厄瓜多尔CCS水电站超深竖井反井钻机法施工关键问题研究  

Key Issues in Raise Boring of Super-deep Vertical Shafts of CCS Hydropower Station in Ecuador

作　　者：杨继华[1] 魏斌[1] 齐三红[1] 郭卫新[1] YANG Jihua;WEI Bing;QI Sanhong;GUO Weixin(Yellow River Engineering Consulting Co.,Ltd,Zhengzhou 450003)

机构地区：[1]黄河勘测规划设计有限公司,郑州450003

出　　处：《现代隧道技术》2018年第6期183-190,共8页Modern Tunnelling Technology

摘　　要：厄瓜多尔CCS水电站为引水式电站,布置有2条深达537.9 m的超深竖井。经过方案比选,选择了新型RHINO 1088DC反井钻机进行竖井施工。反井钻机法施工分为正钻导孔、反扩导井及人工扩挖3个阶段。针对正钻导孔时的埋钻、导孔偏斜问题,反扩导井时的塌井及刀具损坏问题,人工扩挖过程中塌方、涌水及堵井问题,文章在分析其成因的基础上提出了相应的预防及处理措施,取得了良好的施工效果。CCS水电站超深引水竖井反井钻机的成功实施对国内水利水电工程深竖井施工水平的提高具有重要的借鉴意义,相关研究内容可为类似工程的竖井施工提供参考。The CCS Hydropower Station in Ecuador is a water diversion type power station,in which two superdeep vertical shafts with depth of 537.9 m are arranged.After comparison of alternative options,a new type of 1088DC RHINO raise boring machine was chosen to construct the vertical shafts.The construction process with the raise boring machine is divided into 3 stages,i.e.pilot hole construction by forward drilling,pilot shaft construction by reverse expanded excavation and shaft construction by manual expanded excavation.In view of the problems of buried drill bits and pilot hole deflection in the first stage,the problems of shaft collapse and cutter damage in the second stage,and the problems of collapse,water inflow and shaft blocking in the third stage,some preventive and treatment measures were proposed based on causes analysis,and good construction effect was achieved.The successful construction of super-deep vertical shafts at CCS hydropower station with raise boring method is significant to improve the construction level of deep shafts of domestic water conservancy and hydropower engineering,and the related research can provide a reference for the similar shaft engineering construction.

关 键 词：CCS水电站 超深竖井 反井钻机 关键问题 处理措施 

分 类 号：TV554[水利工程—水利水电工程]