软土中浅埋顶管施工影响模拟分析

刘文壮; 李朝煌; 王伟志; 徐永福

doi:10.20265/j.cnki.issn.1007-2993.2024-0325

软土中浅埋顶管施工影响模拟分析

doi: 10.20265/j.cnki.issn.1007-2993.2024-0325

1.
上海交通大学土木工程系，上海　200240
2.
上海铁路枢纽建设指挥部，上海　200071

详细信息

作者简介:
刘文壮，男，1999年生，硕士，主要从事顶管隧道研究。E-mail：liuwenzhuang@sjtu.edu.cn

通讯作者:
徐永福，男，1967年生，博士，教授，主要从事非饱和土力学和特珠土地基处理科研与教学工作。E-mail：yongfuxu@sjtu.edu.cn

中图分类号: TU43；TU99
计量
- 文章访问数: 18
- HTML全文浏览量: 5
- PDF下载量: 3
- 被引次数: 0
出版历程
- 收稿日期: 2024-07-15
- 修回日期: 2024-08-20
- 录用日期: 2024-10-21
- 刊出日期: 2025-06-09

Simulation analysis of the impact of shallow buried top pipe construction in soft soil

1.
Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2.
Shanghai Railway Key Project Construction Headquarters, Shanghai 200071, China

摘要

摘要: 为了研究浅埋顶管在软土中顶进施工时对周围土体位移、土压力和超孔隙水压力的影响规律，以上海新建南联络线镇西路既有铁路过轨顶管施工项目为依托，采用有限元软件模拟顶进过程，同时分析注浆压力、管径和埋深等不同参数对周围土体的影响，并通过施工实测结果验证模拟分析结果。结果表明：顶管施工顶进时，管周土体离顶管距离越近，扰动程度越大，影响范围约为2倍管径；顶管施工中，注浆压力过大或过小均会对管周土体位移产生显著影响，管周土体的土水压力随注浆压力的增加而增大；顶管的管径与埋置深度不同，对管周土体的扰动也有一定影响。该研究可为类似工程提供参考。
- 顶管 /
- 数值模拟 /
- 施工影响 /
- 监测
Abstract: To investigate the influence of shallow-buried pipe jacking construction in soft soil on the displacement, earth pressure, and excess pore water pressure of surrounding soil, this study focuses on the railway undercrossing pipe jacking project at Zhenxi Road in Shanghai’s newly constructed South Connecting Line. Finite element software was utilized to simulate the pipe-jacking process, and the effects of critical parameters such as grouting pressure, pipe diameter, and burial depth on the surrounding soil were systematically analyzed. Field monitoring data validated the simulation results. Key findings reveal that during pipe jacking, soil closer to the pipe experiences greater disturbance, with the affected zone extending approximately twice the pipe diameter. Both excessive and insufficient grouting pressures significantly influence soil displacement, while increases in grouting pressure elevate both earth and pore water pressures in the surrounding soil. Furthermore, variations in pipe diameter and burial depth distinctly affect the magnitude of soil disturbance. This research provides practical insights for optimizing pipe-jacking construction in similar soft soil environments.
- pipe jacking /
- numerical simulation /
- construction impact /
- monitoring

HTML全文

图 1 镇西路卫星定位平面图

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图 2 有限元模型

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图 3 土压力分析点位置

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图 4 分析点土压力变化

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图 5 分析点超孔隙水压力变化

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图 6 顶进时竖向位移与注浆压力的关系

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图 7 固结沉降与注浆压力的关系

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图 8 顶管侧向1 m处土体水平位移变化情况

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图 9 土体竖向位移与顶管埋置深度的关系

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图 10 顶管侧向土体水平位移与土体深度的关系

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图 11 土体竖向位移与顶管管径的关系

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图 12 顶管侧向土体水平位移与土体深度的关系

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图 13 监测点布置平面图

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图 14 断面2监测点布置图

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图 15 土压模拟与实测值对比

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图 16 超孔隙水压力模拟与实测值对比

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图 17 管侧1 m土体侧向位移模拟与实测对比曲线

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表 1 土体参数

土层	厚度 /m	弹性模量 /MPa	泊松比	黏聚力 /kPa	内摩擦角/（°）	渗透系数 /（m·s⁻¹）	重度 /（kN·m⁻³）
填土	2.2	12	0.3	16	15	1.0×10^-8	19
淤泥质黏土	6.8	16	0.34	14	21	2.0×10⁻⁷	17.8
淤泥质黏土	6	23	0.38	17	13	3.0×10⁻⁸	17.7

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