基于SFIA的路基沉降预测应用研究

On the SFIA-based Prediction of Roadbed Settlement

阐述地基与基础共同作用分析方法即SFIA。对软土路基沉降预测方法统计分析,考虑原地面与填方土体协同作用,最终确定了SFIA方法的优越性。利用SFIA对湖北某高速公路匝道填方施工进行分析,结合实际沉降观测结果,与沉降预测计算值进行对比。结果表明:分阶段模拟路基施工过程,并根据地基土系数在不同阶段的负载变化,结合相应的非线性系数计算路基沉降的结果更接近工程实际。

The paper described the method of SFIA.After the statistical analysis of soft soil subgrade set-tlement prediction methods,considering the original ground and soil fill synergies,it ultimately determined the superiority of SFIA methods.SFIA was used to analyze a freeway ramp fill construction in Hubei,and the actual settlement observations were compared with the subgrade subsidence prediction.The results show that the calculation results of subgrade settlement is closer to engineering practice,with the phased of subgrade construction process simulation,according to the load changes of foundation soil coefficients in different stages,combined with the corresponding non-linear coefficient.