普速铁路后张法预应力混凝土T梁常见裂纹分析及防治浅析

Analysis and prevention of common cracks in post-tensioned prestressed concrete T-girders of general speed railway

近年以来,我国铁路发展进入高潮,新建铁路线路中桥梁占比越来越高。在设计200Km/h以下的普速铁路中,后张法预应力混凝土T梁(以下简称T梁)得到了大量的应用。本文分析T梁生产预制过程中不同结构部位常见裂纹类型和产生机理,并对实际施工的的防治措施进行探讨。

In recent years,China＇s railway development climax,the new railway line bridge increasingly high proportion.In the design of 200Km/h based general speed railway,post-tensioned prestressed concrete T-girders（hereinafter referred to as T-girders） has been widely used.In this paper,the common crack types and mechanism of different structural parts in T-girders production are analyzed,and the preventive measures are discussed.