土工基础

土工基础 ›› 2022, Vol. 36 ›› Issue (3): 427-431.

• 专题论述 • 上一篇    下一篇

旁侧深基坑盾构形式的综合管廊影响分析

熊署丹1，杨兰强2，许 达1，熊楚炎1   

  1.  (1.宁波市民用建筑设计研究院有限公司,浙江宁波 315010；2.宁波城建设计研究院有限公司,浙江宁波 315000)
  • 收稿日期:2022-02-28 修回日期:2022-03-06 出版日期:2022-06-30 发布日期:2022-06-24
  • 作者简介:熊署丹(1990-)，女，硕士，工程师，研究方向为岩土工程设计。

Analysis of Combined Utility Gallery of a Shield Tunnel Near a Deep Excavation

XIONG Shudan1, YANG Lanqiang2, XU Da1, XIONG Chuyan1   

  1. (1.Ningbo Civil Architectural Design Research Co. Ltd., Ningbo 315010;
    2.Ningbo Urban Construction Design & Research Institute Co. Ltd., Ningbo 315000)
  • Received:2022-02-28 Revised:2022-03-06 Online:2022-06-30 Published:2022-06-24

摘要： 深基坑开挖属于不断卸荷过程，容易引起邻近综合管廊的竖向偏移和水平位移。当综合管廊盾构区间段变形过大时，会导致管廊防火分隔部漏水或管廊构造破裂，进而影响管廊的正常工作。借助大型商用有限元软件MIDAS GTS，分析了软土地区大型深基坑开挖对邻近综合管廊盾构隧道的变形影响。通过三维有限元分析与现场监测结果对比分析，结果表明，采用钻孔灌注桩加另一道混凝土内支撑（下挂）的支护方法，在淤泥质土的深基坑变形抑制方面起着良好效果。

关键词: 淤泥土, 深基坑, 综合管廊, 盾构, 数值模拟

Abstract: During constant unloading inside a deep excavation, the vertical and horizontal displacements at the adjacent combined utility gallery will occur. When the deformation of the combined utility gallery is excessive, it might cause the leakage at the deformation joints of the gallery and cracks within the utility gallery structure, thus, affect the normal operation of the utility gallery. This paper presents threedimensional finite element analysis results by using commercial software MIDAS GTS NX. The influence of large deep excavation on the deformation of the adjacent combined utility gallery in soft soil area is evaluated. The results of 3D FEM analysis and field monitoring were compared. The results show that the supporting option of bored pile plus a concrete strut (hanging from the bottom) has a good effect on the deformation control of the deep excavation in soft soils.

Key words: mucky soil, deep excavation, combined utility gallery, shield tunnel, numerical simulation

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