The application relates to a kind of based on
frustum-symmetry combination socket type fast assembling tunnel segment, the segment includes annular surface connecting module consisting of
gable and concave
gable and longitudinal connecting module consisting of male joint and female joint, the annular surface of
adjacent segment is connected by annular surface connecting module, the longitudinal surface of
adjacent segment is connected by longitudinal connecting module, the
gable, concave gable, male joint and female joint are all
frustum, the side of the
frustum is continuous surface.
Gable, concave gable, male joint and female joint are all frustum, the side of the frustum is continuous surface, frustum can effectively reduce the
bending moment, the side of the frustum is inclined surface and continuous, realize self-sealing by the wedge effect of inclined surface;At the same time, radial expansion force is generated, self-locking is realized, loosening caused by vibration is prevented, load is evenly distributed, there is no obvious
stress concentration, both can bear large torque and
impact load, and can also ensure the stability of long-term operation.