盾构隧道近距离下穿立交桥施工影响分析及控制
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摘要
以合肥轨道交通2号线青阳路站—西园路站盾构区间下穿五里墩立交桥为工程背景,通过盾构施工时的地层-桩基变形分析和全桥上部结构受力及变形分析,提出了适合本工程盾构施工时的地层损失率控制指标、桥梁基础差异沉降控制指标,以及穿越施工时的针对性保护措施,保证了该工程的顺利实施,也为合肥轨道交通建设积累了重要经验。
Taking the shield tunnel section between Qingyang Road Station and Xiyuan Road Station on Hefei rail transit Line 2 as the engineering background, which crosses under the Wulidun Flyover at close range, and through analyzing the stratum-pile deformation, the stress and deformation of the upper bridge structure during shield construction, the control indexes of formation loss rate and bridge foundation differential settlement suitable for the project, the targeted protection measures during the shield tunneling crossing under the bridge are proposed. These measures ensure the smooth implementation of the project, and accumulate important experiences for the construction of urban rail transit in Hefei City.
Taking the shield tunnel section between Qingyang Road Station and Xiyuan Road Station on Hefei rail transit Line 2 as the engineering background, which crosses under the Wulidun Flyover at close range, and through analyzing the stratum-pile deformation, the stress and deformation of the upper bridge structure during shield construction, the control indexes of formation loss rate and bridge foundation differential settlement suitable for the project, the targeted protection measures during the shield tunneling crossing under the bridge are proposed. These measures ensure the smooth implementation of the project, and accumulate important experiences for the construction of urban rail transit in Hefei City.
引文
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[6] 杨超,黄茂松,刘明蕴.隧道施工对临近桩基影响的三维数值分析[J].岩土力学与工程学报,2007 ,26(增刊1):2601.
[2] 付静.地铁盾构侧穿桥桩基施工技术[J].石家庄铁道学院学报(自然科学版),2009,22(4):95.
[3] 陈江,陈思明,傅金阳,等.盾构侧穿邻近桥桩施工影响及加固措施研究[J].公路交通科技,2016,33(7):97.
[4] 国家铁路局.公路与市政工程下穿高速铁路技术规程:TB 10182—2017[S].北京:中国铁道出版社,2017.
[5] 兰宇,方勇,段绍和,等.地铁盾构隧道侧穿锦江大桥施工的三维数值模拟[J].铁道工程学报,2009 ,26(3):79.
[6] 杨超,黄茂松,刘明蕴.隧道施工对临近桩基影响的三维数值分析[J].岩土力学与工程学报,2007 ,26(增刊1):2601.