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古典土力学的变形模量是根据载荷试验沉降曲线中直线段的斜率(压力和沉降量之比),用半无限均值弹性体公式计算的线性模量。这只能用于变形的线性阶段。弦线模量是根据载荷试验全过程沉降曲线上任意点压力Р所在线段的弦线斜率(压力增量和沉降增量之比)取代变形模量的直线段斜率计算的相应于压力Р的非线性模量。弦线模量可以计算土的非线性变形,变形模量是弦线模量的特解,弦线模量是通解。黄土湿陷变形是非线性变形,因而可以用弦线模量进行计算。
The deformation modulus of classical soil mechanics is calculated according to the slope (the ratio of pressure and settlement) of the straight line segment in the settlement curve of load test, and the linear modulus calculated by semi-infinite mean value elastomer formula. This can only be used in the linear phase of deformation. The chord modulus is calculated according to the slope of the straight line segment of the deformation modulus corresponding to the slope of the chord (the ratio of the pressure increase to the settlement increment) of the segment where the pressure Р is located at any point on the settlement curve in the entire load test. Nonlinear Modulus. String modulus The nonlinear deformation of soil can be calculated. The modulus of deformation is a special solution to the modulus of the string. The modulus of the string is the general solution. Loess deformation is a nonlinear deformation of deformation, which can be calculated using the chord modulus.