Article
Environmental Studies
Hui Liu, Songbo Huang, Chou Xie, Bangsen Tian, Mi Chen, Zhanqiang Chang
Summary: This study uses time series InSAR technology to monitor the deformation of different sections of the Qinghai-Tibet railway, revealing uneven settlement of the roadbed and its temporal changes. The research also shows that the impact of different ground layers on permafrost deformation varies, and human activities have a less significant influence compared to topography and hydrothermal conditions. The TZ and WB sections of the railway exhibit more obvious roadbed deformation.
Article
Geosciences, Multidisciplinary
Qihang Mei, Bin Yang, Ji Chen, Jingyi Zhao, Xin Hou, Youqian Liu, Jinchang Wang, Shouhong Zhang, Haiming Dang
Summary: The crushed-rock structures drive heat convection through temperature difference and are widely used in the construction and maintenance of the Qinghai-Tibet Railway as cooling measures in permafrost regions. Different forms of crushed-rock structure embankments exhibit varying stability under climate warming, with the CRRE needing reinforcement in warm and ice-rich permafrost regions under climate warming.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Engineering, Geological
Saize Zhang, Fujun Niu, Jinchang Wang, Tianchun Dong
Summary: This study analyzed the deformed embankment data of the Qinghai-Tibet Railway (QTR) in permafrost regions, revealing that the total length of deformed embankments was 22.97 km, with a damage rate of approximately 5.4%. The results showed that the embankments stabilized over time.
ENGINEERING GEOLOGY
(2021)
Article
Engineering, Environmental
Renwei Li, Mingyi Zhang, Varvara Andreeva, Wansheng Pei, Yanqiao Zhou, Ivan Misailov, Nikolay Basharin
Summary: This study evaluates the changes in permafrost in the Qinghai-Tibet Plateau and finds that permafrost degradation will continue, with a decrease in permafrost area and an increase in active layer thickness. The results provide important information for environmental protection and engineering risk management.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Geography, Physical
Mei Mu, Cuicui Mu, Pengsi Lei, Xiaoxiao Mo, Yuan Qiao, Xu Chen, Hebin Liu
Summary: This study created a dataset of thermokarst lakes on the Qinghai-Tibet Plateau using Google Earth Engine data and visual inspection. The study analyzed the temporal and spatial changes in the lakes and their relationship to environmental factors. The results showed that the number and surface area of thermokarst lakes in the region have increased over the past 30 years.
Article
Environmental Sciences
Yan-Dong Hou, Qing-Bai Wu, Ming-Li Zhang, Feng-Xi Zhou
Summary: Research on the long-term maintenance and reinforcement of permafrost subgrade is important due to its uniqueness and complexity, especially under climate warming and engineering activities. The crushed-rock revetment (CRR) was used to mitigate subgrade diseases caused by thermal disturbance, and its effects on thermal and deforming stability were evaluated. The results showed that the CRR had different effects in different climate regions, and more effective reinforcements are needed to alleviate potential threats in warm permafrost regions.
ADVANCES IN CLIMATE CHANGE RESEARCH
(2022)
Article
Environmental Sciences
Fang Ji, Linfeng Fan, Xingxing Kuang, Xin Li, Bin Cao, Guodong Cheng, Yingying Yao, Chunmiao Zheng
Summary: This study investigates the effects of soil wetting and granularity on the changes in active layer thickness (ALT) and assesses the spatiotemporal dynamics of ALT on the Qinghai-Tibet Plateau (QTP). The results show that soil wetting slows down the thickening of the active layer in response to warming, and latent heat has a stronger control on ALTs compared to thermal conductivity. Additionally, under similar warming conditions, coarse soils have a faster thickening rate than fine soils.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Biodiversity Conservation
Tonghua Wu, Xiaofan Zhu, Pengling Wang, Saruulzaya Adiya, Dashtseren Avirmed, Battogtokh Dorjgotov, Ren Li, Xiaodong Wu, Peiqing Lou
Summary: The QTP and Mongolia have experienced warming trends in air temperature and freezing/thawing index, but the seasonality and spatial distribution of the warming differ.
ECOLOGICAL INDICATORS
(2022)
Article
Engineering, Geological
Zhan-yuan Zhu, Chen-xuan Tang, Yong Ma, Fei Luo, Bin Luo, Zu-yin Zou, Zi-hong Guo, Xian-gang Jang
Summary: This paper studied the train-induced vibration response characteristics of the Beiluhe subgrade of the Qinghai-Tibet railway (QTR) to evaluate the impact of railway vibration loads on the ice-rich permafrost layer. The results showed that increasing the embankment height can reduce the dynamic stress of the permafrost layer, while increasing the mean annual ground temperature and decreasing the embankment height can aggravate the permafrost table vibration-induced subsidence. The study also analyzed the relationships between the permafrost table vibration subsidence and various factors and predicted the subsidence under different global warming conditions.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Environmental Sciences
Zhi-Zhong Sun, Wei Ma, Gui-Long Wu, Yong-Zhi Liu, Guo-Yu Li
Summary: Permafrost degradation along the Qinghai-Tibet Highway on the Qinghai-Tibet Plateau has negative impacts on the highway's subgrade deformation. A monitoring system of ground temperature was established from 1995 to 2020 in 10 natural sites along the highway. The results show that both permafrost table depth and ground temperature exhibited an increasing trend with spatial and temporal differences. Information on permafrost degradation is necessary for designing effective strategies for engineering construction and environmental protection in permafrost regions under climate warming.
ADVANCES IN CLIMATE CHANGE RESEARCH
(2023)
Article
Engineering, Environmental
Guanli Jiang, Hongting Zhao, Yongzhi Liu, Qingbai Wu, Siru Gao
Summary: Highway and railway embankments have different thermal impacts on the underlying permafrost, leading to variations in the long-term soil temperatures, permafrost table depth, varying rates, and sunny-shady effect characteristics. The permafrost underlying a highway embankment tends to warm and deepen, while the permafrost underlying a railway embankment can slow or even cool down. The thermal impacts of a highway on the underlying permafrost are greater than those of a railway.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Jing Wang, Chao Wang, Hong Zhang, Yixian Tang, Wei Duan, Longkai Dong
Summary: This study monitored surface deformation along the Qinghai-Tibet Railway using the MTS-InSAR method and proposed a new method for permafrost distribution mapping. Results showed that most areas were relatively stable, while some sections prone to geological hazards were identified.
Article
Geosciences, Multidisciplinary
Renwei Li, Mingyi Zhang, Pavel Konstantinov, Wansheng Pei, Oleg Tregubov, Guanji Li
Summary: This study aims to provide the first hazard data-driven thaw settlement susceptibility map for the Qinghai-Tibet Plateau (QTP) and identify high-risk areas for decision makers.
Article
Environmental Sciences
Zi-Teng Fu, Qing-Bai Wu, Lu-Yang Wang, Ya-Li Liu
Summary: Alpine vegetation plays a crucial role in maintaining the thermal stability of permafrost under a warming climate. In this study, the response of soil hydrothermal dynamics in the active layer to permafrost degradation was examined in different alpine grasslands on the Qinghai-Tibet Plateau. The results showed that vegetation type and soil properties influenced soil temperature, soil water content, and freeze-thaw processes, with alpine meadows exhibiting distinct characteristics.
ADVANCES IN CLIMATE CHANGE RESEARCH
(2023)
Article
Engineering, Environmental
Honglei Wang, Zhizhong Sun, Jianming Zhang, Yongzhi Liu, Guoyu Li
Summary: The study investigated the formation mechanism of suprapermafrost taliks beneath earth-filled embankments along the Qinghai-Tibet Railway, finding that thermal disturbance of filling and vertical heat accumulation were related factors, closely associated with the mean annual ground temperature and height of embankment filling materials. The findings can help understand the formation and evolution of such taliks and provide guidance for implementing countermeasures to increase ground bearing capacity in similar sections along the QTR.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2021)
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)