What Is a Pipe Bridge?

Pipelines bridge in the form of bridges, rivers, lakes, sea areas, railways, highways, valleys and other natural or artificial obstacles.

Pipelines bridge in the form of bridges, rivers, lakes, sea areas, railways, highways, valleys and other natural or artificial obstacles.

Chinese name

Tube bridge

Foreign name

pipeline bridge

Pipe bridge characteristics

The common feature of pipe bridges is to make full use of the carrying capacity of pipes and high-strength steel cables to increase the span. In order to adapt to different pipe diameters and natural conditions across regions, pipe bridges have various structures. The most common are suspension pipe bridges, catenary pipelines, suspension pipe bridges and cable stayed pipe bridges.

Tube bridge form

Pipe bridges usually have the following forms: laying pipelines on road bridges. When designing a road bridge, the location of the pipeline should be considered. Generally, the pipeline is placed on the side of the bridge or in a special box culvert under the bridge deck. Construct a special bridge carrying pipelines. Duoming pipes are laid on special bridge decks or protected by box culverts. Gas mixing valves and expansion joints should be installed on the pipeline. Take antifreeze measures in cold areas. Special bridges should also consider setting up sidewalks. When the pipeline itself is used as the arch or suspension bridge body, steel pipes must be used. ^[1]

Tube bridge structure

Tube bridges have a variety of structures. The most common are suspension pipe bridges, catenary pipelines, suspension pipe bridges and cable stayed pipe bridges. (1) Suspension pipe bridge is composed of main cable, tower, pipeline, boom and wind-resistant cable. The pipeline is not only a conveying pipe, but also the main component of the bridge deck system for repairing a bridge. Suspension cable

Pipe bridge (4 photos)

The lateral stiffness of the bridge is small, and wind resistant cables must be provided on both sides. (2) Catenary pipeline is directly suspended on the cross-strait towers in catenary form. The pipeline is mainly subject to tensile forces and small bending moments, which can give full play to the pipeline's carrying capacity, its span is large, and its lateral stability is also good. When the natural conditions across the site are favorable, the pulling force of the tower can also be balanced by the underground pipelines on both sides, which makes the structure simpler. (3) Suspension cable bridge is developed from suspension cable bridge and catenary pipeline. Both the main cable and the pipeline are suspended from the tower in a parabolic shape, and the pipeline is suspended below the main cable by an equal-length boom. Suspension cable bridges have good lateral stability and their spans can be large. In the 1960s, a large three-span suspension cable bridge was built on the Yangtze River near Chongqing. The diameter of the gas pipe is 219 × 8mm, the mid-span is 427.07m, and the two side spans are 333.28m and 241.91m, respectively. (4) The cable stayed cable bridge is composed of a plurality of steel cables supported by a tower, which are inclined by a pipe. Simple structure and easy construction. The pipeline is under tension, has good wind resistance, and has a large span. It is a new type of spanning structure that emerged in the 1970s, and is especially suitable for large navigable rivers. ^[2]