導向取心鑽探技術在地質調查之應用

Directional Core Drilling Technique Using In Geological Exploration

侯秉承(Ping-Cheng Hou) ； 陳晟(Sheng Chen)

《地工技術》 89期 (2002/02) Pp. 71-82

https://doi.org/10.30140/SG.200202.0007

摘要

導向取心鑽探技術可藉由控制鑽孔方向、傾角之導向鑽探設備向預定探查目標鑽進，並透過精密導向測量儀器檢測及記錄鑽進路徑，將鑽孔依既定路徑精確導向預定位置，並透過取心設備取得岩心，以進行地質研判及地工試驗。導向鑽探技術多應用於傳統鑽探無法或難以鑽及之處，其最大優點在於可沿特定工程結構物之分布，依既定路線鑽取岩心，以直接反映地下結構物所處位置之環境特性，並可藉由地質資料的明確掌握，進而對於工程規劃設計、工期預估、經費估算及工法研選等提供較精準的依據。

關鍵字

導向取心鑽探 ； 井測儀 ； 鑽孔偏斜校正

並列摘要

By means of directional drilling equipment and borehole survey instrument to control the drilling azimuth and dip, the directional core drilling technique can be applied to drill and take-core along a planned drilling path, straight or curve, in order to investigate the geological and geotechnical conditions. This technique is usually applied in those area where the conventional drilling technique is hard to deal with. The most advantage of directional core drilling technique is that the drilling can be designed to go along a particular path to the foundation where the underground structure will be constructed. In addition, by means of core recovery along borehole path, the geological and geotechnical conditions of the foundation can be clearly understood. The information thus obtained is considered very useful for project planning and design, and can be used as a sound basis to estimate the construction schedule, engineering cost and to select the right construction method.

並列關鍵字

directional core drilling ； borehole survey instrument ； drilling direction correction