国道改建工程对地铁盾构隧道的影响分析

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【摘    要】:考虑上方基坑开挖对地铁区间隧道的影响,以235国道杭州老余杭—五常段改建工程为例,根据地铁现状制定变形控制标准,通过理论及有限元数值分析,对基坑各个阶段施工工况下盾构隧道的变形进行分析并根据计算及施工工况提出可行性建议。

【关键词】:盾构;隧道;基坑;地铁;国道

【中图分类号】:U456.3 【文献标志码】:C 【文章编号】:1008-3197(2023)02-30-04

【DOI编码】:10.3969/j.issn.1008-3197.2023.02.007

Influence Analysis of National Highway Reconstruction Project on the Subway Shield Tunnel

ZHOU Xingang

(China Railway Liuyuan Group Co.Ltd.,Tianjin 300308, China)

【Abstract】:Considering the impact of the excavation of the upper foundation pit on the subway section tunnel, the paper takes the reconstruction project of the old Yuhang-Wuchang section of National Highway 235 in Hangzhou as an example, formulates the deformation control standard according to the status of the subway. Through theoretical and finite element numerical analysis, the paper analyzes the deformation of shield tunnel under various construction conditions of foundation pit, and puts forward feasible suggestions according to the calculation and construction conditions.

【Key words】:shield; tunnel; foundation pit; subway; national highway

随着城市轨道交通发展和地下空间开发利用,地铁隧道附近的基坑工程或基坑工程附近的轨道交通愈发常见,基坑开挖或隧道下穿会引起邻近既有盾构隧道或既有建筑物纵向变形、横向收敛、沉降等,严重时甚至引起隧道、建筑物结构破坏。(剩余4904字)

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