关键词: 输水隧洞;预应力混凝土衬砌;锚具槽;免拆模板;数值模拟;

Abstract: Anchor groove of prestressed concrete lining is a key part of prestress tensioning and anchoring, which influences the reliability of prestressed concrete lining.In this paper, a new prefabricated assembly anchor groove of permanent formwork is proposed, the finite element numerical analysis is carried out based on the permanent formwork anchor groove used in the Pearl River Delta water resources allocation project, and the conventional anchor groove is used to be compared with the new type.Simulation results show that the new anchor groove prevents the lining concrete from cracking at the corner of the anchor groove and improves the efficiency of backfill concrete and lining.Compared with the conventional anchor groove, the permanent formwork anchor groove reduces the size of the anchor groove and improves the entirety of the lining concrete.The new anchor groove has many advantages such as high construction efficiency, low project cost, and good construction environment.

Key words: water conveyance tunnel; prestressed concrete lining; anchor groove; permanent formwork; numerical simulation;