Research and application of balance mechanism of excavation surface of slurry shield tunnels considering cutterhead thrust

被引：0
|
作者：
Duan L. [1 ]
Wang J. [1 ]
Hou L. [2 ]
Lu Y. [1 ]
Min F. [3 ]
Mao Z. [1 ]
机构：
[1] College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing
[2] Water Conservancy and Irrigation District Engineering Construction Administration of Xixiayuan Water Conservancy Project, Zhengzhou
[3] College of Civil and Transportation Engineering, Hohai University, Nanjing
来源：
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2024年 / 46卷 / 07期
关键词：
cutterhead thrust; excavation surface; mud pressure; slurry shield; stability; support; total thrust;
D O I：
10.11779/CJGE20230324
中图分类号：
学科分类号：
摘要：
In the existing balance mechanism of the excavation surface of slurry shield tunnels, the support of the excavation surface is mostly considered to be provided by mud pressure, and the role of cutterhead thrust in the support is rarely mentioned. In response to the specific problem of excavation surface support in the Chuanqin slurry shield tunnel project, based on the analysis of the main control parameters of excavation surface support, the balance mechanism of the excavation surface of the slurry shield tunnel considering the cutterhead thrust is revealed, and a specific expression for the cutterhead thrust is proposed. Using the revealed equilibrium mechanism and the proposed method for estimating the external frictional resistance of the shield shell, the calculation of excavation support force and the stability analysis are conducted for the three key crossing sections of the project. The research shows that in the excavation of the three key crossing sections, the cutterhead thrust accounts for 21%, 24% and 11% of the excavation face support force, respectively. Considering both the mud pressure and the cutterhead thrust, the proportion of the combined axial water and soil forces in the presence range in front of the excavation face increases from 0, 0 and 78% to 78%, 32% and 88%, respectively, compared to only considering the mud pressure. It is indicated that the cutterhead thrust plays an important role in the excavation face support. © 2024 Chinese Society of Civil Engineering. All rights reserved.
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页码：1556 / 1562
页数：6
相关论文
共 10 条
  • [1] ZHANG Fengxiang, Shield Tunnelling Method, (2004)
  • [2] WEI Liangwen, ZHANG Qinghe, DENG Zhongyi, Research on mechanism and application of face stability in large slurry shield tunneling, Chinese Journal of Underground Space and Engineering, 3, 1, pp. 87-91, (2007)
  • [3] YUAN Dajun, YIN Fan, WANG Huawei, Et al., Study of soil disturbance caused by super-large diameter slurry shield tunnelling, Chinese Journal of Rock Mechanics and Engineering, 28, 10, pp. 2074-2080, (2009)
  • [4] DENG Zongwei, WU Zhenzhi, CAO Hao, Et al., Surface deformation of slurry shield tunneling using fluid-solid coupling theory, Journal of Central South University (Science and Technology), 44, 2, pp. 785-791, (2013)
  • [5] MIN Fanlu, ZHU Wei, WEI Daiwei, Et al., Change of pore water pressure in soil as filter cakes formed on excavation face in slurry shield, Chinese Journal of Geotechnical Engineering, 35, 4, pp. 722-727, (2013)
  • [6] LIU Xinrong, LIU Dongshuang, CHEN Qiang, Et al., Research on the sensitivity of factors affecting the stability of slurry shield excavation face and control parameter optimization, Chinese Journal of Underground Space and Engineering, 18, 6, pp. 1954-1961, (2022)
  • [7] LIU Xueyan, WANG Fuming, YUAN Dajun, Et al., Range of support pressures for slurry shield and analysis of its influence factors, Chinese Journal of Geotechnical Engineering, 41, 5, pp. 908-917, (2019)
  • [8] YUAN Dajun, SHEN Xiang, LIU Xueyan, Et al., Research on excavation face stability of slurry shield tunneling, China Journal of Highway and Transport, 30, 8, pp. 24-37, (2017)
  • [9] NIU Yongqian, YANG Lilin, SHEN Lu, Sedimentation analysis of shield tunnel construction on water-rich sandy stratum based on peck formula, Yellow River, 45, 4, pp. 130-135, (2023)
  • [10] SUN Feixiang, SUN Zhenchuan, ZHANG Bing, Et al., Characteristics analysis of main resistance force for ϕ15.80 m slurry balance shield, Chinese Journal of Underground Space and Engineering, 17, S1, pp. 235-240, (2021)
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