线路重叠交叉段下部隧道联络通道冻结法施工对上部隧道的影响
唐震东
Influence of the Freezing Construction of Lower Tunnel Connecting Passage on Upper Tunnel at Overlapped and Crossing Line Section
TANG Zhendong
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作者信息:中铁建大桥工程局集团第二工程有限公司，518083，深圳
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Affiliation:The Second Engineering Co., Ltd., China Railway Construction Bridge Engineering Bureau Group, 518083, Shenzhen, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2020.05.022
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中图分类号/CLCN:U456.3+1
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栏目/Col:研究报告
摘要:
以某地铁线路隧道重叠交叉段联络通道施工为工程背景，针对下部隧道联络通道冻结法施工，建立Midas/GTS建立三维有限元模型，分析联络通道冻结法施工过程对上部隧道的影响。分析结果表明：下部隧道联络通道施工完成后，上部隧道最大沉降量为-0.322 mm，最大隆起量为0.211 mm，最大水平位移为-0.053 mm，均在安全可控范围内；上部隧道结构最大拉压应力也均满足强度要求。
Abstracts:
Based on a tunnel connecting passage engineering constructed with freezing method at the overlapped and crossing metro line section, a 3D finite element model by using Midas/GTS software is established to analyze the influence of the lower tunnel connecting passage constructed with freezing method on the upper metro tunnels. The results show that after the construction of the lower tunnel connecting passage, the maximum settlement of the upper tunnel is -0.322 mm, the uplift and the horizontal displacement are 0.211 mm and -0.053 mm respectively, all in the controllable range. The maximum tension and compression stress of the upper tunnel structure also meets the strength requirements.
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