Analysis on the Adjacent Anchor Effect of Prestressed Tunnel Liner with Circular Anchored Tendons

In this paper, based on theory of elastic mechanics, the mechanical property of prestressed concrete lining structure was studied;theoretical formulas of normal displacement and inner force on the middle surface were deduced and the area of adjacent anchor effect was determined. Combing observed data in practical project, the theoretical result in the area of adjacent anchor effect and measured result of circumferential stress in prestressed concrete lining structure was compared. Results reveal that the theoretical results given by the formulas of adjacent anchor effect are in very agreement with the field test, the theoretical results being reasonable. The calculating method of the adjacent anchor effect in the prestressed tunnel liner with circular anchored tendons presented in the paper can be used in practical project.