Shield tunneling method has been widely applied to the construction of underground structures in urban area and a demand for long distance tunneling under high underground water pressure is growing recently.
To deal with the demand, a tail-end-sealing system of shield tunneling machine is treated in this report among other technology developments. We have designed a high durability new tail-end-sealing system which is made by filling up ordinary wire brush with poly urethane form, and a series of fundamental efficiency tests' has been carried out.
As a result, it was clarified that the new tail-end-sealing system has higher sealing performance and higher durability than the ordinary wire brush type tail seal.
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