龙滩水电站右岸导流洞施工综述

龙滩右岸导流洞为亚洲最大的导流洞。地质条件较差，断层和层问错动达400多组，洞脸有4大断层通过。经过用爆破地震波测量试验，确定了中、下层梯段爆破参数，控制开挖爆破诱发地震对围岩稳定性及支护结构质量的影响，使爆破冲击荷载对保留围岩的损伤及劣化得到减少。洞身边墙混凝土浇筑采用刚度大、大块及表面平整度好的多卡悬臂模板，能保证质量、使用灵活、有利于赶工。混凝土的浇筑采取了有效的施工措施，控制了裂缝的产生，保证了混凝土施工质量及表面外观质量。

General description of the construction of the right bank diversion tunnel of Longtan Hydropower Station

The right bank diversion tunnel of Longtan Hydropower Project is the largest one in Asia. Its geological condition is relatively bad with more than 400 groups of faults and inter-layer slides and 4 groups of faults passing through the portals. Based on measurement test of blasting seismic wave, the explosion parameters of the middle and lower layers were determined to control the influence of excavation and blasting on the stability of surrounding rock and the quality of support structure. The concrete placement of lateral wall adopted stiff, large and leveling suspension form works in order to ensure the quality and easy handling. Some effective measures have been taken in the placement of concrete to control the occurrence of crack and to ensure the construction quality and appearance quality.