What is the difference between a viaduct and an overpass???????

Viaducts are slotted, overpasses are crosses or more complex, with multiple roads.

Would you like to give me points? Thank you.

The main differences are, different properties, different main functions, and different main features, as follows:

First, the nature is different.

1. Viaduct.

Generally refers to bridges that cross deep ravines and canyons in place of high embankments, as well as bridges that cross roads in urban bridges, supported by towers or pillars with high support.

2. Overpass.

The full name is "three-dimensional crossing bridge", which refers to the modern bridge that is layered up and down and does not disturb each other in multiple directions at the intersection of two or more intersections, including the sunken tunnel in the three-dimensional crossing project (because the bridge structure will be formed above the main body of the tunnel).

Second, the main functions are different.

1. Viaduct.

Towers or pillars with high supports, bridges that cross valleys, rivers, roads, or other low-level obstacles. After the development of the city, the traffic is congested, the buildings are dense, and the streets are difficult to widen, the use of this kind of bridge can evacuate the traffic density and improve the transportation efficiency. In addition, in the inter-city highway or railway, in order to avoid horizontal intersection with other lines, save land, and reduce subsidence of the roadbed (in some areas), this kind of bridge can also be used instead of embankment.

2. Overpass.

Avoid multi-directional vehicles intersecting at interchanges. The main function is to enable vehicles in all directions to pass quickly without being controlled by traffic lights on the intersection.

Third, the main features are different.

1. Viaduct.

The height of the pier is high, and the reinforced concrete row frame or single-column and double-column reinforced concrete piers are generally used.

2. Overpass.

The road plane is separated or intersected in three dimensions to form multiple layers.

The difference between a viaduct and an overpass: a viaduct refers to a bridge designed because it is not possible to build a bridge on the original ground due to the influence of the ground factor, and the pier height is higher. Overpass refers to the bridge designed to facilitate the rapid and safe driving of vehicles when several lines cross the road, and there are generally no piers or low piers.

The bridge is an overhead man-made channel, which is composed of three parts: the superstructure, the substructure and the foundation, the superstructure includes the bridge body and the bridge deck, the substructure includes the pier, the abutment, and the foundation is composed of an open-cut foundation.

China is a large country with many mountains and rivers, and in ancient times, both the bridge construction technology and the number of bridges were in the leading position in the world.

Before man-made bridges, due to the influence of crustal movement or other natural phenomena, many natural bridge forms were formed in Nakai, such as the stone beam bridge across the waterfall on Tiantai Mountain in Zhejiang.

1. Different definitions:

Viaduct refers to the bridge that cannot be built on the original ground due to the influence of ground factors, and the bridge is the first to be designed, and it generally appears in urban road construction. The overpass is a three-dimensional crossing, which refers to a bridge designed to facilitate vehicles to travel quickly and safely when several lines intersect.

2. Different characteristics:

The height of the viaduct piers is high, and the reinforced concrete row frame or single-column and double-column reinforced concrete piers are generally used. When wood is convenient in mountainous areas, it is also advisable to use wooden racks. Overpasses generally have no piers or have low piers.

In addition to the design requirements of urban viaducts are the same as those of general bridges, attention should be paid to the selection of the minimum building height to reduce the length of the bridge and the length of the approach road. Its contours, especially the abutments, should be designed to be light and in harmony with the surrounding environment. The location and foundation type of the pier must be matched with the layout of the underground pipeline of the city coin to reduce the demolition workload as much as possible.

There are two main forms of overpass bridges and tunnel bridges, and the cross-line overpass is to cross the existing line. It is divided into detached and interoperable. The former only ensures that the vehicles on the upper and lower lines pass independently. Tunnel bridges are cross-existing lines from underground.