盾构隧道下穿交叉市政管线地表沉降分析与控制
周绍宾1,2郭佳奇1,2徐冲3
Analysis and Control of Ground Surface Settlement of Shield Tunnel Under-passing Cross Municipal Pipeline
ZHOU ShaobinGUO JiaqiXU Chong
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作者信息:1.1.河南理工大学土木工程学院， 454002， 焦作；
2.2.地下工程与灾变防控河南省重点实验室， 454002， 焦作；
3.3.中铁第一勘察设计院集团有限公司一院桥隧处， 710043， 西安
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Affiliation:School of Civil Engineering, Henan Polytechnic University, 454002, Jiaozuo, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2021.08.009
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中图分类号/CLCN:TU433
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栏目/Col:研究报告
摘要:
依托厦门地铁3号线翔安行政中心站—浦边站区间隧道下穿箱涵和管线共同沟的工程实例，运用MidasGTS有限元软件模拟盾构隧道施工过程中排水箱涵及管线共同沟的结构变形与地表沉降响应特征，提出了既有构筑物变形与地表沉降控制的有效技术措施。研究结果表明,先平行后斜穿于隧道上方的管线共同沟最大变形出现在隧道左右线偏左线位置，对称左右线横跨于隧道上方的箱涵最大变形出现在左右线中间位置；盾构接近和离开构筑物一定范围内，地表差异沉降率突变；地表突增变形发生时间点T1可以作为沉降控制关键时间节点。
Abstracts:
Taking the engineering example of the interval tunnel of Xiang′an Administrative Center Station and Pubian Station of Xiamen Metro Line 3 under-passing utility tunnel of drainage culvert and pipeline trench, the Midas-GTS finite element software is adopted to simulate the structure deformation and ground surface settlement response characteristics of the utility tunnel during shield tunnel construction. Effective technical measures for controlling existing structure deformation and ground surface settlement are proposed. Research results show that for the pipeline trench going first parallel to then above the tunnel, maximum deformation occurs on left side of the left and right lines of the tunnel; while for the culvert straddling symmetrically above the tunnel, maximum deformation occurs in the middle of the left and right lines. Within certain range of shield arriving and departing from the structure, ground surface differential settlement rate demonstrates sudden change; the time point T1 when surface sudden increase deformation occues can be used as the key time node for settlement control.
时评 / Commentary
引文 / Ref:
周绍宾，郭佳奇，徐冲.盾构隧道下穿交叉市政管线地表沉降分析与控制[J].城市轨道交通研究，2021，24(8):41.
ZHOU Shaobin，GUO Jiaqi，XU Chong.Analysis and control of ground surface settlement of shield tunnel under-passing cross municipal pipeline[J].Urban Mass Transit，2021，24(8)：41.
ZHOU Shaobin，GUO Jiaqi，XU Chong.Analysis and control of ground surface settlement of shield tunnel under-passing cross municipal pipeline[J].Urban Mass Transit，2021，24(8)：41.
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