scholarly journals A Study of the Insulation Mechanism and Anti-Frost Heave Effects of Polystyrene Boards in Seasonal Frozen Soil

Water ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 979 ◽  
Author(s):  
Fuqiang Guo ◽  
Haibin Shi ◽  
Manjin Cheng ◽  
Wenhui Gao ◽  
Hongzhi Yang ◽  
...  
Keyword(s):  
Precast Concrete ◽  
Reduction Rate ◽  
Frozen Soil ◽  
Frost Heave ◽  
Test Field ◽  
Frost Heaving ◽  
Irrigation Area ◽  
Ground Temperatures ◽  
Seasonal Frozen Soil ◽  
Hetao Irrigation Area

The damages resulting from frost heaving are the main causes of channel destruction in seasonal frozen soil regions. Over the years, many experimental studies have been performed regarding the channel anti-frost heaving in the Hetao irrigation area. However, there have been few experimental research studies conducted regarding the insulation and anti-frost heave effects of polystyrene boards (EPS) of different thicknesses. Therefore, in order to explore the insulation mechanism and anti-frost heave effects of precast EPS laid under the conditions of different thicknesses, an anti-frost heave test field was established in the Hetao irrigation area for the examination of the ground temperatures, frozen depths, frost heave amounts, and water content change rules. This study’s results showed that, for the laid EPS with thicknesses between 2 and 12 cm, the frost-heave reduction rate ranged from 53.2% to 92.6%; total accumulated temperature warming ranged from 248.65% to 565.93%; and the frozen depth reduction rate was between 59.8% and 75.9%. It was determined that the EPS per cm additions could effectively improve the ground temperatures at a buried depth of 30 cm by 0.78 °C, and reduce the frozen depth by 10.1 cm. Then, by comprehensively considering the positive economic and insulation effects, it was determined that the most appropriate thickness of the EPS laid under the precast concrete slabs in the Hetao irrigation area of Inner Mongolia was 8–10 cm.

Discussion on Moisture Migration and Law of Frost Heave of Seasonal Frozen Soil in Hetao Irrigation Area, Inner Mongolia

2012 ◽  
Vol 212-213 ◽  
pp. 260-263
Author(s):  
Ying Hao Wang ◽  
Shuo Li
Keyword(s):  
Inner Mongolia ◽  
Frozen Soil ◽  
Frost Heave ◽  
Moisture Migration ◽  
Irrigation Area ◽  
Irrigation Channel ◽  
Thaw Cycle ◽  
Channel Engineering ◽  
Seasonal Frozen Soil ◽  
Hetao Irrigation Area

Hetao irrigation area in Inner Mongolia is one of the four major irrigation areas in China, seasonal frozen soil is widely distributed in this area. Irrigation channel engineering experiences seriously freeze-thaw cycle many times in the long winter, its maintenance is the important and difficult point all long in irrigation channel engineering of Hetao irrigation area. For this, we analyze the moisture migration and law of frost heave characteristics of seasonal frozen soil in Hetao irrigation area.

Field Monitoring and Analysis of Hydraulic Soil Slope Frost Heaving Damage

2013 ◽  
Vol 353-356 ◽  
pp. 2445-2449
Author(s):  
Xiang Min Qu ◽  
Hua Zhong ◽  
Xiu Fen Wang ◽  
Bin Zhang
Keyword(s):  
Theoretical Basis ◽  
Frozen Soil ◽  
Frost Heave ◽  
Engineering Practice ◽  
Soil Slope ◽  
Frost Heaving ◽  
Seasonal Frozen Soil ◽  
Water Conservancy Project ◽  
Water Conservancy ◽  
Earth Temperature

Frost heaving damage of water conservancy project is widespread. In order to research the failure problems of hydraulic soil slope in dark seasonal frozen soil region, remote monitor and manual observation is carried out combined with field test section layout, which including air temperature, earth temperature, frozen depth, the amount of frost heaving and layered water content. It is researched that the rule of frost heave parameters variation and the damage of soil slope during freeze-thaw cycling. That offers theoretical basis and reference for construction of water conservancy project and guidance for engineering practice.

Research on Frost Heaving of Subgrade Filling in Seasonal Frozen Soil Area

2014 ◽  
Vol 1065-1069 ◽  
pp. 783-787
Author(s):  
Jin Fang Hou ◽  
Rui Qi Zhang ◽  
Jian Yu
Keyword(s):  
Water Content ◽  
High Speed ◽  
Freezing Temperature ◽  
Frozen Soil ◽  
Coarse Grained ◽  
Freezing And Thawing ◽  
Frost Heaving ◽  
Factors Affecting ◽  
Seasonal Frozen Soil ◽  
Soil Area

Research on frost heaving of high speed railway subgrade filling in seasonal frozen soil area is developed indoor. Through freezing and thawing strength and frost heaving amount test, the research analyzes factors affecting frost heaving of subgrade filling, points out that water content, fine stuff admixing amount and plasticity of fine-grained soil have relatively large influence on frost heaving, while freezing temperature and freezing and thawing cycle index have relatively small influence. Water content is main factor to have effect on frost heaving of subgrade filling. When the water content reaches to some certain value, even coarse-grained soil can produce considerable frost heaving amount. Therefore, taking effective waterproof and drainage measures is of great importance in subgrade frost heaving prevention and treatment.

Detailed observations on the nature of frost heaving at a field scale

1989 ◽  
Vol 26 (2) ◽  
pp. 306-312 ◽  
Author(s):  
M. W. Smith ◽  
D. E. Patterson
Keyword(s):  
Frozen Soil ◽  
Frost Heave ◽  
Field Scale ◽  
Frost Heaving ◽  
Moisture Movement ◽  
Ice Accumulation ◽  
Thermodynamic Conditions ◽  
Soil Strain ◽  
Detailed Picture ◽  
Complex Manner

Observations made using a system of ring magnets have provided a detailed picture of differential soil strain associated with frost heaving at a field scale. The results reveal the evolution of heave as freezing advances through the soil and the variation of soil strain with depth and time, and with soil temperature conditions. The results indicate that soil strain characteristically continues within frozen soil, sustained, it is proposed, by continuing water migration into the frozen soil. Consequently a considerable thickness of frozen soil appears to be actively involved with moisture movement and ice accumulation during frost heaving. The observations support the view that frost heave generally depends in a complex manner on the thermodynamic conditions of temperature and water and ice pressures as they are modified by the rheological properties of the soil. Key words: frost heave, differential soil strain, frost heave measurement.

scholarly journals A study of the insulating and anti-frost heave effects of polystyrene boards under molded bag concrete conditions

Water Policy ◽  
2021 ◽  
Author(s):  
Fuqiang Guo ◽  
Gangtie Li ◽  
Manjin Cheng
Keyword(s):  
Bending Moment ◽  
Frost Heave ◽  
Experimental Investigations ◽  
Frost Heaving ◽  
In Situ Test ◽  
Soil Temperatures ◽  
Channel Slope ◽  
Accumulated Temperature ◽  
Hetao Irrigation Area

Abstract In this study, the channel frost heaving actions in the Hetao irrigation area of Inner Mongolia were examined and a field in-situ test platform was established. Then, experimental investigations were conducted regarding the insulating and anti-freeze effects of polystyrene boards under the conditions of concrete bags with different thicknesses. In this study's experiments, concrete bags with different thicknesses were set, along with a test block of polystyrene boards with different thicknesses. The research results showed that by adding 2–5 cm molded bags, the total accumulated temperature increased in the range of 3.93–9.22% and the frost heave rate decreased by between 18.28 and 55.44% concrete, on the basis of 10 cm molded bag concrete. In addition, when 4–8 cm polystyrene boards were laid, the total accumulated temperature increased by 207.63–272.25%, and the frost heave rate decreased by between 71.43 and 96.6%. The absolute slope of the curve fitting of the frost heave rates and the soil temperatures decreased by 44.6–58.7%. HIGHLIGHT The results show that, the biggest bending moment of channel slope is in the 1/3 of canal slope, the biggest shear is in the toe of slope, the biggest bending moment of canal bottom is in the 1/2 of the Canal bottom. According to the judgment of Typical Channel, frost heaving damage will occur on the slope and bottom of the South Branch Canal without taking insulation measures.

scholarly journals Analysis of main points of channel freezing-thawing disease in cold region and influence of channel base soil on the disease

2021 ◽  
Vol 329 ◽  
pp. 01090
Author(s):  
Liqing Liang
Keyword(s):  
North China ◽  
Hydraulic Structure ◽  
Research Direction ◽  
Frozen Soil ◽  
Frost Heave ◽  
Cold Region ◽  
Freezing And Thawing ◽  
Cold Regions ◽  
Seasonal Frozen Soil ◽  
Base Soil

The frozen soil area in China is more than two thirds of the total territory, so the problem of frost heave is obvious. Especially in northeast, northwest, north China and other cold regions, the problem of frost heave of hydraulic structures is very common. Canal is a common hydraulic structure in agricultural water, which is affected by seasonal frozen soil and may cause problems such as lining damage, seepage and irrigation efficiency. Therefore, this paper mainly summarizes the necessity of research on channel freezingthawing damage, the research direction of channel freezing-thawing damage, and expounds the influence of seasonal frozen soil on freezing and thawing diseases in cold regions by taking the particle size of saturated soil based on channel as an example.

Interaction of a Single Pile with Freezing Heaving Soil

2020 ◽  
pp. 48-52
Author(s):  
Andrei Alekseev
Keyword(s):  
Normal Pressure ◽  
Frozen Soil ◽  
Frost Heave ◽  
Single Pile ◽  
Adhesion Forces ◽  
Frost Heaving

The article is devoted to the study of the interaction of a single pile with freezing heaving soil. The calculation of the pile loading area by the normal pressure of frost heaving is proposed. The cases of pile behavior under the influence of frost heave on it depending on the value of the heave pressure, the freezing forces of the frozen soil and the pile, and the adhesion forces of the anchored part of the pile are considered. The calculation of the radius of the cylinder shifting under the action of soil heaving is given.

Research on Hydraulic Soil Slope Frost Heaving Damage Model Test

2012 ◽  
Vol 256-259 ◽  
pp. 422-426
Author(s):  
Hua Zhong ◽  
Xiu Fen Wang ◽  
Bin Zhang
Keyword(s):  
Model Test ◽  
Damage Model ◽  
Frozen Soil ◽  
Laboratory Model ◽  
Soil Slope ◽  
Frost Heaving ◽  
Freeze Thaw ◽  
Seasonal Frozen Soil ◽  
Water Conservancy Project ◽  
Water Conservancy

Frost heaving damage of water conservancy project is widespread. In order to research the failure problems of hydraulic soil slope in dark seasonal frozen soil region, laboratory model test is carried out combined with field test section practical situation, which is the prototype of this model test. It is researched that the rule of frost heave parameters variation and the damage of soil slope during freeze-thaw cycling. That offers theoretical basis and reference for construction of water conservancy project, which will mitigate the effect and damage of freeze-thaw on hydraulic soil slope stability.

Research on Water Migration Characteristics of Hydraulic Soil Slope during Freeze-Thaw Process

2013 ◽  
Vol 353-356 ◽  
pp. 2595-2599
Author(s):  
Xiu Fen Wang ◽  
Hua Zhong ◽  
Bin Zhang
Keyword(s):  
Theoretical Basis ◽  
Principal Factor ◽  
Frozen Soil ◽  
Engineering Practice ◽  
Water Migration ◽  
Soil Slope ◽  
Frost Heaving ◽  
Seasonal Frozen Soil ◽  
Water Conservancy Project ◽  
Water Conservancy

Frost heaving damage of water conservancy project is widespread. Water migration is the principal factor, which influences the frost heaving characteristics of soil. In order to research the failure problems of hydraulic soil slope in dark seasonal frozen soil region, the layered water content is observed. It is researched that the rule of water migration characteristics. That offers theoretical basis and reference for construction of water conservancy project and guidance for engineering practice.

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