浅埋矩形顶管不良顶进姿态下的地层扰动研究

张振; 刘性帅; 阳翼繁; 晏启祥; 黄杰

doi:10.20265/j.cnki.issn.1007-2993.2024-0379

浅埋矩形顶管不良顶进姿态下的地层扰动研究

doi: 10.20265/j.cnki.issn.1007-2993.2024-0379

1.
山东高速工程建设集团有限公司，山东济南　250014
2.
西南交通大学交通隧道工程教育部重点实验室，四川成都　610031

基金项目: 国家自然科学基金项目（U21A20152）

详细信息

作者简介:
张　振，男，1981年生，大学本科，高级工程师。研究方向：隧道与地下工程。E-mail：122732083@qq.com

中图分类号: U45
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- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2024-08-19
- 修回日期: 2024-10-31
- 录用日期: 2025-01-02
- 网络出版日期: 2025-12-08
- 刊出日期: 2025-12-08

Stratum disturbance of rectangular pipe-jacking in shallow strata under adverse jacking attitude

1.
Shandong Hi-speed Engineering Construction Group Co., Ltd., Jinan 250014, Shandong, China
2.
Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

摘要

摘要: 顶管已经广泛应用于综合管廊、下穿隧道等地下工程的施工，由于地层不均、顶推力设置不当等原因，顶管顶进过程中易产生不良顶进姿态。为研究浅埋顶管在不良顶进姿态下对地层的扰动，依托成资大道综合管廊下穿高速公路工程，分别建立了考虑掌子面偏压、水平偏移轴线、竖向偏移轴线和机头发生扭转4种不良顶进情况的三维有限元分析模型。经三维有限元数值分析，得到以下结论：（1）掌子面偏压顶进对地表沉降位移影响不明显，横向位移，开挖面前方左侧位移稍大于右方，而纵向位移左侧比右侧略小；（2）发生水平偏移时，①号、③号监测点位移在掌子面通过前背离轴线，掌子面通过后朝向轴线；（3）顶进中发生竖直向下的偏移时，掌子面后方地表沉降相较于正常顶进会显著增大，而掌子面前方地表隆起较小；（4）顶进中发生机头扭转时，掌子面后方地表左侧横向位移小于右侧，但沉降位移比右侧更大。
- 顶管隧道 /
- 顶进姿态 /
- 地层扰动 /
- 开挖模拟
Abstract: Pipe-jacking has been widely used in the construction of underground projects such as utility tunnels and underpass tunnels. Due to uneven strata and improper setting of jacking force, adverse jacking attitude is easy to occur in the process of pipe-jacking. To study the stratum disturbance of pipe-jacking in shallow strata under adverse jacking attitude, based on the project of Chengdu Ziyuan Avenue utility tunnel underpass expressway, three-dimensional finite element analysis models considering four kinds of adverse jacking conditions, i.e. tunnel face bias, horizontal offset axis, vertical offset axis and machine head torsion, were established respectively. The following conclusions were obtained: (1) the influence of tunnel face bias jacking on surface settlement displacement was not obvious, the lateral displacement of the left side in front of the excavation face was slightly larger than that of the right side, while the longitudinal displacement of the left side was slightly smaller than that of the right side; (2) In case of horizontal deviation, the displacement of monitoring points ① and ③ deviates from the axis before the tunnel face passes through, and faces the axis after the tunnel face passes through; (3) When the vertical downward displacement occurs during the jacking, the ground subsidence behind the tunnel face will increase significantly compared with the normal jacking, while the ground uplift in front of the tunnel face is smaller; (4) When the machine head torsion occurs during jacking, the lateral displacement of the left side of the ground behind the face is less than that of the right side, but the settlement displacement is greater than that of the right side.
- pipe-jacking tunnel /
- jacking attitude /
- strata disturbance /
- excavation simulation

HTML全文

图 1 工程平面图

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图 2 管节断面图（单位：mm）

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图 3 数值模型和监测点布置

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图 4 莫尔−库仑本构模型屈服面

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图 5 模拟顶管施工过程

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图 6 地表沉降数值模拟和监测数据对比

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图 7 掌子面偏压地层Mises应力云图

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图 8 掌子面偏压地表位移纵向分布

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图 9 偏移水平轴线不同顶进阶段监测点位移

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图 10 偏移水平轴线地表位移横向分布（Z=18 m）

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图 11 偏移水平轴线地层Mises应力云图

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图 12 偏移水平轴线地表位移纵向分布

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图 13 偏移水平轴线各顶进阶段监测点位移变化

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图 14 偏移水平轴线不同顶进阶段地表各向位移横向分布（Z=18 m）

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图 15 竖向偏离轴线地层Mises应力云图

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图 16 机头扭转地表位移分布

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图 17 机头扭转监测点位移随顶进阶段变化

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图 18 机头扭转地层Mises应力云图

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图 19 机头扭转地表位移纵向分布

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图 20 机头扭转各顶进阶段监测点位移变化

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图 21 地表位移横向分布（Z=18 m）

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表 1 土体物理力学参数

土层名称	厚度H/m	重度γ/(kN·m⁻³)	黏聚力c/kPa	内摩擦角φ/(°)	弹性模量E/MPa
填筑土	3.1	20.0	10	25	4
粉质黏土Ⅰ	3.0	19.8	27	16	6.4
粉质黏土Ⅱ	4.7	18.9	9	8	3.0
强风化泥岩	4.0	22.0	40	20	25
中等风化泥岩	15.2	24.1	200	28	1500

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