樱孜渡水电站拱坝新老坝体的衔接措施

Analysis on the Connecting Measures of the New and Old Dam Body of Yingzidu Hydropower Station Arch Dam

樱孜渡水电站位于贵州省纳雍县新房乡,大坝为混凝土双曲拱坝,最大坝高58.1 m。2010年浇筑了28.6 m高的坝体后项目停工,并于2018年10月项目复工。在已浇筑8年多的坝体上继续筑坝,且该衔接部位正好在拱坝关键的腰部,因此新老坝体的衔接措施尤为重要。结合工程实际情况,从坝基衔接、混凝土衔接以及分缝衔接3个方面采取了相应措施。目前,大坝已施工完毕,衔接部位未发现开裂渗水等现象,外观质量良好。

Yingzidu hydropower station is located in Xinfang Township,Nayong County,Guizhou Province.The dam is a concrete double curvature arch dam with the maximum dam height of 58.1 m.After the 28.6 m high dam body was poured in 2010,the project stopped and resumed in October 2018.It is very important to continue to build the dam on the dam which has been poured for more than 8 years,and the connecting part is just at the key waist of the arch dam.Combined with the actual situation of the project,the corresponding measures are taken from three aspects of concrete connection,joint connection and dam foundation connection.At present,the construction of the dam has been completed,and no cracks and water seepage have been found at the connecting parts,with good appearance quality.