Characterization of uncertainty in shield tunneling excavated in soft soils based on gap parameter

YANG Wenyu; ZHENG Junjie; ZHANG Wengang; ZHANG Rongjun; LIANG Zhengbin; TAO Yingjian

doi:10.11779/CJGE2024S20011

Volume 46 Issue S2

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Chinese Journal of Geotechnical Engineering > 2024 > 46(S2): 107-113. > DOI: 10.11779/CJGE2024S20011

YANG Wenyu, ZHENG Junjie, ZHANG Wengang, ZHANG Rongjun, LIANG Zhengbin, TAO Yingjian. Characterization of uncertainty in shield tunneling excavated in soft soils based on gap parameter[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(S2): 107-113. DOI: 10.11779/CJGE2024S20011

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Characterization of uncertainty in shield tunneling excavated in soft soils based on gap parameter

1.
College of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
2.
School of Civil Engineering, Wuhan University, Wuhan 430072, China
3.
School of Civil Engineering, Chongqing University, Chongqing 400045, China
4.
China Railway Eighth Engineering Group First Engineering Co., Ltd., Chongqing 400053, China

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Received Date: June 20, 2024

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Abstract

Abstract

To prevent the risk of displacement induced by shield tunneling, it is necessary to conduct probabilistic analysis. Gap parameter explains the source of ground loss in detail by dividing the ground loss into three parts. Based on it, the uncertainty of many parameters in the shield tunneling process is characterized, which provides an important prerequisite for probability analysis. The main idea is to obtain the statistics of three components of the gap parameter: three-dimensional equivalent gap u^*_3D, gap due to workmanship ω and physical gap g. The three-dimensional equivalent gap u^*_3D and the gap due to workmanship ω are relatively complicated, and the statistics of the relevant geological and tunneling parameters are given according to the literatures. The physical gap g is directly related to the grouting effects. The filling rate of grouting is determined by the geological radar data, and the statistics of the physical gap are given.
- soft soil,
- shield tunnel,
- gap parameter,
- construction deformation,
- uncertainty

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References (29)

References

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