三峡工程左岸引水压力管道施工综述

Construction of left bank diversion penstocks for Three Gorges Project

三峡工程引水压力管道具有工程量大、工期长、混凝土外观要求高、钢管直径大、金属结构制造安装技术含量高、甚至现行规范不能完全覆盖等特点。施工中应用了专用定型模板、钢筋快速连接技术、My-box设备、高流态混凝土、拔管法灌浆施工、全位置自动焊接、巨型伸缩节波纹管一次液压成型等多种新方法和新工艺。

The TGP diversion penstock is characterized by huge construction quantity, long construction period, high requirement for concrete surface, large penstock diameter, high technical intensity in metal works manufacture and installation and even the current specifications not affording to cover the problems. A lot of new methods and techniques, including special type formwork, re-bar quick connecting technique, My-box equipment, quaking concrete, tube drawing grouting, all-position automatic welding, huge expansion joint and once-hydroformed corrugated pipe, etc were used during construction.