Abstract
ABSTRACT In recent years, because of the development of the technology in shield tunneling, deformation due to shield tunneling is mainly contributed by these occurring while a shield is passing and by subsequent deformations. Though a few methods have been proposed to predict the deformation in numerical, statistic and empirical ways, it is hard to say these methods can be used with confidence. Based on the accumulated measurement data of shield tunneling, it is known that the ground deformation when a shield is passing is mainly caused by the stress release at the cutting face and the tail. It is also known that the subsequent deformation is dependent on the maximum deformation that occurred during the shield passing and the liquidity index IL which is related to the sensitivity. The total deformation due to shield tunneling is divided into the two parts mentioned above. These are evaluated with the proposed prediction method in practical ways respectively based on accumulated measurement data.
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