地下洞室围岩地质编录方法

在水电工程施工阶段常常需要进行大量的大比例尺地质编录，这些工作主要围绕基础、边坡和地下洞室展开。由于地下洞室体型复杂，从而给地质编录带来很多困难；而如何合理地将体型复杂的地下洞室各个壁、顶、底展开为平面、并将各种地质信息采用投影或直接绘制的方法置于地质编录图上，则是编录的重点和难点。基于此，根据目前国内和美国规范、手册推荐的有关地下洞室围岩编录的方法，结合具体工作实践，重点对隧洞转弯段“开口法”及隧洞地质信息编录成图方法等进行了说明和总结。

Geological mapping method of underground openings

During construction of hydropower projects, a lot of mapping work is required, which involves foundations, slopes and underground openings in rock. The complex shape of underground openings brings difficulties to the mapping work, particularly in converting every roof, side wall and bottom of those complicated underground openings into a plane, and recording geological data with projection or direct mapping method. This paper presents the ＂opening method＂ of tunnel bending and geological mapping method used by Chinese engineers, ASTM, and related manuals.