Interface shear strength characteristics of steel piles in frozen clay under varying exposure temperature

Aldaeef, Abdulghader A.; Rayhani, Mohammad T.

doi:10.1016/j.sandf.2019.11.003

Cited by 20 publications

(5 citation statements)

References 23 publications

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“…As the pressure increases, the number of soil particles squeezed into the groove increases, improving the contact surface's non-uniformity. Related scholars have proposed the concepts of "critical roughness" and "ultimate roughness" when studying the effect of roughness on interface shear behavior [27][28][29]. However, due to the simplified sand-filling method used in the roughness setting in this experiment, it is no longer discussed.…”

Section: Interface Shear Strengthmentioning

confidence: 99%

Softening/Hardening Damage Model and Numerical Implementation of Seabed Silt-Steel Interface in Yellow River Underwater Delta

Peng

Liu

Geng

et al. 2023

JMSE

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The interaction between soil and structure is a research hotspot in ocean engineering, and the shear performance of interfaces is an essential factor affecting the bearing capacity of offshore structures. Taking the Yellow River Underwater Delta as the research area, the Softening/Hardening damage model of the silt–steel interface and the determination method of model parameters are proposed based on the statistical damage theory. Through the interface monotonic shear test under the conditions of different normal stress, roughness and water content, the shear mechanical properties and volumetric deformation laws on the silt–steel interface are analyzed, and the damage model parameters are obtained. Finally, a FRIC subroutine for the damage model was developed based on ABAQUS. The research results indicate the following: (1) The interface between silt and steel exhibits two characteristics, softening/hardening and shear shrinkage/expansion, under different conditions. Roughness significantly impacts interfacial cohesion, while water content mainly affects the internal friction angle. (2) The softening model based on the classic rock damage model can better simulate the stress–strain relationship of the silt–steel interface under high normal stress and low water content. In contrast, the hardening model based on the classic hyperbola model can better simulate the stress–strain relationship under low normal stress and high water content. The calculated results of the softening/hardening model agree with the experimental results, and the model has 7 parameters. (3) The developed FRIC subroutine can effectively simulate the nonlinear mechanical behavior of the interface between silt and steel. The research results provide a reference for exploring the stability analysis of offshore structures considering interface weakening effects.

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Section: Interface Shear Strengthmentioning

confidence: 99%

Softening/Hardening Damage Model and Numerical Implementation of Seabed Silt-Steel Interface in Yellow River Underwater Delta

Peng

Liu

Geng

et al. 2023

JMSE

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“…Thus, driven piles can be loaded sooner than other ones. However, the strength of permafrost will rarely allow the use of driving equipment, such as a vibratory hammer, and will likely cause the pile to be crushed [23,24].…”

Section: Steel Pipe Pilesmentioning

confidence: 99%

“…In Inuvik, both pile foundations and shallow foundations have traditionally been adopted for residential buildings. Geotechnical considerations (i.e., adfreeze strength, frost heave, and long-term creep settlement) were incorporated following recent studies, considering soil properties, temperature, and salinity [24][25][26][27]33,34].…”

Section: Design Manual and Case Study Of Screw Piles And Steel Pipe P...mentioning

confidence: 99%

Foundations in Permafrost of Northern Canada: Review of Geotechnical Considerations in Current Practice and Design Examples

Dourado,

Deng,

Chen

et al. 2024

Geotechnics

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In northern Canada where permafrost is prevalent, a persistent shortage of accessible, affordable, and high-quality housing has been ongoing for decades. The design of foundations in permafrost presents unique engineering challenges due to permafrost soil mechanics and the effects of climate change. There is no specific design code for pile or shallow foundations in northern Canada. Consequently, the design process heavily relies on the experience of Arctic engineers. To clearly document the current practice and provide guidance to engineers or professionals, a comprehensive review of the practice in foundation design in the Arctic would be necessary. The main objective of this paper is to provide an overview of the common foundations in permafrost and the geotechnical considerations adopted for building on frozen soils. This study conducted a review of current practices in deep and shallow foundations used in northern Canada. The review summarized the current methods for estimating key factors, including the adfreeze strength, creep settlement, and frost heave, used in foundation design in permafrost. To understand the geotechnical considerations in foundation design, this study carried out interviews with several engineers or professionals experienced in designing foundations in permafrost; the findings and the interviewees’ opinions were summarized. Lastly, in order to demonstrate the design methods obtained from the interviews and review, the paper presents two design examples where screw piles and steel pipe piles were designed to support a residential building in northern Canada, according to the current principles for adfreeze strength, long term creep settlement, and frost heave. The permafrost was assumed to be at −1.5 °C, and the design life span was assumed to be 50 years. The design examples suggested that for an axial load of 75 kN, a 12-m-long steel pipe pile or a 7-m-long screw pile would be needed.

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“…The influence of temperature on the UBC of pipe piles cannot be ignored [28,29]. Based on the finite element model described in Section 4.1, a thermal load is applied on the pile surface and soil surface to transfer the temperature along the depth of the soil to study the variation in the pipe pile bearing capacity under the action of temperature.…”

Section: Influence Of Temperaturementioning

confidence: 99%

Static Load Test and Numerical Analysis of Influencing Factors of the Ultimate Bearing Capacity of PHC Pipe Piles in Multilayer Soil

Zhang

Xu³

et al. 2021

Sustainability

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Prestressed high-strength concrete (PHC) pipe piles have been widely used in engineering fields in recent years; however, the influencing factors of their ultimate bearing capacity (UBC) in multilayer soil need to be further studied. In this paper, a static load test (SLT) and numerical analysis are performed to obtain the load transfer and key UBC factors of pipe piles. The results show that the UBC of the test pile is mainly provided by the pile shaft resistance (PSR), but the pile tip resistance (PTR) cannot be ignored. Many factors can change the UBC of pipe piles, but their effects are different. The UBC of the pipe pile is linearly related to the friction coefficient and the outer-to-inner diameter ratio. Changes in the pile length make the UBC increase sharply. Low temperatures can produce freezing stress at the pile–soil interface. The effect of changing the Young modulus of pile tip soil is relatively small.

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Interface shear strength characteristics of steel piles in frozen clay under varying exposure temperature

Cited by 20 publications

References 23 publications

Softening/Hardening Damage Model and Numerical Implementation of Seabed Silt-Steel Interface in Yellow River Underwater Delta

Softening/Hardening Damage Model and Numerical Implementation of Seabed Silt-Steel Interface in Yellow River Underwater Delta

Foundations in Permafrost of Northern Canada: Review of Geotechnical Considerations in Current Practice and Design Examples

Static Load Test and Numerical Analysis of Influencing Factors of the Ultimate Bearing Capacity of PHC Pipe Piles in Multilayer Soil

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