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| Influence of Slope on Slurry Diffusion in Grouting Treatment of Immersed Tunnel |
| LI Ke, DU Jia-Lun, HUANG Xing-Chun |
| (Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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Abstract Slopes caused by unevenness of cushion or tunnel design will affect slurry diffusion, when adopting grouting method in foundation treatment of immersed tunnel. Model test was conducted to study slurry diffusion of singlehole and dualhole grouting with different slopes. It was indicated that diffusion velocity along downhill direction would be larger than that along uphill direction apparently, which shows that the flow of slurry is influenced by the gravity obviously, trending to the lower position. With the larger slope, the difference between diffusion velocity along uphill and downhill direction would be greater. Based on the test result, it ought to inject at the lowest grouting hole firstly, and along the uphill direction in turn, to avoid voids.
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Received: 19 November 2010
Published: 30 May 2011
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