土工基础

土工基础 ›› 2023, Vol. 37 ›› Issue (3): 363-366.

• 工程实录 • 上一篇    下一篇

浅谈矩形顶管近距离穿越重要供水管道的施工影响分析

周丽红1，周兴龙2   

  1. （1.广州金土岩土工程技术有限公司，广州 510000；2.广东省工程勘察院，广州 510000）
  • 收稿日期:2022-03-15 修回日期:2022-03-18 出版日期:2023-06-30 发布日期:2023-07-03
  • 作者简介:周丽红（1988-），女，工程师，研究方向为大断面矩形顶管应用于地下空间开发中的设计、施工及科研。

Discussions on Construction Impact of Jacking a Large Cross Section Box Culvert Closely Cross Through an Important Water Supply Pipeline

ZHOU Lihong1, ZHOU Xinglong2   

  1. (1.Guangzhou Golden Soil Geotechnical Engineering Technology Co. Ltd., Guangzhou 510000;
    2.Guangdong Engineering Investigation Institute Co. Ltd., Guangzhou 510000)
  • Received:2022-03-15 Revised:2022-03-18 Online:2023-06-30 Published:2023-07-03

摘要： 以济南地铁站某出入口通道顶管工程为背景，建立矩形顶管施工对近距离管道影响的力学模型，并结合现场监测，以此浅析大断面顶管施工对近距离下穿城区主要供水管道的影响。得出以下结论：①矩形顶管施工时，管道的变形表现为先隆起后沉降，管道中部变形量最大，沿轴线向两边，变形量逐渐减小。②管道的变形随着顶管顶进长度的增加，主要分为3个阶段：隆起阶段—急剧沉降阶段—沉降稳定阶段，本工程管道急剧沉降阶段的顶进长度为15～35 m（管道位于顶进长度20 m处）。③随着顶进长度的增加，管道的轴向、径向应力均随之增大，顶管顶进长度为15～35 m之间时，管道应力急剧增大。

关键词: 大断面, 矩形顶管, 近距离穿越, 重要供水管, 施工影响

Abstract: This paper presents a box culvert jacking project at the exit of a Jinan subway station. The mechanical model of “the influence the box culvert jacking construction on the deformation and stress of the adjacent water supply pipeline” is therefore established. Combined with on-site monitoring, the analysis of the influence of large cross section pipe jacking construction closely passing through a main water supply pipeline in the urban area are also presented in the paper. The following conclusions are obtained: during the construction of the box culvert jacking, the deformation of the existing pipeline is first uplift and then settlement, the deformation in the middle of the existing pipeline is the largest, and the deformation decreases gradually along the axis to both sides. With the increase of the jacking length, the deformation of the existing pipeline is mainly divided into three stages: uplift stage, rapid settlement stage and stabilized settlement stage. The box culvert jacking length of the pipeline in the rapid settlement stage of the project is 15-35m (the pipeline is located at the jacking length of 20m). With the increase of jacking length, the axial and radial stresses of the pipeline increase. When the jacking length is between 15-35m, the pipeline stress increases sharply.

Key words: Large Cross Section, Box Culvert Jacking, Closely Crossing, Important Water Supply Pipe, Construction Impact

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