东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (2): 126-135.DOI: 10.12068/j.issn.1005-3026.2025.20230244

• 资源与土木工程 • 上一篇    

近距离穿越既有车站不等强度注浆变形的控制

王述红, 任明珠(), 李世宇, 董福瑞   

  1. 东北大学 资源与土木工程学院,辽宁 沈阳 110819
  • 收稿日期:2023-08-27 出版日期:2025-02-15 发布日期:2025-05-20
  • 通讯作者: 任明珠
  • 作者简介:王述红(1969—),男,江苏泰州人,东北大学教授,博士生导师.
  • 基金资助:
    中国-中东欧国家高校联合教育项目(2021111);国家自然科学基金资助项目(52374157);中央高校基本科研业务费专项资金资助项目(N2301005)

Control of Unequal Strength Grouting Deformation During Close Distance Crossing of an Existing Station

Shu-hong WANG, Ming-zhu REN(), Shi-yu LI, Fu-rui DONG   

  1. School of Resources & Civil Engineering,Northeastern University,Shenyang 110819,China.
  • Received:2023-08-27 Online:2025-02-15 Published:2025-05-20
  • Contact: Ming-zhu REN

摘要:

由于隧道开挖对近距离既有车站结构变形产生不利影响,以沈阳砾砂层近距离穿越地铁车站为例,采用有限差分法对近距离下穿既有车站结构变形的影响机理和控制技术进行研究,对超前注浆小导管支护参数和不等强度注浆加固方法进行了优化.通过模拟等强度、横向不等强度和空间不等强度3种注浆方案,对既有结构的竖向位移、水平位移和应力进行分析.研究表明:空间不等强度注浆更为合理,既有结构的竖向位移、水平位移和应力降幅分别达到44.7%,53.7%和15.6%.此外,对空间不等强度注浆方法的影响因素进行讨论和分析,可为邻近既有车站的隧道开挖施工提供参考.

关键词: 近距离穿越, 既有车站, 不等强度注浆, 注浆加固, 数值模拟

Abstract:

Tunnel excavation has a detrimental impact on the deformation of existing station structures. Taking the close-proximity crossing an existing metro station in Shenyang’s gravel layer as an example, the finite difference method was used to investigate the deformation mechanisms and control techniques for such excavations. The support parameters for advanced grouting with small conduits and the method of unequal strength grouting reinforcement were optimized. Through simulations of three grouting schemes (uniform strength, lateral unequal strength, and spatial unequal strength), the vertical displacement, horizontal displacement, and stress of the existing structure were analyzed. The results indicate that spatial unequal strength grouting is the most reasonable approach, with reductions in vertical displacement, horizontal displacement, and stress of 44.7%, 53.7%, and 15.6%, respectively. Additionally, the influencing factors of the spatial unequal strength grouting method were discussed and analyzed, which can provide a reference for tunnel excavation near existing stations.

Key words: close distance crossing, existing station, unequal strength grouting, grouting reinforcement, numerical simulation

中图分类号: