The usage and selection of concrete pump

2021-12-02 16:08:28 Concrete pumps are used for concrete construction in railway and highway tunnels, bridges and culverts, hydropower, mines, high-rise buildings and national defense projects.

Concrete pump selection
At present, the selection of concrete pumps is generally based on the construction party's material diameter and construction speed, which is the so-called eating and releasing according to the amount. For the pumping construction of super high-rise buildings, high-pressure pumping or one pump to the top is generally used.
Relay pumping is to transport concrete to another concrete pump hopper placed at a certain height in advance through a concrete pump, and then deliver the concrete to the destination through the second delivery pump; this scheme is economical and relatively reliable; In other words, the requirements for pumps are not too high. At the same time, after the completion of the project, these pumps can be economically used in other general projects; the disadvantage is that the construction is cumbersome, and the first pump and the second pump must be coordinated during construction; The fixed ground of the second pump needs to be specially treated, and at the same time, it is necessary to consider whether the bearing capacity of the floor can meet the requirements. This pumping method was used a lot in the early stages of the development of early concrete pumping machinery. With the maturity of concrete pumping machinery and related technologies, this solution was gradually replaced by a pump-to-top solution.
Once the pump reaches the top, the ultra-high pressure concrete pump is used to directly transport the concrete to the destination; this scheme has the advantages of simple construction and low construction cost, but the pumping pressure of this scheme is too high, which is prone to leakage, which may lead to concrete segregation, pipe blockage, etc. Therefore, the requirements for pumping equipment, concrete pipelines and pumping construction techniques are extremely high; at the same time, after the completion of the project, the pump is not economical for other general projects.
Based on comprehensive considerations, a pump-to-top solution was selected in this case, that is, only one pump is used to pump the concrete to the destination. This solution has high requirements for pumping equipment and is representative.
The selection of ultra-high pressure concrete pump is generally based on the requirements of the working conditions, estimate the resistance of the pipeline, initially select the concrete pump model according to the calculated pressure value, and finally confirm the pumping pressure according to the construction requirements provided by the manufacturer (determines the pumping height) , The theoretical amount (determines the pumping time) whether to meet the construction needs. If the demand is met, the model is determined, and if the demand is not met, the model is reselected. Repeat this until the selected model meets the requirements.