Study on Dynamic Friction Characteristic around Skinplate by Ring Shear Test

Abstract

In shield tunnelling, the frictional resistance of ground against the shield skinplate is a major factor of jack thrust. However, there are few laboratory test results on the dynamic friction characteristics concerned with shield. Therefore, this research investigates the above dynamic friction characteristics by the ring shear test, where the surface roughness, the soil type, the inclusion, the shear speed and the confining pressure are taken as test parameters. Furthermore, the influence of those test parameters on the dynamic friction characteristics are discussed.