Hengshui Kaixiang Rubber Products Co., Ltd.

Hengshui Kaixiang Rubber Products Co., Ltd. is the first choice of customers for bridge expansion joint devices. The bridge expansion joint devices are of reliable quality and the bridge expansion joint
devices are reasonably priced! Bridge expansion joints Bridge expansion joint devices
Design and production technical conditions for bridge expansion joint devices
The design load is designed using the automobile super load specified in the "Highway Engineering Technical Standards".
The performance requirements of steel should comply with the regulations of B/B/B/
For special-shaped steel, when the temperature is between ℃ and ℃, it should not be lower than the strength of steel. When the temperature is between ℃ and ℃
~ When the temperature is between ℃ and ℃, it should not be lower than the strength of the steel. At the same time, products with no more than two cold straightening times should be used
The strength of the remaining steel should not be lower than the strength of the steel when the temperature is between ℃ and ℃. When the temperature is between ℃ and
At ~℃, it should not be lower than the strength of steel.
Determination of the expansion amount of the bridge expansion joint device
The calculated value of the bridge expansion joint directly affects the selection of the specifications of the expansion device. If the specification of the expansion device is unreasonable, it will directly affect the use of the expansion device. At the same time, when selecting the telescopic device, the gap size of the telescopic device between the beam and plate should also be considered to ensure that the telescopic device and both ends of the beam and plate are fully anchored to achieve the best use effect. Therefore, when selecting the specifications of the telescopic device, you must leave enough margin to ensure the effectiveness and durability of the telescopic device.
After the bridge design unit selects the bridge expansion joint device, in order to facilitate processing and production, the following information should be provided
The cross-sectional view of the bridge includes the location and size of the cross-slope sidewalk safety belt railings.
The construction implementation time of the telescopic device and the temperature change range during installation.
Users should clearly indicate their special requirements.
If the user does not provide a positioning value, our company will always position the product at half the rated maximum expansion and contraction before leaving the factory.
Precautions for the installation of bridge expansion joint devices
Bridge expansion joints are an indispensable part of the bridge structure, whether on large, medium or small bridges. In the bridge structure, they must adapt to the beams
Temperature changes, shrinkage caused by concrete creep and shrinkage, joint changes caused by factors such as deflection of the rotating beam at the beam end
It directly bears the repeated load of the wheel, and it is the weakest link of the bridge, so It is the most easily damaged part, so the construction technology of bridge expansion joints must be strictly controlled. Most of the causes of damage to bridge telescopic devices are related to the anchoring system. The anchoring system is weak and is easily damaged. Repeated impacts from vehicles will lead to premature failure of the bridge expansion joints. Therefore, the anchor of the telescopic device
/> The solid system is very important.
During the installation process of bridge expansion joint devices, the following operating requirements must be strictly followed
Before construction of expansion joints, the dimensions of the reserved grooves must be checked according to the design, and the reserved grooves must be cleaned. First of all, the white paint line should be painted on the part of the bridge deck that needs to be cut to ensure that the slotted seams are neat and straight. For the deformed portions of the road surface on both sides of the expansion and contraction position of the bridge deck system, the deformed portions on both sides of the bridge deck system should be widened and cut appropriately. Width to ensure the smoothness of the joint between concrete and asphalt concrete. In addition, when cutting
pay attention to the protection of the road surface so as not to pollute or damage it. If the pre-embedded anchor bars do not meet the design requirements, they must be processed first.
Expansion joints can be installed only after meeting the design requirements.
Before installation, the bridge expansion joints should adjust the assembly positioning value according to the actual temperature and the calculation formula in the drawing design, and fix it with special clamps
. When cleaning the concrete and sandbags in the tank, pay attention to protecting the reserved steel bars in the tank to prevent lack of steel bars.
During installation, the center line of the expansion joint and the center line of the bridge should coincide with each other, and the top elevation should be consistent with the design elevation, and the cross slope and longitudinal slope should be consistent with the cross slope and longitudinal slope of the bridge deck.
After being correctly in place, then thread the horizontal connecting steel bars. It is best to weld the anchoring steel bars and embedded steel bars on the expansion joints on both sides at the same time
If there is any difficulty, first weld one side Weld firmly. After reaching the determined installation temperature, weld all the anchoring bars on the other side firmly, and
loosen the clamp to allow it to expand and contract freely.
After completing the above process, pour concrete in the reserved slot. Necessary measures should be taken when pouring concrete to vibrate and compact it.
During pouring, concrete is not allowed to be splashed into the seams and surfaces of the sealing rubber belts. If this occurs, it should be removed immediately. Carry out curing after pouring

Traffic can only be opened to traffic after the concrete strength on both sides of the bridge's expansion joints meets the design requirements.
Hengshui Kaixiang Rubber Products Co., Ltd.
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Address Hebei Province Beitian Village, Pengdu Township, Binhu New District, Hengshui