对地基应力解除法进行建筑物纠偏数值模拟

Numerical immitation of building rectifaction by stress relief

为研究对建筑物进行纠偏 ,提出了土体的一种非线性弹 -粘弹性流变本构模型 ,并将模型成功运用于软粘土纠偏实践中 ,用有限元法对地基应力解除法纠偏建筑物的全过程进行了数值模拟 ,并对施工过程中地基应力水平场和位移场的变化转移、沉降速率随时间的变化规律及计算范围内地面的沉降量等进行了分析 ;结果表明 :软土的流变特性对纠偏的影响不可忽略 ;

A nonlinear elastic viscoelastic rheology constitutive model of soil is proposed and successfully used for rectifaction of soft soil. The numerical immitation of building rectifaction by the stress relief is done by finite element method to analyse the transferring and changes of foundation stress horizon and displacement field and the changes of settlement speed rate with time and settlement values of the ground. The result shows the effect of soft soil's rheological characteristics to building rectifaction can't be neglected and the result of rectifaction is better when the rheology of soil is considered.