| Issue |
E3S Web Conf.
Volume 276, 2021
2021 5th International Conference on Water Conservancy, Hydropower and Building Engineering (WCHBE 2021)
|
|
|---|---|---|
| Article Number | 01011 | |
| Number of page(s) | 7 | |
| Section | Water Conservancy and Hydropower and Natural Geological Exploration | |
| DOI | https://doi.org/10.1051/e3sconf/202127601011 | |
| Published online | 23 June 2021 | |
Study on mechanical response and crack development law of tunnel
CHINA RAILWAY 11TH BUREAU GROUP SECOND ENGINEERING CO., LTD, SHI YAN, 442013, CHINA
E-mail: 1507571665@qq.com
Considering the linear elastic fracture mechanics and complex function theory, considering the non hydrostatic pressure field, the stress solutions of lining and surrounding rock of deep buried circular underground cavern with lining under the action of external internal pressure are studied. The fracture mechanics model of underground cavern supporting structure is established, and the numerical verification is carried out. The analytical solution of circular pressure cavern with lining shows that when the internal pressure is 0, it can degenerate into the existing classical solution. The results of finite element calculation and analytical calculation show that the tensile stress of lining is very large at the vault and arch bottom under the action of strong external supporting force. The calculation shows that the cracks of lining will expand and open under the action of tensile stress, and the lining is in the shape of “flat duck egg”, However, if there is no through rupture, there will be great stress concentration at the top and bottom of the arch, and the tensile stress value is much larger than that calculated by elastic mechanics. Therefore, it is a good method to configure a certain amount of reinforcement to enhance the stiffness and tensile strength of the lining.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.