刘莉, 张正, 刘军,等.小净距多线隧道并行掘进方案研究[J].河南理工大学学报（自然科学版）,doi:10.16186/j.cnki.1673-9787.2023070047.

LIU L, ZHANG Z, LIU J, et al.Study on parallel construction schemes for neighborhood multi-line tunnels[J].Journal of Henan Polytechnic University(Natural Science) ,doi:10.16186/j.cnki.1673-9787.2023070047.

小净距多线隧道并行掘进方案研究(网络首发)

刘莉1, 张正2, 刘军1, 欧臣1, 赵英博1, 赵伏田1

（1.河海大学 土木与交通学院，江苏 南京 210098；2. 中铁二十四局集团有限公司，上海 200040）

摘要:小净距多线隧道在轨道交通工程中频繁出现，但由于施工步骤繁多且掘进过程中影响因素较多，为此，需设计合理的小净距多线隧道并行掘进方案。本文在确定合理开挖方法基础上采用两种不同开挖顺序的并行掘进方案，通过建立三维有限元数值仿真模型，比较两种方案的隧道围岩应力与位移的发展规律。结果表明，开挖顺序对围岩间相互作用具有明显的影响，中隧的应力和变形受影响最大。依次开挖法与中隧先挖法拱腰处水平应力的变化规律基本一致，而对于拱顶处垂直应力，依次开挖法较中隧先挖法约增大40%左右;中隧先挖法的拱腰水平变形和拱顶沉降值较依次开挖法分别增大了23%和26%，但中隧先挖法开挖初期的沉降值较少;综合考虑衬砌结构的应力、变形及施工工期，现场可采用中隧先挖法进行施工，并结合现场监测结果证明该方法的合理性。以上研究结果可为类似小净距多线并行隧道工程的设计与施工提供参考。

关键词:小净距多线隧道;数值仿真模型;依次开挖法;中隧先挖法;现场监测

中图分类号：U455.4

doi:10.16186/j.cnki.1673-9787.2023070047

基金项目:国家自然科学基金项目（51874118）

收稿日期:2023-07-23

修回日期:2023-12-05

网络首发日期:2023-12-06

Study on parallel construction schemes for neighborhood multi-line tunnels（Online）

LIU Li1, ZHANG Zheng2, LIU Jun1, OU Chen1, ZHAO Yingbo1, ZHAO Futian1

1.College of Civil and Transportation Engineering，Hohai University，Nanjing  210098，Jiangsu，China；2.China Railway 24th Bureau Group Limited Company， Shanghai  200040， China

Abstract:Neighborhood multi-line tunnels frequently appear in rail transit engineering， but due to the numerous construction steps and many influencing factors during the excavation process， it is necessary to design a reasonable parallel excavation plan for neighborhood multi-line tunnels. Based on the reasonable excavation methods， this paper adopts two parallel excavation schemes with different excavation sequences. By establishing a three-dimensional finite element numerical simulation model， the surrounding rock stress and displacement between the two schemes are compared. The results indicate that the excavation sequence has a significant impact on the surrounding rocks interaction， with the stress and deformation of middle tunnel being the most affected. The variation pattern of horizontal stress at the arch waist of sequential excavation method and middle tunnel first excavation method is basically consistent， while the vertical stress at the arch crown of sequential excavation method increases by about 40% compared to middle tunnel first excavation method； The horizontal deformation of the arch waist and the settlement of the arch crown of middle tunnel first excavation method increased by 23% and 26% respectively compared to sequential excavation method， but the settlement value in the early stage of middle tunnel first excavation method is relatively small； Taking into account the stress， deformation， and construction period of lining structure， the middle tunnel first excavation method can be used on site， and the rationality of this method can be explained based on the field monitoring results. The above research results can provide reference for design and construction of parallel tunnels with neighborhood multi-line tunnels.

Key words:Neighborhood multi-line tunnels;Numerical simulation model;Sequential excavation method;Middle tunnel first excavation method;Field monitoring

CLC：U455.4