论文部分内容阅读
针对小浪底水利枢纽工程尾水渠区域节理裂隙发育、地下水丰富的情况 ,为确保后期运行安全 ,在尾水渠边墙和隔墙混凝土衬砌后 ,采用双层保护的 5 0 0kN预应力锚杆加强支护 ,并介绍预应力锚杆的结构、技术参数以及施工程序 .在预应力锚杆施工中 ,对钻孔时遇到的渗水问题采用锚杆固结灌浆处理 ;对破碎带则先进行固结灌浆 ,然后重新钻孔安装锚杆 ;对砂浆锚杆 ,根据现场情况大多被取消安装 ,作为永久排水孔 .2年多的运行情况表明 ,采用预应力锚杆加固确保了尾水渠边墙和隔墙的稳定性
In view of the development of joint fissures and abundant groundwater in the tailrace canal area of Xiaolangdi Hydro Project, to ensure the post-operation safety, after the tailing canal side wall and the concrete wall of the partition wall are lined, the double-layer pre-stressed 500kN bolting is used to reinforce the support , And introduces the structure, technical parameters and construction procedures of prestressed anchor.In the construction of prestressed anchor, the grouting of grouting is carried out on the seepage problems encountered during drilling, and the consolidation grouting , And then re-drilling installation of anchor; mortar anchor, according to the scene most of the situation was canceled as a permanent drainage hole .2 years of operation shows that the use of prestressed anchor reinforcement to ensure that the tailrace walls and partitions Stability