Bridge precompressed water bag is an auxiliary tool used in bridge construction. is mainly used to simulate the actual stress distribution of bridge under load.
Through the use of pre-pressed water bag, can test the stability and safety of bridge structure, to ensure the quality and safety of construction.
The purpose of the bridge precompressed water bag is to eliminate the inelastic deformation of the bridge structure to improve the bearing capacity and service life of the bridge.
This kind of device has been widely used in the bridge construction of railway and highway. has the advantages of high efficiency, low dynamic intensity, civilized site, clean and so on.
According to the size of the box girder structure, according to the requirements of the design drawings, the cast-in-place support formwork system is preloaded. is a technical means that provides a new method for load preloading.
The process of using the bridge prepressure water bag includes:
1. Place the pre-pressurized water bag at the position where pre-pressurized water bag needs to be spread out, outlet valve is at the low end of the pre-pressurized water bag, valve is downward, is exposed to the bottom template, switch off.
2. Use the high-pressure water pump, connect the water pipe to the inlet pipe valve, turn on the switch and the exhaust switch, and discharge the air in the bag. Begin to fill with water. When the water is full, close the valve.
3. Within the required pre-loading time (3-7 days) template does not sink, can open the water outlet valve and release water.
4. After use, fold up the water bag and put it indoors, ready for next use.
In addition, bridge precompressed water bag construction technology has the characteristics of simple, convenient, efficient, is widely used in bridge construction, to ensure the quality and safety of bridge engineering
The material of bridge precompressed water bag is mainly polymer material, including high strength polyethylene (HDPE) and PVC.
These materials have the following characteristics:
High strength polyethylene (HDPE) : HDPE material has excellent corrosion resistance, wear resistance and UV resistance, can ensure the service life of water bag. At the same time, the quality of HDPE material is light, easy to transport and install.
PVC: PVC material prepressure water bag wear-resistant and folding, durable, has the characteristics of high strength, light weight, film quality, long service life, tasteless, color according to demand and so on.
In addition, the production of bridge precompressed water bag also involves advanced production technology, to ensure the dimensional accuracy and uniform thickness of the water bag.
The selection of this material and the production process ensure the high efficiency, environmental protection, practicability in bridge construction, brings convenience and safety to bridge construction.
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