基坑开挖中门架式隔离桩对减小邻近地铁隧道影响的研究*
叶俊能11郦亮1郑翔2赵豫鄂2成怡冲2龚迪快2
Research on Frame Isolation Pile to Reduce the Influence of Foundation Pit Excavation on Adjacent Tunnel
YE JunnengLI LiangZHENG XiangZHAO Yu′eCHENG YichongGONG Dikuai
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作者信息:1.宁波市轨道交通集团有限公司，315101，宁波；
2.浙江华展工程研究设计院有限公司，315012，宁波
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Affiliation:Ningbo Rail Transit Group Co., Ltd., 315101, Ningbo, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2020.11.007
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中图分类号/CLCN:TU753.8
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栏目/Col:研究报告
摘要:
对宁波市轨道交通1号线世纪大道站—海晏北路站区间隧道附属隔离桩工程进行跟踪监测与有限元模型仿真计算，分析了设置门架式隔离桩后，基坑开挖对周边环境的影响规律。分析结果显示，基坑外设置门架式隔离桩后，由基坑开挖导致的支护桩侧移、坑外土体水平位移、地表沉降及邻近隧道位移等指标的变化规律，同未设置门架式隔离桩的基坑指标变化规律基本一致，但变形量显著减小。门架式隔离桩在基坑开挖期间对邻近隧道的保护效果显著。
Abstracts:
The tracking monitoring and finite element model simulation are carried out to the ancillary isolation pile project of Shi Hai tunnel of Ningbo rail transit line 1. The influence pattern of frame isolation piles on surrounding environment during foundation pit excavation is analyzed. The results show that the influence pattern of foundation pit excavation with frame isolation piles on retaining piles, soils outside the pit and adjacent tunnel are similar to those without frame isolation piles; however, the deformation value can be significantly reduced. The protective effect of frame isolation pile on adjacent tunnel during foundation pit excavation is evident.
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