Hongqi Bridge
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China National Highway 317Hongqi Bridge 红旗大桥 | |
|---|---|
| Coordinates | 31°49′14″N 101°54′31″E / 31.82053°N 101.908584°E |
| Carried | China National Highway 317 |
| Locale | Maerkang county-level city, Aba Tibetan and Qiang Autonomous Prefecture, Sichuan, China |
| Official name | Hongqi Grand Bridge |
| Characteristics | |
| Total length | 758 metres (2,487 ft) |
| Height | 172 metres (564 ft)[1] |
| Longest span | 220 metres (720 ft)[1] |
| No. of spans | 3 (central section) |
| History | |
| Construction end | 14 January 2025 |
| Construction cost | 300 million RMB[2] |
| Opened | 13 April 2025 |
| Collapsed | 11 November 2025 (western approach) |
| Statistics | |
| Daily traffic | 2 lanes motorway |
| Location | |
 Interactive map of Hongqi Bridge | |
Hongqi Bridge was a 172-metre (564 ft) tall elevated structure across a steep canyon in Barkam in the Ngawa Tibetan and Qiang Autonomous Prefecture of Sichuan Province, China, spanning the Zumuzu River, eastern tributary of the Dadu River.[3] It was an important waypoint located within Sichuan connecting the rest of China to the Tibet Autonomous Region. The bridge was also part of China National Highway 317[4] of the Chinese highway network and travels near the Shuangjiangkou Dam.[5][6]
Chengdu Engineering Corporation, a subsidiary of China Power Construction Corporation under the Assets Supervision and Administration Commission, handled the bridge's design and construction. The Sichuan Expressway Construction and Development Group posted a now-deleted video of the final concrete pouring on 14 January 2025, signifying the project's completion after five years of construction.[2][7] The bridge was opened to traffic on 13 April 2025.[5][8] On 11 November 2025, just days after the inauguration of the nearby Shuangjiangkou Dam,[9] a landslide caused the collapse of the western bridge approach and its part of the roadbed.[10][11]
Hongqi Bridge was a cantilevered concrete bridge with a total length of 758 metres (2,487 ft). The central section consisted of a main span of 220 metres (720 ft) flanked by two spans of 120 metres (390 ft) each, supported by piers as tall as 172 metres (564 ft) above the foundation.[1] The bridge deck was a continuous rigid frame structure made of prestressed concrete, consisting of the three central spans connected as a single unit.[8] The bridge carried a two-lane road, which exited a tunnel on the steep east (left) bank, crossing the bridge and its approaches, and entered a tunnel on the steep west (right) bank.[11]
