关键词: 盾构隧道, 环缝, 斜螺栓, 解析解, 足尺试验

Abstract: Field data demonstrates that circumferential joint is the weakness of shield tunnel. Dislocation on the circumferential joint is the main reason why differential settlement arises along longitudinal direction. So it is necessary to identify the failure process of circumferential joint. A circumferential joint connected by diagonal bolts is taken as an example. A series of analytical solution to predict the failure process of the joint is presented, and a full-scale test is conducted to verify the analytical solution. The result of the study shows that the result from the test agrees with the analytical solution. The failure process of the circumferential joint can be divided into three stages. That two plastic hinges appears on the diagonal bolt is the reason why the circumferential joint break down.

Key words:  shield tunnel, circumferential joint, diagonal bolt, analytical solution, full-scale test