Bridge Engineering Blog & Technical Insights

It seems to meNew Jersey Wealthy District was expelled from the United States.

In the picture below, there is a famous Ivy League school directly in front of the road wherethe dog gnawsPrinceton University, any house on both sides of the road can buy a carwith an annual property taxCRV。 When I first came here 5 years ago, it was so rottenthat it could make people vomit, and it has not been resurroofed so far.

SQ type bridge expansion joint highway bridge expansion joint device adopts integral hot rolling16Mn profiled steelThe comprehensive technical performance and technical indicators of the expansion joint device of highway bridge have reached or exceeded the advanced level of similar products in the world. 

01expansion jointsSetting and function

The expansion joints of highway bridges are usually set in two positionsLiang Duanbetween the beam end and the abutment, or the hinge of the bridgeThe important function of this facility is to ensure the stable connection of the structure by adjusting the displacement of the superstructure caused by the vehicle load and the bridge building materials. However, once the telescopic device of a diagonal bridge is damaged, it will not only seriously affect the speed, comfort and safety of the vehicle, but may even cause serious traffic accidents, so its installation and maintenance are crucial.

The normal service life of expansion joints of highway bridges is usually related to the type, material and use environment:

Modular expansion joints(common in long-span bridges): generally 8-15 years, if frequently subjected to heavy traffic, the life may be shortened to 5-8 years;

Bridge expansion joint refers to the telescopic device set between the two beam ends, between the beam end and the abutment, or at the hinged position of the bridge in order to meet the requirements of bridge deck deformation.Telescopic deviceOn the one hand, it protects the main structure of the bridge from damage, and on the other hand, it ensures the safety and comfort of the vehicle.