跨线桥桩基施工对既有高速公路影响的有限元分析

发布时间：2018-05-03 19:31

本文选题：跨线桥 + 桩基　；参考：《中外公路》2015年02期

【摘要】：经济发达地区的高速公路已经进入跨线立交桥的密集建设时期,为了更好地理解跨线桥桩基施工对被跨既有高速公路的影响,该文利用有限元方法分析了在建跨线桥桩基施工对被跨既有高速公路土质边坡、路面稳定及变形的影响,并且分析了全部桩体施工完成后对原有施工场地地表的变形影响。分析结果表明:跨线桥桩基的施工使被跨既有高速公路土质边坡产生潜在滑动面,并使路面产生向路面中心方向的水平位移及不均匀沉降;桩基全部施工完成后,对临近原施工场地土体产生显著的扰动;距离坡脚越远的桩体施工对既有高速公路的影响越小,当距离大于一定值时,该影响可以忽略。
[Abstract]:The expressway in the economically developed areas has already entered the intensive construction period of cross line overpasses. In order to better understand the influence of the bridge pile foundation construction on the existing expressway, the paper uses the finite element method to analyze the influence of the pile foundation construction on the soil slope of the existing expressway, the stability and deformation of the pavement. The effect of all piles on the surface deformation of the original construction site after the completion of the pile construction is analyzed. The results show that the construction of the bridge pile foundation makes the potential sliding surface of the soil slope across the existing expressway, and causes the horizontal displacement and uneven settlement of the pavement to the center direction of the pavement; after all the construction of the pile foundation is completed, it is close to the original. The soil mass of the construction site has a significant disturbance; the farther the pile construction from the foot of the slope is, the smaller the influence of the existing expressway, and the effect can be ignored when the distance is greater than a certain value.

【作者单位】：河海大学岩土力学与堤坝工程教育部重点实验室;河海大学土木与交通学院;上海市政工程设计研究总院(集团)有限公司南京分公司;
【基金】：国家自然科学基金资助项目(编号:51079052) 中央高校基本科研业务费专项资金资助项目(编号:2012B03014)
【分类号】：U445.551

【参考文献】