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| Application of Fiberglass Reinforcement in Exterior-protected Structure of Shield End Shaft |
| LIN Gang，LUO Shi—pei |
| China Railway Eryuan Engineering Group Co．Ltd，Chengdu，Sichuan 610031，China |
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Abstract Research purposes: The application of fiberglass reinforcement in exterior—-protected structure of shield end shaft instead of steel reinforcement not only can reduce the occurrence of accident that the shield enters into and comes out from the shield end shaft and improve the efficiency of construction，but also reduce the cost for consolidation of stratum at the end shaft．For the reasons mentioned above，in this paper the study is done on the application of fiberglass reinforcement in the exterior—protected structure of shield end shaft through the theoretical analysis，indoor test and in situ test．
Research conclusions: The basic mechanical parameters of fiberglass reinforcement and the basic structure features of fiberglass reinforced concrete are obtained through the indoor test．The basic design formula of fiberglass reinforced concrete has been deduced with referring to the design method for reinforced concrete and assumption of the bearing capacity of cross—section．The measured data of the first hand about application of fiberglass reinforcement exterior— protected pile in the construction of foundation pit are gained through the in situ test．All of these provide the theoretical，technical and in situ basis for application of fiberglass reinforcement in exterior—protected structure of shield end shaft．
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Received: 03 June 2009
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2009, Vol. 26 
