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冰川冻土 ›› 2015, Vol. 37 ›› Issue (2): 417-421.doi: 10.7522/j.issn.1000-0240.2015.0046

• 寒区科学与技术 • 上一篇    下一篇

静冰力学模型试验的相似比尺问题探讨

汪恩良1,2, 刘兴超1, 常俊德3   

  1. 1. 东北农业大学 水利与建筑学院, 黑龙江 哈尔滨 150030;
    2. 中国科学院 寒区与旱区环境与工程研究所 冻土工程国家重点实验室, 甘肃 兰州 730000;
    3. 黑龙江省水利科学研究院, 黑龙江 哈尔滨 150080
  • 收稿日期:2014-09-11 修回日期:2015-01-22 出版日期:2015-04-25 发布日期:2015-06-06
  • 作者简介:汪恩良(1971-), 男, 河北滦南人, 教授, 2008年于哈尔滨工业大学获得博士学位, 现主要从事工程冻土和水工建筑物冻害防治研究. E-mail: HLJWEL@126.com.
  • 基金资助:

    黑龙江省自然科学基金项目(E201405); 黑龙江省博士后项目(LBH-Z13031); 冻土工程国家重点实验室开放课题(SKLFSE201207)资助

Discussion on the geometric similar problems in static ice pressure model test

WANG Enliang1,2, LIU Xingchao1, CHANG Junde3   

  1. 1. Water Resources and Architectural College of Northeast Agricultural University, Harbin 150030, China;
    2. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    3. Heilongjiang Provincial Hydraulic Research Institute, Harbin 150080, China
  • Received:2014-09-11 Revised:2015-01-22 Online:2015-04-25 Published:2015-06-06

摘要:

分析冰盖形成的热力学模型, 推导出室内模型试验的相似比尺. 模拟野外降温过程, 在低温实验室内进行静冰压力模型试验, 研究实验室模拟静冰压力产生过程的可行性. 结果表明: 实验室模拟最大冰厚39.8 cm, 试验历时387.4 h, 冰的冻结过程符合天然规律; 实验室目前难以模拟融化过程中天然状态的太阳辐射, 有待进一步改进降温制度. 模拟试验的冰压力最大值出现在升温阶段, 与温升率相关, 温升率越大, 静冰压力值越大; 当环境温度升至0 ℃左右时, 静冰压力达到最大值, 随后迅速消散, 符合水库冰过程观测结果.

关键词: 静冰力学, 模型试验, 相似比尺, 试验研究

Abstract:

The thermodynamic model was analysed and the similarity ratio of the model test was derived in this study. Through simulating the field-cooling process, a model test on static ice pressure was conducted in a low-temperature laboratory to examine the feasibility of simulating the developing process of static ice pressure in a laboratory. The following conclusions were drawn: the maximum ice thickness was 39.8 cm during the test, which lasted 387.4 h, with the simulated ice-freezing process corresponded with the order of natural process; At present, it is too difficult to simulate the nature solar radiation during the thawing process in the laboratory. Thus, the temperature control process should be improved; The simulated maximum static ice pressure occurs in the temperature rise period, which is related to the temperature rising rate. The temperature rising rate faster, the static ice pressure. Morover, static ice pressure reaches the maximum when the air temperature reaches 0 ℃, and then decreases quickly, which is consistent with the observation in the ice development process on reservoir.

Key words: static ice pressure, model test, similarity ratio, experimental study

中图分类号: 

  • P343.6