A calculation method of soft soil pressure bearing mathematical model under repeated load

Abstract

The soft soil pressure bearing mathematical model under repeated normal load is established and its program is implemented. The relationship of soft soil between pressure and settlement under repeated load is solved. Taking the settlement volume, contact area and loading times as independent variables and soil deformation force as dependent variables, the calculus equation of soil deformation force at the arbitrary position is deduced. The soil is discretized section by section in the settlement direction, and the bearing coefficient of the corresponding section is applied. During the unloading-loading period, the calculation formulas of the corresponding stable point and the stiffness of the soil rebounding line are given, and the load settlement program of soft soil is compiled. The soil stiffness value is substituted into the calculus equation, and the Adams software is redeveloped with C/C++language to obtain the load settlement curve. On the soft soil terrain, three kinds of flat plates with diameters of 6, 8, and 10 cm are used to carry out the pressure penetration test to obtain the corresponding pressure-settlement curve. The error between the simulation and experimental results of the mathematical model is no more than 10%.

Keywords

• 重复加载
• 计算模型
• 数学建模
• 载荷-沉陷曲线
• 土壤沉陷