南水北调中线漕河渡槽试验跨三向预应力施工

Three-dimensional Prestress Construction of Trial Span in Caohe Aqueduct of Median-line South-to-North Water Transfer Project

漕河渡槽采用三向预应力设计,为验证设计和取得施工参数,在漕河渡槽30 m跨段终点,进行了试验跨的施工,并进行了预应力、应力—应变等的试验监测。本文重点介绍三向预应力施工。

Caohe aqueduct adopts three-dimensional prestress design. In order to testify the rationality of the design and to obtain the construction parameters, the trial span is constructed at the end of Caohe aqueduct, the length of the trial span is about 30 m. And prestress, strain and stress are monitored in the trial span. The conditions of the three-dimensional prestress construction are introduced emphatically in this paper.