万家寨引黄工程总干线一、二级地下泵站开挖施工

引黄工程总干线一、二级地下泵站共130多个洞室，布置上立体交叉、纵横交错，开挖及一次性支护同时进行，但由于施工组织设计和进度安排工作做得较好，配备了较为先进和齐全的机械设备，采用和推广了一些新的施工工艺，因此，在测量控制、泵站厂房顶拱施工、竖井施工、岩锚梁基础开挖和监测仪器埋设方面取得了一些成果。

Excavation Construction of Underground Pump Station No.1 and No.2 in Wanjiazhai Yellow River Diversion Project

Underground pump station No.1 and No.2 of Yellow River Diversion Project includes more than 130 caverns in total,which are arranged in crisscross pattern and in grade separation,excavation and single support were conducted concurrently. As the construction organization design and progress program were made well and other measures were adopted ,such as using advanced and complete machinery,adopting and spreading some new construction workmanship,the Sixth Engineering Bureau of China Water Conservancy and Hydropower only spent 19.5 months finishing the excavation and single support for two large-scale underground pump stations according to the international project convention and under the condition of ensuring the construction quality and safety.The constnuction of these two pump stations was started at the same time and completed at the same time,which created a new record of water conservancy and hydropower construction all over the country.