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| The Application of Steel Caisson Cofferdam with Double-shell and Interspace Tremie Seal in Construction of Bridge Foundation |
| FENG Guang-sheng, LI Yan-zhe |
| The First Engineering Co. Ltd of China Zhongtie Major Bridge Engineering Group, Zhengzhou, Henan 450053, China |
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Abstract Research purposes ： The water-proofing method of full tremie seal is usually used in the construction of bridge pile cap under the condition of uncovered river bed, hard and inclined rock surface, deep water. But when the height between bottom of bridge pile cap and river bed surface is too little to do the full tremie seal, the construction will be difficult , This paper researches the efficient method under the conditions mentioned above.
Research methods：Take 11# pile cap of Yichang Yangtze River Bridge of Yichang-Wanzhou Railway Route for example, using the method of combining theory analysis and engineering construction, this paper studies the construction scheme , technics and the type of water-proofing structure.
Research results：The steel caisson cofferdam with double-shell and interspace tremie seal in construction of bridge foundation is a new and efficient method, which is used in the construction of 11} pile ,cap of Yichang Yangtze River Bridge and gets a very good effect.
Research conclusions：when the height between bottom of bridge pile cap and river bed surface is too little to do the full tremie seal, the circular cofferdam with ring tremie seal is an ideal method of water-proofing. But hen we take in account the problem of how to install and carry on under water the cofferdam, the quadrate steel caisson cofferdam with double-shell and interspace trimie seal will possibly be a good and practical method
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Received: 11 September 2006
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2007, Vol. 24 
