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Attention should be paid to concrete prefabricated equipment in construction

pubdate:2018-01-05 author: click:

The transformation and upgrading of the concrete and cement products industry should not only focus on its own manufacturing industry, but also consider from the perspective of the overall situation of the country, especially from the application field or potential application field of concrete prefabricated equipment and cement products. For example, how can the marine engineering field use more large-scale concrete prefabricated components to replace the easily corroded ones? Steel structural parts can replace cast-in-situ concrete which is difficult to operate; how can prefabricated piles replace cast-in-situ piles more in the field of traffic engineering to reduce environmental pollution and waste of materials and improve the controllability of Engineering quality?

Railway, highway and bridge engineering, sleepers (track slabs) and some beams have been prefabricated, but a large number of pile foundation projects are still mainly cast-in-place piles, which seriously pollute the environment, waste materials and poor quality control. Our research shows that under the same raw material cost, the axial and horizontal bearing capacity of prefabricated piles are much higher than that of cast-in-place piles, and the quality is controllable, the environmental pollution is small, and the construction speed is fast. Therefore, "prefabrication of traffic engineering components" is an important way to promote the transformation and upgrading of concrete and cement products industry and to achieve low carbon, high efficiency and green road and bridge construction.


      


Of course, whether the opportunities brought by "housing industrialization" and "prefabrication of traffic engineering components" to the transformation and upgrading of concrete and cement products industry can be seized depends not only on technological innovation, but also on whether the redistribution of "cake" can be successful, that is, whether the original "cast-in-place" output value enjoyed by construction enterprises can be changed to the "prefabricated" output enjoyed by prefabricated enterprises. Value.

Cautions for hoisting concrete roof slabs:

1. The hoisting of concrete roof slab should be kept level by using equal length Jack rope.

2. The angle between the jack rope and the concrete roof slab should be greater than 60. In order to reduce the lifting height, the cantilever beam can be used for lifting.

3. In order to prevent the stress on the half side of the roof truss, the installation sequence of concrete roof slabs should be symmetrically carried out from the eaves on both sides to the roof one by one.

4. After the concrete roof slab is hoisted in place, it should be fixed by welding immediately.


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