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Abstract Recently，underwater tunnels have progressed vigorously in China. Therefore it is necessary to research this type of tunnel using the analogous material test. The test bench composed of high-strength PVC board and structural steel was manufactured. Optical fiber monitoring system and collection device of water seepage were exploited. The new type of solid-fluid coupling analogous material was improved. Then the fluid-solid coupling model test was performed for the Kiaochow Bay Subsea Tunnel. Water inflow and multiple information like the displacement，stress and seepage pressure of key points were recorded in the test process. In order to verify each other，numerical simulation which was similar to the physical test was made using fast Lagrangian analysis of continua in 3 dimensions(FLAC3D). The test results are credible because that the spatial distributions of multiple information got from the representative working condition accord with the general rule. Compared with the numerical simulation，physical test can take influence factors such as the excavation disturbances，water level fluctuations and wall-rock weakness due to seawater immersion into account；so that the results obtained from physical test approach the actual engineering conditions more.
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Received: 18 February 2011
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2011, Vol. 30 
