寒冷地区水库码头静冰压力的原型观测与分析

IF 3.8 2区工程技术 Q1 ENGINEERING, CIVIL

Cold Regions Science and Technology Pub Date : 2024-10-28 DOI:10.1016/j.coldregions.2024.104352

Wenliang Qiu , Kuan Li , Xin Zhao , Zhaolong Hou , Zhenguo Wang , Junpeng Yu

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引用次数: 0

摘要

静冰压力是威胁寒冷地区水库桥梁结构安全的一个重要因素。桥墩在水冰转换过程中会承受较高的静冰压力，可能导致桥墩变形甚至失效。为了研究静冰压力的时空分布，本研究在中国内蒙古锡林郭勒盟西拉木伦水库的冰层上进行了为期两年的野外观测实验。本研究设计了一种新型冰压板来测量静态冰压。同时，记录了气温、冰温和冰厚，分析了静态冰压的影响因素。结果表明，新型冰压板可准确测量冰层内的变化冰压及其垂直分布。冰层厚度增长因子是根据冻冰度日模型计算得出的，降雪量是影响冰层厚度增长因子的关键参数。提出了计算冰原内部温度分布的新公式，其中关键参数是根据测量数据确定的。计算得出的冰压力与观测值非常吻合，这表明所提出的公式是正确的。桥墩上的最大冰压力出现在冰面以下 1/3 至 1/2 的冰厚度处，并随着冰厚度的增加逐渐向下移动。此外，冰压不仅受气温影响，还受冰层开裂状态、制约因素、日照时间等因素的影响。这项研究可用于预测冰层生长、冰压和冰温分布，有助于寒冷地区水库桥墩的抗冰设计。

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Prototype observation and analysis of static ice pressure on reservoir piers in cold regions

Static ice pressure is an important factor threatening the structural safety of bridges built in cold region reservoirs. Bridge piers will be subjected to high static ice pressure during the conversion of water to ice, which may cause deformation or even failure of piers. To investigate the spatial and temporal distribution of static ice pressure, this study carried out a two-year field observation experiment on the ice sheet of the Xilamulun Reservoir in Inner Monggol, China. A novel ice pressure panel was designed to measure static ice pressure in this work. Meanwhile, the air temperature, ice temperature, and ice thickness were recorded to analyze the influencing factors of static ice pressure. The results show that the new ice pressure panel provided an accurate measurement of the varying ice pressure and its vertical distribution within the ice sheet. The ice thickness growth factor was calculated based on the Freezing Ice Degree Day model, and snowfall was the critical parameter affecting the ice thickness growth factor. The new formulas for calculating the temperature distribution within the ice sheet were presented, in which critical parameters were determined based on measured data. The calculated ice pressures matched well with the observed values, which indicates the validity of the presented formulas. The maximum ice pressure on piers occurred at 1/3 to 1/2 of the ice thickness below the ice surface and gradually moved downward as the ice thickness increased. Moreover, the ice pressure is not only affected by the air temperature but also by the cracking state of the ice sheet, constraints, sunshine time, etc. This study can be used to predict ice sheet growth, ice pressure, and ice temperature distribution and contribute to the ice-resistant design of bridge piers in cold region reservoirs.

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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.