This article introduce the centralized pre-binding&integral hoisting steel-bar construction technology on 50m/1430t box girder of the hangzhou bay bridge.

Combined with the pre-fabrication process of the in-situ box girder of south junction J1 Bid bridge of Runyang Bridge,the article introduces in detail the construction technology of pre-stressed concrete pre-fabricated box girder by post-tensioning method and the relative points for attention in the course of construction.

This result has a certain meaning to calculate the temperature stress and deflection of prestressed concrete box beam.

Some problems existing in the construction of prestressed concrete box beam are in- troduced, and some views and measures are put forward in the paper.

Now cantilever construction of prestressed concrete continuous box girder as the chief construct methord in engineering has gone intio the rang of mature.

Taking Guangzhou Station construction along Wuhan-Guangzhou Passenger Line,this paper introduces and analyzes new standards and techniques of simple prestressed concrete beam construction,providing a general knowledge for the readers with construction control in this project.

The phenomenon of web and anchorage zone cracks of continuous PC box girder is fairly common.

A long term field monitoring was performed over the creepage of PC box girder of Jinbin Light Rail.

However, China highway and bridge criterions don\'t make detailed regulations about temperature gradient of PC box girder bridge.