摘要
运营阶段桥梁发生下沉病害的原因有很多,除因地层滑动原因外大多与地基承载力关系密切。通过对桥下回填厚层杂填土引起桥墩下沉的变形规律分析以及对回填土沉降产生的附加荷载的计算,认为造成某特大桥桥墩下沉的主要原因是基础承受了太大的附加荷载。通过沉降分析,认为当前变形已经趋于稳定。但为了大桥运营安全,建议继续进行沉降监测,并且做好相应之处的排水通道。
There are many reasons for the subsidence of bridges in the operation stage, except for the stratum slip, most of them are closely related to the bearing capacity of foundation. Based on the analysis of deformation law of pier subsidence caused by backfill thick layer of miscellaneous soil under the bridge and the calculation of additional load caused by backfill settlement, it is concluded that the main cause of the pier subsidence of the long-span bridge is that the foundation bears too much additional load. Through settlement analysis, it is concluded that the current deformation has become stable. However, to ensure the safety of the bridge operation, it is recommended to continue settlement monitoring and make appropriate drainage channels.
作者
朱占龙
王秉勇
王瑜
ZHU Zhanlong;WANG Bingyong;WANG Yu(China Railway Northwest Scientific Research Institute Co.,Ltd.,Lanzhou 730000,China)
出处
《路基工程》
2020年第1期196-201,共6页
Subgrade Engineering
关键词
桥下回填土
铁路桥
桥墩沉降
附加荷载
影响分析
backfill under the bridge
railway bridge
pier subsidence
additional load
influence analysis