Mechanics Influence of New Tunnel Intrusion on Pile Foundation in Complex Underground Environment

岳健; 冷伍明; 薛保国; 安永林

doi:10.13409/j.cnki.jdpme.2017.01.015

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Mechanics Influence of New Tunnel Intrusion on Pile Foundation in Complex Underground Environment

更新时间：2025-12-11

- Mechanics Influence of New Tunnel Intrusion on Pile Foundation in Complex Underground Environment
- Vol. 37, Issue 1, Pages: 105-112(2017)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2017.01.015
  CLC： U473.1;U456.3
- Published：2017
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[1]岳健,冷伍明,薛保国,安永林.复杂地下环境中新建隧道侵入对桩基的力学影响[J].防灾减灾工程学报,2017,37(01):105-112.

岳健, 冷伍明, 薛保国, et al. Mechanics Influence of New Tunnel Intrusion on Pile Foundation in Complex Underground Environment[J]. 2017, 37(1): 105-112.
[1]岳健,冷伍明,薛保国,安永林.复杂地下环境中新建隧道侵入对桩基的力学影响[J].防灾减灾工程学报,2017,37(01):105-112. DOI： 10.13409/j.cnki.jdpme.2017.01.015.

岳健, 冷伍明, 薛保国, et al. Mechanics Influence of New Tunnel Intrusion on Pile Foundation in Complex Underground Environment[J]. 2017, 37(1): 105-112. DOI： 10.13409/j.cnki.jdpme.2017.01.015.

摘要

在多层多种地下结构相互作用的复杂环境中

新建隧道施工侵入到地下街群桩基础的内部

具有较高的工程风险。通过数值模拟与现场实测

重点研究新建隧道侵入过程对地下街桩位移与内力的影响。结果表明:开挖正洞下部会使与导洞初衬底板相交处的桩段弯矩急剧增大;截桩后

置于正洞上拱部衬砌中的残留桩段轴力明显减小

而衬砌的最小主应力明显增大;与不存在地铁隧道时相比

附近存在地铁隧道时的新建隧道施工引起的地下街桩基沉降会减小

应考虑第三方地下结构的作用。该研究结论可为新建隧道穿越复杂地下结构体系的灾害预防提供参考。

Abstract

In complex underground environment of multilayer and multiple subsurface structures interaction

the new tunnel intrudes into the underground street piles

which might induce higher risk.The effects of the new tunnel intrusion process on displacements and internal forces of the underground street piles were studied by numerical simulation and field monitoring.The research shows:when excavating the lower part of the master cave

the moment of the pile section contacting the initial lining baseboard of pilot tunnel has a sharp increase;afer cutting pile

the axial force of the pile residual section in the lining of upper arch of the master cave has a obvious decrease

but the minimum principal stress of the lining has a obvious increase;compared with no existing subway tunnel

when the subway tunnel exists

the settlement of the pile foundation of the underground street will decrease for constructing new tunnel

the function of the third subsurface structure should be considered.The research conclusions could provide references for the disaster prevention of the new tunnel crossing the complex subsurface structures.

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references

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