vertical vibration capacity of a single pile in dry sand

Cited by 15 publications

References 14 publications

Features of the combined impact of driven compaction piles and the associated subsoils

Features of the combined impact of driven compaction piles and the associated subsoils

Dynamic Response of Pile Foundation Subjected to Different Frequencies in Sandy Soil

Performance of a Subgrade-Embankment-Seawall System Reinforced by Drainage PCC Piles and Ordinary Piles Subjected to Lateral Spreading

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