1.QZ Spherical bridge bearing 2.Certificate:ISO9001:2000 3.Sizes:up to the customers 4.Delivery Term:6 days 5.High quality
Almost every bridge and highway in China is using our QZ Spherical fixed steel bridge bearing.
HXZC-QZ spherical steel bearing
HXZC-QZ main technical performance spherical steel bearing
1. Bearing turning angle: vertical 0.04rad, horizontal 0.02rad.
2. Temperature range: -25 °C ~ 60 °C
3. One-way bearing and fixed bearing in non-slip direction every contact surface reserved space is 3mm, so the horizontal bearing capacity 15% of design vertical capacity.
4. Under the design vertical loads, the bearing vertical deformation is not more than 1% of the total height.
5. Plane and spherical Friction coefficient are not greater than 0.05.
6. Bearing materials used in line with GB \ T17955-2000 spherical bearings technical conditions standard.
7. Dust cover to prevent dust buildup in the exposed friction surface.
8. The exposed steel bearing surface coating expectancy of not less than 10 years.
9. At bearing installation the beam end and piers are embedded steel plate and anchor column, anchor bolt dimensions and anchor column size are shown in Table.
Features of QZ Spherical bridge bearing
QZ Spherical bridge bearing transfers force reliably and rotation performance is consistent. QZ Spherical bridge bearing has great bearing capacity, large displacement and large turning angles, so it is more suitable for wide bridge and curved bridge. No rubber is used in the QZ Spherical bridge bearing so it never happen that brittle rubber caused by low temperature affecting the bearing rotation, and QZ Spherical bridge bearing is especially suitable for cold areas.
Installation details of QZ Spherical bridge bearing:
1. QZ Spherical bridge bearing shall not be used on bridges where the concrete for the beam, pier and platform is lower than C35, unless specially approved by the designer.
2.Install QZ Spherical bridge bearing and anchor bolts: To adjust bearing level putting wedges under bearing base plate, and to make sure QZ Spherical bridge bearing base plate above the pier and platform top 20 ~ 50mm. Center the QZ Spherical bridge bearing to the right place. Filling in bolt holes and bearing bottom cushion with epoxy mortar.
3. The QZ Spherical bridge bearing shall connect with the beam, pier and platform with the embedded bolts. If necessary, welding to the embedded steel plate is allowed, but cautions shall be taken to bearing and concrete being damaged by the high heat from the steel bearing being welded.
4. When installation, the level of the QZ Spherical bridge bearing shall accord with the design, and the supporting face shall be horizontal and smooth. The difference in height of the four corners of bearing shall not exceed 2mm.
Conservation of QZ Spherical bridge bearing:
Regular inspection and maintenance shall be carried out to the QZ Spherical bridge bearing after it is put into use, usually once a year, which include:
A. Inspect whether the anchor bolt of QZ Spherical bridge bearing is broken, and whether there is any cracking or aging in the sealing rubber.
B. Check the QZ Spherical bridge bearing relative displacement whether uniform, record bearing displacement one by one.
C. Remove the garbage or dust around the QZ Spherical bridge bearing and carefully clean the surface of the stainless steel with cotton waste.
D. Loosen the anchor bolt nut once, clean and oil it to prevent rusting, and then fix it again.
E. Check at a regular point the variation in the QZ Spherical bridge bearing height to see the abrasion of the PTFE plate inside the bearing. If the variation is greater than 3mm, remove the rubber sealing ring to examine the condition of the PTFE plate.
F. Paint regularly the parts of the QZ Spherical bridge bearing against rusting except the sliding surface of stainless steel.
Vertical load of Spherical bridge bearing:
One-way movable QZ Spherical Bridge bearing (DX): horizontal force in cross-bridge direction is 10% of the capacity of reaction force.
Fixed QZ Spherical bridge bearing (GD): the horizontal force is 10% of the reaction force.
Examples for Installation of QZ Spherical steel bridge bearing:
QZ Spherical fixed steel bridge bearing
