Bridge Expansion Joint
| wangkiky 2175 | ||
|
Expansion joint is an important part of bridge structure，under the effect of concrete shrinkage, temperature changes,live load, the settlement of bridge pier and creep,bridge span structure will produce deformation so that make the bridge beam produce the displacement.In order to apply this kind of displacement and maintain the vehicles driving smoothly on the bridge,which must be between the ends of the bridge deck and the beam end and the abutment back wall set up between the transverse expansion joints.Once the bridge expansion joint is damaged,Will lead to jump car safety, noise,leaking and shorten the service life of the bridge.And there is relationship in the process of quality control between the quality and construction of the bridge construction joint.
The types of bridge expansion joint 1.steel Plate type expansion joint There are two forms of steel plate type expansion joint:One is the zinc iron u-shaped expansion joint,It is used for pavement,Low cost, convenient construction;Second is the lap plate expansion joints,it has a certain strength and can bear big wheel load.But the durability, driving, shock absorption is poor. 2.Packed type expansion joint This kind of expansion joint expansion amount is small,about 0 to 25 mm,the materials used are felt and asphalt,this kind of expansion joint construction process is simple,low cost,more commonly found in small span bridge.The expansion joint filler will be squeezed out under the heat condition,and at the cold extrusion of packing can't recover.And because the water proofing property is damaged due to sand sundry occupy the gap,At the same time can cause steel corrosion board.Use fixed number of year is shorter. 3.Geotextile expansion joints Geotextile expansion joints are zinc iron modified u-shaped expansion joint,with economy, the construction the advantages of simplicity and driving comfort,theoretically superior to other types of expansion joints. 4.Plate rubber expansion joint Because of the rubber material of transgender and shock absorption,its waterproof performance and reduce noise performance is better.At the same time, due to its construction technology is simple, and can meet the needs of the general bridge expansion amount,so the plate rubber expansion joint are more widely applicable scope. Related Sites: [url=http://roadroutercrack.com/blog-new/2643.html]Asphalt Pavement Pit Processing Method[/url] |
||
