MECHANICAL PROPERTIES OF JOINT IN SHIELD TUNNEL MULTI-HINGE SEGMENT

Abstract

“The multi-hinge segment”, in which the joint structure of the shield tunnel segment is simplified, is improved in economy, in construction and in durability, compared with the joint of the traditional style.
In our last report, it is proved by the analysis that in the seismic behavior the joint with lower rigidity more advantageous than the joint with higher rigidity. The nylon joint, which we intend to use as the ring-joint for the multi-hinge segment, does not need bolting, but can be connected to it by just pushing in with a jack. In this report, the experiments in pushing in, pulling out, and shearing by using the real joint clarified the mechanical properties of joint.
The test specimen with nylon joint behaved well in shear and flexural performance, and showed large ductility. The report also refers to the method of designing the multi-hinge segment.