超大直径盾构隧道穿越桥梁桩基影响研究
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摘要
以深圳春风隧道超大直径盾构掘进穿越春风高架桥桩基项目为背景,通过三维数值模拟分析,研究了盾构掘进参数及地基加固措施对桥梁桩基位移及受力的影响。结果表明,掘进参数(如掘进工作面推力和注浆压力)的改变会对桥梁桩基变形与受力产生不同程度的影响,同时桩基加固能有效减小地表和桩基的沉降与弯矩,但会增大桩基轴力。
Based on the project of super large diameter shield tunneling through a bridge pile foundation in Shenzhen,the influence of large diameter shield tunneling parameters and foundation reinforcement measures on the displacement and force of bridge pile foundation is studied by means of a 3-d numerical simulation. The analysis results show that the change of tunneling parameters will have a certain effect on the deformation and force of the bridge pile foundation,and the pile foundation reinforcement can effectively reduce the displacement and bending moment of the ground and pile foundation,but axial force of the pile foundation will be increased.
Based on the project of super large diameter shield tunneling through a bridge pile foundation in Shenzhen,the influence of large diameter shield tunneling parameters and foundation reinforcement measures on the displacement and force of bridge pile foundation is studied by means of a 3-d numerical simulation. The analysis results show that the change of tunneling parameters will have a certain effect on the deformation and force of the bridge pile foundation,and the pile foundation reinforcement can effectively reduce the displacement and bending moment of the ground and pile foundation,but axial force of the pile foundation will be increased.
引文
[1]张文正.北京地铁14号线大直径盾构隧道下穿机场线桥桩结构变形及其控制研究[D].北京:北京交通大学,2012.
[2]李松,杨小平,刘庭金.广州地铁盾构下穿对近接高架桥桩基的影响分析[J].铁道建筑,2012(7):74-78.
[3]周济民.盾构区间隧道下穿高架桥桩基群施工技术与环境影响预测[J].现代隧道技术,2016,53(1):165-172.
[4]朱逢斌,杨平,ONG C W.盾构隧道开挖对邻近桩基影响数值分析[J].岩土工程学报,2008,30(2):298-302.
[5]芮勇勤,岳中琦,唐春安,等.隧道开挖方式对建筑物桩基影响的数值模拟分析[J].岩石力学与工程学报,2003,22(5):735-741.
[6]杨晓杰,邓飞皇,聂雯,等.地铁隧道近距穿越施工对桩基承载力的影响研究[J].岩石力学与工程学报,2006,25(6):1290-1295.
[2]李松,杨小平,刘庭金.广州地铁盾构下穿对近接高架桥桩基的影响分析[J].铁道建筑,2012(7):74-78.
[3]周济民.盾构区间隧道下穿高架桥桩基群施工技术与环境影响预测[J].现代隧道技术,2016,53(1):165-172.
[4]朱逢斌,杨平,ONG C W.盾构隧道开挖对邻近桩基影响数值分析[J].岩土工程学报,2008,30(2):298-302.
[5]芮勇勤,岳中琦,唐春安,等.隧道开挖方式对建筑物桩基影响的数值模拟分析[J].岩石力学与工程学报,2003,22(5):735-741.
[6]杨晓杰,邓飞皇,聂雯,等.地铁隧道近距穿越施工对桩基承载力的影响研究[J].岩石力学与工程学报,2006,25(6):1290-1295.