Analysis of Deformation Effect of Underpass Cross Tunnel Caused by Foundation Pit Excavation

  • Xie Qiang ,
  • Ma Yuanjie ,
  • Wu Jun ,
  • Xue Xiaoqiang ,
  • Tu Zhengnan
Expand
  • 1. School of Civil Engineering, Chongqing University, Chongqing 400045, P.R. China;
    2. National Joint Engineering Research Center of Geohazards Prevention Areas (Chongqing), Chongqing 400045, P.R. China;
    3. Power Construction East China Survey and Design Institute (Zhengzhou) Co., Ltd., Zhengzhou, 450003, P.R. China;
    4. Zhejiang Jiangnan Engineering Management Co., Ltd., Hangzhou, 310013, P.R. China

Received date: 2024-02-07

  Online published: 2024-10-31

Abstract

Taking the transfer hall project of a subway station as an example, FLAC3D numerical simulation software was used to analyze and summarize the influence law of the excavation of the deep excavation of the upper span on the deformation of the underpass three-dimensional cross tunnel with different spatial distances and distribution forms. Combined with the field monitoring data and the mutual verification of the numerical simulation results, the results showed that: (1) The effect of excavation unloading on the structural deformation of the tunnel is mainly manifested as vertical displacement, and its deformation is closely related to the spatial position of the foundation pit and the unloading amount of the rock-soil mass of the foundation pit; (2) The monitoring data of the whole construction cycle of the left and right tunnels of Line 1 are in good agreement with the numerical simulation results, which verifies the accuracy of the judgment of the influence of the numerical calculation method on construction activities; (3) The vertical displacement of the cascade tunnel coupled with multiple stress states is significantly affected by superposition effect, and the maximum vertical displacement is located in the area with many influencing factors, and the maximum vertical displacement is 34.84 mm; (4) Tunnels with shallow burial depth are more sensitive to construction disturbance than those with deep burial depth. The deformation dispersion at different locations is stronger, and the deformation has certain integrity and coordination.

Cite this article

Xie Qiang , Ma Yuanjie , Wu Jun , Xue Xiaoqiang , Tu Zhengnan . Analysis of Deformation Effect of Underpass Cross Tunnel Caused by Foundation Pit Excavation[J]. Chinese Journal of Underground Space and Engineering, 2024 , 20(5) : 1695 -1705 . DOI: 10.20174/j.JUSE.2024.05.26

References

[1] 王明年, 胡萧越, 唐雄俊, 等. 大直径盾构铁路隧道火灾温度荷载及结构内力特性研究[J]. 现代隧道技术, 2021, 58(1): 1-9. (Wang Mingnian, Hu Xiaoyue, Tang Xiongjun, et al. Research on fire temperature loading and structural internal force characteristics of large diameter shield railroad tunnel[J]. Modern Tunneling Technology, 2021, 58(1): 1-9. (in Chinese))
[2] 袁运涛, 李苏春. 临近地铁车站深基坑开挖综合控制研究[J]. 地下空间与工程学报, 2013, 9(4): 843-847. (Yuan Yuntao, Li Suchun. Research on comprehensive control of deep foundation pit excavation near subway station[J]. Journal of Underground Space and Engineering, 2013, 9(4): 843-847. (in Chinese))
[3] 沈雯, 沈蓉, 孙廉威. 超深基坑分区开挖对侧方地铁影响的实测分析[J]. 地下空间与工程学报, 2019, 15(增1): 354-360. (Shen Wen, Shen Rong, Sun Lianwei. Measured analysis of the impact of ultra-deep foundation pit zoned excavation on lateral subway[J]. Journal of Underground Space and Engineering, 2019, 15(Supp.1): 354-360. (in Chinese))
[4] Sun H, Wu J, Zhang J, et al. Deformation analysis of a new subway transfer channel closely undercrossing an existing station[J]. Advances in Civil Engineering, 2023, 2023: 5668254.
[5] Yang M, Li H, Li N, et al. Influence of utility tunnel on the lower part of the existing double-track shield tunnel in loess soil[J]. Advances in Materials Science and Engineering, 2021, 2021: 9927245.
[6] Zeng L, Zhang D, Lian C, et al. Study on the influence of an under-crossing parallel double-line shield tunnel on the existing tunnel structure[J]. Mathematics, 2023, 11(14): 3125.
[7] 刘英男, 雷华阳, 马长远, 等. 近接既有隧道盾构开挖面三维稳定性分析[J]. 岩土工程学报, 2023, 45(7): 1374-1383. (Liu Yingnan, Lei Huayang, Ma Changyuan, et al. Three-dimensional stability analysis of shield excavation face in near-existing tunnels[J]. Journal of Geotechnical Engineering, 2023, 45(7): 1374-1383. (in Chinese))
[8] 邓旭, 郑虹, 宋昭煌, 等. 邻近新建地铁车站的深基坑工程的变形分析[J]. 地下空间与工程学报, 2018, 14(增1): 270-277. (Deng Xu, Zheng Hong, Song Zhaohuang, et al. Deformation analysis of deep foundation pit works adjacent to a new subway station[J]. Journal of Underground Space and Engineering, 2018, 14(Supp.1): 270-277. (in Chinese))
[9] Liang R, Xia T, Hong Y, et al. Effects of above-crossing tunnelling on the existing shield tunnels[J]. Tunnelling and Underground Space Technology, 2016, 58: 159-176.
[10] Liu B, Yu Z, Han Y, et al. Analytical solution for the response of an existing tunnel induced by above-crossing shield tunneling[J]. Computers and Geotechnics, 2020, 124: 103624.
[11] Zhang D M, Xie X C, Li Z L, et al. Simplified analysis method for predicting the influence of deep excavation on existing tunnels[J]. Computers and Geotechnics, 2020, 121: 103477.
[12] Meng F Y, Chen R P, Xie S W, et al. Excavation-induced arching effect below base level and responses of long-collinear underlying existing tunnel[J]. Tunnelling and Underground Space Technology, 2022, 123: 104417.
[13] 金雪峰. 某紧临地铁车站土岩基坑设计与变形规律研究[J]. 地下空间与工程学报, 2021, 17(3): 815-824, 871. (Jin Xuefeng. Research on the design and deformation pattern of soil and rock foundation pit in a subway station immediately adjacent to the subway[J]. Journal of Underground Space and Engineering, 2021, 17(3): 815-824, 871. (in Chinese))
[14] 魏宁, 姚爱军, 李鹏, 等. 超近距离基坑施工对交叠地铁的影响及响应[J]. 地下空间与工程学报, 2018, 14(4): 1056-1063. (Wei Ning, Yao Aijun, Li Peng, et al. Impact and response of ultra-close pit construction on overlapping subways[J]. Journal of Underground Space and Engineering, 2018, 14(4): 1056-1063. (in Chinese))
[15] 张宏伟, 李洋. 深圳地铁11号线土压平衡盾构近距离上跨既有1号线影响分析[J]. 铁道科学与工程学报, 2017, 14(3): 560-567. (Zhang Hongwei, Li Yang. Analysis of the impact of soil-pressure balanced shield close to crossing the existing Line 1 on Shenzhen Metro Line 11[J]. Journal of Railway Science and Engineering, 2017, 14(3): 560-567. (in Chinese))
[16] Lai H, Zheng H, Chen R, et al. Settlement behaviors of existing tunnel caused by obliquely under-crossing shield tunneling in close proximity with small intersection angle[J]. Tunnelling and Underground Space Technology, 2020, 97: 103258.
[17] 安永林, 李佳豪, 周进, 等. 上下立交隧道施工优化与动态近接分区[J]. 铁道科学与工程学报, 2022, 19(2): 470-479. (An Yonglin, Li Jiahao, Zhou Jin, et al. Construction optimization and dynamic proximity zoning of up-and-down overpass tunnels[J]. Journal of Railway Science and Engineering, 2022, 19(2): 470-479. (in Chinese))
[18] 沈良帅, 贺少辉. 复杂环境条件上跨下穿同一既有地铁隧道的变形控制分析及施工方案优化[J]. 岩石力学与工程学报, 2008(增1): 2893-2900. (Shen Liangshuai, He Shaohui. Deformation control analysis and construction scheme optimization of an existing subway tunnel under complex environmental conditions[J]. Journal of Rock Mechanics and Engineering, 2008(Supp.1): 2893-2900. (in Chinese))
[19] Wang P, Wu J, Song D, et al. A general framework for the impact of shield tunnel construction on existing tunnel in soil[J]. Sustainability, 2023, 15(12): 9226.
[20] Zhang Y, Tao L, Liu J, et al. Construction techniques and mechanical behavior of newly-built large-span tunnel ultra-short distance up-crossing the existing shield tunnel with oblique angle[J]. Tunnelling and Underground Space Technology, 2023, 138: 105162.
[21] 王威. 大断面隧道小净距上跨既有隧道施工方案优化[J]. 铁道建筑, 2023, 63(9): 85-90. (Wang Wei. Optimization of construction scheme for large section tunnel with small clear distance across existing tunnel[J]. Railway Construction, 2023, 63(9): 85-90. (in Chinese))
[22] 马凯伦, 董明礼, 曹义, 等. 两侧双基坑开挖对密贴地铁车站的影响研究[J]. 地下空间与工程学报, 2022, 18(增2): 1043-1048. (Ma Kailun, Dong Mingli, Cao Yi, et al. Study on the effect of double pit excavation on both sides on close-packed subway station[J]. Journal of Underground Space and Engineering, 2022, 18(Supp.2): 1043-1048. (in Chinese))
[23] 邢慧堂, 徐前卫, 刘浩, 等. 盾构近距离上跨既有隧道施工影响及控制研究[J]. 铁道工程学报, 2021, 38(9): 61-67. (Xing Huitang, Xu Qianwei, Liu Hao, et al. Study on the impact and control of shield tunnel construction in close proximity to and across existing tunnels[J]. Journal of Railway Engineering, 2021, 38(9): 61-67. (in Chinese))
[24] Yin M, Jiang H, Jiang Y, et al. Effect of the excavation clearance of an under-crossing shield tunnel on existing shield tunnels[J]. Tunnelling and Underground Space Technology, 2018, 78: 245-258.
Outlines

/