Delamination frost heave in embankment of high speed railway in high altitude and seasonal frozen region

Wu, Xuejiao; Niu, Fujun; Lin, Zhijun; Luo, Jie; Zheng, Hao; Shao, Z.J.

doi:10.1016/j.coldregions.2018.04.017

Cited by 40 publications

(11 citation statements)

References 13 publications

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“…Prior to 1992, many pioneering working in Russia, Canada, the United States, and many European countries greatly promoted the study of frozen soil, including the mechanism of liquid water phase transition [58,59], measurement methods [43,60], and engineering applications [61], which was also related to the development plan for frozen soil areas in these countries at that time. For instance, the increasing research in China from the 1990s may be closely related to engineering projects [62,63], such as the construction and maintaining of the Qinghai-Tibet Railway [64] and Highway [65][66][67]. Figure 3 shows the mutual citation relationship among the 23 countries with minimum five publications.…”

Section: Co-authorship Of Authors Organizations and Countriesmentioning

confidence: 99%

A Scientometric Review of Research Status on Unfrozen Soil Water

Feng

Zhang

et al. 2021

Water

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Unfrozen soil water affects the physical, chemical, hydrological, and mechanical properties of frozen soils, and climate change makes these relationships more complicated. The objective of this study was to investigate the research status of unfrozen soil water using scientometrics. Publications on unfrozen water in frozen soil (UWFS) retrieved from the Web of Science were analyzed with scientometric software tools including VOSviewer, CiteSpace, and HistCite Pro. The annual publication trend, co-authorship of authors, organizations, and countries, and the co-occurrence of keywords were analyzed. The most utilized journals and high-impact publications were identified. The results showed that 2007 (the year the “Bali Road Map” was released) represents a turning point (from slow to rapid) in the development of research on unfrozen water in frozen soil. Researchers and organizations from China and the United States are the major contributors, while Cold Regions Science and Technology is the most utilized journal for publishing research pertaining to UWFS. Currently, there is still a lack of reliable and user-friendly methods and techniques for measuring unfrozen water content. Future efforts are required to understand the mechanisms governing the magnitude of unfrozen water content and to develop new approaches to accurately and rapidly measure unfrozen water content in both laboratory and in situ.

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Section: Co-authorship Of Authors Organizations and Countriesmentioning

confidence: 99%

A Scientometric Review of Research Status on Unfrozen Soil Water

Feng

Zhang

et al. 2021

Water

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“…In seasonal freeze regions, the water in soil freezes under the clod temperature [29]. The temperature changes dramatically from the ground surface to the maximum freeze depth-a process that directly affects the direction and intensity of water migration [28].…”

Section: Characteristics Of Temperature and Freeze Depth Change In Seasonal Freeze Regionsmentioning

confidence: 99%

Study on the Hydrothermal Coupling Characteristics of Polyurethane Insulation Boards Slope Protection Structure Incorporating Phase Change Effect

Liu

Wang

et al. 2021

Preprint

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As an important hydraulic infrastructure, the canals are essential for agricultural irrigation, shipping and industry. In the seasonal freeze regions, the water conveyance canals are damaged due to the effects of freeze-thaw cycles. The freeze depth of soil in the water transfer canal varies considerably due to changes in temperature and water content. The paper compares the relationship of the freeze depth, temperature and water content by field tests and numerical calculation methods Incorporating phase change. The results show that the decrease in temperature causes the water in the soil to freeze, the ice front migrate downwards, and the water in soil below ice front gradually migrate towards the ice front, resulting a large difference in water content of the soil before and after freezing. An insulation slope structure, Polyurethane insulation board + Concrete board slope structure (PC), is proposed in this paper to mitigate the effect of freezing and thawing on the water conveyance canals. Under the protective effect, the freeze depth decreases significantly. In addition, this paper compares the anti-frost effect of different thicknesses polyurethane insulation boards, and the results can provide a reference for the anti-frost design of water conveyance canals.

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“…The temperature sensors were designed and produced by the State Key Laboratory of Frozen Soil Engineering, and the normal measurement range of the sensor was −25 to +80°C. In total, 16 temperature sensors with an accuracy of ±0.02°C were installed in a 5 m-deep borehole with a thermistor string (Wu et al, 2018;Miao et al, 2020). The spacing of the temperature sensors was 0.2 m in the top, 1.0 m, 0.25 m from 1.0 to 2.0 m in depth, and 0.5 m from 2.0 to 5.0 m in depth.…”

Section: Monitoring Systemmentioning

confidence: 99%

Studies for Frost Heave Characteristics and the Prevention of the High-Speed Railway Roadbed in the Zoige Wetland, China

Niu

Liu

et al. 2021

Front. Earth Sci.

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The Xining–Chengdu high-speed railway crosses the Zoige Wetland, located on the northeast edge of the Qinghai-Tibet Plateau and the upper reaches of the Yellow River. The cold climate and frost-heave-sensitive subgrade soil cause a large frost heave deformation of the roadbed, threatening the safety of trains. This article systematically studied the ground temperature development, frost heave characteristics, soil water content, and groundwater level variations by field investigation and monitoring. The maximum frost heave deformations of the natural flat ground and hillslope reached 25.64 and 3.17 mm, respectively, and this significant discrepancy was mainly caused by the groundwater supply conditions. Future roadbed stability on the flat ground may be compromised by frost heave deformation. To solve this problem, contrasting indoor tests were conducted to analyze the frost heave characteristics of natural ground clay and replacement coarse-grained soil (CGS). It was shown that the absorbed external water mainly changed into dispersed pore ice in the freezing CGS, while it mainly changed into the layered ice lens in the freezing clay. Further tests showed that the frost susceptibility of the CGS was proportional to the fines content and initial water content. The poorly graded CGS had weaker frost susceptibility than the well-graded CGS. The results suggest that anti-frost methods should be fully considered, including strict control of fines content and water content, prioritizing the use of poorly graded filling, and disruption of local water accumulation in the filling layer.

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Delamination frost heave in embankment of high speed railway in high altitude and seasonal frozen region

Cited by 40 publications

References 13 publications

A Scientometric Review of Research Status on Unfrozen Soil Water

A Scientometric Review of Research Status on Unfrozen Soil Water

Study on the Hydrothermal Coupling Characteristics of Polyurethane Insulation Boards Slope Protection Structure Incorporating Phase Change Effect

Studies for Frost Heave Characteristics and the Prevention of the High-Speed Railway Roadbed in the Zoige Wetland, China

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