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.

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.

scholarly journals Numerical Simulation Analysis of Hydrothermal Change of Subgrade by Seepage Drainage Geogrid Under the Effect of Asphalt Mixture Freeze-Thaw Action

2021 ◽  
Author(s):  
Fang Wang
Keyword(s):  
Numerical Simulation ◽  
Model Test ◽  
Simulation Analysis ◽  
Asphalt Mixture ◽  
Frozen Soil ◽  
Experimental Comparison ◽  
Freeze Thaw ◽  
Subgrade Soil ◽  
Seasonal Frozen Soil ◽  
Drainage Effect

In seasonal frozen soil area, the engineering problems caused by the excessive moisture content of the subgrade soil are widespread. In view of this phenomenon, author proposes to employ a new type of research and development of the seepage drainage geogrid (SDG) to cool and drain the soil. Through indoor model test, after two freeze-thaw cycles, the experimental comparison of the size and laying method of various SDG was carried out. The test result shows that the model with a natural grit layer has the most drainage effect. While, the model contains two layers of interconnected grilles has the best cooling effect. The indoor model test is simulated by accurate numerical simulation. The simulation results are compared with the indoor test results. The fitting results of the two results are very high, which provides theoretical support and data guarantee for the application of seepage drainage grille to strengthen the roadbed in the cold road.

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.

scholarly journals A Coupled Thermo-Hydromechanical Model of Soil Slope in Seasonally Frozen Regions under Freeze-Thaw Action

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Yongxiang Zhan ◽  
Zheng Lu ◽  
Hailin Yao ◽  
Shaohua Xian
Keyword(s):  
Coupling Model ◽  
Frozen Soil ◽  
Frost Heave ◽  
Freezing Process ◽  
Water Migration ◽  
Soil Slope ◽  
Deep Soil ◽  
Melting Front ◽  
Freeze Thaw ◽  
Seasonally Frozen Regions

Soil slope diseases in seasonally frozen regions are mostly related to water migration and frost heave deformation of the soil. Based on the partial differential equation defined using the COMSOL Multiphysics software, a thermo-hydromechanical coupling model considering water migration, ice-water phase change, ice impedance, and frost heave is constructed, and the variations in the temperature field, migration of liquid water, accumulation of solid ice, and deformation of frost heave in frozen soil slopes are analysed. The results show that the ambient temperature has a significant effect on the temperature and moisture field of the slope in the shallow area. In addition, the degree of influence gradually weakens from the outside to the inside of the slope, and the number of freeze-thaw cycles in deep soil is less than that in shallow soil. During the freezing period, water in the unfrozen area rapidly migrates to the frozen area, and the total moisture content abruptly changes at the vicinity of the freezing front. The maximum frozen depth is the largest at the slope top and the smallest at the slope foot. During the melting period, water is enriched at the melting front with the frozen layer melting; the slope is prone to shallow instability at this stage. The melting of the frozen layer is bidirectional, so the duration of slope melting is shorter than that of the freezing process. The slope displacement is closely related to the change in temperature—a relation that is in agreement with the phenomenon of thermal expansion and contraction in unfrozen areas and reflects the phenomenon of frost heave and thaw settlement in frozen areas.

The Study on Water Conservancy Project Control System

2012 ◽  
Vol 170-173 ◽  
pp. 1996-1999
Author(s):  
Cen Wen
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Model Test ◽  
Control Automation ◽  
Intellectual Control ◽  
Multi Agent ◽  
Project Model ◽  
Water Conservancy Project ◽  
Water Conservancy

This paper puts the theory of Multi-Agent into control automation, setting up a Automatic Control System of Water Conservancy Project Model based on Multi-Agent, applying Multi-Agent theory to Automatic Control System of Water Conservancy Project Model Test, and coordinating and solving a great deal of problems that exists in Automatic Control System at present through the communication among a lot of Agents, which will offer very important basis and advanced scientific means for Water Conservancy Project Model Test implementing intellectual control of real meaning.

Correlation Analysis on Frost Heaving Ratio of Subgrade Soil and Plasticity Index under Freeze-Thaw Cycles

2011 ◽  
Vol 255-260 ◽  
pp. 1171-1175 ◽  
Author(s):  
Han Bing Liu ◽  
Jing Wang ◽  
Chun Li Wu ◽  
Kai Feng
Keyword(s):  
Correlation Analysis ◽  
Closed System ◽  
Frozen Soil ◽  
Plasticity Index ◽  
Frost Heaving ◽  
Freeze Thaw ◽  
Subgrade Soils ◽  
Nonlinear Fitting ◽  
Subgrade Soil ◽  
The Relationship

Three kinds of subgrade soils with different plasticity index are selected from seasonally frozen soil region. Frost heaving ratio of volume and height was performed on the samples exposed to 0 to 8 times closed-system freeze-thaw cycles. The results show that concerning the same kind of soil, the frost heaving ratio increases with the number of freeze-thaw cycles; Frost heaving ratio increases with plasticity index under the same number of freeze-thaw cycles. Multiple nonlinear fitting is adopted for test data. The relationship between frost heaving ratio and plasticity index, freeze-thaw cycles is obtained and shows a good correlation. The relation can provide useful reference for subgrade design and construction in seasonally frozen soil region.

Experimental Research on Shear Strength of Subgrade Soil and Plasticity Index under Different Freeze-Thaw Cycles

2012 ◽  
Vol 256-259 ◽  
pp. 43-47
Author(s):  
Jing Wang ◽  
Xiao Long Qu ◽  
Chun Li Wu ◽  
Yi Ming Xiang
Keyword(s):  
Shear Strength ◽  
Triaxial Compression ◽  
Confining Pressure ◽  
Frozen Soil ◽  
Plasticity Index ◽  
Freeze Thaw ◽  
Subgrade Soils ◽  
Nonlinear Fitting ◽  
Confining Pressures ◽  
Seasonal Frozen Soil

Three different plasticity index subgrade soils are selected from seasonal frozen soil area. Triaxial compression test under different confining pressures are executed on the samples exposed to 0 to 7 times closed-system freeze-thaw cycles. The conclusion gotten is that to the same kind of soil under the same freeze-thaw cycles, the shear strength increases with confining pressure; Shear strength with the same confining pressure decreases with the number of freeze-thaw cycles; With the same confining pressure and the same freeze-thaw cycles, shear strength increases with the plasticity index. Exponential function is adopted for multiple nonlinear fitting on the test results. The relationship between shear strength and confining pressure, plasticity index, freeze-thaw cycles is obtained and shows a good correlation.

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