东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (11): 115-124.DOI: 10.12068/j.issn.1005-3026.2025.20240242

• 资源与土木工程 • 上一篇    下一篇

盾构切削既有车站障碍桩体掘进参数优化数值模拟

贾蓬1(), 孙彬煜1, 朱利2, 宋立民2   

  1. 1.东北大学 资源与土木工程学院,辽宁 沈阳 110819
    2.中铁三局集团 第四工程有限公司,北京 102300
  • 收稿日期:2024-12-31 出版日期:2025-11-15 发布日期:2026-02-07
  • 通讯作者: 贾蓬
  • 基金资助:
    中央高校基本科研业务费专项资金资助项目(N25DCG007)

Numerical Simulation on Tunneling Parameter Optimization of Shield Machine in Cutting Obstacle Piles in Existing Stations

Peng JIA1(), Bin-yu SUN1, Li ZHU2, Li-min SONG2   

  1. 1.School of Resources & Civil Engineering,Northeastern University,Shenyang 110819,China
    2.The Fourth Engineering Co. ,Ltd. ,China Railway Third Bureau Group,Beijing 102300,China.
  • Received:2024-12-31 Online:2025-11-15 Published:2026-02-07
  • Contact: Peng JIA

摘要:

盾构机在下穿既有车站遭遇障碍桩体时,往往需要直接切削桩体通过,切桩时盾构机的掘进参数控制对于既有上部结构的安全性和稳定性至关重要.针对沈阳地铁下穿既有车站切桩施工工程,采用ABAQUS有限元数值模拟软件,模拟刀盘动态切削障碍桩体过程.结果表明,切桩过程中无论盾构机是驶向车站还是驶离车站,场切深指数和掘进比能均随推速的增加而增大;桩体钢筋被切断的长度随推速和转速的增加而增大,当推速小于0.35 mm/s时,切断长度小于350 mm的钢筋数量较多;刀盘转速超过0.140 rad/s后,长钢筋的数量明显增多;随着推速的增加,切桩时对周围桩体的扰动度也随之增加,在推速超过0.4 mm/s后应力扰动度显著增加.

关键词: 盾构穿越, 动态切桩, 钢筋切断, 掘进比能, 应力扰动度

Abstract:

When the shield machine encounters obstacle piles while tunneling beneath an existing station, it often needs to directly cut through the piles. During this process, the control of the shield machine’s tunneling parameters is crucial for ensuring the safety and stability of the existing upper structure. For the pile-cutting construction of the Shenyang Metro passing beneath existing stations, ABAQUS finite element numerical simulation software was used to simulate the dynamic cutting process of the cutterhead through the obstacle piles. The results show that during the pile-cutting process, whether the shield machine is advancing towards or away from the station, both the field penetration index (FPI) and the tunneling specific energy increase with the advancing speed. The length of the rebar cut during the pile-cutting process also increases with the advancing speed and cutterhead rotation speed. When the advancing speed is less than 0.35 mm/s, the number of rebars with lengths shorter than 350 mm is relatively high. However, when the cutterhead rotation speed exceeds 0.140 rad/s, the number of long rebars increases significantly. As the advancing speed increases, the disturbance degree to the surrounding piles also increases, and the disturbance degree notably increases when the advancing speed exceeds 0.4 mm/s.

Key words: shield tunneling, dynamic pile-cutting, rebar cutting, tunneling specific energy, stress disturbance degree

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