川藏铁路水平定向试验孔施工概况和关键技术
投稿时间:2021-10-26  修订日期:2022-04-06  点此下载全文
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作者单位邮编
吴金生 中国地质科学院探矿工艺研究所 611734
罗显粱 中国地质科学院探矿工艺研究所 611734
徐正宣 中铁二院工程集团有限责任公司 610000
刘建国 中铁二院工程集团有限责任公司 610000
黄晓林 中国地质科学院探矿工艺研究所 611734
石绍云 中国地质科学院探矿工艺研究所 611734
陈永东 四川省绵阳川西北地质工程勘察有限责任公司 621000
古学超 四川省绵阳川西北地质工程勘察有限责任公司 621000
基金项目:中国地质调查局地质调查项目
中文摘要:川藏铁路地处高原高寒高山峡谷地区,铁路隧道勘查十分艰难,作者开展了千米级水平绳索取心定向钻进技术与装备研发,在川藏铁路卡子拉山一号隧道DZ-卡子拉山一号-定向实验-01孔进行应用示范。成功完成1212m水平定向试验钻孔,查明陡倾岩层3条断层和19处节理破碎带,方位角偏差≤1°,孔斜0.76°/100m,机械钻速3.09m/h,台月效率350.29m,创造国内水平绳索钻杆PQ、HQ深度588m和974m两项最新记录。攻克难进入地区钻孔无法搬迁和查明混杂陡倾岩层构造的难题,突破过去垂直“点”勘查变为水平“线”勘查,直观查明隧道洞身段地层岩性、陡倾岩层构造、水文地质条件等情况,为解决长大深埋隧道勘查难题提供借鉴,具有示范与推广作用。
中文关键词:川藏铁路  水平定向孔  绳索取心  钻探关键技术  示范工程
 
General Situation and Key Technology of Horizontal Orientation Test Hole Construction on Sichuan-Tibet Railway
Abstract:The Sichuan-Tibet Railway is located in the high-cold and alpine valley area of the plateau, and the railway tunnel survey is very difficult. The author has carried out the research and development of kilometer-level horizontal rope coring directional drilling technology and equipment, and conducted application demonstration in the DZ-Kazila Mountain No. 1-Directional Experiment-01 hole of the Kazila Mountain No. 1 Tunnel on the Sichuan-Tibet Railway. The 1212m horizontal directional test drilling was successfully completed, and 3 faults and 19 joint fracture zones of steep dip strata were identified. The azimuth deviation was less than 1°, the hole inclination was 0.76°/100m, the mechanical drilling rate was 3.09m/h, and the monthly efficiency was 350.29m, which created two latest records of PQ and HQ depth of 588m and 974m in China. Overcome the difficulty of drilling holes in difficult-to-access areas that cannot be moved and identify the structure of mixed steeply inclined rock formations, breaking through the past vertical "point" surveys and turning them into horizontal "line" surveys, visually discovering the stratum lithology, steeply inclined rock formations, and hydrology of the tunnel section Geological conditions and other conditions provide a reference for solving the difficult exploration of long and deep buried tunnels, and have the role of demonstration and promotion.
keywords:Sichuan-Tibet Railway  horizontal directional hole  rope coring  key drilling technology  demonstration project
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