Basic composition of bridge

 

Bridge: an artificial structure specially built to maintain the continuity of the road when the road route encounters obstacles such as rivers, lakes, valleys, deep ditches and other lines. The bridge not only ensures the traffic operation on the bridge, but also ensures the discharge of water under the bridge, the navigation of ships or the passage of vehicles.

 

(1) . the composition of the five major components of the bridge: bridge span structure (superstructure), bearing system, pier, abutment and pier foundation.

1、 Bridge span structure (superstructure): the main bearing structure of obstacles in case of line interruption.

 

1. Function: Bear pedestrians and vehicles on the bridge.

2、 Bearing system: the force transmission device connecting the superstructure and substructure of the bridge.

 

 

1. Function: force transmission device; It not only transfers great load, but also ensures that the bridge span structure does not produce displacement.

3、 Pier: the middle supporting structure of multi span bridge is called pier.

 

 

1. Function: support the bridge span structure and transfer the bridge deck load to the foundation.

4、 Abutment: a building located at both ends of the bridge, supporting the superstructure of the bridge and connecting with the embankment.

 

 

 

1. Function: transfer the pavement load to the foundation; Connect with the embankment and resist the earth pressure of the embankment; Prevent landslide and collapse of embankment soil.

5、 Pier and abutment foundation: a structural component that transmits various actions borne by the structure to the foundation.

 

 

1. Function: support the upper bridge span structure.

(2) Composition of five small parts of the bridge: bridge deck pavement, waterproof and drainage system, railing, expansion joint and lighting.

1、 Bridge deck pavement: in order to protect the concentrated load of the bridge deck and distributed wheels, the protective layer is paved on the bridge deck with asphalt concrete, cement concrete, high polymer and other materials.

 

 

1. Function: protect the concentrated load of bridge deck and distributed wheels

2、 Waterproof and drainage system: drainage collection, transmission, water quality treatment and discharge facilities.

 

 

1. Function: collect and discharge water to the designated position to prevent waterlogging, etc.

3、 Railings: safety facilities on bridges and buildings.

 

 

1. Function: safety, separation and guidance.

4、 Expansion joint: a structural joint set along the construction joint direction of buildings or structures to prevent cracks or damage to the structure due to climate and temperature changes (thermal expansion and cold contraction).

 

 

1. Function: crack prevention.

5、 Lighting: artificial light source creates a sense of environmental atmosphere, which is infectious and expressed to people through various media.

 

 

1. Function: lighting and creating environmental atmosphere.

 

Reprinted to the headlines (the author moved the brick prodigal son)