摘要
大部分碾压混凝土坝存在渗漏缺陷问题,在长期高水头作用下,渗漏易危及大坝安全。江西山口岩碾压混凝土双曲拱坝最大坝高99.1 m,水库初期蓄水时发现浇筑层之间存在较严重的渗漏现象,通过对渗漏原因的分析,并结合防渗施工和水库用水要求,决定水面以上(168 m高程)坝体采用新型环保防水材料聚脲进行喷涂,水下坝体采用搭接帷幕灌浆进行处理。防渗处理施工成后的渗漏量监测结果满足设计要求。简要介绍了施工过程,其渗漏处理方案可以供同类工程参考。
Most RCC dams have seepage problems that would threaten the dam safety under long period of high water impound- ment. The largest height of Shankouyan RCC double -curvature dam, Jiangxi Province, is 99. lm, and there were severe pervi- ous problems at roller layers in initial impoundment process. By analyzing the seepage causes and in combination with demands of anti - seepage construction as well as the reservoir operation, we decided to carry out water - proof coating on the water - above dam surface with new environment -friendly material of polyurea, and to adopt overlapping curtain grouting to reinforce the un- derwater dam body. After the anti - seepage reinforcement, the monitoring shows that the seepage volume meets the related re- quirements. The construction process is presented, which could provide reference for similar anti - seepage reinforcements.
出处
《人民长江》
北大核心
2015年第21期68-70,97,共4页
Yangtze River
关键词
防渗方案
聚脲弹性体防渗涂层
帷幕灌浆
anti - seepage solution
anti - seepage coating of polyurea
curtain grouting
