气候变化领域集成服务门户(CCPortal): Laboratory investigation of the spatial thermodynamic properties of the bridge approach in the permafrost region

CCPortal

DOI	10.3389/feart.2024.1394898
	Laboratory investigation of the spatial thermodynamic properties of the bridge approach in the permafrost region
	Yin, Qixiang; Wu, Junjie; Zhang, Boyang; Hou, Mingjiao
发表日期	2024
EISSN	2296-6463
起始页码	12
卷号	12
英文摘要	As the highest altitude and the longest plateau railway line, the Qinghai-Tibet railway passes through a large area of continuous permafrost. As the key position of the combination of roadbed and bridge, the stability and strength of the bridge approach directly affect the smoothness of the whole line. Through an indoor model test, the distribution pattern of space temperature field and the change law of temperature measuring points in the bridge approach of gravel sandwich are studied. With the increase in the depth from the subgrade surface, the influence of the temperature change in the upper atmosphere decreases gradually at the 2.5-m platform back of the subgrade center section, resulting in an obvious lag in the subgrade. By comparing the temperature measurement data of different bridge approaches of the gravel interlayer road bridge and the bridge approach of the U-shaped block gravel road bridge, it is shown that the U-shaped structure not only has a better overall cooling effect, but also the cooling effect gradually increases with the increase in the distance from the abutment back. The influence range of the road-bridge transition section on the spatial temperature field is approximately 14 m in the back of the abutment, and the influence range at 7.5 m is the most severe. The research results have important practical significance and engineering application value for the operation and maintenance of the Qinghai-Tibet railway.
英文关键词	bridge approach; permafrost region; gravel sandwich; temperature field; subgrade
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001238717600001
来源期刊	FRONTIERS IN EARTH SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/288747
作者单位	Jiangsu Vocational Institute of Architectural Technology; China University of Mining & Technology; Henan Polytechnic University
推荐引用方式 GB/T 7714	Yin, Qixiang,Wu, Junjie,Zhang, Boyang,et al. Laboratory investigation of the spatial thermodynamic properties of the bridge approach in the permafrost region[J],2024,12.
APA	Yin, Qixiang,Wu, Junjie,Zhang, Boyang,&Hou, Mingjiao.(2024).Laboratory investigation of the spatial thermodynamic properties of the bridge approach in the permafrost region.FRONTIERS IN EARTH SCIENCE,12.
MLA	Yin, Qixiang,et al."Laboratory investigation of the spatial thermodynamic properties of the bridge approach in the permafrost region".FRONTIERS IN EARTH SCIENCE 12(2024).