研究目的: 山区铁路地形地质条件极为复杂多变,工程地质问题突出且隐蔽性强,加之交通不便,人迹罕至,陡倾岩层分布范围广,生态环境脆弱,环境保护要求高,钻探是最直接、最准确、最有效的隧道工程勘察方法,传统的铁路隧道竖向钻探实施困难,导致隧道长大段落勘探资料空白,严重制约勘察设计工作,亟待开展铁路隧道超长定向钻探技术,特别是超千米水平孔绳索取心定向钻探关键技术研究。
研究结论: (1)超长水平孔绳索取心定向钻探是一种不提升钻杆柱而由钻杆内捞取岩心的先进钻进方法,是复杂艰险山区长大深埋铁路隧道勘察的关键技术;(2)通过开展定向钻探方法与技术、装备及器具、绿色工程材料研究,构建了铁路隧道超长水平孔绳索取心定向钻探技术体系;(3)建立了铁路隧道超长水平孔绳索取心定向钻探方法及流程,创造了中国铁路勘察史上最长水平孔钻探纪录1 888.88 m;(4)本文研究的超长水平孔绳索取心定向钻探技术在新时代“西部大开发”、“交通强国”战略、“一带一路”建设中具有广阔的应用前景。

Research purposes: The topographic and geological conditions of the mountainous area railway are extremely complex and changeable, and the engineering geological problems are prominent and hidden. In addition, the traffic is inconvenient, the people are rarely visited, the steep rock strata are widely distributed, the ecological environment is fragile, and the environmental protection requirements are high. Drilling is the most direct, accurate and effective tunnel engineering survey method. The implementation of traditional vertical drilling of railway tunnel is difficult, resulting in the blank of exploration data in long and large sections of tunnel, which seriously restricts the survey and design work, so it is urgent to carry out the research on ultra long directional drilling technology in railway tunnel, especially the key technology of ultra-kilometer horizontal hole rope coring directional drilling.
Research conclusions: (1) The ultra long horizontal hole rope coring directional drilling is an advanced drilling method of taking cores from the drill pipe without lifting the drill pipe string. It is the key technology for the investigation of long, deep buried railway tunnels in complex and dangerous mountainous areas. (2) Through the research on directional drilling methods and technologies, equipment and instruments, and green engineering materials, the directional drilling technology system of super long horizontal hole rope for core in railway tunnel is constructed. (3) The method and process of directional drilling for the core of super long horizontal hole rope in railway tunnel are established, and the longest horizontal hole drilling record in the history of railway survey in China is 1888.88 m. (4) The ultra long horizontal hole rope coring directional drilling technology studied in this paper has a broad application prospect in the Western Development, Transportation Power strategy and the the Belt and Road construction in the new era.