边坡支护预应力锚索施工工艺和技术

为了保证施工期及运行期的边坡稳定，在龙滩水电站左岸边坡治理施工中采用了预应力锚索加固边坡。主要工作内容有：钻孔,锚索制安,内锚段及张拉段灌浆,垫座及外锚头混凝土浇筑，张拉。结合龙滩水电站地质条件，对粘土夹层，微渗水及潮湿地层，裂隙漏风地层，基岩及其他特殊地层的孔道进行了处理，并进行孔道固壁灌浆。

Construction techniques and technology of pre-stressed anchorage cable for the support of side-slope

In order to ensure the stability of side-slope during construction and operation periods, the pre-stressed anchorage cable has been used to reinforce the side slope in the construction of the left-bank side slope treatment in the Longtan Hydropower Project. It involves in boring hole, manufacturing and installing anchorage cable, grouting the inner anchoring section and pulling section, and pouring and pulling the cushion pad and outer anchorage head. According to the geological conditions of Longtan Hydropower Project, we treated the hole-paths in the clay inter-layers, micro-seepage and wet stratum, fissure layers, foundation rocks and other special layers. The consolidation grouting for the hole-paths has been adopted.