Author(s)

Wang Fei ¹, He Chanlong ¹, Liu Qibin ¹, Yao Shenghui ², Zhu Chenyang ², Shen Mingrui ²

Affiliation(s)

¹ China Communications Fourth Engineering Bureau Second Engineering Co., Ltd., Luoyang, Henan, 471000, China
² School of Civil Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China

Corresponding Author

Yao Shenghui

ABSTRACT

During the tunnel boring construction of shield tunnel, the tunnel tubes are floated due to the influence of many factors such as tubes installation process, groundwater level, tubes grouting, and site conditions, which leads to tubes misalignment and breakage. Therefore, in order to ensure the construction quality, it is necessary to study the factors of tube sheet uplift. Relying on a rail transit project example, this paper investigates the uplift factors of tube sheet lining structure after on-site investigation and analysis of engineering quality defects. The results show that the uplift of the pipe sheet is caused by the presence of groundwater, improper setting of the tunneling parameters of the shield machine, and the failure of the grouting slurry to solidify in time. For the existence of groundwater, the grouting holes can be opened and released to reduce the impact of groundwater; the parameters of the shield machine should be adjusted according to the advancing distance, the nature of the ground surrounding rock and the tunnel design line; the grouting slurry should be adjusted according to the engineering geological conditions and the situation around the tunnel. The results of the study can provide some valuable references for the factors and treatment measures of shield tube sheet floating during the shield construction process.

KEYWORDS

Shield tunnel, tube uplift, groundwater, shield parameters, grouting

CITE THIS PAPER

Wang Fei, He Chanlong, Liu Qibin, Yao Shenghui, Zhu Chenyang, Shen Mingrui, Causes and Control Measures of Floating Tube Sheet in Metro Shield Tunnel. Journal of Civil Engineering and Urban Planning (2024) Vol. 6: 43-52. DOI: http://dx.doi.org/10.23977/jceup.2024.060406.

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