铁道科学与工程学报2016，Vol.13Issue(12)：2471-2477,7.
盾构下穿铁路桥涵变形规律及控制技术研究
Rules and control technology of deformation caused by shield tunnel under-passing the railway bridge culvert
摘要
Abstract
In the engineering background of the Jinan rail transit line R1 line Yufu River Station ~Wangfu-zhuang station shield tunnel under-passing the Beijing-Shanghai railway frame bridge.With the help of FLAC3D,the deformation and stress of the bridge structure is simulated numerically and the characteristics of railway track deformation are analyzed.The calculation results show that the maximum compressive stress of bridge is 5.06 MPa in the position of the column above the left line of the shield at the process of under-passing bridge,and the maximum tensile stress of bridge is 1.00 MPa at the top of the bridge culvert right side;sedimen-tation value of the bridge culvert through the process reached 5.81 mm.These results all meet the stress and de-formation control standards.Based on the final deformation curves of track structure above bridge culvert and de-formation time history curves of track at the top of the left and right lines.It is concludecl that the rail track close to construction side get settlement before the other tracks,the final settlement value increases with the excavation direction to 3.76 mm.Combined with the results of the analysis,construction control technologies and monitoring and control schemes are proposed for the shield tunnel under-passing the railway bridge culvert.The scope of 20 m is determined as the key monitoring area and settlement control standards for the construction of Jinan rail tran-sit are presented.关键词
盾构隧道/下穿桥涵/数值模拟/轨道变形/沉降标准Key words
shield tunnel/under-passing the bridge culvert/numerical simulation/track deformation/settlement standard分类
交通工程引用本文复制引用
王国富,王建,路林海..盾构下穿铁路桥涵变形规律及控制技术研究[J].铁道科学与工程学报,2016,13(12):2471-2477,7.基金项目
山东省自然科学基金资助项目 （）
