寒区跨桥水库冰盖变形与开裂特征研究

IF 3.8 2区工程技术 Q1 ENGINEERING, CIVIL

Cold Regions Science and Technology Pub Date : 2025-04-14 DOI:10.1016/j.coldregions.2025.104517

Wenliang Qiu , Kuan Li , Xin Zhao

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引用次数: 0

摘要

在寒冷地区，水库冰盖开裂是一种常见的自然现象。随着冰裂缝的发展和冰的增长，冰盖会发生很大的变形，严重威胁到桥梁结构的安全。本文以寒区水库冰原为研究对象，开展了冰原变形的野外观测，研究了冰原变形规律。同时，提出了模拟冰裂缝的计算方法，并结合现场裂缝观测结果，对冰裂缝的分布特征及开裂过程进行了研究。研究的主要发现如下：当温度升高时，冰盖以从水库中部向海岸扩展的模式移动。以钢栈桥为分界线，冰盖从钢栈桥位置向水库上下游移动。随着气温的下降，冰盖从海岸向水库中央移动。冰也从水库的上游和下游向钢栈桥移动。通过对冰盖裂缝的产生和延伸方向的研究发现，海岸的凸起处和桥墩的角落容易形成裂缝。裂缝会向更高的应力方向延伸，当桥墩和海岸的凸起更近时，裂缝会趋于连接。库区主要存在4种裂缝类型，其中以岸凸为起点，贯穿整个冰盖的裂缝类型容易对桥墩产生严重的推力。研究结果表明，水库桥梁在冬季不可避免地会受到冰盖开裂的影响。因此，新桥的选址需要考虑冰裂位置和裂缝扩展范围的影响，以消除冰裂带来的安全隐患。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Study on the deformation and cracking characteristics of bridge-crossing reservoir ice sheet in cold regions

The cracking of reservoir ice sheets in cold regions is a common natural phenomenon. As the ice cracks develop and the ice grows, the ice sheet will deform greatly, which seriously threatens the safety of the bridge structure. In this paper, the field observation of ice deformation was carried out with the ice sheet of reservoirs in cold regions as the research object, and the deformation law of the ice sheet was studied. Meanwhile, a calculation method for simulating ice cracks was proposed, and the distribution characteristics and cracking process of ice cracks were investigated in combination with the field crack observation results. The main findings of the study are as follows: When the temperature increased, the ice sheet moved in a pattern of expanding from the middle of the reservoir towards the shores. Using the steel trestle bridge as a dividing line, the ice sheet moved to upstream and downstream of the reservoir from the steel trestle bridge location. As temperatures decreased, the ice sheet moved from the shores towards the middle of the reservoir. The ice also moved from the upstream and downstream of the reservoir towards the steel trestle bridge. The study of the generation and extension direction of ice sheet cracks found that the bumps of the shores and the corners of the piers were prone to form cracks. The cracks would extend towards the higher stresses, and the cracks would tend to be connected when the piers and the bumps of the shores were closer. There were four main crack patterns in the reservoir, among which the crack pattern starting from the shore bump and running through the whole ice sheet was prone to produce serious thrust on the piers. The results of the study show that bridges crossing reservoirs are inevitably affected by ice sheet cracking in winter. Therefore, the location selection of new bridges needs to consider the influence of the position of ice cracking and the extension range of cracks to eliminate the safety hazards arising from ice cracking.

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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.