1. Development and assessment of a water pressure reduction system for lining invert of underwater tunnels
- Author
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Yong Zhao, Pengfei Li, Chunhui Feng, Haocheng Xiong, Zhen Li, Hongchuan Liu, Beijing University of Technology, Sichuan Tibet Railway co. LTD, Géomatériaux et Modèles Géotechniques (IFSTTAR/GERS/GMG), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Nantes Angers Le Mans (UNAM), University of Science and Technology Beijing [Beijing] (USTB), and Cadic, Ifsttar
- Subjects
DRAINAGE ,0211 other engineering and technologies ,Ocean Engineering ,02 engineering and technology ,Oceanography ,01 natural sciences ,Reduction (complexity) ,PORE WATER PRESSURE ,SOUS L&apos ,Drainage ,Underwater ,021101 geological & geomatics engineering ,0105 earth and related environmental sciences ,Petroleum engineering ,UNDERWATER ,010505 oceanography ,Water pressure ,Geotechnical Engineering and Engineering Geology ,6. Clean water ,TUNNEL ,[SPI.GCIV]Engineering Sciences [physics]/Civil Engineering ,EAU ,TUNNELS DRAINAGE ,MILIEU MARIN ,PRESSION INTERSTITIELLE ,[SPI.GCIV] Engineering Sciences [physics]/Civil Engineering ,Environmental science - Abstract
To efficiently reduce the secondary lining external water pressure on underwater tunnels, the feasibility of a novel bottom-up drainage and water pressure reduction system for reducing has been validated by conducting laboratory evaluations. Critical factors of underwater tunnels, including the surrounding environment, lining, bottom drainage system, and other supplementary components have been represented by such system to investigate the drainage mechanism and efficiency of the designed system. The drainage system has been further optimized by analyzing the measured water pressure and flow rate. Experimental results indicate that the designed draining system is feasible for reducing the secondary lining external water pressure in the bottom of tunnels and the water pressure has been reduced significantly with high efficiency. The capacity of the proposed system to control the rapid water inflow in tunnel construction regions can be guaranteed. The factors affecting the performance of the system such as the diameter of the drainage pipe and the inlet water pressure are also discussed.
- Published
- 2019
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