Sidu River Bridge

Sidu River Bridge is located at the junction of Yichang and Enshi in Hubei Province. It is located at Sidu River in Yesanguan Town, Badong County, Hubei Province. It is located in the mountains of Wuling in Western Hubei Province. It is the largest span suspension bridge built in deep mountains and valleys in China. The bridge is 1365m long and consists of 1105m long bridge and 228.9m long subgrade. Among them, the main span of the bridge is 900 meters and the width of the bridge deck is 24.5 meters; the height of the cable tower in Enshi is 118.2 meters, the height of the cable tower in Yichang is 113.6 meters, the height difference between the top of the tower and the bottom of the valley is 650 meters, and the bridge deck is 560 meters from the bottom of the valley, which is equivalent to the height of 200 stories. It is the largest span suspension bridge built in deep mountains and valleys in China at present, and also the world's first super large suspension bridge in mountainous areas with a span of more than 900 meters. It is 307 meters and 290 meters higher than the world's Tallest Bridge in France. Known as the world's highest suspension bridge.

Sidu River Bridge

Siduhe bridge is a highway connecting Yichang City and Enshi City in Enshi Tujia and Miao Autonomous Prefecture of Hubei Province. It is a part of Shanghai Chongqing Expressway (National Highway G50) < / I < / I. It is also the first large suspension bridge in mountainous area in China.

The construction of Sidu River Bridge started on August 20, 2004;

The closure project was completed on October 24, 2008, and the bridge was put into operation on November 15, 2009.

Siduhe bridge starts from Yesanguan Tunnel in the west, crosses Siduhe waterway in the East and ends at Baziling tunnel in the East; the bridge deck is a two-way four lane Expressway with a design speed of 80 km / h; the total investment is 618 million yuan.

Construction process

On August 20, 2004, the construction of Sidu River Bridge started.

On July 31, 2006, Siduhe bridge completed the cable tower, foundation pile, bearing platform, tower base and other projects on both sides; on August 31, Siduhe bridge completed the main cable erection project; on October 9, Siduhe bridge successfully completed the ceremony of rocket launching pilot cable.

On February 1, 2007, Siduhe bridge completed the catwalk erection; on July 15, Siduhe bridge completed the erection of two main cables and the installation of main cables.

On September 11, 2008, Siduhe bridge steel truss beam was hoisted and closed; on October 24, Siduhe bridge was closed and the whole bridge was connected.

On November 15, 2009, Siduhe bridge was put into operation.

On March 15, 2015, Siduhe bridge was completed and accepted.

Bridge location

Siduhe bridge is located in Yesanguan Town, Badong County, Yichang Enshi Tujia and Miao Autonomous Prefecture, Hubei Province, China. The bridge area is located in the hinterland of folded mountainous area in Southwest Hubei Province. The bridge starts from Yesanguan Tunnel ramp in the west, crosses Siduhe waterway in the upper part and Baziling tunnel ramp in the East. The whole bridge section is an important part of Shanghai Chongqing Expressway.

Architectural design

building structure

Overall layout

Siduhe bridge is mainly composed of main bridge, main beam system, approach bridge, bridge towers on both sides, cable system, anchorage and its interchange ramps. The main bridge section is arranged from due west to due east.

 

　　

Design features

Design parameters

Siduhe bridge has a slope of 70 degrees to 90 degrees on both sides, and a height difference of 560 meters from valley bottom to bridge deck. The bridge is 1100 meters long, with a span of (900 + 5 × 40) meters. The main bridge is 900 meters long, the approach bridge is 5 × 40 meters long, and the net width of bridge deck is 24.5 meters. The main truss is 6.5 m high, 26.0 m wide, 6.4 m long between small sections and 12.8 m long between large sections; the transverse spacing of steel longitudinal beams is 1.95 m, the beam height is 0.66 m, the beam length is 6.36 m; the precast slab is 6.36 m long, 1.65 m wide and 0.16 m thick. Yichang bank tower is 117.6 meters high, Enshi bank tower is 122.2 meters high, the width of the tower column across the bridge is 5.6 meters, the width along the bridge is 7.6 to 10 meters, and the wall thickness of the tower column is 0.8 to 1 meter. The plane dimension of the bearing platform is 16m x 16m, the thickness is 6.0m, and the height of the tower base on the bearing platform is 3.0m. The theoretical main span of the main cable is 900m, and the theoretical vertical span ratio is 1:10; each main cable contains 127 steel wires with diameter of 5.1, totally 16129 steel wires. The ultimate strength of steel wire is 1860 MPa.

 

Equipment and facilities

lighting

The Siduhe bridge is equipped with long pole street lights, led night lights and other lighting facilities on the bridge deck and cables to facilitate traffic at night.

 

Tourism

As of October 2018, Siduhe bridge has obtained the construction license for the construction of tourism channel; the tourism channel of Siduhe bridge is located under the bridge, which is divided into tourism channel, upper and lower echelons and the landscape platform of the east bank anchor area, and is the core part of Gaoqiao Canyon Scenic Spot in Yesanguan international tourism resort phase I. The scenic spot has such projects as crossing the Sidu River Bridge in the air, extreme sports bungee jumping, high-altitude stunt performance, canyon water corridor, etc.

 

Operation

Fare system

On November 15, 2009, Siduhe bridge was put into operation. The whole bridge section will be charged according to the < I (National Highway G50) < / I charging standard of Shanghai Chongqing Expressway.

 

Construction achievements

Technical problems

The scientific and technological innovation and new technology application of Siduhe bridge mainly include the following points:

1. Systematic and scientific researches have been carried out on tunnel anchor, such as rock mass mechanical properties test, the largest domestic tunnel anchor model pull-out test, rock mass mechanical parameters and rheological parameters back analysis, three-dimensional numerical analysis of tunnel anchor surrounding rock, etc. the construction technology of tunnel anchor has been innovated, and the construction technology level of tunnel anchor has been improved.

2. The innovative scheme of "3 towing heads + 1 auxiliary pushing" is adopted in the cable saddle transportation, which solves the problem of heavy cargo transportation under the condition of steep slope and sharp bend of mountainous road.

3. It is the first time to put forward the construction technology of single replaceable cable in the anchorage prestressed anchorage system, which adopts spraying epoxy steel strand honeycomb tube bundle, develops the first domestic 37 hole large tonnage anchor plate, innovates a set of construction technology of suspension bridge anchorage prestressed anchorage system, reduces the amount of concrete, improves the service life of suspension bridge cable, saves the bridge maintenance cost during operation, and improves the social benefits The economic benefit is remarkable.

4. It is the first time to introduce the rocket technology into the construction of the pilot cable of the suspension bridge. It skillfully combines the military technology with the bridge construction technology. The successful development of this technology fills in the technical gap of the construction of the pilot cable of the long-span suspension bridge in the mountainous areas with complex terrain at home and abroad, and creates the main cable of the suspension bridge The new construction method is safe, economical and reliable.

5. This paper studies the complete set of construction technology of steel truss stiffening beam of deep valley suspension bridge, and puts forward the innovative cable crane system construction technology of deep valley suspension bridge. After lifting heavy objects, the cable can move along the whole span of mid span, the lifting point position is not limited, the erection speed is fast, and the cost is low, which improves the construction technology level of suspension bridge, and provides reference for the subsequent construction of Valley steel truss suspension bridge It provides a good reference.

 

Scientific research achievements

Honorary recognition

Value significance

Siduhe bridge is a large-scale and difficult mountain bridge project in China. With the key design and construction technology of the bridge and the completion of Siduhe bridge project, the bridge will effectively promote the technical progress of large-span bridges in mountain areas and the technical development of Expressway in mountain areas. < I (review of seminar on Key Technologies of expressways, bridges and tunnels in mountainous areas) < / I

 

As the first large-span steel truss suspension bridge in mountainous area, Siduhe bridge, in the process of breaking through the bad geological and topographical conditions, makes full use of the existing environmental conditions, is good at playing the great role of scientific and technological innovation, and has made great achievements, which has a good demonstration and leading role for the construction of similar projects. At the same time, the completion of the bridge is speeding up the local traffic, economic development, and improving people's living standards In terms of quality of life, it plays an irreplaceable role. < I (review by Chinese society of Civil Engineering)

 

Address: Sidu River, Yesanguan Town, Badong County, Enshi Tujia and Miao Autonomous Prefecture, Hubei Province

Longitude: 110.39566802979

Latitude: 30.619251251221

Chinese PinYin : Si Du He Da Qiao