1981 Chengdu-Kunming rail crash

1981 Chengdu-Kunming railway crash

The ruin of Liziyida bridge, near Ganluo County.
Date	July 9, 1981
Time	01:47 CST 17:47 UTC
Location	Liziyida bridge near Ganluo County, Sichuan province
Country	People's Republic of China
Rail line	Chengdu–Kunming Railway
Operator	China Railways, Sichuan Railway Group
Type of incident	bridge failure
Cause	mudslide
Statistics
Trains	1
Deaths	360
Injuries	146
Route map Legend Baocheng Railway to Baoji Chengdu km 0 Wusihe(now Hanyuan) 1.6 Dadu River, ↑Ya'an/Liangshan↓ Section built after accident Liziyida Tunnel (Built after accident) 2.5 Liziyida Bridge (destructed) 2.7 Nainaibao Tunnel (derelicted) ↑Direction of Route 422 6.5 Niri Dukou Railway GelipingInitial station of Route 442 Kunming Guikun Railway to Guiyang

The 1981 Chengdu-Kunming rail crash occurred on July 9, 1981, when train number 442 passed the failed Liziyida bridge near Ganluo County, Sichuan province. More than 200 had died in the accident while 146 were injured. It is the most severe train disaster in the history of the People's Republic of China.^[1]

Accident

At 1:30 am, a mudslide occurred at the Liziyida gully, a tribute of the Dadu River. The mudslide destroyed the 17-metre (56 ft) high, 110-metre (360 ft) long Liziyida bridge.^[2]

At 1:41 am, the route 442 passenger train from Geliping to Chengdu dispatched from the Niri station after passing Route 221 (another train operated on the opposite direction, from Chengdu to Jinjiang). A minute later, staffs of Niri station discovered that they had lost phone contact to the next station Wusi River station when reporting the departure of route 442.

At 1:45 am, route 442 entered the Nainaibao tunnel with a speed of 40 km/h (25 mph). After passing the tunnel curve, the driver Wang Mingru discovered that the building near the tunnel exit had collapsed and the light reflections from the rails were missing from the Liziyida bridge. Wang Mingru tried to make an emergency stop, but failed due to steep gradients of the rail before the bridge (at 14‰). As a result, two Diesel locomotives, the baggage car No. 13, the post office van No, 12, and passenger car No. 11 fell into the river. Passenger car No. 10 and No. 9 crashed into the river bank. Passenger car No. 8 derailed in the tunnel and overturned outside of the tunnel exit.

Effects

360 people were killed including 4 crew.^[1] The railway was blocked until a temporary bridge was completed on July 24. The temporary bridge was abandoned and dismantled after a new underground tunnel opened in May 1984. The Nainaibao tunnel was abandoned.

References

1. Distribution regularity of debris flow and its hazard in upper reaches of Yangtze River and other rivers of southwestern China, by Fangqiang Wei, Yuhong Jiang, Peng Cui and Mingtao Ding, published by Wuhan University Journal of Natural Sciences in 2007, Volume 12, Number 4, page 619-626
2. Sediment studies and management strategies in China by Zhao-Yin Wang and Bingnan Lin, published by International Journal of River Basin Management on March 2004, Volume 2, Issue 1, pages 39-50

External links

• Historic pictures: 1981 Sichuan severe mudslide

Coordinates: 29°12′19″N 102°53′08″E / 29.205143°N 102.885504°E