Study on the cooling effect of crushed rock-based embankment of high-grade highway in permafrost region under the influence of crushed-rock fragmentation and weathering

IF 3.8 2区工程技术 Q1 ENGINEERING, CIVIL

Cold Regions Science and Technology Pub Date : 2025-01-12 DOI:10.1016/j.coldregions.2025.104427

Wenshu Yang , Qingzhi Wang , Qihang Mei , Jianhong Fang , Ji Chen , Kui Zhang , Jiankun Liu

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Abstract

In road construction within permafrost regions, the crushed rock-based embankments(CRBEs) are commonly used as active cooling measures, particularly on the Qinghai-Tibet Plateau. The unique climatic conditions in this region can lead to fragmentation and weathering of the crushed-rock within these embankments, subsequently diminishing their cooling effectiveness. This study, drawing on field observations from the Gonghe-Yushu high-grade highway(GYHH) and supplemented by numerical simulations, investigates how such degradation affects the embankment's cooling performance. Results indicate that fragmentation and weathering increase soil temperatures underneath the CRBE, accelerate the degradation rate of the permafrost table, and significantly reduce the radius and area of the frozen zone. Additionally, the permafrost table descends more slowly on shady slopes compared to sunny ones. Consequently, the altered pore structure and reduced ventilation due to rock degradation impede internal heat dissipation within the CRBE, thus undermining its cooling capacity.

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来源期刊

Cold Regions Science and Technology 工程技术-地球科学综合

CiteScore

7.40

自引率

12.20%

发文量

209

审稿时长

4.9 months

期刊介绍： Cold Regions Science and Technology is an international journal dealing with the science and technical problems of cold environments in both the polar regions and more temperate locations. It includes fundamental aspects of cryospheric sciences which have applications for cold regions problems as well as engineering topics which relate to the cryosphere. Emphasis is given to applied science with broad coverage of the physical and mechanical aspects of ice (including glaciers and sea ice), snow and snow avalanches, ice-water systems, ice-bonded soils and permafrost. Relevant aspects of Earth science, materials science, offshore and river ice engineering are also of primary interest. These include icing of ships and structures as well as trafficability in cold environments. Technological advances for cold regions in research, development, and engineering practice are relevant to the journal. Theoretical papers must include a detailed discussion of the potential application of the theory to address cold regions problems. The journal serves a wide range of specialists, providing a medium for interdisciplinary communication and a convenient source of reference.