Manufacturing method of laminated slab for building and prefabricated laminated slab concrete blockTechnical Field
The invention belongs to the field of buildings, and particularly relates to a manufacturing method of a laminated slab for a building and a prefabricated laminated slab concrete block.
Background
At present, the market of multi-story high-rise buildings in China is huge, most of construction methods are cast-in-situ reinforced concrete structures, the construction of floors is also a cast-in-situ reinforced concrete method, building templates are firstly built, reinforcing steel bar cushion blocks are placed on the building templates, and reinforcing steel bars are paved on the reinforcing steel bar cushion blocks. The rebar also needs to be tied and secured in place. And finally, casting concrete, and curing and molding. After casting is completed, the building templates need to be removed. The construction method not only wastes a large number of building templates and a large number of reinforcing steel bar cushion blocks, but also consumes a large number of manual binding reinforcing steel bars, and is difficult to construct.
Disclosure of Invention
The invention aims to provide a manufacturing method of a laminated slab for a building and a prefabricated laminated slab concrete block, which are simple and convenient to construct.
The object of the invention is achieved in the following way: the manufacturing method of the laminated slab for the building comprises the following steps: (1) prefabricating laminated slab concrete blocks; the precast laminated slab concrete block comprises a concrete bottom plate, wherein the concrete bottom plate is provided with reinforcing steel bar grooves which are used for placing reinforcing steel bars and are arranged in a longitudinal and transverse cross manner, and two ends of each reinforcing steel bar groove extend to the edge of the concrete bottom plate; (2) Combining precast laminated concrete blocks one by one into a whole template; (3) Paving the steel bars in the steel bar grooves of the precast laminated concrete blocks; and (4) casting concrete to the elevation position to form the laminated slab.
Step (3), after the steel bars are paved in the steel bar grooves, placing the hollow internal mold with the hollow inside and the closed outside on the precast laminated slab concrete blocks; (4) Casting concrete to the elevation position to form the hollow laminated slab.
The hollow internal mold comprises a cylindrical internal mold, two ends of the cylindrical internal mold are respectively provided with a supporting block, and the supporting blocks and the cylindrical internal mold form a hollow structure; the prefabricated laminated slab concrete block is characterized in that the four edges of the prefabricated laminated slab concrete block are provided with bumps, the bottom of the supporting block is provided with grooves matched with the bumps, and the bumps are connected with the supporting block through the bumps and the grooves.
The edge of the concrete bottom plate is provided with a mortise-tenon structure, and prefabricated laminated slab concrete blocks are combined into a whole template through the mortise-tenon structure.
Vertical short steel bars are arranged on the precast laminated slab concrete blocks, and are combined with cast-in-place concrete after casting.
The short steel bars are arranged at the intersections of the longitudinal steel bar grooves and the vertical steel bar grooves,
The utility model provides a prefabricated superimposed sheet concrete block, includes concrete bottom plate, sets up the longitudinal, the transverse cross steel bar groove of arranging that is used for placing the reinforcing bar on the concrete bottom plate, and the steel bar groove both ends extend to the concrete bottom plate edge.
The edge of the concrete bottom plate is provided with a mortise and tenon structure which is connected and self-locked with other precast laminated slab concrete blocks.
The prefabricated laminated slab concrete block is provided with a convex block on the peripheral edge, the convex block is provided with a support block which is connected with the convex block in a matched way through a bottom groove, and a cylindrical internal mold is arranged between two support blocks at corresponding positions on two opposite sides of the prefabricated laminated slab concrete block; the supporting building blocks and the cylindrical internal mold form a hollow structure.
And the intersection of the longitudinal steel bar groove and the vertical steel bar groove on the precast laminated concrete block is provided with a vertical short steel bar which is combined with cast-in-place concrete after casting.
The beneficial effects of the invention are as follows: the invention changes the construction method of the existing building floor. The prefabricated laminated slab concrete block with the vertically and horizontally distributed steel bar grooves is used, and binding steel bars are not needed. After casting is completed, the precast composite slab concrete segments are called a portion of the floor slab and need not be removed. The technology ensures the safety and reliability of the floor slab, saves building templates and concrete cushion blocks in the construction process of the floor slab, cancels the steel bar binding link in the construction link, simplifies the construction process, ensures that the construction is simple and easy, saves the building cost and improves the working efficiency. And arranging a hollow internal mold on the precast laminated slab concrete block and casting to manufacture the hollow laminated slab.
Drawings
Fig. 1 is a top view of a precast composite slab concrete block.
Fig. 2 is a view in the A-A direction of fig. 1.
Fig. 3 is a B-B view of fig. 1.
Fig. 4 is a perspective view of a precast laminated concrete segment (another embodiment).
Fig. 5 is a schematic view of a combination of a plurality of precast composite slab concrete segments.
Fig. 6 is a schematic view of the laid rebar of fig. 5.
Fig. 7 is a front view of the hollow inner mold. Fig. 8 is a side view of fig. 7.
Fig. 9 is a perspective view of the hollow inner mold.
Fig. 10 is a schematic view of the laying of the hollow inner mold and the floor slab negative tendons of fig. 6 (hidden precast composite slab concrete blocks).
Fig. 11 is a schematic view of a hollow internal mold (hidden reinforcement) for laying precast composite slab concrete blocks.
Fig. 12 is a view in the C-C direction of fig. 11.
Wherein 1 is a prefabricated laminated slab concrete block, 2 is a concrete bottom plate, 3 is a reinforcing steel bar groove, 4 is a mortise and tenon structure, 5 is a reinforcing steel bar, 6 is a cylindrical internal mold, 7 is a supporting block, 8 is a bump, 9 is a short reinforcing steel bar, and 10 is a negative reinforcing steel bar.
Detailed Description
As shown in fig. 1 to 10, the method for manufacturing the laminated slab for construction comprises the steps of: (1) prefabricating a superimposed sheet concrete block 1; the precast laminated slab concrete block 1 comprises a concrete bottom plate 2, wherein a longitudinal and transverse crossed steel bar groove 3 for placing steel bars is formed in the concrete bottom plate 2, and two ends of the steel bar groove 3 extend to the edge of the concrete bottom plate 2; (2) Combining the precast laminated concrete blocks 1 one by one into a whole template; (3) Paving the steel bars 5 in the steel bar grooves 3 of the precast laminated concrete blocks 1; and (4) casting concrete to the elevation position to form the laminated slab. The precast laminated concrete segments 1 include generally standard segments and non-standard segments of various planar dimensions. The concrete bottom plate 2 is a cuboid, and four sides are provided with tenons. The four sides of the whole template are wall surfaces or beams. The rebar grooves 3 are preferably evenly distributed. The precast laminated slab concrete block 1 with the vertically and horizontally distributed reinforcing steel bar grooves 3 is used, and binding of reinforcing steel bars is not required. After casting, the precast laminated concrete segments 1 become part of the floor slab and do not need to be dismantled. The technology ensures the safety and reliability of the floor slab, saves building templates and concrete cushion blocks in the construction process of the floor slab, cancels the steel bar binding link in the construction link, simplifies the construction process, ensures that the construction is simple and easy, saves the building cost and improves the working efficiency.
The edge of the concrete bottom plate 2 can be provided with a mortise and tenon structure 4, and adjacent precast laminated slab concrete blocks 1 are combined together through the mortise and tenon structure 4, and other combination methods can be adopted.
Step (3), after the steel bars 5 are paved in the steel bar grooves 3, placing a hollow internal mold with a hollow inside and a closed outside on the precast laminated slab concrete block 1; (4) Casting concrete to an elevation location is referred to as hollow superimposed sheet. At this time, the interior of the laminated slab has a hollow region, which is also called a laminated hollow slab.
The hollow internal mold comprises a cylindrical internal mold 6, support blocks 7 are respectively arranged at two ends of the cylindrical internal mold 6, and the support blocks 7 and the cylindrical internal mold 6 form a hollow structure. The prefabricated laminated slab concrete block 1 is provided with a bump 8 on the four edges, the bottom of the supporting block 7 is provided with a groove matched with the bump 8, and the bump 8 and the supporting block 7 are connected through the bump 8 and the groove. The height of the four edges of the precast laminated concrete block 1 can be the same as that of the reinforced groove 3. The tubular inner die 6 may be a hollow tubular object, such as a PVC pipe, with both ends open. The two ends of the supporting building block 7 are provided with blind holes matched with the two ends of the tubular object. The cylindrical inner mold 6 may be a circular or oval or other tubular shape as long as the casting requirement is satisfied. The hollow inner mold can also have other structures, so long as the hollow requirement is met.
The precast laminated concrete block 1 can be provided with vertical short steel bars 9, and the short steel bars 9 are combined with cast-in-place concrete after casting. Preferably, the short reinforcing bars 9 are provided at the intersections of the longitudinal reinforcing bar grooves and the vertical reinforcing bar grooves 3. Thus, the laminated plate has good mechanical properties. The place where the short reinforcing bars 9 interfere with the position of the cylindrical inner mold 6 is avoided according to circumstances, for example, the short reinforcing bars 9 are not provided at the interference position.
And a negative rib 10 for constructing the steel bars and the floor slab is arranged above the cylindrical internal mold 6 or the precast laminated slab concrete block 1. The negative reinforcement 10 and the short reinforcement 9 are not connected, and are specifically determined according to different situations.
The utility model provides a prefabricated superimposed sheet concrete block 1, includes concrete bottom plate 2, sets up on the concrete bottom plate 2 to be used for placing the reinforcing bar groove 3 of vertical, the horizontal cross arrangement of reinforcing bar 5, and reinforcing bar groove 3 both ends extend to concrete bottom plate 2 edge.
The edge of the concrete bottom plate 2 can be provided with a mortise and tenon structure 4 which is connected and self-locked with other precast laminated concrete blocks 1.
The precast concrete base plate 2 is provided with a hollow internal mold with a hollow inside and a closed outside for forming a hollow area after casting.
The four peripheral edges of the precast laminated concrete block 1 are provided with convex blocks 8, the convex blocks 8 are provided with supporting blocks 7 which are connected with the convex blocks 8 in a matched manner through bottom grooves, and a cylindrical inner mold 6 is arranged between the two supporting blocks 7 at the corresponding positions of the two opposite sides of the precast laminated concrete block 1; the supporting building block 7 and the cylindrical internal mold 6 form a hollow structure. The tubular inner mold 6 may be a hollow tubular member having both ends open.
The intersection of the longitudinal steel bar groove 3 and the vertical steel bar groove 3 on the precast laminated concrete block 1 is provided with a vertical short steel bar 9 which is combined with cast-in-place concrete after casting.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
Although a number of embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.