Horizontal grouting on the control effect of lateral deformation and internal force of shield tunnel

被引：0
|
作者：
Feng F. [1 ,2 ]
Wei G. [1 ,3 ,4 ]
Wang Z. [5 ]
Liang L. [1 ]
Zhang Y. [5 ]
机构：
[1] Department of Civil Engineering, Hangzhou City University, Hangzhou
[2] School of Architecture and Engineering, Zhejiang University, Hangzhou
[3] Key Laboratory of Safe Construction and Intelligent Maintenance for Urban Shield Tunnels of Zhejiang Province, Hangzhou
[4] Zhejiang Engineering Research Center of Intelligent Urban Infrastructure, Hangzhou
[5] School of Civil Engineering, Zhejiang University of Technology, Hangzhou
来源：
Journal of Railway Science and Engineering | 2023年 / 20卷 / 08期
关键词：
changes in internal forces; horizontal grouting; lateral convergence correction; numerical simulation; shield tunnels;
D O I：
10.19713/j.cnki.43-1423/u.T20221762
中图分类号：
学科分类号：
摘要：
In order to explore the correction control effect and force deformation law of horizontal grouting on existing tunnels. A calculation model of grouting action on the existing tunnel was established, and the additional stress around the existing tunnel caused by grouting was calculated by using the non-uniform expansion model. Moreover, the confining pressure change of the existing tunnel according to the theory of tunnel confinement redistribution was derived. By taking the excavation project of the foundation pit combined with the grouting engineering as an example, the confining pressure changes of the existing tunnel in each stage were calculated. According to the three-ring segment model established by the numerical software, the influence of grouting on the lateral convergence, concrete stress, and bolt stress of the existing tunnel was obtained. Finally, we analyzed the parameter analysis of the grouting amount, grouting distance, and grouting range. The results show that the horizontal grouting effect causes the weight distribution of the existing tunnel surrounding pressure, and the additional confining pressure on the tunnel mainly appears as a “horizontal ellipse” distribution. In this case, the recovery rate of confining pressure on both sides of the tunnel waist reaches 40%, and the convergence and internal force recovery rate of the tunnel reach 50%. With the continuous increase of grouting, the lateral convergence and internal forces increase linearly. Furthermore, with the decrease of grouting distance, lateral convergence and internal forces show an exponential linear increase. The change in the grouting amount and grouting distance can restore the deformation and internal force of the tunnel to a normal state. It can be considered to change the grouting distance first to save resources. The sensitivity of the grouting effect to grouting depth is far less than that of the grouting amount and grouting distance. There is no significant difference in the grouting effect when the change is small. The parameter setting of grouting engineering can be determined by analyzing the recovery rate of the tunnel, and the research results can provide a reference for grouting rectification adjacent to existing tunnel projects. © 2023, Central South University Press. All rights reserved.
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页码：2987 / 2999
页数：12
相关论文
共 22 条
  • [1] WANG Lifeng, PANG Jin, XU Yunfu, Et al., Influence of foundation pit excavation on adjacent metro tunnels[J], Rock and Soil Mechanics, 37, 7, (2016)
  • [2] CHANG C T, SUN C W, DUANN S W, Et al., Response of a Taipei Rapid Transit System (TRTS) tunnel to adjacent excavation[J], Tunnelling and Underground Space Technology, 16, 3, (2001)
  • [3] SHARMA J S, HEFNY A M, ZHAO J, Et al., Effect of large excavation on deformation of adjacent MRT tunnels [J], Tunnelling and Underground Space Technology, 16, 2, (2001)
  • [4] HUANG Biao, Mingguang LI, HOU Yongmao, Et al., Effect of auto-compensating steel struts on stress and deformation behaviors of supporting structures[J], Rock and Soil Mechanics, 39, (2018)
  • [5] CHEN Jinming, DI Honggui, ZHOU Shunhua, Et al., Axial force compensation for urban rail transit station servo steel support and control effect of foundation pit excavation deformation[J], Urban Mass Transit, 23, 10, (2020)
  • [6] ZHENG Gang, PAN Jun, CHENG Xuesong, Et al., Passive control and active grouting control of horizontal deformation of tunnels induced neighboring excavation [J], Chinese Journal of Geotechnical Engineering, 41, 7, (2019)
  • [7] ZHANG Dongmei, ZOU Weibiao, YAN Jingya, Effective control of large transverse deformation of shield tunnels using grouting in soft deposits[J], Chinese Journal of Geotechnical Engineering, 36, 12, (2014)
  • [8] BAI Rubing, ZHENG Gang, DIAO Yu, Et al., Experimental study and numerical analysis of tunnel deformation control by compensation grouting[J], China Harbour Engineering, 38, 3, (2018)
  • [9] ZHU Min, GONG Xiaonan, GAO Xiang, Et al., Model tests of correction of displaced shield tunnel using grouting technique[J], Journal of Railway Science and Engineering, 17, 3, (2020)
  • [10] GAO Xiang, Analysis and numerical simulation of the influence of deviation rectification grouting on shield tunnel, (2020)
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