桥梁预应力混凝土施工技术要点  

Main Points of Construction Technology of Bridge Prestressed Concrete

作　　者：任富斌 Ren Fu-bin

机构地区：[1]中铁二十局集团第六工程有限公司

出　　处：《建筑技术开发》2019年第14期69-70,共2页Building Technology Development

摘　　要：由于普通钢筋混凝土结构在承受弯矩作用下,受拉区混凝土容易开裂,结构自重大,跨越能力小。为了解决这些问题,预应力混凝土结构应运而生。由于采用了高强度钢材和高强度混凝土,有效的减小了结构截面尺寸、降低了结构自重、防止开裂和减少挠度都十分有效,尤其是现代预应力技术的成熟,推动了大跨度桥梁的快速发展。论述了桥梁预应力混凝土施工技术,并着重介绍了后张法预应力混凝土施工技术要点。Because the ordinary reinforced concrete structure is subjected to bending moment,the tension zone is easy to crack, and the structure is self-important and the spanning ability is small.In order to solve these problems,prestressed concrete structures have emerged.Due to the use of high-strength steel and high-strength concrete,it is effective to reduce the structural section size,reduce the structural weight,prevent cracking and reduce deflection,especially the maturity of modern prestressing technology,which promotes the rapidity of long-span bridges.development of.This paper mainly discusses the prestressed concrete construction technology of bridges, and focuses on the technical points of post-tensioned prestressed concrete construction.

关 键 词：桥梁 预应力混凝土 施工工艺 

分 类 号：TU997[建筑科学—市政工程] U445.57[建筑科学—桥梁与隧道工程]