基于ABAQUS基础面外附加压应力数值模拟及简化方法研究

Numerical simulation of additional lateral compressive stress outside strip foundation under ABAQUS retaining wall and application of simplified engineering method

为分析挡土墙下条形基础面外附加侧向压应力的分布与大小,采用ABAQUS对挡土墙下条形基础面外附加侧向压应力进行了多工况数值模拟,结果表明:对于同一条形基础,随着基底压应力的增大,挡土墙下条形基础附加侧向压应力也随之增大,增大幅度随基础宽度的增加而逐渐减小;基础宽度1.4 m以内时,挡土墙下条形基础附加侧向压应力的大小随基础宽度的变化趋势较为离散,而当基础宽度大于1.5 m时,该变化趋势趋于稳定。在此基础上,提出并验证了适用于实际工程中的简化公式。

In order to analyze the distribution of the additional lateral compressive stress outside the strip foundation under the retaining wall,ABAQUS was used to conduct numerical simulation of the additional lateral compressive stress outside the strip foundation under the retaining wall under multiple working conditions.The results show that:for the same strip foundation,the additional lateral compressive stress of the strip foundation under the retaining wall increases with the increase of the foundation compressive stress,and the increase amplitude decreases gradually with the increase of the foundation width.When the foundation width is less than 1.4 m,the variation trend of the additional lateral compressive stress of strip foundation under the retaining wall with the foundation width is relatively discrete,and when the foundation width is greater than 1.5 m,the variation trend tends to be stable.On this basis,a simplified formula suitable for practical engineering is proposed and verified.