Tongmai Bridge

Tongmai bridge is the throat project of 318 national highway of Sichuan Tibet highway, and it is a temporary traffic protection project. The bridge is designed as a double tower and double span suspension bridge, crossing Yigong Zangbu, a tributary of PALONG Zangbu, with a total length of 258m, a main span of 210m and a height of 31.5m.

Tongmai Bridge

Tongmai bridge is the throat project of the famous Tongmai natural danger section of 318 National Highway on the south line of Sichuan Tibet highway. There are three river crossing bridges in different historical periods in the same location. The Tongmai bridge is mainly open to traffic, which is a single tower inclined bridge. The traffic of motor vehicles has been suspended in the original two bridges.

Now the three bridges have become a scenic spot. The lowest one is a cable bridge.

Historical evolution

1. The first Tongmai bridge: it was built in 1950's. in 2000, the Yigong lake dam broke and destroyed it (the Yajiang Jiefang Bridge in Beibeng township of Motuo County was also destroyed).

2. The second Tongmai bridge broke down in 2013 and 2015.

3. The third Tongmai bridge: Tongmai bridge was opened to traffic at the end of 2015. It is designed as a single tower and single span self anchored space main cable suspension bridge, crossing palongzangbo, a tributary of single tower, yigongzangbo, with a total length of 415.8 meters, a main span of 256 meters and a height of 59.5 meters.

The first bridge was washed away

On April 9, 2000, a huge landslide occurred in Yigong lake, Tibet. Especially after the water burst from the Yigong lake, a permanent reinforced concrete bridge and some nearby roads were destroyed. The traffic on the South Sichuan Tibet line was completely interrupted, and more than 90 townships in Motuo, Bomi and Linzhi counties became isolated Islands. At that time, even the Yajiang Jiefang Bridge in Beibeng township of Motuo County was destroyed.

Tongmai bridge is a traffic protection project. The completion of the bridge makes the interrupted National Highway 318 unblocked. Tongmai bridge is limited to two vehicles at a time. When vehicles cross the bridge, they can obviously feel the shaking of the cable bridge. And for safety reasons, it is generally not allowed to take photos of Tongmai bridge.

Now the original double tower and double span bridge has suspended the traffic of motor vehicles.

Failure of the second bridge

The rivets fell off in 2013

At 23:27 on August 2, 2013, the rivets of Tongmai bridge fell off and the bridge deck collapsed. Two local villagers in Bomi county are missing, and two tourists are also missing after the collapse of the bridge. The number of people missing due to the collapse of the bridge has increased to four. A truck on the bridge fell into the river. Two people on board were missing and traffic was interrupted.

After investigation, the two drivers on the truck were villagers of Gongzhong village, Yigong Township, Bomi county. In addition, two tourists were missing after the bridge collapsed. Two tourists, one male and one female, entered Tibet on foot.

After the incident, the local transportation department set up cards on both sides of the Tongmai bridge to implement traffic control, persuade and guide people and vehicles to return, and do a good job in pacifying the families of the missing drivers and passengers.

After 40 days of intensive construction, Tongmai bridge of Sichuan Tibet highway, which was broken due to collapse on August 2, 2013, was successfully restored to traffic on the morning of September 10, 2013.

Under the premise of ensuring the quality and safety, design and construction are carried out at the same time to ensure the scientific, reasonable, orderly and effective construction.

Dislocation of steel frame structure in 2015

On the morning of January 26, 2015, traffic was interrupted due to dislocation of steel frame structure, and all vehicles were suspended. As of 15:00 on the 26th, the maintenance work is still in progress, and the opening time has not been determined. The officers and soldiers guarding the bridge reminded that the past drivers and passengers, self driving and riding tourists need to adjust their travel arrangements.

The third Tongmai Bridge

Tongmai bridge was opened to traffic at the end of 2015. It is designed as a single tower and single span space cable suspension bridge. Crossing Palongzangbu is the tributary of single tower yigongzangbu. The total length of the bridge is 415.7 meters, the main span is 256 meters, and the pier height is 59.5 meters.

Tongmai bridge successfully completed the completion and special acceptance on November 28, 2015, and officially entered the trial operation stage and was officially opened to traffic on November 29.

Tongmai bridge has a main span of 256 meters, a single tower height of 59.5 meters, and a central deck 60 meters above the river. It is a single tower single span steel truss suspension bridge. The design vehicle load grade of the bridge is highway - II, the design speed is 40 km / h, the bridge width is 12 meters, and the design reference service life is 100 years.

Traffic information

It is located on national highway 318.

Address: the intersection of Yigong Zangbu and PALONG Zangbu in Bomi County, Nyingchi Prefecture, Tibet

Longitude: 95.065704345703

Latitude: 30.095335006714

Chinese PinYin : Tong Mai Da Qiao