Affiliation:
1. Gongqing Institute of Science and Technology, Gongqingchengshi 332020, China
2. School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, China
Abstract
During the construction of a diversion tunnel, geological problems often include faults, fragile strata, hard rock formations, karst landforms, etc., which may have adverse effects on the excavation and construction of the diversion tunnel. Based on the analysis of the engineering overview, this study designed a new construction technology for the excavation of water diversion tunnels in hard rock layers and high-karst areas. Based on tunnel seismic prediction (TSP) technology to achieve advanced geological prediction, combined with actual geological conditions, construction difficulties are analyzed. Then, detection technology is used to collect two-way travel time, amplitude, and waveform data. By processing and analyzing the detection image, the spatial orientation and length of the main tunnel during the construction of the diversion tunnel are calculated. After completing the construction ventilation and wind, water, and electricity layout, the excavation construction procedure is designed. In the specific excavation design, the tunnel curtain excavation technology, tunnel body excavation and support technology, excavation grouting technology, important unfavorable geological tunnel section excavation technology, upper/lower flat section excavation technology, upper/lower curved section excavation technology, and vertical shaft section excavation technology were elaborated. Finally, a plan was made for the reuse process of slag material and a construction quality control system was established. During the testing process, it was found that the antidamage coefficient of the side wall was above 0.9 after using the technology described in this article. Therefore, it indicates that the excavation construction technology designed in this article can ensure the support capacity of the side wall of the diversion tunnel, which is suitable for the excavation of the main tunnel during the construction of the diversion tunnel.
Subject
Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science
Reference20 articles.
1. Research and application of key construction technologies for TBM-driven tunnels under extreme complex geological conditions;Feng;Mod. Tunn. Technol.,2022
2. Study on key intelligent construction technologies of super-long and deepburied hydraulic tunnels under complex geological conditions;Hao;Mod. Tunn. Technol.,2021
3. Del Río, D.A., Caballero, J.A., Muñoz, J.T., Parra-Rodriguez, N.C., Nieto-Londoño, C., Vásquez, R.E., and Escudero-Atehortua, A. (2023). Design of a Self-Supporting Liner for the Renovation of a Headrace Tunnel at Chivor Hydropower Project. Water, 15.
4. Witznau power station, grouting tests for upgrading the headrace tunnel;Schwalt;Geomech. Tunn.,2022
5. Construction scheme optimization of diversion tunnel considering influence of risk factors;Yu;J. Hohai Univ. (Nat. Sci.),2021
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