地铁大跨暗挖隧道下穿桥隧结构变形影响分析
宋艺
Structural Deformation Effect of Large-span Underground Excavation Tunnel Crossing Bridge and Tunnel
SONG Yi
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作者信息:陕西省铁道及地下交通工程重点实验室(中铁一院),710043,西安
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Affiliation:Shaanxi Provincial Key Laboratory of Railway and Underground Traffic Engineering (FSDI),710043, Xi′an, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2019.05.029
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中图分类号/CLCN:U25；U24
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栏目/Col:研究报告
摘要:
以某地铁工程中单洞双线暗挖隧道下穿桥隧结构为例，通过实测数据分析及数值模拟验证，得出：在现有施工方法及地层条件下，上部既有桥隧结构的变形整体符合Peck单凹槽曲线，其中既有隧道结构沉降曲线比既有桥梁结构沉降曲线更接近Peck公式；地层损失率在0.20%~0.24%之间。分析结果说明，三维数值模拟可较为准确地预测上覆既有桥隧结构的沉降趋势，模拟结果与实测值差异较小。
Abstracts:
Focusing on the deformation characteristics of bridge and tunnel structure when the large-span underground excavation tunnel crossing under them simultaneously, based on a double-tracked single-bored metro tunnel, the measured data are analyzed and validated with numerical simulation. It is concluded that in the fixed conditions of construction and stratum, the whole deformation of the upper existing bridge and tunnel structure conforms to Peck single groove curve, in which the subsidence curve of tunnel structure is closer to Peck formula than that of the bridge structure; according to the fitting data, the ground loss ratio in this condition ranges from 0.2% to 0.24%. A three dimensional numerical simulation could predict accurately the settlement trend of the upper bridge and tunnel structure, and simulation result has only slight difference from the measured data.
引文 / Ref:
宋艺.地铁大跨暗挖隧道下穿桥隧结构变形影响分析[J].城市轨道交通研究，2019，22(05):133.
SONG Yi.Structural Deformation Effect of Large-span Underground Excavation Tunnel Crossing Bridge and Tunnel[J].Urban Mass Transit，2019，22(05)：133.
SONG Yi.Structural Deformation Effect of Large-span Underground Excavation Tunnel Crossing Bridge and Tunnel[J].Urban Mass Transit，2019，22(05)：133.
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