三峡工程建基岩体彩色影像图的研究和试验

Study on applying colour electronic image technique to geologic mapping of TGP foundation rock

用传统的编录方法对高边坡建基岩体进行地质编录，不仅存在工作难度大，工期长，无法满足工程进度要求等缺点，且资料保存困难，复制工作量也大。因此试验研究用制作建基岩体彩色影像图的方法替代传统的编录技术。该项试验是在全天候条件下进行的，分为野外技术和内业处理技术两阶段。野外试验和研究的侧重点是确定投影基准面，像控点及野外快速编录技术。内业处理主要研究用计算机图像处理技术制作岩体彩色影像图。运用该项技术对三峡工程临时船闸闸室建基面进行地质编录，取得了满意的效果，所得岩体彩色影像图，不仅图像清晰、逼真、信息量丰富，整体感强，且资料可保存在计算机光盘里，使用时可直接由彩色喷墨绘图仪输出。

To make geologic map of high slope rock mass by conventional method has such disadvantages as difficult operation condition, long work period, inconvenient data preservation, and large amount of reproduction. Thus, application of the colour electronic image technique to geologic mapping of rock mass has been studied so as to replace the conventional technique. This study is divided into two stages, namely field operation and office processing stages, with the field operation conducted in all weathers. The emphasis of field experiment and study is put on the determination of projection reference plane and image control point as well as quick mapping technique. The major effort of office processing is to use the computer image processing technique to develop the colour image map for rock mass. This technique has been applied to geologic mapping of excavated rock surface of lock chamber of TGP temporary shiplock, and the resulting colour image maps not only have excellent clarity, vivid description, abundant information amount, and perfect integral sensing, but also can be preserved in a disk for use at any time.