CONSTRUCTION OF SHEILD TUNNEL USING COTTERS AND QUICK-JOINT SEGMENTS

Abstract

We developed “Cotter and Quick-joint” for shield tunnel segments. Cotter joints connecting circumference segments achieves stable fastening capacity, high rigidits and accuracy while Quick-joints connecting formed rings will be tightened gradually by shield trust jack force and will achieve high stability and water tightness.
In order to verify such advatage, the Cotter and Quick-joint was applied to an actual power tunnel project and strains on quibk-joints and longitudinal strain on steel segments were monitored for two months. The result was satisfactory amd the detail is described in this report.