Abstract
Some mountain tunnels suffered from ground heaving require some countermeasures in service, but these designs often depend on empirical methods. Therefore reasonable countermeasures against heaving is significant challenge. In this study, at first, we carried out anecdotal survey and presumed the mechanism of heaving. Second, we carried out the model experiment and its numerical analysis with simulating the mechanism we supposed. As the result, it is confirmed that invert is very effective for the heaving caused by shear failure of roadbed. Moreover, we explained the mechanism of action of downward rock bolts, and make a study about the reasonable specifications of design such as the number of rock bolts, their position, length, angle, and so on.
