Polymer and Composite Piles. International and Russian Experience

Boyarintsev, A. V.

doi:10.1007/s11204-020-09686-9

Cited by 10 publications

(5 citation statements)

References 12 publications

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“…These materials have high bearing capacity, low specific gravity, low thermal conductivity and high corrosion resistance. There are developments related to the use of composites as the main material for piles [6,7]. Studies show [8,9] that the bearing capacity of such piles on the ground is comparable to that of concrete piles, and sometimes even higher.…”

Section: Introductionmentioning

confidence: 99%

Change in surface roughness of composite piles when pressing into the ground

Boyarintsev

Sukhov²,

Tumashevskaia³

2023

E3S Web Conf.

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The bearing capacity of piles on the ground is one of the main characteristics of pile foundations, which is responsible for its interaction with the ground. This characteristic depends on many factors: the granulometric composition of the soil, its moisture content, con-sistency, texture, as well as the type and properties of the pile material. One of the main charac-teristics of the pile material is its surface roughness. In many studies, the dependence of the angle of friction of the soil against the material of the pile on the value of the roughness of its surface was noted. At the same time, all studies focused exclusively on the dependence of the angle of friction on the roughness, not paying attention to the possibility of its variability in the process of driving the pile into the ground. This goal was set in the framework of this study. Using a standard single-plane cutter, the passage of a composite pile at a distance of 0.5m was simulated at a depth of 10 m. Before and after the test, the surface roughness parameters were measured using the Seitronic PSh8-1 SS device. The results showed that after the test, the roughness of the fiberglass plate made on the basis of polyester resin by the pultrusion method decreased by 44.4%.

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Section: Introductionmentioning

confidence: 99%

Change in surface roughness of composite piles when pressing into the ground

Boyarintsev

Sukhov²,

Tumashevskaia³

2023

E3S Web Conf.

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“…Таким образом, возможны ситуации, при которых, ввиду изменения шероховатости поверхности материала при погружении подземной конструкции, будет изменяться ее несущая способность в данных грунтах. Наиболее актуальным становится данный вопрос в свете того, что последние годы на строительных площадках все чаще начинают применяться полимеры: ПВХ шпунты [13-15], композитные сваи [16][17][18], сваи из переработанного пластика. Данные материалы отличаются от традиционных бетона и стали меньшей прочностью, жесткостью и плотностью, вследствие чего изменение их шероховатости может происходить с большей интенсивностью.…”

Section: Introductionunclassified

Experimental investigation of surface roughness changes of an underground structure's material during its driving into the ground

Boyarintsev,

Samohina

2023

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The mechanical interaction between dispersed soils and the surface of underground structures is fundamental in generating their load-bearing capacity. The technical and economic efficiency of piles and supporting structures depends on the friction forces that appear on the contact of their material with the soil. One of the main factors which has a significant influence on friction forces is the roughness of the material surface. Installation of underground structures, such as pile driving or vibro-driven sheet piling, is accompanied by long periods of material contact with dispersed soils: some structural segments can slip on the soil for tens of metres. As a result, it is likely that the surface properties of the underground structure material will change during this process. Although there is a considerable amount of tribological research, the methodology of such experiments does not fully represent the pile driving process in the soil mass. This means that it is not possible to accurately estimate the change in the surface properties of underground structure materials as they are driven into the soil using the results of these studies. The present paper describes a simulation of an underground structure made of three different materials: steel, fibreglass and fluoroplastic; in fine medium sand. The roughness of the materials was monitored while they were moving in the sand. It was found that with increasing diving depth the roughness of each material becomes less. And the value of this change is influenced by such material properties as material density, shear strength and hardness.

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“…However, the cost-effectiveness of this approach is not achieved immediately, as shown in Figure 1 ; The high strength and low density of fiberglass,

is equal to 690 MPa, and

is equal to 1600 kg/m 3 , providing evidence of the future trend of FRP application growth; Low density leads to cost reduction in transportation. Boyarintsev investigates the application of fiberglass in permafrost areas [ 33 ]; Less labor and light equipment are required for implementation and ease of installation to the ground; A relatively high thermal conductivity factor of 0.3–0.6 W/K·m; Fiberglass does not allow electric contact with the ground. This benefit can be used for lightweight thin-walled steel profiles researched by Nazmeeva and Garifullin [ 34 , 35 ] since the foundation’s electric corrosion influence is eliminated; Mohajerani [ 8 ] studied the life cycle of fiberglass piles exposed to severe conditions produced by Bedford technology.…”

Section: Introductionmentioning

confidence: 99%

“…Low density leads to cost reduction in transportation. Boyarintsev investigates the application of fiberglass in permafrost areas [ 33 ];…”

Section: Introductionmentioning

confidence: 99%

Vertical Fiberglass Micropiles as Soil-Reinforcing Elements

et al. 2022

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This article is dedicated to developing a ground improvement technique using vertically oriented reinforcement elements prefabricated utilizing fiberglass pultruded pipe and helical shape wideners at the bottom toe. Structures of the prefabricated helical micropiles varied by the length and cross-section area introduced into the soil massive as reinforcing bearing elements. The effect of the reinforcements geometry variation was investigated through a reinforcement factor (µ), based on which a calculation method for measuring settlement of reinforced soil has been previously developed Full-scale field plate load tests were performed before and after reinforcing the soil to investigate the changes in the soil stiffness after the reinforcement process. Comparative analysis between the reinforced and reference soft sandy soil indicates an average increase in the deformation properties of the fiber reinforced soils by 8%, 30%, 63% at the applied pressures of 100, 300, and 550 kPa, respectively. The influence of the fiber reinforced polymers (FRP) geometrical properties on the final composite settlement was determined. A comparative analysis of the calculated and the actual plate load tests results reveals that the previously proposed settlement calculation method is adequate for further development.

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Polymer and Composite Piles. International and Russian Experience

Cited by 10 publications

References 12 publications

Change in surface roughness of composite piles when pressing into the ground

Change in surface roughness of composite piles when pressing into the ground

Experimental investigation of surface roughness changes of an underground structure's material during its driving into the ground

Vertical Fiberglass Micropiles as Soil-Reinforcing Elements

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