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冻土融沉系数是计算冻土融化后沉降量的重要参数,也是多年冻土融沉性分类的一个指标。本文根据345个冻土原状样品融沉压缩试验数据资料,对细砾土、砂土、粉土、粘性土、泥炭化粘性土和泥炭质土这六类土,分别得出了估计其融沉系数a0的回归分析方程。同时还简单论述了采用超塑含水量(w-wp)因子估计山区粘性土融沉性的效果及原因,分析了各类土的融沉敏感性。最后将本文提出的经验回归方程与现有规范推荐方法进行了比较,并指出后者的一些不足。
The thaw settlement coefficient of permafrost is an important parameter to calculate the thawing settlement of permafrost. It is also an index of thawing subsidence classification of permafrost. Based on the experimental data of thawing and thawing compressing of 345 samples of permafrost, this paper estimates the melting and sedimentation of fine grained soil, sand, silt, clay, peat clay and peat soil respectively Regression analysis of coefficient a0. At the same time, the effect and reason of using the super plastic water content (w-wp) factor to estimate the thawing sinkability of mountainous clayey soil are briefly discussed. The sinkage sensitivity of all kinds of soil is analyzed. Finally, the empirical regression equation proposed in this paper is compared with the existing standard recommendation method, and some shortcomings of the latter are pointed out.