冻土融沉系数的经验确定方法  

The empirical method on thawing settlement coefficient of frozen soil

作　　者：姜龙[1] 冷毅飞[2] 张喜发[2] 吕玉兰[1] 

机构地区：[1]大庆油田工程有限公司,黑龙江大庆163712 [2]吉林大学建设工程学院,长春130026

出　　处：《工程勘察》2011年第5期22-25,共4页Geotechnical Investigation & Surveying

摘　　要：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。Thawing settlement coefficient is an important parameter for engineering design to estimate the thawing settlement of frozen soil and it is an index of thaw settlement classification of soil.Based on the 345 thawing compression test data of disturbed frozen soil samples,it gives out linear regression equations of six sorts of soils which are gravel,sand,silt,clay,peaty clay and peat soil.These linear regression equations can estimate thawing settlement coefficient of the soils.Meanwhile it makes analysis of the cause and effect of using superplastic water content for estimating thawing coefficient and it also analyzes the thawing sensitivity of various types of soils.At last,it compares empirical regression equations with the existing norms and points out some deficiencies of the latter.

关 键 词：冻土融沉系数 含水量 超塑含水量 干密度 经验公式 

分 类 号：TU411[建筑科学—岩土工程]