孟良河倒虹吸预应力筋张拉顺序研究

The Tension Sequence of Prestressed Bar in the Inverted Siphon Project across MengLiang River

孟良河渠道倒虹吸工程是南水北调中线京石段供水工程的一个重要组成部分，该工程为预应力结构，预应力筋张拉是至关重要的施工工序，为保证通水目标的实现，通过研究和实践优化了张拉顺序，并成功应用，在保证工程质量的前提下，加快了施工进度，减少了基坑降水时间，节约了工程施工成本。

The inverted siphon project across Mengliang River is an important component in the Jingshi Section emergency water supply project of the South-to-North Water Transfer Project. As a prestressed structure, the tension sequence of prestressed bar is the most important process. In order to ensure the water supply target, it studied the reasonable tension sequence by theoretical research and experiment and used in the project successfully. There are some achievements, including accelerating construction progress, reducing discharge time of foundation, and saving the construction cost.