多年冻土融沉性分类研究  

A Study of Classification of Thaw-Settlement Properties of Permafrost

作　　者：吕玉兰[1] 冷毅飞[2] 姜龙[1] 张喜发[2] 

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,吉林长春130026

出　　处：《冰川冻土》2011年第4期760-764,共5页Journal of Glaciology and Geocryology

摘　　要：在冻土工程中,冻土的融沉性评价是工程地质勘察的主要内容之一,融沉性分类是冻土地基基础设计施工的重要依据.根据345个冻土原状样品融沉压缩试验数据,提出了细砾、砂土、粉土、黏性土、泥炭化黏性土和泥炭质土等6类土的融沉系数-含水量或融沉系数-超塑含水量线性回归方程式,得到与各融沉性分级相应的界限含水量或界限超塑含水量.最后,简述了国内冻土融沉性分类现状,并分细粒土和粗粒土两种情况,将分类成果与国内现行规范冻土融沉性分类进行对比.The evaluation of permafrost thaw-set- tlement is one of the main tasks of engineering geological investigation in frozen soil engineering, and thaw-settlement classification is an important basis for the design and construction of foundations on permafrost. Based on the thaw-compression test data of 345 undisturbed samples, linear regression equations of thaw-settlement coefficients and total water contents or thaw-settlement coefficients and superplastic water contents of gravel, sand, silt,cohesive soil, peaty cohesive soil and peat soil are presented. On this basis, the corresponding boundaries of water content or superplastic water content limits are obtained. At last, the domestic status about classification of thaw-settlement property of permafrost is introduced. The classification results are compared with the existing standards of thaw-settlement property classification of permafrost at home and abroad for fine-grained soil and coarse grained soil.

关 键 词：冻土融沉系数 含水量 干密度 融沉性分级 界限含水量 

分 类 号：P642.14[天文地球—工程地质学]