土工基础

土工基础 ›› 2023, Vol. 37 ›› Issue (5): 720-722.

• 工程实录 • 上一篇    下一篇

综合管廊深基坑稳定性研究

郑忠良1，于庭富1，刘 洋1，张泽浩2   

  1. （1.中国二十二冶集团有限公司路桥工程分公司，河北唐山 0640001；2.河北工程大学土木工程学院，河北邯郸 056038）
  • 收稿日期:2022-03-29 修回日期:2022-04-08 出版日期:2023-10-31 发布日期:2023-10-26
  • 作者简介:郑忠良（1979-），男，硕士，高工，研究方向为地下工程。
  • 基金资助:
    国家自然科学基金（51908178）

Stability of Deep Excavation of a Comprehensive Utility Culvert

ZHENG Zhongliang1, YU Tingfu1, LIU Yang1， ZHANG Zehao2   

  1. (1.Road and Bridge Engineering Branch of China 22 Metallurgy Group Co. Ltd., Tangshan 064000;
    2.School of Civil Engineering, Hebei University of Engineering, Handan 056038)
  • Received:2022-03-29 Revised:2022-04-08 Online:2023-10-31 Published:2023-10-26

摘要： 基于某综合管廊深基坑工程，通过有限元软件Midas-GTS NX建立有限元模型，分别对基坑开挖引起的桩身水平位移、周边地表沉降、内支撑轴力进行稳定性分析，结果表明：桩身最大水平位移为8.56 mm，出现在基底位置；周边地表沉降出现明显的“凹槽型”，且最大地表沉降为17 mm，出现在距基坑边线12 m位置处；第二道钢管内支撑轴力大于第一道混凝土内支撑轴力，符合设计值要求；模拟数据与实测数据较为吻合，基坑稳定性良好，可为后续施工提供指导。

关键词: 基坑, 稳定性, 综合管廊, 数值模拟

Abstract: This paper presents the finite element analysis results of a deep excavation stability for a comprehensive utility culvert by using commercial software MIDAS GTS NX. The horizontal displacement of the soldier pile induced by the excavation, the settlement of the surrounding ground, and the axial force of the inner support were evaluated. The results show that the maximum horizontal displacement of the soldier pile is 8.56mm, which is at the base position; the surrounding surface settlement has an obvious “groove type”, and the maximum surface settlement is 17mm, which is at the position 12m away from the edge of the excavated area. The supporting axial force is greater than the inner supporting axial force of the first layer of concrete strut, which meets the requirements of the design value; the simulated data is in good agreement with the measured data. The deep excavation has good stability, which can provide guidance for subsequent construction.

Key words: Deep Excavation, Stability, Comprehensive Utility Culvert, Numerical Simulation

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