三峡工程地下电站进水口预建段工程质量控制

QC over Pre-Construction Section of Three Gorges Underground Station

三峡水利枢纽右岸地下电站进水口预建段工程具有工程量大,洞群密,洞径大,工期紧,质量要求高的特点。由于在施工中进行了严格的质量控制,单洞平均日进尺达０．６５ ｍ,实现了无重大安全事故和无质量事故的“双零”工程目标,被评为优良工程,并且取得了隧洞平均径向超挖厚度控制在１８．６ｃｍ的好成绩。

The pre-construction section of the Three Gorges underground electric power station located on the right side of the Three Gorges dam is featured with its huge construction quantities, dense tunnels and caverns with large diameters, tough timeframe and higher quality requirements. Thanks for the stick quality control, a double-null target was achieved in the terms of major safety accidents and quality events, The construction was evaluated as good, with a daily advance of 0. 65 m for single tunnel and an average overbreak of 18. 6 cm in the radial direction.