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融沉变形破坏是多年冻土区建筑物冻害的主要原因之一,实际的融沉量是热融沉陷与压缩沉降量的叠加:冻土融化体积压缩系数是估算冻土融后压缩沉降变形量的关键计算参数。根据286个冻土原状样融沉压缩试验数据资料,对细砾土、砂土、粉土、黏性土、泥炭化黏性土和泥炭质土等6类土,分别提出了在0～100 kPa和0～200 kPa压力段两种条件下的体积压缩系数和干密度之间的线性、二项式和对数式回归分析方程式。在此基础上,给出了确定6类土体积压缩系数的经验数据表。此外,还指出了现有规范推荐方法和建议值所存在的问题。
Deformation and thawing deformation is one of the main causes of building damage in permafrost regions. The actual thawing settlement is the sum of thermal and thermal settlement and compressive settlement. The volumetric compression coefficient of thawing and thawing is used to estimate the compressive settlement and deformation after thawing The key calculation parameters. Based on the experimental data of 286 thaw subsidence compression tests, the authors put forward a series of experimental data of 6 kinds of soil such as fine gravel soil, sand, silt, clay, peat clay and peat soil, Linear, binomial and logarithmic regression equations between the volumetric compressibility and the dry density for both kPa and 0-200 kPa pressure sections. On this basis, the empirical data table for determining the compressibility of six types of soil volume is given. In addition, the problems existing in the recommended methods and recommended values of existing specifications are also pointed out.