Open AccessOn-site Monitoring and Comparative Analysis about Surrounding Rock Pressure Variation with Time in Unsymmetrial Loading Tunnel
Author(s) -
Jiangchun Hu,
Fa-yong Sun,
Yuan Li,
Li Cui,
Meng-jie Ji
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/295/4/042050
Subject(s) - arch , geology , geotechnical engineering , pressure measurement , mining engineering , structural engineering , engineering , mechanical engineering
Bias Tunnes are common seen and it has complicated variation on their surrounding rock pressure. It is crucial for the security and stability of a tunnel to determine the variation law of surrounding rock pressure and on-site monitoring technology. This essay compares the experimental data to the theoretically calculated data of a certain tunnel according to the data from on-site monitoring and theoretical analysis. The result indicates that the real data of surrounding rock pressure of three chosen cross sections is close to the calculated data from grade V surrounding rock. To be specific, the vault and the arch waist are in good agreement. The pressure on the tunnel is obviously unsymmetrial. The data of surrounding rock pressure of arch waist and flank wall on the left side is larger than that on the right side.Also, there is a significant difference between the measured data and calculated data of pressure of horizontal adjoining rock. The horizontal stress of surrounding rock on the bias tunnel is over-released. The measured pressure data on flank wall is much larger than its calculated data.In conclusion, The timbering system should be reinforced in the early stage of construction and the rigidity of timbering system should be chosen carefully. The result of this research can contribute to the tunnel construction design and construction safety in the future.