| 客运专线机场路隧道下穿高架桥近接桩基施工位移控制技术 |
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| 引用本文： | 崔光耀,王明年,路军富,刘金松.客运专线机场路隧道下穿高架桥近接桩基施工位移控制技术[J].中国铁道科学,2011,32(3). |
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| 作者姓名： | 崔光耀 王明年 路军富 刘金松 |
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| 作者单位： | 1. 西南交通大学,土木工程学院,四川,成都,610031
2. 中国中铁二院工程集团有限责任公司,四川,成都,610031 |
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| 摘 要： | 以成都-绵阳-乐山客运专线机场路隧道下穿成都市蓝天立交桥工程中近接12根高架桥桩基为例,研究近接桩基施工位移控制技术.根据相关规范及相似工程研究成果,制定机场路隧道近接桩基沉降控制标准和水平位移控制标准.建立机场路隧道下穿高架桥段的仿真模型,依据工程地质情况和设计支护参数,确定计算模型物理力学参数,对近接桩基隧道施工进行开挖模拟计算.计算结果表明:12根近接桩基的沉降值和差异沉降值均小于预警值,但是水平位移值均大于允许值,必须采取加固措施才能进行施工.提出在机场路隧道两侧设置隔离桩的加固方案,并计算采取加固措施后的近接桩基沉降及水平位移值.结果表明:12根近接桩基沉降值和差异沉降值均有较大的减少,水平位移值亦大为减小且均小于预警值,机场路隧道可以正常施工.
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| 关 键 词： | 客运专线 隧道施工 下穿隧道 近接桩基 桩基位移 控制标准 加固措施 |
Adjacent Pile Foundation Construction Displacement Control Technology of Passenger Dedicated Line Jichang Road Tunnel Crossing under Viaducts |
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| CUI Guangyao,WANG Mingnian,LU Junfu,LIU Jinsong.Adjacent Pile Foundation Construction Displacement Control Technology of Passenger Dedicated Line Jichang Road Tunnel Crossing under Viaducts[J].China Railway Science,2011,32(3). |
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| Authors: | CUI Guangyao WANG Mingnian LU Junfu LIU Jinsong |
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| Institution: | CUI Guangyao1,WANG Mingnian1,LU Junfu1,LIU Jinsong2(1.School of Civil Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China,2.China Railway No.2 Engineering Group Limited Company,China) |
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| Abstract: | Twelve viaduct pile foundations are located in the vicinity of Jichang road tunnel of Chengdu-Mianyang-Leshan passenger dedicated line across Lantian viaduct in Chengdu.With the example,the construction displacement control technology of adjacent pile foundations was studied.Firstly,according to the relevant specifications and research results of similar engineering,the settlement and horizontal displacement control standards of adjacent pile foundation of passenger dedicated line Jichang road tunnel were e... |
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| Keywords: | Passenger dedicated line Tunnel construction Under-crossing tunnel Adjacent pile foundation Pile foundation displacement Control standard Reinforcement measure |
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