综合管廊基坑围护结构横跨既有浅埋隧道的影响分析
Analysis on the Influence of the Comprehensive Pipe Gallery Foundation Pit Enclosure Structure Crossing Existing Shallow-buried Tunnels
闫坤伐1
作者信息
- 1. 中铁第五勘察设计院集团有限公司,北京 102600
- 折叠
摘要
为探明新建综合管廊施工对既有浅埋隧道的影响,文章依托天水某综合管廊横跨既有浅埋隧道工程,利用有限元软件建立了综合管廊和浅埋隧道的整体模型,进行了桩顶放坡段开挖、围护桩施工、基坑开挖、基坑回填、通车运营期等多种工况的有限元计算.计算结果显示,在综合管廊明挖基坑施工全过程中,虽然会对下伏浅埋隧道造成一定影响,但结构安全控制指标均在规范要求范围内,影响程度可控.
Abstract
In order to explore the influence of the construction of the newly-built comprehensive pipe gallery on the existing shallow-buried tunnel,based on a comprehensive pipe gallery across the existing shallow-buried tunnel engineering in Tianshui,this paper uses finite element software to establish the overall model of the comprehensive pipe gallery and the shallow-buried tunnel.The finite element calculation of various working conditions such as pile top slope section excavation,retaining pile construction,foundation pit excavation,foundation pit backfilling,and opening operation period is carried out.The calculation results show that in the whole construction process of the open-cut foundation pit in the comprehensive pipe gallery,although it will have a certain influence on the underlying shallow-buried tunnel,the structural safety control indicators are all within the scope of the specification requirements,and the degree of influence is controllable.
关键词
综合管廊/明挖基坑/围护结构/浅埋隧道/数值模拟Key words
comprehensive pipe gallery/open-cut foundation pit/enclosure structure/shallow-buried tunnel/numerical simulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据