Shield small-radius turning device for preventing duct pieces from being damaged

The utility model provides a shield small-radius turning device for preventing a duct piece from being damaged, and relates to the technical field of shield tunneling. The device comprises a segment steel base plate, a shield steel base plate, a hinged hydraulic oil cylinder, a distance measuring sensor, a control terminal and a buffer layer. The multiple hinged hydraulic oil cylinders are arranged between the segment steel base plate and the shield steel base plate and connected with the segment steel base plate and the shield steel base plate. The distance measuring sensor is arranged between the segment steel base plate and the shield steel base plate and is connected with the segment steel base plate or the shield steel base plate; the distance measuring sensor and the hinged hydraulic oil cylinder are both connected with the control terminal. The buffer layer is arranged on the side, away from the hinged hydraulic oil cylinder, of the segment steel base plate. The device can prevent the duct piece from b