观音岩水电站坝基第二次固结灌浆试验成果分析及建议

Suggestion and analysis on experiment result of second consolidation grouting for dam foundation of Guanyinyan Hydropower Station

观音岩水电站右岸坝基地质条件复杂,为了验证固结灌浆设计参数的合理性、探索合适的施工工艺措施,先后实施了两次试验。第一次试验成果实施后,盖重混凝土出现了裂缝,为了防止混凝土裂缝的发生,在总结第一次试验成果的基础上,进行了第二次试验。本文重点介绍第二次试验的施工工艺、成果分析。

As the geological condition of the dam foundation of Guanyinyan Hydropower Station is complicated,two times of grouting experiments are made one after another for demonstrating the reasonability of the design parameters of the consolidation grouting and seeking for the suitable technological measures for the construction. After the implementation of the first experiment,cracks occur in the concrete of the cover-weight,thus the second experiment is made for preventing the occurrence of the concrete cracking on the basis of the result from the first one. The construction technologies and analysis of the result of the second experiment are mainly introduced herein.