Where is Siduhe Bridge?

Siduhe Bridge is located in Yesanguan Town, Badong County, Enshi Tujia and Miao Autonomous Prefecture, Hubei Province.

Siduhe Bridge is a bridge connecting Yichang City, Enshi Tujia and Miao Autonomous Prefecture, Hubei Province, China and expressway City, Enshi City. It is a part of expressway in Huyu (G50 in expressway) and the first large suspension bridge in China.

Located in Wuling Mountain area of western Hubei, it spans mountains and deep valleys, and is the first large suspension bridge in China. The total length of the bridge is1365m, which consists of a bridge of1105m and a subgrade of 228.9m..

The main span of the bridge is 900 meters, the height difference from the top of the tower to the bottom of the canyon is 650 meters, and the bridge deck is 560 meters from the bottom of the valley, which is equivalent to 200 stories high. During the construction, with the help of the rocket launcher, the cable crossed the canyon (3.60 seconds), creating a precedent in the history of bridge construction in the world.

Siduhe Bridge started construction on August 20, 2004; On June 24, 2008 10, the closure project was completed and the whole bridge was connected; It was opened to traffic on June 5438+065438+1October 65438+May 2009. Siduhe Bridge starts from Yesanguan Tunnel in the west, crosses Siduhe waterway in the upper part and reaches Baziling Tunnel in the east; The bridge deck is a two-way four-lane expressway with a design speed of 80 km/h.

Scientific and Technological Innovation and Application of New Technology of Siduhe Bridge

1. The tunnel anchor is systematically and scientifically studied, such as the mechanical properties test of rock mass, the largest pull-out test of tunnel anchor model in China, the back analysis of mechanical parameters and rheological parameters of rock mass, the three-dimensional numerical analysis of surrounding rock of tunnel anchor, etc., which innovates the tunnel anchor construction technology and improves the technical level of tunnel anchor construction.

2. The innovative scheme of "3 tractors+1 auxiliary pusher" was adopted in the cable saddle transportation, which solved the difficult problem of transporting large pieces under the condition of steep slope of mountain roads.

3. The single cable variable construction technology for anchoring prestressed anchorage system is put forward for the first time. By spraying epoxy steel strand honeycomb tube bundle, the first 37-hole large-tonnage anchor pad in China was developed, and a set of construction technology of prestressed anchorage system of suspension bridge anchorage was innovated, which reduced the concrete volume, prolonged the service life of suspension bridge cables, saved the maintenance cost during the operation period of the bridge and achieved remarkable social and economic benefits.

4. Initiated "rocket throwing technology for guiding cable of long-span suspension bridge", introduced rocket technology into guiding cable construction of suspension bridge for the first time, and skillfully combined military technology with bridge construction technology.

The successful research and development of this technology has filled the technical gap of cable guide construction of long-span suspension bridge in mountainous areas with complex terrain at home and abroad, and created a new method of cable guide construction of suspension bridge with technical safety, economy and reliability.

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