Frost Heave of Irrigation Canals in Seasonal Frozen Regions

Xu, Jian; Wang, Qinze; Ding, Jiulong; Li, Yanfeng; Wang, Songhe

doi:10.1155/2019/2367635

Cited by 8 publications

(5 citation statements)

References 30 publications

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“…Measure 1 is to install an insulation board [ 70 , 71 ] with a thickness of 0.1 m at a depth of about 0.5 m below the pavement. The insulation board has a good thermal insulation performance, which can effectively block penetration of the freezing front so as to reduce the frost depth of the subgrade, thereby weakening the frost heave effect.…”

Section: Results and Analysismentioning

confidence: 99%

A Freezing-Thawing Damage Characterization Method for Highway Subgrade in Seasonally Frozen Regions Based on Thermal-Hydraulic-Mechanical Coupling Model

Deng

Liu

Zeng

et al. 2021

Sensors

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Seasonally frozen soil where uneven freeze–thaw damage is a major cause of highway deterioration has attracted increased attention in China with the rapid development of infrastructure projects. Based on Darcy’s law of unsaturated soil seepage and heat conduction, the thermal–hydraulic–mechanical (THM) coupling model is established considering a variety of effects (i.e., ice–water phase transition, convective heat transfer, and ice blocking effect), and then the numerical solution of thermal–hydraulic fields of subgrade can be obtained. Then, a new concept, namely degree of freeze–thaw damage, is proposed by using the standard deviation of the ice content of subgrade during the annual freeze–thaw cycle. To analyze the freeze–thaw characteristics of highway subgrade, the model is applied in the monitored section of the Golmud to Nagqu portion of China National Highway G109. The results show that: (1) The hydrothermal field of subgrade has an obvious sunny–shady slopes effect, and its transverse distribution is not symmetrical; (2) the freeze–thaw damage area of subgrade obviously decreased under the insulation board measure; (3) under the combined anti-frost measures, the maximum frost heave amount of subgrade is significantly reduced. This study will provide references for the design of highway subgrades in seasonally frozen soil areas.

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Section: Results and Analysismentioning

confidence: 99%

A Freezing-Thawing Damage Characterization Method for Highway Subgrade in Seasonally Frozen Regions Based on Thermal-Hydraulic-Mechanical Coupling Model

Deng

Liu

Zeng

et al. 2021

Sensors

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show abstract

“…e values of c 1 , c 2 , c 3 , and c 4 in the formula are shown in Table 7. By substituting formulas (3) and (4) and formula (2) into formula (2) and formula (1), respectively, a model can be obtained for normal frost-heave force that comprehensively considers the influence of dry density, water content, and freezing temperature. (P 3 + P 6 + P 9 )/3 (P 3 + P 5 + P 7 )/3 (P 1 + P 5 + P 9 )/3 R K max − K min (in this column) K max − K min (in this column) K max − K min (in this column) In order to verify the rationality of the model, three groups of experiments were conducted with different water contents, dry densities, and temperatures, and three parallel experiments were conducted in each group.…”

Section: Forecasting Model Of Frost-heavementioning

confidence: 99%

“…Construction in loess areas suffers from major problems due to freezing damage [1][2][3][4]. A lack of scientific guidance on frostheave force in the design of structures such as foundations, subgrade, tunnels, culverts, artificial freezing support, and other projects means that they experienced different degrees of deformation and cracking and even structural failure due to excessive frost-heave force in the soil mass, leading to serious security issues and causing great economic loss [5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Normal Frost-Heave Force Generated from Loess upon Freezing considering Multiple Factors

Zhao

Wang

Jin

et al. 2019

Advances in Materials Science and Engineering

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An experimental study on the normal frost-heave force generated by loess was conducted by subjecting loess with various water contents and densities to different temperature conditions. e experimental results show that the interaction of the three factors has a significant effect on the normal frost-heaving force. Normal frost-heave force increases exponentially with an increase in dry density and linearly with a reduction in the freezing temperature or an increase in water content; of these factors, dry density has the greatest influence on frost-heave force, followed by water content then temperature. A frost-heave force model is developed that includes overall consideration of the interactions of water content, density, and temperature based on fitting of the test results. e value calculated with the model is in good agreement with values measured in verification tests, indicating that the model has high accuracy and can provide scientific guidance for engineering design in loess areas.

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“…China has approximately 4.5 million km of various water transfer canals, but the utilization coefficient of canal water is relatively low [1]. Canals in northern China are particularly susceptible to damage by the harsh natural environment, resulting in hidden dangers to the stable operation of the canals [2,3], as shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Volume Changes and Mechanical Properties of Expansive Mudstone below Canals under Wet-Dry/Wet-Dry-Freeze-Thaw Cycles

Zhu

Huang

Song

et al. 2021

Advances in Civil Engineering

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The complex environment in northern China is the main reason for degradation of expansive mudstone below the canals, which resulted in instability and damage of canal slopes. In this study, a serial of laboratory tests was conducted to explore the volume changes and mechanical behaviors of expansive mudstone below the canals in Xinjiang. The experimental program includes wet-dry (WD) and wet-dry-freeze-thaw (WDFT) tests, volume measurement, and unconfined compression tests. The test results show that during the WD cycles, the volume changes of expansive mudstones with a higher dry range would be more significant. The freeze-thaw process in the WDFT cycles resulted in a decrease of volume change ranges when the expansive mudstones had a relatively smaller dry range and a slight increase of volume change ranges when the expansive mudstones had a relatively larger dry range. In the meantime, the stress-strain relationships of expansive mudstones with different dry ranges all presented strain softening under the cycles of WD or WDFT. The first cycle resulted in a significant decrease of failure strength. After seven WD/WDFT cycles, the failure strength of expansive mudstones with different dry ranges decreased by 37.2%∼59.1%. In addition, the freeze-thaw process in the WDFT cycles promoted the softening of the stress-strain relationships and aggravated the failure strength attenuation of expansive mudstones. Through this study, we expect to provide a preliminary basis for the construction and maintenance of expansive mudstone canals in Xinjiang.

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Frost Heave of Irrigation Canals in Seasonal Frozen Regions

Cited by 8 publications

References 30 publications

A Freezing-Thawing Damage Characterization Method for Highway Subgrade in Seasonally Frozen Regions Based on Thermal-Hydraulic-Mechanical Coupling Model

A Freezing-Thawing Damage Characterization Method for Highway Subgrade in Seasonally Frozen Regions Based on Thermal-Hydraulic-Mechanical Coupling Model

Experimental Study on Normal Frost-Heave Force Generated from Loess upon Freezing considering Multiple Factors

Volume Changes and Mechanical Properties of Expansive Mudstone below Canals under Wet-Dry/Wet-Dry-Freeze-Thaw Cycles

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