香丽高速公路金沙江大桥跨越虎跳峡深切峡谷,地形地貌、地质构造、地层岩性复杂,两岸地形、风化带、卸荷带不对称发育,不良地质很发育;复杂地质条件给地质比选带来了很大困难,如何从复杂地质环境中寻找出关键地质因素,就成为了桥址地质比选成功与否的关键;经过勘察综合分析后发现,区内地质构造对地形地貌、地层岩性、不良地质、岸坡结构及风化带、卸荷带等地质条件均有着密切关联,在地质比选中起到提纲挈领性的关键作用。 Hongli Expressway Jinsha River Bridge across the Tiger Leaping Gorge deep canyons, topography, geological structure, stratigraphic lithology complex, cross-Strait, weathering belt, unloading belt asymmetric development, poor geological development; complex geological conditions for geological comparison It has become very difficult. How to find out the key geological factors from the complex geological environment has become the key to the success of geological comparisons at the bridge site. After the comprehensive analysis of the survey, it is found that the geological structure in the area has great influence on the topography, Geological, adverse geology, bank structure and weathering belt, unloading belt and other geological conditions are closely related, play a key role in geological comparison.