钢管格构墩高抛自密实混凝土技术研究

On High Dropping Self-compacting Concrete Technique of Steel Tube Lattice Pier

雅泸高速公路干海子特大桥下部结构钢管格构墩钢管立柱内设计为灌筑C50混凝土,受立柱钢管尺寸和高差限制,管内砼的浇注采取常规施工方法有很多困难,施工质量也难以保证。介绍了干海子特大桥桥钢管立柱采取的高抛自密实微膨胀砼施工技术。

The upright column in steel tube lattice pier substructure of Ganhaizi Bridge in Ya＇ an-Luzhou Highway project uses C50 concrete.There are lots of difficulties in using conventional ways to pour concrete into the tube and the construction quality is hard to ensure because of the restrictions of steel tube size and elevation difference.This paper introduces construction technique of high dropping self-compacting microdilatancy concrete of steel tube column in Ganhaizi Bridge.