Proceedings of the 2023 5th International Conference on Structural Seismic and Civil Engineering Research (ICSSCER 2023)

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Study on the influence of Peripheral Hole Interpolation Angle on Tunnel Overcut and Undercut

Authors
Jun Wang1, *
1China Railway 16th Bureau, Group Road and Bridge Engineering Co, LTD, Beijing, 100018, China
*Corresponding author. Email: 773568379@qq.com
Corresponding Author
Jun Wang
Available Online 7 December 2023.
DOI
10.2991/978-94-6463-312-2_12How to use a DOI?
Keywords
peripheral hole; External interpolation Angle; LS-DYNA; Overcut and undercut; Average overcut value
Abstract

The parameters that control the smooth blasting effect of tunnel driving include peripheral hole spacing, charge structure and external interpolation Angle, among which the peripheral hole external interpolation Angle is an important parameter to ensure the quality of smooth blasting. This paper uses the finite element software LS-DYNA to establish the optical explosion model of the peripheral hole based on a granite tunnel driving project, and simulates the optical explosion effect under five kinds of external interpolation angles. The results show that the influence of external interpolation Angle on over digging is great. With the increase of 1.25°, the average overcut value at the bottom of the hole increases by about 5 cm. The expression of the function relation between the average overcut value of the section and the position of the hole, the position of the section, the Angle of the extrapolation, the uncoupling coefficient and the depth of the hole can be derived. The research results can provide reference for the selection of optical explosion parameters in similar projects.

Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 2023 5th International Conference on Structural Seismic and Civil Engineering Research (ICSSCER 2023)
Series
Atlantis Highlights in Engineering
Publication Date
7 December 2023
ISBN
10.2991/978-94-6463-312-2_12
ISSN
2589-4943
DOI
10.2991/978-94-6463-312-2_12How to use a DOI?
Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Jun Wang
PY  - 2023
DA  - 2023/12/07
TI  - Study on the influence of Peripheral Hole Interpolation Angle on Tunnel Overcut and Undercut
BT  - Proceedings of the 2023 5th International Conference on Structural Seismic and Civil Engineering Research (ICSSCER 2023)
PB  - Atlantis Press
SP  - 107
EP  - 116
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-312-2_12
DO  - 10.2991/978-94-6463-312-2_12
ID  - Wang2023
ER  -