Design and Experience—Controlling Railroad Embankment Deformation on Ice-Rich Permafrost

Kondratiev, Valentin G.

doi:10.1061/40621(254)40

Cited by 3 publications

(2 citation statements)

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“…The design, construction, and operation of railways, highways, and pipelines in permafrost regions must address the problems of embankment deformation, especially thaw settlement (differential or uneven) under a warming climate and the influences of human activities [70, 71]. For example, as one of the major railways in permafrost regions in the early 20th century, the Trans‐Siberian Railway and Alaska Railroad are substantially affected by frost heave and thaw settlement of permafrost, and the proportion affected in the Trans‐Siberian Railway was as high as 40% [72].…”

Section: Permafrost Engineering: Proactive Roadbed Cooling Principle ...mentioning

confidence: 99%

Academician Guodong Cheng's Contributions to Permafrost Science

2024

Permafrost & Periglacial

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Permafrost is strongly associated with human well‐being and has become a frontier of cryospheric science. Professor Guodong Cheng is one of the most outstanding geocryologists in China. He was elected as an academician of the Chinese Academy of Sciences in 1993 and served as the president of the International Permafrost Association from 1993–1998. In the early 1980s, Professor Cheng proposed the hypothesis of the repeated‐segregation mechanism for the formation of thick‐layered ground ice near the permafrost table. Subsequently, in the early 2000s, he proposed the “proactive roadbed cooling” concept and led the successful development of a series of specific engineering measures that were fully applied in the Qinghai–Tibet Railway Project. Furthermore, he developed a conceptual model to describe the influences of changing permafrost on the groundwater system and discovered the “sink‐holing effect” (channeling with improved hydraulic conductivity of warming permafrost). Professor Cheng has also developed theories on the three‐dimensional zonation and proposed a classification system and an altitude model for high‐altitude permafrost distribution. On this special occasion of Professor Cheng's 80th birthday, this paper summarizes his outstanding achievements on permafrost science, hoping the permafrost research community will carry forward the momentum to further advance permafrost science worldwide.

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Section: Permafrost Engineering: Proactive Roadbed Cooling Principle ...mentioning

confidence: 99%

Academician Guodong Cheng's Contributions to Permafrost Science

2024

Permafrost & Periglacial

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“…Solar radiation can generate significant amounts of heat, 83 and without cloud cover or vegetation, the ground surface temperature will be much higher than the ambient air temperature when exposed to direct sunlight for long periods of time. This has been confirmed by numerous in situ observations (e.g., 125–129 ), which is why crushed rock embankment structures 130–132 and awning 133 /shading boards 134–136 are used for road engineering construction in permafrost regions. Moreover, a thin snow layer can maintain a relatively low underlying ground temperature due to its high surface albedo, which can greatly attenuate the heat from solar radiation 23,101 …”

Section: Cooling Effectsmentioning

confidence: 99%

Talus and its cooling effects on the thermal regime of permafrost: A review

Lan,

Cao,

et al. 2023

Permafrost & Periglacial

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Talus, as the product of movement and accumulation along the slope after the cracking of cliffs or steep rock walls, is a common landform in the mountain periglacial environment. Significant thermal anomalies within talus have been widely reported to be a result of cooling effects. During the cold season, the increased temperature difference between talus and the ambient environment strengthens the intensity of convection (vertical flows) and transforms into upward advection (lateral flows) and exhausts the internal warm current. During the warm season, heat is concentrated on the surface of the talus, and the internal dominant cold current moves downward along the slope by advection. The principle of the proactive cooling effects of talus has been widely utilized in railway construction within permafrost regions as embankments to alleviate degradation of the underlying permafrost. However, limited model studies have examined the cooling effects of blocky debris in nature, and in situ observations are rare. Therefore, it will be important to increase observations and develop process‐based models that couple heat conduction, convection/advection, water transfer processes, and even the latent heat of phase change. This will help to better understand the extent of the cooling effects and its impact on the thermal regime of permafrost.

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Main Geotechnical Problems of Railways and Roads in Kriolitozone and Their Solutions

Kondratiev

2017

Procedia Engineering

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Design and Experience—Controlling Railroad Embankment Deformation on Ice-Rich Permafrost

Cited by 3 publications

References 0 publications

Academician Guodong Cheng's Contributions to Permafrost Science

Academician Guodong Cheng's Contributions to Permafrost Science

Talus and its cooling effects on the thermal regime of permafrost: A review

Main Geotechnical Problems of Railways and Roads in Kriolitozone and Their Solutions

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