Vertical collapse prevention structure of the shield tunnel , shield tunnel of vertical collapse prevention method , and the shield tunnel .

摘要

PROBLEM TO BE SOLVED: To effectively prevent vertical crush in a shield tunnel with easy construction and at a low cost.SOLUTION: A tension member 20 is installed from one of an upper part and a lower part of a cover body 12 to the other in a shield tunnel 10, the tension member is supported at the other, and the tension member is extended in a tunnel axial direction from a support position and supported. The tension member is installed from the support position to one of the upper part and the lower part, the tension member is supported at the one part, and the tension member is extended in the tunnel axial direction from the support position and supported.