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冰川冻土 ›› 1981, Vol. 3 ›› Issue (3): 63-68.

• 研究论文 • 上一篇    下一篇

板基法向冻胀力现场试验研究

管枫年1, 周长庆2, 贲永为2, 陈肖柏1   

  1. 1. 黑龙江省水利勘测设计院;
    2. 黑龙江省低温建筑科学研究所;
    3. 中国科学院兰州冰川冻土研究所
  • 收稿日期:1980-11-07 出版日期:1982-08-25 发布日期:2012-04-26

EXPERIMENTAL RESEARCH OF NORMAL FROST HEAVING STRESS UNDER MAT FOUNDATION IN SITU

Guang Fengnian1, Zhou Chanqing2, Ben Yong-wei2, Chen Xiaobai1   

  1. 1. Water Conservancy and prospecting Institute, Heilongjiang Province;
    2. Low Temperature Construction Institute, Heilongjiang Province;
    3. Lanzhou Institute of Glociology and Cryopedology, Academia Sinica
  • Received:1980-11-07 Online:1982-08-25 Published:2012-04-26

摘要: 迄今,国内外有关基底法向冻胀力的资料大多局限于小面积,现场大面积之实测值所见较少,难于在大型板基中应用。本文根据就地试验观测结果,对基底法向冻胀力与基础面积间的关系及分布情形进行了讨论和分析。

Abstract: The experimantal results in situ in the deep seasonal frost district of Heilongjiang Province show that the normal frost heaving stress under foundation is affected mainly by the area F of the foundation besides by the characteristics and moisture of soil, and depth of frost and of foundation, and that it consists of the " pure normal frost heaving stress underthe foundation δo" and the " apparent tangential frost heaving stress ∑τi/F" acting on the frozen column under the foundation, ie. δi=δo+∑τi/F (1)Analysing the experimental results of maximum normal frost heaving stress i with various size of foundational cross section Fi (Tab. 2), we could obtain the relative formula between them as follows: δi=δo+a/Fi+b/Fi2 (2)where δo = 1.75, a = 142 and b= -150 in our given field.Besides above, it is shown that the distribution of normal frost heaving stress under the foundation is not uniform (see Fig. 7).