Model experiment of uneven frost heave of airport pavement structure on coarse-grained soils foundation

Long, Xiaoyong; Cen, Guoping; Cai, Liangcai; Chen, Yue

doi:10.1016/j.conbuildmat.2018.08.100

Cited by 23 publications

(5 citation statements)

References 20 publications

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“…Guoluo Airport, which is located in Qinghai-Tibetan Plateau seasonal frozen soil region, was chosen as the research background and prototype in this paper [39]. e climate of Guoluo Airport is characterized by low air temperature (the annual average temperature is about −4°C), Abundant rainfall (snow) (the annual average precipitation is 400-760 mm, and the annual precipitation days are 118-175 days), long negative temperature period (even more than 8 months), large frozen depth (the maximum frozen depth is about 2.5 m), small cooling rate, and long retention time of freezing fronts in soil.…”

Section: Soil Samples Preparationmentioning

confidence: 99%

Experimental Research on Frost Heave Characteristics of Gravel Soil and Multifactor Regression Prediction

Long

Cen

Cai

et al. 2018

Advances in Materials Science and Engineering

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Gravel soil is usually considered to be insensitive to frost heave. However, many frost heave deformations of foundation in seasonal frozen region indicate that gravel soil may also produce frost heave under certain special conditions. In order to gain a deep insight into the frost heave characteristics of gravel soil, a series of laboratory experiments on one-dimensional frost heave were conducted under the open- and closed-water replenishing condition using an improved experiment apparatus. The influence of various factors including initial moisture content, clay content, compactness, overlying load, and water replenishing on frost-heaving ratio of gravel soil were analyzed. And the basic frost heave characteristics including frost heave amount, frost heave speed, frozen depth, freezing speed, and moisture content distribution after freezing in a gravel soil sample were analyzed. The corresponding mechanisms were also discussed. Results showed that in the open water replenishing condition, there exists a linear relationship between initial moisture content, overlying load, and frost-heaving ratio and a quadratic polynomial relationship between clay content, compactness, and frost-heaving ratio. Frost-heaving ratio in the open water replenishing condition can be found to increase over three times than that under the closed water replenishing condition. Multifactor regression empirical formula was obtained by multiple regression analysis to predict the frost-heaving ratio of gravel soil under certain collocation of factors and levels under the closed water replenishing condition. The significant effects on frost-heaving ratio were, in order, water replenishing > initial moisture content > clay content > compactness > overlying load.

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Section: Soil Samples Preparationmentioning

confidence: 99%

Experimental Research on Frost Heave Characteristics of Gravel Soil and Multifactor Regression Prediction

Long

Cen

Cai

et al. 2018

Advances in Materials Science and Engineering

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“…Coarse-grained soil (CGS in short) is a mixture of pebble, sand and clay, etc. [ 1 , 2 ], and is commonly used as a subgrade material in highway and railway engineering [ 3 , 4 , 5 ]. It is generally subjected to static or repeated dynamic load caused by transportation tools (vehicles and trains) [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

A New Creep–Fatigue Interaction Model for Predicting Deformation of Coarse-Grained Soil

Zhang

Rao

2022

Materials

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Studying the creep–fatigue interaction of the coarse-grained soil (CGS) is very important for safety assessment and disaster prevention in subgrade engineering. Current research work is mainly focused on single creep or fatigue deformation. In this paper, a new creep–fatigue interaction model is established to predict the creep–fatigue interaction deformation of different gradation CGS based on the rheological mechanics and the interactive relationship between creep and fatigue complex compliance method. Triaxial creep–fatigue interaction tests of different gradations CGS under different average stresses and frequencies were conducted to verify the new creep–fatigue interaction model. Research results show that for the creep–fatigue and fatigue–creep interaction, the fatigue deformation is always larger than the creep deformation under the same stress level. For the creep–fatigue multi-interaction, the second creep and fatigue deformation are always smaller than the first creep and fatigue deformation. The results of the triaxial creep–fatigue interaction tests verify the validity of this new model.

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“…For instance, Di Matteo et al [11] conducted four replications of the direct shear test by varied normal stresses (100, 150, 200 and 250 kPa) for 16 finegrained soil specimens and obtained 256 pairs (44) of effective cohesion (c') and effective friction angle (ϕ'), thus analyzing combinations of variables with geotechnical variability. These and others previously described methods present analysis of the mechanical properties of soils [12,13] including combination of the computational and laboratory based methods for determining deformation characteristics of the soil samples [14]. Series of the investigations [15][16][17][18] presented general rules of the frost heave in finely dispersed soils, methods of heave measuring, effects of frozen soils on the quality of buildings constructed in the extreme environmental and climate conditions.…”

Section: Introductionmentioning

confidence: 99%

Measuring Equivalent Cohesion C<sub>eq</sub> of the Frozen Soils by Compression Strength using Kriolab Equipment

Lemenkov¹,

Lemenkova

2021

Civil and Environmental Engineering Reports

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Current paper presents the results of the experimental analysis on permafrost uppermost soil samples with various physical properties (moisture, porosity) tested with varied external pressure and time. The aim of this work is to test properties of the soil samples intended for the construction of buildings, railways and objects of civil infrastructure by modeled external pressure, data visualization and analysis. Variations in the soil samples were studied by analysis of the equivalent soil cohesion (Ceq) in frozen soil samples. Methods include integrated application of the laboratory experiments, methods of the statistical data analysis and 3D plotting performed by the selected LaTeX packages. Laboratory experiments were performed using KrioLab equipment ‘Sharikovy Stamp PSH-1’. The 15 series of experiments have been tested. Models of the soil strength are graphically presented and statistically analyzed showing the results of the experiment.

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Model experiment of uneven frost heave of airport pavement structure on coarse-grained soils foundation

Cited by 23 publications

References 20 publications

Experimental Research on Frost Heave Characteristics of Gravel Soil and Multifactor Regression Prediction

Experimental Research on Frost Heave Characteristics of Gravel Soil and Multifactor Regression Prediction

A New Creep–Fatigue Interaction Model for Predicting Deformation of Coarse-Grained Soil

Measuring Equivalent Cohesion C<sub>eq</sub> of the Frozen Soils by Compression Strength using Kriolab Equipment

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