论文部分内容阅读
一、概述1.地形、地质条件坝区位于东南塔山之间的峡谷区,在峡谷以上,河流自右岸以东南10°的方向流向峡谷,入谷后,转向东南50°,出谷后,又折而成西南45°的方向流动。坝址两岸为条形山脊,迎水面的山坡坡度约在38°左右。由于地形条件的优越,构成隧洞的线路较短,且隧洞的轴线可成直线,对选线更为有利。坝区地质由侏罗纪广元统的砂岩、粘土岩、粉砂岩等主要岩层构成,岩层成单向构造,产状平缓,走向北东78°,约与两岸条形山脊的走向平行。
I. Overview 1. Topography and Geological Conditions The dam area is located in the gorge area between the Tashan Mountains in the southeast. Above the gorge, the river flows from the right bank to the canyon at 10 ° southeast of the right bank. After entering the valley, it turns to 50 ° southeast of the valley, Southwest flow of 45 ° direction. The two sides of the dam site are bar-shaped ridges, and the slope facing the water surface is about 38 °. Due to the superior terrain conditions, the routes that make up the tunnel are short and the axes of the tunnels can be in line, which is more advantageous for route selection. The geology of the dam area is composed of the main rock layers of the Jurassic Guangyuan System, such as sandstone, clay rock and siltstone. The rock formations are formed in a one-way structure with a gentle shape and heading 78 ° N to the east parallel to the strike of the bar-shaped ridges on both sides of the strait.