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Analysis of Tunnel Water Inrush Considering the Influence of Surrounding Rock Permeability Coefficient by Excavation Disturbance and Ground Stress
- Source :
- Applied Sciences, Vol 11, Iss 3645, p 3645 (2021), Applied Sciences, Volume 11, Issue 8
- Publication Year :
- 2021
- Publisher :
- MDPI AG, 2021.
-
Abstract
- Affected by the coupling of excavation disturbance and ground stress, the heterogeneity of surrounding rock is very common. Presently, treating the permeability coefficient as a fixed value will reduce the prediction accuracy of the water inflow and the external water pressure of the structure, leading to distortion of the prediction results. Aiming at this problem, this paper calculates and analyzes tunnel water inflow when considering the heterogeneity of permeability coefficient of surrounding rock using a theoretical analysis method, and compares with field data, and verifies the rationality of the formula. The research shows that, when the influence of excavation disturbance and ground stress on the permeability coefficient of surrounding rock is ignored, the calculated value of the external water force of the tunnel structure is too small, and the durability and stability of the tunnel are reduced, which is detrimental to the safety of the structure. Considering the heterogeneity of surrounding rock, the calculation error of water inflow can be reduced from 27.3% to 13.2%, which improves the accuracy of water inflow prediction to a certain extent.
- Subjects :
- ground stress
Technology
Disturbance (geology)
QH301-705.5
QC1-999
0211 other engineering and technologies
02 engineering and technology
Inflow
010502 geochemistry & geophysics
01 natural sciences
Stress (mechanics)
Distortion
Coupling (piping)
General Materials Science
Geotechnical engineering
excavation disturbance
Biology (General)
Instrumentation
QD1-999
021101 geological & geomatics engineering
0105 earth and related environmental sciences
Fluid Flow and Transfer Processes
water inflow prediction
Process Chemistry and Technology
permeability coefficient
Physics
General Engineering
Excavation
Engineering (General). Civil engineering (General)
Durability
Inrush current
Computer Science Applications
Chemistry
TA1-2040
Geology
Subjects
Details
- Language :
- English
- ISSN :
- 20763417
- Volume :
- 11
- Issue :
- 3645
- Database :
- OpenAIRE
- Journal :
- Applied Sciences
- Accession number :
- edsair.doi.dedup.....2f4fdc0a8f0e03fbc673354f27f4281a