轨道梁支座对盾构法隧道结构受力的影响分析
杨醒宇
Analysis of Influence on Internal Force of Shield Tunnel Structure under Action of Track Beam Support
YANG Xingyu
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作者信息:中铁四院集团西南勘察设计有限公司， 650000， 昆明
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Affiliation:China Railway Siyuan Southwest Survey and Design Group Co., Ltd., 650000, Kunming, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2021.05.026
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中图分类号/CLCN:U121
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栏目/Col:研究报告
摘要:
结合工程实际情况，运用有限元方法，针对跨座式单轨轨道梁支座对盾构隧道结构内力的影响进行了分析。结果表明：在轨道梁支座作用下，盾构法隧道底部弯矩分布由正弯矩转变为负弯矩，底部轴力明显减小，底部剪力增大且局部急剧变化；轨道梁支座荷载作用对盾构隧道圆心以上结构影响较小；环间螺栓采用8.8级，可满足轨道梁支座处盾构管片抗剪承载力要求，且安全余量较大。
Abstracts:
Considering actual situation in engineering projects, the influence of straddle monorail track beam support on the internal force of shield tunnel structure is studied with finite element method. Research results show that: under the action of track beam support, the bending moment distribution at the bottom of shield tunnel changes from positive to negative, and the bottom axial force of shield tunnel decreases evidently, and the bottom shear increases and changes drastically in certain part; the support load of track beam has little effect on the structure above the center of shield tunnel; with the adoption of grade 8.8, the shear capacity of shield tunnel segment at track beam support can meet the stress requirements, and the safety margin is large.
引文 / Ref:
杨醒宇.轨道梁支座对盾构法隧道结构受力的影响分析[J].城市轨道交通研究，2021，24（5）：127.
YANG Xingyu.Analysis of Influence on Internal Force of Shield Tunnel Structure under Action of Track Beam Support[J].Urban mass transit，2021，24（5）：127.
YANG Xingyu.Analysis of Influence on Internal Force of Shield Tunnel Structure under Action of Track Beam Support[J].Urban mass transit，2021，24（5）：127.
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