Vibration tests on crossing-river tunnel under tidal bore
CAI Zhong-xiang1, 2, HUANG Mao-song2, 3, JIAO Qi-zhu4
1. Shanghai Xian Dai Architectural Design(Group)Co., Ltd., Shanghai 200041,China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 3. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 4. China Railway Siyuan Survey And Design Group Co., Ltd., Wuhan 430000, China
Abstract：The crossing-river tunnel plays an important role in the connection of nearby cities. Nevertheless, the tidal bore brings a great challenge to the design and construction of the tunnel for its powerful impulse. The tidal bore brings the river to rise sharply in short time, which will cause vibration to the tunnel. The main frequency is obtained through the frequency analysis of the vibration signals. The results show that the peak vertical acceleration of the tunnel is smaller than the local vibration caused by the construction of vehicles. Hence, the tidal bore is not the dominant factor to the safe operation of the tunnel.
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