In this country,the erectable rectangular segment has not been adopted,with its relevant theory of design or calculation falling short of soundness.

Due to the complex geological conditions,high gradient requirements and the rowed piles under which the shield machine bores through,it is of great difficulties to conduct the segment erections.

This paper presents a type of segment erector used in segment lining for the new surface after excavating during shield tunneling.

With the support of National Key Basic Research and Development Scheme, a comprehensive research on segment erector which is used in segment lining for the new surface during shield tunneling is developed.

This paper discusses the working principle of the full shield segment-erection system and analyzes the technical status and existing problems of the segment erector at home and abroad.