川藏铁路勘察超长水平孔绳索取心钻探技术  

Wire‑line core drilling technology of ultra‑long horizontal investigation boreholes for the Sichuan-Tibet Railway

作　　者：肖华 刘建国[2] 徐正宣[2] 马映辉 XIAO Hua;LIU Jianguo;XU Zhengxuan;MA Yinghui(Jinzuan Company of Team 402,Sichuan Bureau of Geology&Mineral Resources,Chengdu Sichuan 611743,China;China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu Sichuan 610031,China)

机构地区：[1]四川省地质矿产勘查开发局四〇二地质队金钻公司,四川成都611743 [2]中铁二院工程集团有限责任公司,四川成都610031

出　　处：《钻探工程》2021年第5期18-26,共9页Drilling Engineering

摘　　要：新建川藏铁路途经川西高原地区,区内地势险峻、生态脆弱、道路交通条件差,开展工程勘察钻探的难度很大。其中涉及到大量特长深埋隧道的勘察。水平取心钻探是隧道勘察的重要手段之一。针对工区条件,EP600Plus型便携式钻机原设计无法施工水平孔、水平孔钻进阻力大、大量高压涌水制约取心效率等问题,通过改造升级和加工创新等多种方法灵活运用,配套辅助设备并首创架管便桥便道等环保措施,采用绳索取心钻探技术,完成最深903.28 m的水平取心钻孔。探索建立的整套技术方案现已逐渐应用成熟,其主要成果可为同类型工程项目提供参考。The newly‑built Sichuan-Tibet Railway passes through the Western Sichuan Plateau.Precipitous topography,vulnerable ecology and poor traffic conditions of the region bring about many obstacles for carrying out investigation drilling,especially for lots of extra‑long deep tunnels.Horizontal core drilling is one of the important means for investigation for tunnels.In view of these conditions,the original design of the portable drilling rig EP600Plus will face such problems as inability to drill horizontal boreholes,high drilling resistance,low coring efficiency due to frequent high‑pressure water gushing.With flexible application of various methods including drill upgrading,process innovation,supply of auxiliary equipment,and building access bridges and roads with steel pipes for the first time as environment protection measures,use wire‑line core drilling technology,a horizontal coring borehole was completed at depth of 903.28m with a full technical plan established and proven with application.The main achievements can provide important reference for similar investigation projects.

关 键 词：超长水平钻孔 绳索取心钻探 便携式钻机 绿色勘察 架管便桥 川藏铁路 

分 类 号：P634[天文地球—地质矿产勘探] U452.1[天文地球—地质学]