后张法预应力箱梁施工质量控制

后张法预应力混凝土简支箱梁在铁路客运专线中被广泛应用,箱梁具有其他梁型无可比拟的优越性,具有平稳性高、承载能力高、刚度大的特点。简述了后张法预应力箱梁的施工质量控制问题,包括预应力张拉前预应力定位网片的制作与安装、管道的敷设,预应力施加阶段钢绞线及张拉机具的质量控制、张拉准备工作、预应力钢绞线伸长量及回缩量控制以及张拉后的质量检查。

Construction Quality Control of Post-tensioned Prestressed Box Gird

The post-tensioned prestressed concrete simply supported box gird has been widely applied in of the railway passenger line.The box gird has incomparable superiorities of the higher stability,higher carrying capacity and higher stiffness.This paper expounds briefly the problem of prestressed post-tensioned box gird construction quality control,including the manufacture and installation of prestressed location meshes and the laying of pipeline before pretensioning,the quality control of steel wires and tensio...