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冰川冻土 ›› 1981, Vol. 3 ›› Issue (3): 37-46.

• 研究论文 • 上一篇    下一篇

吉林省季节冻深的统计特征及计算冻深的确定方法

张兴, 王世铎   

  1. 吉林省水利科学研究所
  • 收稿日期:1980-10-18 出版日期:1982-08-25 发布日期:2012-04-26

STATISTICAL CHARACTERISTICS OF SEASONAL PERMAFROST IN JILIN, CHINA AND THE METHOD FOR DETERMINING THE FROZEN DEPTH

Zhang Xing, Wang Shiduo   

  1. Jilin Institute of Scientific Research in Water Conservancy
  • Received:1980-10-18 Online:1982-08-25 Published:2012-04-26

摘要: 在季节冻土地区,冻深的取值是工程设计和施工的重要问题。目前,水工专业尚无专门的有关规范,多以《工业与民用建筑地基基础设计规范TJ7—74》中的有关条文作主要参考。在实践中,各有成功和失败,其原因之一就是在冻深取值时没能针对具体工程地点的冻结条件及建筑物自身的特点和运行要求。

Abstract: Based on the statistical analysis of the frozen depth of the seasonal permafrost in Jilin, the authors obtained the formula ho=a(√Ω+b) for calculating the frozen depth of the seasonal permafrost in the less snow years and in the no snow years, and the formula h=a (√Ω+b-kHx) for that where the annual mean depth of snow accumulation is over 2 cm under natural snow accumulation condition.The decrease in frozen depth of every cm of mean snow accumulation is s=a.k, and the frozen depth ratio of two adjacent measuring points is kh=aA/aB.The distribution of frozen depth of seasonal permafrost in Jilin has a positive state of distribution feature, taking the Peason’s Type Ⅲ curve cs-o as the theoretical frequency curve for the frozen depth of a designated place. Frozen depth of adjacent points appears in same frequency.Calculation of frozen depth applied in engineering design should base on the grade of engineering construction and the running conditions, adopting frozen depth hp of a certain frequency.