Article
Construction & Building Technology
Di Wu, Changming Wang, Hailiang Liu, Xiaoyang Liu
Summary: Volcanic ash is a suitable replacement for traditional fill materials in subgrade construction, promoting resource preservation and sustainable development. This study investigated the mechanical behavior of compacted volcanic ash during freeze-thaw cycles and found that the mechanical degradation of volcanic ash is primarily caused by the loss of inter-particle bonding forces. The results provide empirical formulations to describe the relationship between mechanical parameters of volcanic ash and the number of freeze-thaw cycles and water content, offering guidance for projects involving volcanic ash as a potential building material in seasonally frozen regions.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Energy & Fuels
Jing Wu, Yani Lu, Kaibin Wang, Yang Cai, Cong Xiao
Summary: Triaxial compression tests were conducted on sandstone specimens in cold regions to study the combined effects of freeze-thaw cycles and chemical corrosion. The increase in freeze-thaw cycles led to the deterioration of mechanical properties, especially under the action of strong acid solution. Confining pressure also played an important role in the rock mechanical properties.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2023)
Article
Metallurgy & Metallurgical Engineering
Jie-xi Feng, Zhong-ming He, Chao Huang, Zheng-fu Liu, Tang-xin Xie
Summary: The evaluation of deformation behavior (MR and PD) of subgrade clay under deviatoric stress, confining pressure, moisture content, loading cycles, and freeze-thaw (FT) cycles was investigated in this study through repeated triaxial load tests. The results showed that the influence of FT cycles on MR and PD was significant, with the largest damage observed in the first FT cycle and a stable trend in the sixth FT cycle. MR decreased and PD increased rapidly during the first 2000 loading cycles. An evolution model for PD was proposed and validated, considering deviator stress, confining pressure, moisture content, loading cycles, and FT cycles. The findings contribute to a better understanding of the deformation behavior of subgrade clay under FT cycles.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2023)
Article
Environmental Sciences
Dan Wang, En-long Liu, Cheng-song Yang, You-qian Liu, Sheng-xian Zhu, Qi-hao Yu
Summary: As a widely-applied engineering material in cold regions, frozen subgrade soils are influenced by seismic loading and freeze-thaw cycles. Dynamic cyclic triaxial experiments were conducted to explore the effects of freeze-thaw cycles on the mechanical properties of frozen subgrade clay. The results showed that the dynamic stress-strain curves and dynamic volumetric strain curves of frozen clay became significantly sparse after 20 freeze-thaw cycles, and the cyclic number at failure reduced by 89% at a low ratio of the dynamic stress amplitude. Furthermore, the axial accumulative strain, residual deformation, and damage variable increased, while the dynamic resilient modulus and strength decreased with increasing freeze-thaw cycles.
JOURNAL OF MOUNTAIN SCIENCE
(2023)
Article
Engineering, Geological
Li Wei, Shouxi Chai, Meiling Xue, Pei Wang, Fang Li
Summary: Freeze-thaw cycling damages the soil structure and degrades its shear performance. Fiber reinforcement changes the stress-strain behavior and failure pattern of soil, resulting in better shear performance and freeze-thaw durability for fiber-lime-soil compared to lime-soil.
GEOTEXTILES AND GEOMEMBRANES
(2022)
Article
Engineering, Environmental
Fang Zheng, Shengjun Shao, Songhe Wang
Summary: The study found that freeze-thaw cycles lead to a temporary decrease followed by stabilization in the shear strength of recompacted loess, with varying effects based on different b-values. Freeze-thaw has minimal impact on the shear strength parameters, with cohesion decreasing and internal friction angle remaining relatively stable.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Geological
Jianguo Lin, Weilie Zou, Zhong Han, Ziwei Zhang, Xiequn Wang
Summary: This study investigates the evolution of a compacted clay's structural, volumetric, and water retention behaviors during soaking and desiccation, considering the influences of freeze-thaw cycles and saline intrusion. The results show that both freeze-thaw cycles and saline intrusion significantly affect the clay's microstructure and water retention characteristics. FT-induced cracks reduce the clay's swelling and shrinkage potentials, while salinization suppresses the clay's swelling and alters its water retention properties.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2022)
Article
Geochemistry & Geophysics
Chengju Li, Jiaxu Jin, Pengfei Wu, Beibei Xu
Summary: Tailings dams in cold regions experience freeze-thaw cycles, which have a significant impact on the mechanical properties and pore structure of tailings. Optimal moisture content falls between 10%-15%, and shear strength increases under higher confining pressures but decreases after more freeze-thaw cycles. The Grey Model prediction shows high accuracy in predicting the shear strength of tailings.
Article
Chemistry, Multidisciplinary
Shurui Zhang, Xin Xu, Xiaoqiang Dong, Haomin Lei, Xun Sun
Summary: This study investigated the mechanical properties and microstructure of dispersed soils in western Jilin Province under freeze-thaw cycles. The research findings indicate that freeze-thaw action resulted in particle fragmentation, increased soil porosity, and elevated crack content, thereby contributing to soil structure deterioration and strength reduction.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Environmental
Jinfeng Li, Huie Chen, Xiang Gao, Qi Ding, WenChong Shan, Haotian Guo, Jinpeng Zhuo
Summary: Desiccation crack is a significant factor contributing to engineering and environmental disasters. This study conducted tests on lean clay samples with different dryness degrees under wet-dry (WD) cycles and wet-dry-freeze-thaw (WDFT) cycles to analyze crack formation and development. The results show that the crack ratio and width decrease with higher dryness degree under consecutive WD cycles, while samples subjected to WDFT cycles exhibit higher crack ratio and wider cracks. Under lower dryness degree, the crack ratio and width remain relatively unchanged after each WD cycle, mainly consisting of small, shallow, and densely distributed sub-cracks. The research findings provide valuable insights into soil crack evolution and its mechanisms under complex environmental conditions.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Civil
Shukai Cheng, Qing Wang, Huicheng Fu, Jiaqi Wang, Yan Han, Jiejie Shen, Sen Lin
Summary: This paper investigated the mechanical properties of saline soil under freeze-thaw cycles through tests and established a modified model. The results showed an increase in volumetric strain and a decrease in shear strength with an increase in freeze-thaw cycle numbers. The modified double yield surface model considering freeze-thaw cycle effects was consistent with measured values, demonstrating its applicability to saline soil.
GEOMECHANICS AND ENGINEERING
(2021)
Article
Engineering, Geological
Arunodi Abeyrathne, Chathurika Jayasundara, Susanga Costa, Jayantha Kodikara
Summary: The coexistence of air and water in void spaces in unsaturated soils makes its mechanical behavior complex, and understanding the behavior patterns of unsaturated soils is crucial. This study evaluates the deviatoric behavior of compacted unsaturated soils in q - v(w) - p space, and finds a critical state surface for compacted unsaturated soils in this space.
Article
Geosciences, Multidisciplinary
Anshun Zhang, Junhui Zhang, Junhui Peng, Chao Huang, Chao Zhou
Summary: This study investigates the influence of freeze-thaw cycles on the mechanical properties of embankment clay and proposes an innovative method for obtaining shear strength rapidly. The results show that freeze-thaw cycles cause changes in strain curves, weakening of elastic modulus, and gradual reduction of failure strength. The cohesion is damaged initially but remains constant after a certain number of cycles, while the internal friction angle is not sensitive to freeze-thaw cycles.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Construction & Building Technology
Weihang Chen, Shujun Qu, Luobin Lin, Qiang Luo, Tengfei Wang
Summary: An approach using fly ash-amended soil with lignin reinforcement for industrial applications in cold regions is presented. Predictive models for soil shear strength were developed based on two ensemble learning algorithms, demonstrating the potential of ensemble methods to tackle regression and prediction issues in civil engineering. The XGBoost-based model consistently outperforms the RF-based model in terms of accuracy and generalization capabilities.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Engineering, Civil
Xiaoqiang Liu, Jiankun Liu, Yahu Tian, Yupeng Shen, Dan Chang
Summary: This study investigates the mechanical properties of subgrade filler after freeze-thaw cycles and examines the influence of test factors. The results show that water distribution and volume expansion are the main factors affecting the mechanical properties during freeze-thaw cycles.
KSCE JOURNAL OF CIVIL ENGINEERING
(2023)
Article
Engineering, Environmental
Mikael Schlumpf, Jordy Hendrikx, John Stormont, Ryan Webb
Summary: The formation of wet-snow slab avalanches is related to the liquid water content and strength of the snow layers. However, current studies disagree on this relationship and there is limited understanding of snow layers with a saturation level of θ=7% and above.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
William R. Jacobson
Summary: This study investigates the kinematics of deformation in debris bands associated with an overdeepened basin in Iceland. The research reveals the presence of multiple fabric types, suggesting a complex deformation history. Furthermore, pure shear-dominated strain was observed in an ice-free sediment ridge on the glacier surface.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Shanpeng Cao, Caichu Xia, Shuwei Zhou, Yao Zhang
Summary: Precise evaluation of frost heaving force and surrounding rock plastic zone is crucial for preventing freezing damage in cold-region tunnels. This paper presents a new elastoplastic solution for tunnel frost heaving force considering double non-uniform frost heave and intermediate principal stress, which can better guide the frost resistance design of tunnels in cold regions.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Sina Niazi, Aimane Najmeddine, Maryam Shakiba
Summary: This study investigates the mechanical response and damage of asphalt concrete under freezing temperatures. A coupled thermo-hydro-mechanical constitutive framework is proposed and validated through simulations and experiments. The effects of microstructural constituents on the mechanical response are also studied through parametric analysis.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Shi-chun Cai, Xiao-hua Yang, Fei Ye
Summary: A calculation method based on the Winkler foundation model is proposed for analyzing the stress and deformation in excavation support structures in seasonally frozen soil regions. The method considers various factors and has been validated to exhibit good applicability.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Guanjun Wei, Chuanjin Lei, Maoning Gao, Hongyu Zhou, Xin Li, Chaoyue Zhang
Summary: This study introduces a novel approach to improve the accuracy of deformation prediction in frozen soil areas by integrating post-processing deformation from InSAR with a frost heave model using the EnKF assimilation algorithm. Experimental results show that this approach reduces the RMSE to 0.247 mm, indicating its high feasibility and practicality.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Cheng Xu, Yugui Yang, Shanshan Hou, Hui Zhang, Chenxiang Li
Summary: This study investigates the properties and characteristics of frozen loess through nuclear magnetic resonance (NMR) tests and flexural tests. The results show that as the temperature decreases, the pore ice content in frozen loess rapidly increases, making the phase transition of residual unfrozen water difficult. The flexural strength, toughness, and roughness of the fracture surface of frozen loess vary under different freezing temperatures and water content conditions.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Jianguo Lu, Wansheng Pei, Mingyi Zhang, Xusheng Wan, Jiacheng Zhang, Yindong Wang
Summary: This paper investigates the effects of freeze-thaw cycles and salt erosion on the mechanical and microstructural properties of concrete modified with nano-TiO2 and nano-SiO2. The results show that the added nanoparticles and environment media significantly influence the overall performance of concrete samples. The SCF has the greatest influence on degradation, and the compressive strength of NS-modified concrete is lower than that of NT-modified concrete. The optimal nanoparticles ratios for NS and NT modified concretes are 1% and 2%, respectively. Furthermore, NS modification leads to better filling effect on pore structure and larger crystals on the concrete surface compared to NT modification. In the first 90 freeze-thaw cycles, the gel micro-pores increase while the macro-pores decrease, but this trend reverses within the 90-150 cycles. This research provides important insights into the erosion and frost resistance of nano-concretes in marine and cold region engineering.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Florian McLelland, Floris van Breugel
Summary: In this study, a proof-of-concept approach for automatically assessing qualitative aspects of snow type while skiing using strain sensors is explored. The algorithm developed achieves a 97% accuracy in correctly assigning qualitative labels to different segments of a skiing trajectory. This method has the potential for improving quantitative characterization of ski performance, providing snow-specific recommendations, and developing skis with automated stiffness tuning based on snow type.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Purushottam Kumar Garg, Aparna Shukla, Mohd. Farooq Azam
Summary: This study remotely investigates 25 well-distributed glaciers in the western Himalaya and finds that these glaciers were in an overall retreating phase from 1990 to 2015. The study also reveals changes in glacier dynamics before and after 2000, including reduced terminus retreat and deglaciation rates, increased surface velocity, and the presence of more glacial lakes and supraglacial debris. The study highlights the importance of topography and local surface conditions in the heterogeneity of glacier response to climate.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Junru Chen, Shuna Feng, Lang Jia, Jiagui Hou, Miles Dyck, Xiaobin Li, Qingbai Wu, Hailong He
Summary: The heat pulse method is commonly used to measure thermal properties of frozen soil, snow, or glaciers, but the phase change caused by ice melting affects the measurement accuracy. This study observed the thermal response of ice under different heating strategies and compared numerical simulations and analytical solutions. The results showed that optimizing phase change parameters improved accuracy and the numerical method effectively improved the calculation accuracy of ice thermal conductivity.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Kazuma Fukui, Chiemi Iba
Summary: By studying the evolution of pore water pressure in brick walls during cyclic freezing and thawing, we found that the water pressure in a south facing wall increases significantly during the night in cold regions. Incomplete freeze-thaw cycles are more damaging to building materials than a monotonous repetition of complete freezing and thawing.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Yasir A. Malik, Norbert Karpen, Elmar Bonaccurso, Ilia Roisman, Jeanette Hussong, Philippe Villedieu
Summary: This study quantitatively analyzes the accretion and shedding phenomena caused by ice crystal icing on heated and non-heated surfaces. Experimental findings show the accretion threshold and shed areas under different parametric conditions. The results not only consolidate previous studies, but also identify new phenomena on unheated surfaces with mixed-phase conditions at negative wet bulb temperatures and positive wet bulb temperatures.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Ezieddin Madi, Kevin Pope, Weimin Huang
Summary: This study experimentally investigates the impact of ice thickness on the energy required for de-icing. It is found that an increase in ice thickness at the heater's edge leads to a significant increase in de-icing duration. The results suggest that employing a correlation between ice thickness at different locations can help reduce the thermal energy needed for ice removal from airfoil or cylindrical surfaces.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
K. Riska, R. Bridges
Summary: Understanding the properties and parameters of ice growth models is crucial for assessing the impact of ice on facilities and ship navigation. This paper investigates the theoretical formulations for ice growth and compares calculated results with measurement data. The study focuses on level sea ice growth models and their application in brash ice consolidation modeling, considering factors such as snow cover, salinity, porosity, and atmospheric boundary including wind effect. The findings contribute to a better understanding of ice growth and consolidation processes, informing modeling techniques for marine design and operations.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)