Multi-storey building, which is being built JUST BELOW.
Engineers Scientific Research, Design and Technological Institute of Concrete and Reinforced Concrete was able to solve the problem to simplify installation work, reducing labor costs and shorten the duration of the construction of a building by providing a consistent gradual lifting of overlap in adjacent cells of the frame. A new method of building construction can be widely used in the construction of buildings framing systems with the rise of floors and other structures.
How do you build a multi-storey house probably know and have seen everything. First, lay the foundation, then building the first floor, then the second, etc. With each new floor rising cost of shipping materials and conduct work at height. Therefore, the idea of building a long time to find a way to soar the construction of multi-storey buildings by raising the floors.
That is, find a way to build high-rise buildings, where all the main frame of the building construction works are carried out not above the second floor. Already attempts have been made to conduct a similar construction.
For example, a method lifting floors, including a pair of loops of string to traverse with rods, hydraulic jack between them, a pair of collet on each rod, hanging designs floor to traverse through rods and gradual rise structures with the fixation of each step collets. But the difficulty of mounting large equipment on the column does not give this method a positive economic effect.
A more perfect at the moment v is a way of erecting a frame building method of lifting floors, including the installation of a cell tower on each frame cross member with traction and hydraulic jack mounted on it with collets, hanging ceiling to cases of hydraulic jacks and gradual rise of overlap by indexing relative to thrust with hydraulic jack fixing each step collets hydraulic jack to the design position of overlap, and then journalled them mounted on the columns in the level of each floor of the supporting tables.
However, the complexity of the sequential lifting of overlap in adjacent cells prestressed frame after the installation of base tables that span the column also negates all the benefits of this technology and therefore it is also not spread.
And now, the engineers of Scientific Research, Design and Technological Institute of Concrete and Reinforced Concrete was able to solve the problem to simplify installation work, reducing labor costs and shorten the duration of the construction of a building by providing a consistent gradual lifting of overlap in adjacent cells of the frame.
Their technique is as follows. In the process of construction of the building with a pre-tense frame by lifting floors, ceilings raised consistently in each cell of the first higher-level design position and the location of the holes in the column for the passage of prestressing steel, set into the holes temporary support elements and build on them overlap, then mount on the columns supporting tables, temporary support elements removed and lowered ceiling on supporting tables in the design position.
Such a sequence of operations using temporary lifting support members allows the free lift overlap in adjacent cells, followed by assembling the supporting tables covering the entire cross section of the column on four sides. Temporary support elements made in the form of plates welded to the pin, after rising to a height ceilings above the location of the holes for the passage of prestressing steel, installed after the installation of ceilings, columns are inserted into the holes on the part of the cell mounted and rely on them overlap. Then, lifting slabs is carried out in an adjacent cell in a similar way.
After lifting the slab is mounted on the supporting tables adjacent cells and lowered them overlapping.
The use of such temporary support elements simplifies installation and reduces construction time frame buildings, which is a technical achievement in improving the construction technology of recent years.
Contact information:
109428, Moscow, ul. 2nd Institutskaja, 6, NIIZhB
