Which concrete prefabricated component is more flexible and convenient?
In the process of general bridge construction, when the prestressed concrete member is applied, it adopts dual control, stress control and elongation check. The difference between the actual length and the theoretical value is only consistent with the design requirements, which is all in line with the requirements. In the prestressed concrete structure of the bridge. If the deviation is more than 6%, then take a long time to suspend the tension and identify the factors before taking measures to stretch. This is also the control of prestress in the construction process.
If the prestress has been grouted, the prestressed stress after testing does not meet the design requirements. According to the reason, the design can be chipped away, because the insufficient effective value of the prestress will cause many diseases. But if the deviation is not very large during construction, many times, the constructor will consult with the designer whether it can reduce the tension control stress of the design, for example, it was 75% to 72%. If the deviation is very large, or there is a situation, the general design party will not take the risk to do not deal with the decision.
The concrete double T plate is very flexible and convenient. At present, most of the production methods are steel die production. Several common concrete double T plate steel die production methods are as follows: tool steel die, fixed tube hot die, fixed directional circular curing steel hot die. The tool type steel die has the advantage of mobility, but it consumes a lot of steel. The short line tension ratio is longer than the long line, and the number of cranes is much more.
The amount of steel used in the fixed steel pipe is much less than that in the former. It is characterized by setting up the pipe in the cavity of the steel mold. When heated, the steam is heated indirectly in the drainage pipe. Due to the limitation of the conduction mode of heat energy, the maintenance cycle is longer. Directional circular steel die steel consumption than the above two methods are more economical, especially without adding any equipment and power consumption under the condition of using steam in the nozzle range to obtain high-speed circulation direct heating hot die steel mold, tube row steel rapid heating, short cycle, uniform maintenance. So it's a more time-saving, more economical, and more energy-efficient way of production.
The load bearing construction of precast reinforced concrete combined with precast concrete members and beams is composed of a relatively large panel and two narrow high ribs. The panel is a transverse load bearing structure, and also a pressurized area for longitudinal weighing. The production process of concrete double T plate, the prefabricated prestressed concrete double T plate often used 60-150m and long line dado pretensioning production.
