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-built section of the inlet of the underground power station on the right bank of the Three Gorges Project has the characteristics of large engineering quantity, dense hole group, large hole diameter, tight schedule and high quality requirements. As a result of strict quality control during construction, the average daily footage of a single hole reached 0.65 m, achieving the goal of “double zero” without major accidents and without quality accidents. The project was rated as a fine project and a tunnel was obtained The average radial overdrive thickness is controlled at a good result of 18.6cm.