Experimental studies on model pile foundations reinforced by hard inclusions

Nuzhdin, Matvey; Nuzhdin, Leonid; Ponomaryov, Andrey

doi:10.1007/978-981-15-2184-3_24

Cited by 4 publications

(3 citation statements)

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“…The main existing types of structures and technologies used to prevent the degradation of permafrost soils at the base of buildings and structures were identified: ventilated undergrounds (including adjustable ones) [14], enclosing clips arranged in the base using various technologies along the contour of the building [15]; thermal stabilization of soils with the help of seasonally operating cooling devices (SOCD). Soil thermal stabilizers, otherwise called thermosiphons or seasonal cooling devices, have been successfully used since the 1960s [16,17,18].…”

Section: Use Of Seasonal Cooling Devicesmentioning

confidence: 99%

Прогноз Деформаций Основания И Снижения Несущей Способности Свайных Фундаментов В Криолитозоне

Nikiforova¹,

Коннов²

2022

IJCCSE

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В настоящее время по причине глобального потепления климата происходит деградация вечной мерзлоты. Усиливается деструктивное воздействие криогенных процессов на здания и сооружения в криолитозоне. Целью данной работы являлось прогнозирование в связи с изменением климата снижения несущей способности свайных фундаментов существующих зданий и вызванных этим деформаций основания из многолетнемерзлых грунтов. Были проведены численные исследования несущей способности свайных фундаментов и деформаций основания здания, возведенного в 80-х годах прошлого века в Норильске по I принципу строительства на многолетнемерзлых грунтах. Моделирование показало снижение несущей способности свай здания до 50% за 60 лет (начиная с 2000 г.). Определен срок, по истечении которого здание придет в аварийное состояние. Дана оценка эффективности применения сезонно-действующих охлаждающих устройств для обеспечения его эксплуатационной надежности.

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Section: Use Of Seasonal Cooling Devicesmentioning

confidence: 99%

Прогноз Деформаций Основания И Снижения Несущей Способности Свайных Фундаментов В Криолитозоне

Nikiforova¹,

Коннов²

2022

IJCCSE

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“…The term reinforcement stands for the strengthening of the soil by penetration into the soil mass of additional elements with higher strength properties and different shapes and materials. Cement grouting and vertical expanding geopolymers as a rigid inclusion have been studied by [ 1 , 2 , 5 , 6 , 7 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. A search for materials to be used for the soil’s strengthening is one of the most perspective directions from a sustainable engineering point of view since recycled materials can be applied [ 30 ].…”

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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“…Nuzhdin et al modeled vertical soil reinforcement with cement grouting in laboratory trays by using gravel workings as a hard inclusion [ 1 ]. Nascimento et al [ 2 ] described an experiment involving the application of sand columns within soft clays, which, besides reinforcement, played a role in drainage.…”

Section: Introductionmentioning

confidence: 99%

Settlement of Soil Reinforced with Vertical Fiberglass Micro-Piles

et al. 2022

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This article is dedicated to investigating the properties of soil after its reinforcement with fiberglass elements through large-scale laboratory plate-load tests of various samples that varied in the numbers and lengths of the reinforcing elements. The investigation of the vertical elements considered the diameter increase at the bottom toe by using widening washers. The results were compared relative to each other and to the theoretical calculation results. The theoretical calculations for the settlements were undertaken based on the authors’ proposed method. The method considers the number, shape, area and material of the strengthening elements using a pre-proposed reinforcement area factor µ. This pre-established factor was calculated with reference to the elements’ geometry—the diameter of the vertical elements and the bottom’s washer diameter—which determined the reinforcement area. A comparison between the reinforced and reference soft sandy soil samples indicated a 25% increase in the deformation modulus after the reinforcement process at a pressure of 25 kPa. Samples with µ ranging from 1.20 to 1.43 were 55–65% stiffer than samples with µ equal to 0.69 at a pressure of 100 kPa. The comparative analysis of the calculated results and the actual laboratory PLT test results was adequate for use for further development.

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Experimental studies on model pile foundations reinforced by hard inclusions

Cited by 4 publications

References 0 publications

Прогноз Деформаций Основания И Снижения Несущей Способности Свайных Фундаментов В Криолитозоне

Прогноз Деформаций Основания И Снижения Несущей Способности Свайных Фундаментов В Криолитозоне

Vertical Fiberglass Micropiles as Soil-Reinforcing Elements

Settlement of Soil Reinforced with Vertical Fiberglass Micro-Piles

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