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气相封闭的含气泡土是一种特殊的非饱和土类型,其孔隙流体压缩性不可忽略。以小气泡概念模型假设为基础,基于理想气体变形的Bolye定律及表面张力作用等基础理论,推导分析了含封闭气泡土体孔隙混合流体的压缩系数C_(gw)不同计算公式。针对水饱和度较高时已有研究公式的不完善性,采用将溶于水的气体和水作为整体确定其压缩系数的处理思路,在此基础上提出了一种C_(gw)的计算方法,并将不同水饱和度下的计算结果与其他计算方法进行对比研究,分析了其合理性和适用性,还分析了孔隙混合流体压缩系数公式中相关参数变化规律及其对计算结果的影响。
Gaseous closed gas-bearing soils are a special type of unsaturated soils whose compressibility of pore fluids can not be neglected. Based on the concept of small bubbles, based on the Bolye’s law of ideal gas deformation and the fundamental theory of surface tension, the different calculation formulas of the compressive coefficient C_ (gw) of pore fluid in closed-pore soils are deduced and analyzed. Aiming at the imperfection of the existing research formulas when the water saturation is high, a method of calculating the compressibility of water and water as a whole is established. On this basis, a calculation method of C_ (gw) . Comparing the calculation results under different water saturations with other calculation methods, the rationality and applicability are analyzed. The variation rules of the relevant parameters in the compressibility coefficient formula of pore fluid mixture and its influence on the calculation results are also analyzed.