倾斜荷载盐渍土地基承载力数值计算与试验研究

盐渍土是一种四相组成的特殊土。这种特殊性导致工程中确定的盐渍土地基承载力尤其在倾斜荷载作用下时，容易出现偏差。本文以柴达木盆地典型盐渍土地基承载力特征为研究对象，采用现场载荷试验和数值模拟计算的方法，研究了倾斜荷载作用下盐渍土地基承载力特征。结果表明，在倾斜荷载作用下，数值模拟计算确定的盐渍土地基承载力特征值和现场试验确定的特征值相差2.37%，数值模拟计算结果和现场试验结果基本一致。在建立数值模拟计算模型时，需要考虑盐渍土地基中存在结晶盐楔体被压碎、溶陷造成土层附加应力非线性分布特征。数值模拟计算结果可做为确定倾斜荷载作用下的盐渍土地基承载力的特征值的依据。

Numerical calculation and experimental study on bearing capacity of saline soil under inclined load

Saline soil is a special soil composed of four phases. This particularity leads to the deviation of the bearing capacity of saline soil foundation in engineering, especially under the action of inclined load. In this paper, the bearing capacity characteristics of typical saline soil foundation in Qaidam Basin are studied by field load test and numerical simulation. The results show that under the inclined load, the difference between the characteristic value of bearing capacity of salted soil foundation determined by numerical simulation and the characteristic value determined by field test is 2.37%, and the results of numerical simulation and field test are basically consistent. When establishing the numerical simulation model, it is necessary to consider the nonlinear distribution of additional stress in the soil layer caused by the crushing and dissolution of the crystalline salt wedge in the saline soil foundation. The numerical simulation results can be used as the basis to determine the characteristic value of bearing capacity of saline soil foundation under inclined load.