Research on Emergency Drainage Technology for Extraordinary Water Inrush Disaster in Da Bashan Highway Tunnel

DOI

10.2991/978-94-6463-514-0_36How to use a DOI?

Keywords

water inrush disaster; adits and inclined shafts; pump station; dewatering

Abstract

The occurrence of sudden water inrush disasters during tunnel construction is characterized by urgency and unpredictability, making the scientific and efficient emergency response capability crucial. Based on the context of the Daba Mountain Tunnel project under construction on the Anlan Expressway, this study utilizes field investigations and theoretical analysis to analyze the causes of tunnel water inrush disasters. It proposes schemes for dewatering through inclined shafts and adits, determines key parameters of the schemes, discusses pump operational performance, and applies these schemes in engineering practice. The results indicate that water is stored in limestone formations, geological structures control water, water inrush occurs in fault zones, and the combined effects of dynamic and static loads lead to water inrush disasters, resulting in a tunnel water volume of approximately 170,000 m3. The refuge chamber can serve as a location for water storage, with 5 DN200 pipes selected for inlet pipes and 3 DN300 pipes for outlet pipes. The static and mobile pump stations have respective lift capacities exceeding 160m and 80m. The fixed pump station comprises two 630kW + one 160kW horizontal centrifugal pumps, while the mobile pump station consists of five 55kW submersible pumps, meeting the performance and economic requirements of parallel operation for the fixed pump station. Consequently, a phased emergency dewatering technology, comprising “mobile pump station + fixed pump station + water storage chamber,” is developed and applied in practical engineering, effectively addressing the emergency response to severe water inrush disasters in tunnels.

Copyright

© 2024 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.

Download article (PDF)

TY  - CONF
AU  - Wanliang Tian
AU  - Jinlei Li
AU  - Qiang Chen
AU  - Chunhui Chang
PY  - 2024
DA  - 2024/09/28
TI  - Research on Emergency Drainage Technology for Extraordinary Water Inrush Disaster in Da Bashan Highway Tunnel
BT  - Proceedings of the 2024 7th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA 2024)
PB  - Atlantis Press
SP  - 342
EP  - 357
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-514-0_36
DO  - 10.2991/978-94-6463-514-0_36
ID  - Tian2024
ER  -