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现今,预后张法应力混凝土桥梁占据了我国大部分公路预应力桥梁。等到混凝土到达一定强度然后进行拆模,再将预应力筋穿入到桥梁梁体事先预留的孔道中,安装好锚具后用器械将锚固张拉好,这样预应力筋就能对桥梁梁体施加应力,这就是预应力混凝土桥梁中的后张技术。锚具的种类和预应力筋不同,对应的张拉方法也不尽相同。比较常用的有钢丝束墩头锚固体系和钢绞线等等。本文将就预应力混凝土桥梁张拉技术展开探讨,并提出相关的意见和建议。
Nowadays, the tension-stress concrete bridge of Zhangjiakou occupies most of the prestressed bridges in our country. Wait until the concrete reaches a certain strength and then remove the mold, and then penetrate the prestressed tendons pre-reserved hole in the bridge beam body, the anchor is installed after the anchor with a tensile instrument, so prestressed tendons will be able to bridge beam Body stress, which is post-tensioning technology in prestressed concrete bridges. The types of anchors are different from the prestressing tendons and the corresponding methods of tensioning are different. The more commonly used steel beam pier head anchor system and strand and so on. This article will discuss the prestressed concrete bridge tensioning technology, and put forward relevant opinions and suggestions.