超高性能混凝土在新建地面桥梁中的应用探索

Application of Ultra High Performance Concrete in Newly Built Ground Bridges

超高性能混凝土(UHPC)是一种从材料组成、配合比设计、微观结构等各方面均不同于普通高性能混凝土的一种新型水泥基材料,实现工程材料性能的大跨越。跨河中小桥梁需要采用结构高度低、起吊重量小的上部结构,以尽可能降低桥面标高,方便运输和吊装施工。UHPC桥梁结构既具有结构高度低、运输吊装及施工方便等优点,又具有良好整体受力性能和耐久性,因而具有广阔的应用前景。

Ultra High Performance Concrete（UHPC） is a new type of cement-based material that differs from ordinary high-performance concrete in terms of material composition, mix ratio design, and microstructure, achieving a large leap in the performance of engineering materials. Cross-river small bridges require the use of superstructures with low structural heights and low lifting weights to minimize deck elevations and facilitate transportation and hoisting. The UHPC bridge structure not only has the advantages of low structural height, convenient transportation and installation, but also has good overall performance and durability, and thus has a broad application prospect.