定向钻进技术在水电站竖井开挖中的应用  

Application of Directional Drilling Technology in Shaft Excavation of Hydropower Project

作　　者：蒲朝阳 袁辉 邓昀 李尚泽 蔡国忠 李文学 张守明 PU Chaoyang;YUAN Hui;DENG Y u n;LI Shangze;CAI Guozhong;LI Wenxue;Z H A N G Shouming(Beijing Zhongmei Mine Engineering Co., Ltd., Beijing 100013, China;National Engineering Laboratory of Deep Coal Mine Construction Technology, Beijing 100013,China;The 2nd Engineering Co., Ltd., China Gezhouba Group, Chengdu 610091, China)

机构地区：[1]北京中煤矿山工程有限公司,北京100013 [2]煤矿深井建设技术国家工程实验室,北京100013 [3]中国葛洲坝集团第二工程有限公司,成都610091

出　　处：《西北水电》2017年第5期43-46,共4页Northwest Hydropower

摘　　要：竖井施工一直是水电站建设中的关键环节,越来越多采用反井钻机开挖导井施工。但当遇到超深度且地层条件比较复杂,反井钻机导孔的偏斜率很难控制。为确保工程项目质量安全,厄瓜多尔索普拉多拉水电站371 m超深电缆竖井引入定向钻进技术,采用先进的顶驱钻机和无线随钻测斜仪等设备,首先施工了一条控制精度很高的导孔,有效地保证了反井钻机及后续工程的施工。导孔最终的实际偏移量为1.2 m、偏斜率为0.3%,远小于设计偏斜率1%。The shaft excavation is always the key point in the hydropower construction. The raise boring rig is increasingly applied for excavation of pilot shaft. But deviation of the pilot shaft excavated by the rig cannot be controlled easily when the extra depth and complicated stratum conditions are encountered. To secure construction quality and safety,the directional drilling technology is applied in excavation of the cable shaft up to 371 m deep,Sopladora Hydropower Station,Ecuador. The advanced equipment/instruments such as top drive drill and wireless inclinometer,etc are utilized to excavate one pilot shaft with high control precision which effectively secures sequent construction with the raise boring rig. The final displacement of the pilot shaft is 1.2 m and the deviation is 0.3% which is far lower than 1% the designed deviation.

关 键 词：竖井 定向钻进技术 顶驱钻机 无线随钻测斜仪 导孔 

分 类 号：U455.8[建筑科学—桥梁与隧道工程] P634.5[交通运输工程—道路与铁道工程]