Adfreeze Strength and Creep Behavior of Pile Foundations in Warming Permafrost

Aldaeef, Abdulghader A.; Rayhani, Mohammad T.

doi:10.1007/978-3-319-61642-1_20

Cited by 11 publications

(6 citation statements)

References 8 publications

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“…First, the concrete specimen was placed at the bottom of a specimen cell which had a height of 40 mm and an inner diameter of 61.8 mm. en, the tested soil was put into the cell above the concrete specimen and compacted to a target dry density of 1.68 g/cm 3 and a target height of 20 mm. Consequently, the concrete-soil specimen had a total height of 40 mm, and the concrete-soil interface was in the middle of the specimen and coincided with the shear plane of the shear box (Figures 1(a) and 1(b)).…”

Section: Test Materialsmentioning

confidence: 99%

“…e interface shear behaviors between concrete and frozen soil are significantly important for cold region engineering such as frost jacking of piles in seasonally frozen ground, stability of reinforced concrete gravity-retaining walls against sliding in seasonal soils, and concrete linings on compacted subgrade of canals to stop seepage losses. When the structures buried in the frozen soil are subjected to frostheave force or external load, the relative slip and destruction between the frozen soil and structures will occur, in which the tangential force between the frozen soil and the structure interface is called the adfreeze force [1][2][3]. In the process of external loading, the adfreeze force is variable and the maximum is known as adfreeze strength [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…e interface shear behaviors of the frozen soil-structure have been widely investigated using field tests [7][8][9][10][11][12], laboratory tests [3,6,[13][14][15][16][17], and numerical simulations or theoretical analyses [18][19][20][21]. Liu et al [14] investigated the shear behavior of frozen soil-concrete interface using a temperature-controlled direct shear test system, and their results showed that temperature and moisture content had a great effect on the peak shear strength but had little effect on the residual shear strength.…”

Section: Introductionmentioning

confidence: 99%

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Modeling of Concrete‐Frozen Soil Interface from Direct Shear Test Results

Xiong

et al. 2021

Advances in Civil Engineering

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The shear behaviors of concrete-frozen soil interface are important for analyzing the performance of engineering structures buried in the frozen ground. In this paper, a series of direct shear tests were carried out to determine the concrete-soil interface behaviors at different test temperatures (19°C, −1°C, −3°C, and −5°C) and initial water contents (9.2%, 13.1%, 17.1%, and 20.8%) of soils. The interface shear behaviors, including the shear stress versus horizontal displacement, interface cohesion, and interface friction coefficient, were analyzed based on the test results. Then, a simple, nonlinear model was proposed and verified for the interface shear behaviors. The results show that the effect of initial water content and test temperature on the interface shear behavior is significant, and the peak stress increases with the increasing initial water content and decreasing test temperature. The interface cohesion is sensitive to the test temperature and initial water content, while the interface friction coefficient is insensitive to both the factors. The parameters of the simple nonlinear model can be gained by back-analyzing the test results. The predictions made by the proposed model are found to be in good agreement with the experimental results.

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Section: Test Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling of Concrete‐Frozen Soil Interface from Direct Shear Test Results

Xiong

et al. 2021

Advances in Civil Engineering

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Section: Introductionmentioning

confidence: 99%

“…Although existing studies considered various factors that influence the adfreeze strength/ bearing capacity of piles in permafrost, only recently has research begun to investigate climate change on the performance of piles in permafrost (Aldaeef and Rayhani 2018;Hoeve and Fortin 2019;Tang et al 2019). Aldaeef and Rayhani (2018) evaluated the adfreeze strength and creep behavior of steel piles in warming permafrost (temperatures ranging from −3 to 0 °C) and illustrated that the pile in warm permafrost fail in brittle mode post-peak strength because of permafrost degradation. Tang et al (2019) investigated the axial loading behavior of laboratory concrete piles in permafrost silt and clay at a ground temperature of −1.10 to −2.35 °C and found that adfreeze strength had not been mobilized near the pile tip because the axial load transferred to the pile tip was insufficient.…”

Section: Introductionmentioning

confidence: 99%

Adfreeze Strength of Wooden Piles in Warm Permafrost Soil

et al. 2023

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In recent years, permafrost warming has adversely affected the performance of infrastructure projects existing in northern Canada. The common construction practice in these permafrost-underlain areas is to prefer the use of the pile foundation for building and infrastructure rather than using shallow foundations. Thus, the influence of warming permafrost on the loading capacity of pile foundations is critical for evaluating forthcoming changes under a warming climate. The present study was performed to assess the influence of temperature and loading rate on the adfreeze strength of piles in permafrost soil. A series of uniaxial compressive tests on wooden piles drilled into frozen soil were carried out at various temperatures, mimicking the conditions in warming permafrost. The results demonstrated that an increase in strain rate led to an increase in adfreeze strength of piles. Moreover, the wooden piles exhibited peak adfreeze strength at a displacement less than 2 mm for most temperature and deformation rate combinations. Interestingly, although the adfreeze strength of piles increased as temperatures cooled below −1 °C, a transition phase between −3 and −4.5 °C was observed in which the adfreeze strength decreased. It can be noted that failure occurred in the wooden piles at temperatures colder than −5 °C rather than frozen soil failure at these temperatures. These variations in adfreeze strength are related to soil temperature, unfrozen water content, and the adhesive bonds at the interface between the frozen soil and pile.

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