拼宽路基水泥搅拌桩加固方案有限元分析方法及应用

Finite element analysis method and application of cement mixing pile reinforcement scheme for widened subgrade

预测并控制不均匀沉降是路基拼宽工程需要解决的关键问题。针对新旧路基处理工艺不同、荷载作用历程不同等因素,采用有限元分析等方法,探究适宜的新路基处理工艺、新旧路基共同受力及相互影响机理,对施工期及工后沉降进行预测,提出不均匀沉降控制方案,并成功应用于湖堤大道改扩建工程,为类似工程项目实施提供可借鉴的经验。

Predicting and controlling uneven settlement is a key problem to be solved in subgrade widening engineering.In view of the different treatment processes and load processes of the new and old subgrade,finite element analysis and other methods were used to explore the appropriate new subgrade treatment process,the joint stress and mutual influence mechanism of the new and old subgrade,predict the settlement during the construction period and after construction,propose the uneven settlement control scheme,and successfully apply it to the reconstruction and expansion project of Hudi Avenue.The experience can be used for reference in the implementation of similar projects.