摘要
老挝南俄3水电站厂房后边坡为典型薄层千枚岩局部夹片岩的强、全风化岩体,开挖卸荷后出现蠕变变形失稳,严重威胁厂房运行及施工期安全。通过监测和地质分析,制定了利用地表水防渗和降低地下水位来控制千枚岩及片岩水接触,以及采用表面、深层锚固来遏制岩体变形的综合处理措施,经多种手段的稳定性分析论证和后续工程监测,确认此治理措施对整体边坡稳定作用显著,总体变形达到运行期要求。
The rear slope in Laos Nan’e 3 Hydropower Stationbelongs to a strong and fully weathered rock mass with typical thin layer phyllite,which is partially intercalated with schist.Creep deformation and instability occur after excavation and unloading,thereby seriously threatening the operation of the workshop and safety during construction.Through monitoring and geological analysis,the comprehensive treatment measures of using surface water seepage prevention and reducing groundwater level to control the water contact between phyllite and schist,and using surface and deep anchorage to curb the deformation and stability of rock mass are formulated.It is confirmed that the control measure has significant stabilizing effect on the overall slope through stability analysis demonstration and subsequent engineering monitoring by many means.The overall deformation reaches the requirements during operation.
作者
魏兴存
刘慧芳
李翔
WEI Xingcun;LIU Huifang;LI Xiang(Powerchina Sinohydro Engineering Bureau 10 Co.,Ltd.,Chengdu 610072,China)
出处
《水利建设与管理》
2021年第12期42-48,共7页
Water Conservancy Construction and Management
关键词
边坡
千枚岩
综合治理
稳定分析
监测
slope
phyllite
comprehensive management
stability analysis
monitoring
