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二滩水电站桐子林雅砻江大桥,位于安宁河口下游2km处、成昆铁路桐子林车站附近,是二滩电站对外交通的咽喉。设计桥型为预应力混凝土连续梯形箱梁单塔斜拉桥,主孔跨径120m。全长311.5m,设计荷载为汽—40级(车辆横向布置为轻、重车各一列)、挂车—240(另加37t重的牵引车);验算人群荷载为250kg/m~2。桥面净宽:净—10+2×1.5m(1.5m为人行道宽),索塔为倒Y型四柱式门式索塔,高50m;双排四柱塔墩,高29.4m。塔墩下由双排4根桩径2.3m的钻孔灌注桩及承台组成、
Ertan Hydropower Station Tongzilin Yalong River Bridge, located at 2km downstream of the Anning Estuary, near the Tongzilin Station of Cheng-Kun Railway, which is the throat of the external traffic of Ertan Hydropower Station. The design of the bridge is a single-pylon cable-stayed bridge with prestressed concrete continuous trapezoidal box girder with a main span of 120m. It has a total length of 311.5m and a design load of steam of -40 level (light and heavy vehicles are arranged horizontally in one row), trailer-240 (plus a 37t heavy towing vehicle), and the crowd load is 250kg / m ~ 2. Net deck width: net -10 +2 × 1.5m (1.5m for the sidewalk wide), the pylon inverted Y-shaped four-column portal pylon, 50m high; double row four-column tower pier, 29.4m high. The tower pier consists of two rows of four bored piles and pile caps with pile diameter of 2.3m,