Analysis of Surrounding Rock Creep Effect on the Long-Term Stability of Tunnel Secondary Lining | Zendy

Xiaoqian Zhang | Zendy; Chengmin Wei | Zendy; Heng Zhang | Zendy

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Analysis of Surrounding Rock Creep Effect on the Long-Term Stability of Tunnel Secondary Lining

Author(s) -

Xiaoqian Zhang,

Chengmin Wei,

Heng Zhang

Publication year - 2021

Publication title -

shock and vibration

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.418

H-Index - 45

eISSN - 1875-9203

pISSN - 1070-9622

DOI - 10.1155/2021/4614265

Subject(s) - creep , geotechnical engineering , arch , inversion (geology) , geology , inverse transform sampling , stress (linguistics) , structural engineering , engineering , materials science , composite material , seismology , surface wave , telecommunications , linguistics , philosophy , tectonics

The secondary lining failure of deep buried soft rock tunnel often occurs, which is obviously related to the time factor. The formation mechanism of this phenomenon is studied in this paper. Therefore, the combination of in situ stress measurement and neural network inversion is used to analyze the distribution characteristics of in situ stress. At the same time, the creep characteristics of surrounding rock are tested in laboratory, and the key parameters are obtained. Combined with the characteristics of surrounding rock, the calculation model is established by using discrete element simulation technology and considering the joints of surrounding rock. According to the above multiple information, the stress characteristics of the secondary lining in different time periods are analyzed creatively. Finally, the method of setting arch and adding anchor bolt in key parts is proposed, and significant effect results are obtained.

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