Results 31 to 40 of about 100,828 (240)

Sensitivity of freezing and thawing influencing factors of pipeline foundation soils in permafrost region

open access: yesYou-qi chuyun, 2020
For the oil and gas pipeline operating in the permafrost regions, buckling deformation is usually caused by frost heaving and thaw settlement of the foundation soil, which affects the safety and stability of pipeline seriously.
Wei WANG   +5 more
doaj   +1 more source

Calculation method and analysis of horizontal frost heave effect of L-shaped retaining wall in permafrost regions

open access: yesRock and Soil Mechanics, 2022
In view of the imperfection of the calculation method of horizontal frost heaving force in the design of L-shaped retaining wall in permafrost area, based on the Lifkin foundation model and the cooperative deformation principle between retaining wall and
DONG Jian-hua   +4 more
doaj   +1 more source

Experimental Investigation on Frost Heaving Force (FHF) Evolution in Preflawed Rocks Exposed to Cyclic Freeze-Thaw Conditions

open access: yesGeofluids, 2021
This work is aimed at investigating the structural deterioration and the frost heaving force evolution characteristics of flawed rocks using a self-developed frost heaving force (FHF) measurement system. Three kinds of preflawed rocks with different flaw
Yu Wang   +4 more
doaj   +1 more source

Experimental analysis of horizontal frost heaving force of loess in Lanzhou City of Gansu Province Area

open access: yesZhongguo dizhi zaihai yu fangzhi xuebao, 2021
In order to study the variation of temperature field and horizontal frost heaving force during the one-dimensional freezing and melting process of loess with different water content, the one-dimensional freezing and melting test under closed system was ...
Zheng ZHANG, Xuening MA, Qiyou ZHU
doaj   +1 more source

Research in the Frost-heaving of Forest Road in Winter [PDF]

open access: yes, 1991
As a fundamental investigation for the maintenance of forest road surface in winter, we measured frost-heaving of forest road. We set 8 measure points and measured the frost-heaving height of each point at intervals of about 10 days from early in ...
井上, 裕, 井, 博道
core   +1 more source

Influence of Uneven Subgrade Frost Heave on Deformation and Damage of CRTSIII Slab Track

open access: yesApplied Sciences, 2023
The problem of uneven frost heave deformation of high-speed railway subgrade in seasonal freezing areas seriously affects the service state and service life of slab track structures and threatens the safe operation of high-speed vehicles.
Hongge Wang   +5 more
doaj   +1 more source

A Generalized Secondary Frost Heave Model

open access: yesSIAM Journal on Applied Mathematics, 1994
A generalized model for secondary frost heave is developed. Secondary frost heave arises during freezing owing to cryostatic suction effects that can increase the upward water permeation to facilitate ice-lens growth and increased heave. Nondimensionalization and scaling are used to simplify the model equations and to identify a dimensionless group ...
Fowler, A, Krantz, W
openaire   +3 more sources

A method of safety monitoring and measurement of overall frost heaving pressure of tunnel in seasonal frozen area

open access: yesApplied Rheology, 2023
Antifreeze design, scientific operation, and maintenance of tunnels with broken surrounding rock in seasonal frozen areas are key factors that affect the safety of tunnel.
Cui Guangyao, Xiong Yong
doaj   +1 more source

Secondary Frost Heave in Freezing Soils [PDF]

open access: yesSIAM Journal on Applied Mathematics, 1989
Summary: A mathematical model of secondary frost heave in freezing, gravelly soils is presented. This model is due to \textit{K. O'Neill} and \textit{R. D. Miller} [Water. Resour. Res., 21, 281-296 (1985)], who sought numerical solutions. Here, their model is made nondimensional and is analyzed using asymptotic analysis.
openaire   +2 more sources

Frost heaving pressure and characteristics of frost cracking in elliptical cavity (crack) of rock mass under coupled thermal-mechanical condition at low temperature

open access: yesYantu gongcheng xuebao, 2018
The frost heaving pressure is induced by water-ice phase transition in water-bearing cracks in addition to thermal stress at low temperature in rock engineering in cold regions.
HUANG Shi-bing 1,2, LIU Quan-sheng 3, LIU Yan-zhang 1, CHENG Ai-ping 1
doaj   +1 more source

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