长距离水平定向孔取芯技术应用——以天山胜利隧道水平定向孔地质勘察为例  

Application of Long-Distance Horizontal Directional Borehole Coring Technology:A Case Study of Geological Investigation of Tianshan Shengli Tunnel

作　　者：陈云龙 刘耿仁[2] 蔡家品 刘协鲁 阮海龙 江玉文 CHEN Yunlong;LIU Gengren;CAI Jiapin;LIU Xielu;RUAN Hailong;JIANG Yuwen(Beijing Institute of Exploring Engineering,Beijing 100083,China;CCCC Second Highway Consultants Co.,Ltd.,Wuhan 430052,Hubei,China;Sichuan Conqueror Petroleum Science and Technology Corporation LTD,Deyang 618000,Sichuan,China)

机构地区：[1]北京探矿工程研究所,北京100083 [2]中交第二公路勘察设计研究院有限公司,湖北武汉430052 [3]四川康克石油科技有限公司,四川德阳618000

出　　处：《隧道建设（中英文）》2023年第S01期298-303,共6页Tunnel Construction

基　　金：地质调查海洋钻探项目(DD20221722)。

摘　　要：为在长距离大埋深隧道工程施工前更全面地掌握隧道全断面地质信息,借鉴垂直钻井取芯经验,结合水平取芯特点,研制TK-SQ215大直径水平孔取芯钻具,制定特殊的取芯工艺,完成隧道工程1 900 m长距离水平孔取芯作业,取芯进尺2.31 m,采获岩芯2.2 m,岩芯采取率为95%。结果表明:采用长距离水平孔取芯技术通过布设1个水平孔即可获取沿隧道走向的全断面地质信息,改变了传统隧道工程前期勘察采用的垂直、多井施工方式,探索出了一套从下钻到取芯再到提钻的全流程水平取芯工艺。To clearly identify the full-section geological information of the tunnel with long distance and large burial depth before construction,the TK-SQ215 large-diameter horizontal borehole coring is developed based on the vertical drilling and coring technology and the characteristics of horizontal coring.Special coring technology is implemented,which successfully implement 1900-m long-distance horizontal drilling and coring operation,2.31-m coring advance,2.2 m coring samples,and 95%coring rate.The results show that a horizontal drilling hole along the tunnel direction arranged can collect the full-face tunnel geological information when using long-distance horizontal coring technology,which does not use vertical and multiple shaft construction,thus it is simple and efficient.

关 键 词：隧道工程 地质勘察 水平定向钻进技术 取芯钻具 金刚石钻头 

分 类 号：U45[建筑科学—桥梁与隧道工程]