CN114687459A - Assembly type composite wallboard and floor slab self-tapping nail cluster and post-cast strip combined connecting structure and manufacturing method - Google Patents

Abstract

The invention discloses a combined connection structure and method of prefabricated composite wall panels and floor self-tapping screw aggregate blocks and post-casting belts, which are used for the assembly of upper and lower composite wall panels and floor slabs in multi-storey buildings that are subjected to relatively large earthquakes. The self-tapping screw block includes a one-shaped self-tapping screw block connecting the outer leaf concrete sheets of the upper and lower composite walls, and a T-shaped self-tapping screw block connecting the lower inner leaf concrete sheet with the inverted L-shaped ring beam and the upper inner leaf concrete sheet and floor slab. And the inverted L-shaped self-tapping screw block connected to the floor, the self-tapping screw block steel structure is composed of force transmission steel plates, connecting steel plates and self-tapping screws welded on the steel bars; the post-casting strip includes the upper and lower outer leaf concrete slabs. The post-cast strip and the post-cast strip between the inner leaf concrete slab and the floor slab; the self-tapping screw block connection solves the problem that the interface between the concrete sheet and the sandwich polystyrene board is the connection construction blind area and the through-screw connection thermal bridge. The invention has the technical advantages of the continuous force transmission of the post-casting belt and the concentrated force transmission of the self-tapping screw block to work together efficiently to bear the force and to have good thermal performance of the wall.

Description

The combined connection structure and method of prefabricated composite wall panel and floor self-tapping nail block and post-casting belt

technical field

The invention relates to a combined connection structure and method of an assembled composite wall panel and a floor panel self-tapping screw block and a post-casting belt, and belongs to the technical field of prefabricated concrete buildings.

Background technique

The technical research and development of ultra-low energy consumption houses has always been paid close attention to by the engineering community at home and abroad. However, at present, the construction technology of low-storey and ultra-low energy consumption houses in villages and towns, especially the prefabricated construction technology, is very lacking.

Technical bottleneck:

The connection problems of the upper and lower composite walls: (1) The traditional shear wall reinforcement structure has a large distribution spacing and a large diameter of the steel bar. If the steel bar is lapped and anchored, the height and size of the post-cast belt section will be large and the amount of cast-in-place is large, which is difficult to meet the requirements of internal and external The height of the post-cast concrete section required for the assembly of the leaf single-row reinforced mesh concrete thin-panel sandwich polystyrene panel wall panel should not be greater than the requirement of 180mm; (2) The traditional shear wall sleeve connecting steel bar technology is not suitable for the inner and outer leaf single-row steel bar at all. For the assembly of mesh concrete thin-slab sandwich polystyrene wall panels, the thickness of the inner and outer leaf thin wall panels is only 40mm to 60mm; (3) the traditional shear wall steel plate bolt connection technology is not suitable for the inner and outer leaf single-row reinforced mesh concrete thin plate clamps The assembly of the core polystyrene wall panels, because the inner and outer leaf wall panels are sandwiched between the polystyrene panels and considering the thermal bridge problem, the polystyrene panels are not allowed to punch through bolts, so it is difficult to use the traditional steel plate bolt connection technology to separate the inner and outer leaf concrete thin walls. (4) The price of self-tapping screws is much lower than that of bolts. The connection between the thin-walled light-gauge steel keels of the thin-walled light-gauge steel keel structure is connected by self-tapping screws, and the self-tapping screws successively penetrate the two connected Light steel keel, the force transmission between the light steel keel is realized by the engagement with the self-tapping screw, and there is no extrusion friction; however, the assembly of the inner and outer leaves of the single-row reinforced mesh concrete sheet sandwich polystyrene panel wall panel belongs to the reinforced concrete wall Panel assembly requires both friction and occlusal force. It is obvious that the current technology of directly connecting light steel keels with self-tapping screws is significantly different from the assembly of inner and outer leaf concrete thin wall panels of composite wall panels and their force transmission requirements; (5) Traditional shears Force wall cast-in-situ belt assembly, due to the large amount of concrete cast-in-place and the large expansion force of concrete, it is necessary to add temporary construction brackets to locate the formwork, which is expensive and less flexible, and is not suitable for single-row reinforced mesh concrete with inner and outer leaves. Concrete post-pour construction of thin-sandwich polystyrene wall panels.

The connection between the composite wall and the floor: (1) The inner leaf of the traditional prefabricated sandwich polystyrene composite wall panel has a single row of reinforced mesh concrete sheets. There is a problem of thin plate stability when the thin plate transmits the floor load; (2) the traditional prefabricated concrete shear wall structure mostly adopts the reinforced truss floor slab with the post-cast layer, and the cast-in-place amount is relatively large; (3) the thickness of the inner leaf of the composite wall plate is only It is 40mm～60mm, and the construction method of using the pre-embedded shear bolts of the wall panel to connect with the floor slab is not applicable; (4) In order to ensure the connection performance between the floor slab and the inner leaf of the composite wall panel at the lap joint of the support, most of the composite wall panels are used inside and outside. The structure of the leaf concrete sheet connected to the ring beam has serious thermal bridge problems, which is not suitable for low-energy-consumption houses.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a combined connection structure and method of an assembled composite wallboard and a floor self-tapping screw block and a post-casting belt, with fast construction speed and less wet work.

In order to solve the above-mentioned technical problems, the technical scheme adopted by the present invention is:

A composite connection structure of assembled composite wall panel and floor self-tapping nail block and post-casting belt, including upper composite wall panel, lower composite wall panel, concrete floor, inverted L-shaped ring beam, upper and lower composite wall panel outer leaf concrete sheets The built-in steel structure of the self-tapping nail block, the inverted L-shaped ring beam of the lower inner leaf concrete sheet, the T-shaped self-tapping nail block connected with the upper inner leaf concrete sheet and the floor slab, the built-in steel structure, the lower inner leaf concrete thin wall panel Built-in steel structure connected with self-tapping screw block between floors;

The upper composite wall panel and the lower composite wall panel both include concrete outer leaf panels, concrete inner leaf panels, and sandwich insulation panels. The inner leaf reinforcement mesh is poured into concrete to form the concrete inner leaf slab, and the outer leaf reinforcement mesh is poured into concrete to form concrete. The outer leaf plate, the tie steel bars are welded or tied to connect the inner leaf steel mesh, the outer leaf steel mesh and the sandwich insulation board together; the concrete floor is made of concrete poured from the floor steel mesh;

An inverted L-shaped ring beam is provided at the junction of the upper composite wall panel and the lower composite wall panel. The vertical reinforcing bars of the net 7 and the inner leaf reinforcing mesh at the lower part of the rectangular ring beam are formed, and the inverted L-shaped ring beam is formed by the rectangular concrete ring beam and the inner leaf concrete slab under the rectangular ring beam;

The built-in steel structure of the outer leaf concrete thin plate self-tapping nail aggregate block of the upper and lower composite wall panels includes the upper force plate of the outer leaf and the lower force transmission plate of the outer leaf, the upper force plate of the outer leaf and the lower force transmission plate of the outer leaf. The upper and lower outer leaf reinforcement meshes are respectively welded and connected, so that the self-tapping nails and self-tapping wooden blocks are bonded to the back of the upper power plate of the outer leaf and the lower power transmission plate of the outer leaf. The lower force transmission plate of the outer leaf is connected by a self-tapping screw through the connecting steel plate of the outer leaf;

The inner steel structure of the T-shaped self-tapping nail aggregate block connected with the lower inner leaf concrete sheet inverted L-shaped ring beam and the upper inner leaf concrete sheet and the floor slab includes a T-shaped steel plate, and the outer longitudinal side of the lower inner leaf concrete sheet inverted L-shaped ring beam is longitudinal. A T-shaped force-transmission steel plate with self-tapping screw holes that doubles as a force-transmission steel plate and a connecting steel plate is welded on the rib. The upper flange of the T-shaped force-transmission steel plate is connected with the inner-leaf force-transmission steel plate on the upper inner-leaf concrete sheet with self-tapping screws. , the horizontal web and the floor power transmission steel plate are connected with self-tapping screws;

The built-in steel structure connected by the self-tapping nail block between the lower inner leaf concrete thin wall slab and the floor slab includes the inverted L-shaped power transmission steel plate, the rectangular ring beam of the inverted L-shaped ring beam, and the inner longitudinal reinforcement of the inverted L-shaped power transmission steel plate welded to the reinforcement cage. , the inverted L-shaped power transmission steel plate and the one-shaped floor power transmission steel plate are connected with self-tapping screws;

Preferably, the inner-leaf steel mesh and the outer-leaf steel mesh are single-row steel meshes, both of which are formed by binding or welding of horizontally distributed steel bars and vertically distributed steel bars; The blades are all poured with coarse aggregate and fine stone concrete with a particle size of 5mm to 10mm.

Preferably, at the junctions of the outer leaf reinforcement meshes of the upper composite wallboard and the lower composite wallboard, the outer leaf upper force plate and the outer leaf lower force transmission plate are respectively welded, and the outer leaf connecting steel plate is embedded in the wall plate. After the outer leaf connecting plate is grooved, use self-tapping screws to connect the outer leaf connecting steel plate to the outer leaf upper power plate and the outer leaf lower power transmission plate.

Preferably, the vertically distributed reinforcing bars of the inner leaf reinforcing meshes pass upwards through the ring beam reinforcing cage, and the passing height is equal to the height of the post-cast concrete strip.

Preferably, the vertical steel plate of the inverted L-shaped power transmission steel plate is welded with the outer longitudinal reinforcement of the ring beam reinforcement cage, and the horizontal steel plate of the inverted L-shaped power transmission steel plate and the floor power transmission steel plate welded on the floor reinforcement mesh are made of self-made Tapping screw connection.

Preferably, after the upper and lower composite wall panels are assembled, there are post-casting strips on the outer leaves of the wall panel and the inverted L-shaped ring beams that connect the upper and lower inner leaf concrete sheets and the floor slabs in the overlapping area of the upper and lower outer leaf concrete slabs. Bands.

Preferably, the thermal insulation board is made of extruded polystyrene board, polystyrene foam board or phenolic foam composite board.

A method for the combined connection structure of a prefabricated composite wall panel and a floor panel self-tapping nail block and a post-casting belt, comprising the following steps:

The first step: prefabricated composite wall panels with one-shaped force-transmitting steel plates on the upper inner and outer leaves, prefabricated lower outer leaves with one-shaped force-transmitting steel plates, and inner leaves with inverted L-shaped ring beams and T-shaped connecting steel plates and inverted L-shaped connecting steel plates composite wall panels, prefabricated reinforced concrete floor slabs;

Step 2: Lap the steel bar at the end of the steel bar on the inverted L-shaped ring beam of the composite wall panel and set a cement block of not less than 10mm. Connect the horizontal flange of the T-shaped connecting steel plate and the horizontal steel plate of the inverted L-shaped connecting steel plate to the floor power transmission steel plate respectively;

The third step: install the composite wallboard, apply glass glue to the end piers of the composite wallboard on the contact surface of the upper and lower composite wallboards, and then place the upper composite wallboard on the lower composite wallboard, using self-tapping screws After freely passing through the hole on the T-shaped connecting steel plate, it is connected with the connecting steel plate of the outer leaf concrete slab of the upper and lower composite wall panels by self-tapping. The connecting steel plate connection of the inner leaf concrete slab of the slab;

Step 4: Use high-performance mortar to smooth the groove where the composite wallboard self-tapping screw connects the steel plate;

The fifth step: pour the post-cast strips of the outer leaf concrete slabs of the upper and lower composite wall panels with fine stone concrete, and the post-cast strips connecting the inner leaf concrete slabs with the floor concrete;

Step 6: Paint the waterproof paint.

The beneficial effects produced by the above technical solutions are:

(1) The self-tapping nail block of the upper and lower composite wall panels solves the following technical problems: 1) The problem of the integrated connection of the inner and outer leaf concrete thin wall panels of the composite wall panels with fine and dense steel mesh; 2) The assembly process of the upper and lower composite wall panels needs to leave The problem of temporary buttresses with the height of post-cast strips; 3) The steel plate bolts connect the concrete thin wall panels, and the existing interface between the concrete thin plate and the sandwich polystyrene panel is a blind area for the connection construction; 4) The composite wall panels are connected by steel plates and screws through penetration The existing thermal bridge problem is suitable for the thermal performance requirements of ultra-low energy consumption houses.

(2) Wall panel and floor self-tapping nail aggregates solve the following technical problems: 1) The inner leaf of the prefabricated lower composite wall panel is provided with an inverted L-shaped ring beam, and at the same time, it solves the lap length requirement of the floor anchoring steel bars and strengthens the surrounding constraints of the floor. technical difficulties. 2) There is a polystyrene plate isolation between the inverted L-shaped ring beam and the outer leaf concrete slab, which overcomes the drawbacks of serious thermal bridges in the overall ring beam. 3) The overall prefabricated floor slab is adopted, which greatly reduces the amount of wet work and improves the assembly efficiency. 4) The upper and lower composite wallboard sandwich insulation boards are continuous at the post-cast strip, and the post-cast strip is poured with fine stone concrete to avoid problems such as thermal bridges and water leakage.

(3) The combined connection structure has the advantages of self-tapping screw block connection and post-cast strip connection, which not only solves the problem of temporary buttresses that require post-cast strip height during the assembly process of the upper and lower composite wall panels during the construction stage, At the same time, it solves the problem that the continuous force transmission of the post-casting belt and the concentrated force transmission of the self-tapping screw block work together efficiently and forcefully in the use stage.

Description of drawings

Figure 1 is a schematic diagram of a building plan;

Figure 2 is a sectional view of the self-tapping screw block buttress at the wall-slab connection node;

Figure 3 is a sectional view of the post-casting strip at the wall-slab connection node;

Fig. 4 is a three-dimensional schematic diagram of the connection structure of the assembled composite wall panel and the floor self-tapping nail block;

FIG. 5 is a perspective view of the combined connection structure of the assembled composite wall panel and the post-casting belt;

Fig. 6 is a three-dimensional schematic diagram of a steel structure with built-in steel structure in a composite wall panel and a floor self-tapping screw block;

7 is a three-dimensional schematic diagram of a built-in steel structure in a combined connection structure of an assembled composite wall panel and a post-casting belt;

In the figure: 1. Upper composite wallboard; 2. Lower composite wallboard; 3. Concrete outer leaf plate; 4. Concrete inner leaf plate; 5. Insulation board; 6. Outer leaf reinforcement mesh; 8. Knotted steel bar; 9. Upper force plate on outer leaf; 10. Lower force transmission plate on outer leaf; 11. Connecting steel plate on outer leaf; 12. Self-tapping screw; ; 15. Inverted L-shaped ring beam; 16. T-shaped force-transmitting steel plate; 17. Inner leaf force-transmitting steel plate; 18. Welding seam between inner-leaf force-transmitting steel plate and inner-leaf steel mesh; 19. Floor power transmission steel plate; 20. Floor steel mesh; 21. Concrete floor slab; 22. Groove of connecting plate of outer leaf of wall panel; 23. Groove of inner leaf of wall panel; 24. Groove of connecting plate of floor slab; 25. Inverted L-shaped force-transmitting steel plate; strip; 27. The post-cast strip connecting the upper and lower inner leaf concrete sheets and the floor slab on the inverted L-shaped ring beam.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

As shown in Figure 1-7, the self-tapping screw block includes a one-shaped self-tapping screw block structure connecting the upper and lower composite wall outer leaf concrete sheets, the lower inner leaf concrete sheet inverted L-shaped ring beam and the upper inner leaf concrete sheet and floor slab The connected T-shaped self-tapping screw aggregate block structure, and the inverted L-shaped self-tapping nail aggregate block structure connected with the lower inner leaf concrete sheet inverted L-shaped ring beam and the floor slab.

(1) One-shaped self-tapping screw block structure connecting the outer leaf concrete sheets of the upper and lower composite walls: it is a single row of reinforced mesh concrete sheets on the outer leaf of the upper and lower composite wall panels with force-transmitting steel plates. A steel-concrete thin-wall panel block with the thickness of the outer profile concrete thin-plate connecting the upper and lower force-transmitting steel plates connected by the steel plate is a steel-concrete composite thin-wall panel block. The formation of the one-shaped self-tapping screw block structure connecting the outer leaf concrete thin plates of the upper and lower composite walls: the upper and lower force transmission steel plates are welded on the steel mesh in the middle of the outer leaf concrete thin wall plates of the prefabricated upper and lower composite wall panels. The connecting steel plates with self-tapping screw holes are embedded in the grooves and are closely attached to the upper and lower force transmission steel plates, and the self-tapping screws are used to freely pass through the connecting steel plate holes and then self-tapping to connect the upper and lower force transmission steel plates. The mortar is smoothed to form a built-in steel-structured concrete thin-wall panel with the thickness of the outer concrete thin plate in the upper and lower force-transmitting steel plate areas.

(2) The T-shaped self-tapping screw block structure connecting the lower inner leaf concrete sheet with the inverted L-shaped ring beam and the upper inner leaf concrete sheet and the floor slab: it is a combination of welding on the longitudinal reinforcement of the lower inner leaf concrete sheet inverted L-shaped ring beam Power transmission steel plate and T-shaped steel plate with self-tapping screw holes for connecting steel plates, its upper flange is connected with self-tapping nails of one-shaped force-transmitting steel plate on the concrete sheet of the upper inner leaf, and its horizontal web and floor slab are one-shaped force-transmitting steel plate Self-tapping nails are connected to form a built-in steel-concrete T-shaped block with a surrounding T-shaped steel structure of 40mm, which is a steel-concrete composite block. The formation of the T-shaped self-tapping nail aggregate block structure connecting the lower inner leaf concrete sheet with the inverted L-shaped ring beam and the upper inner leaf concrete sheet and the floor slab: the lower inner leaf concrete sheet of the prefabricated composite wall panel has an inverted L-shaped ring beam, T-shaped steel plates with self-tapping nail holes that double as force-transmitting steel plates and connecting steel plates are welded on the outer longitudinal bars, assembled floor slabs and upper composite wall panels, and the upper flanges of T-shaped steel plates and the upper inner leaf concrete sheet are one-shaped force transmission. The steel plate is connected by self-tapping screws, the horizontal web of the T-shaped steel plate is connected with the floor-shaped force-transmitting steel plate by self-tapping screws, and the groove embedded in the T-shaped steel plate is smoothed with mortar to form a T-shaped steel structure with a 40mm peripheral outline. shaped block.

(3) The inverted L-shaped self-tapping screw block structure connecting the inverted L-shaped ring beam of the lower inner leaf concrete sheet with the floor slab: it is a force-transmitting steel plate welded on the longitudinal reinforcement of the inverted L-shaped ring beam of the lower inner leaf concrete sheet and the connection The steel plate is an inverted L-shaped steel plate with self-tapping screw holes, and its horizontal plate is connected to the floor-shaped force-transmitting steel plate self-tapping nails, forming a built-in inverted L-shaped steel structure with a peripheral outline of 40mm. block, which is a steel-concrete composite block. The formation of the inverted L-shaped self-tapping screw block structure connecting the lower inner leaf concrete sheet with the inverted L-shaped ring beam and the floor slab: the lower inner leaf concrete sheet of the prefabricated composite wall panel has an inverted L-shaped ring beam, and its outer longitudinal bars are on Weld the inverted L-shaped steel plate with self-tapping screw holes that doubles as the force-transmitting steel plate and the connecting steel plate, and assemble the floor. Smooth it with mortar to form an inverted L-shaped block with a 40mm peripheral outline of the inner inverted L-shaped steel structure.

The post-cast strips include post-cast strips between the upper and lower outer leaf concrete slabs and post-cast strips between the inner leaf concrete slabs and the floor slab.

(1) Post-casting strip between the upper and lower outer leaf concrete slabs, which is the thin concrete formed after the steel bars reserved between the upper and lower composite wall panels and the outer leaf concrete thin wall slabs are overlapped in the post-cast strip area and poured with fine stone concrete Wall panel strips.

(2) The post-casting strip between the inner leaf concrete slab and the floor slab, which is the vertical distribution of steel bars on the thin wall slab above the inverted L-shaped ring beam of the lower inner leaf concrete slab, the lap joint steel bars of the floor, and the upper inner leaf concrete thin wall slab Concrete strip formed after pouring fine stone concrete in the overlapping area of vertically distributed steel bars.

The combined connection structure refers to the one-shaped self-tapping nail block structure connecting the outer leaf concrete sheets of the upper and lower composite walls, and the T-shaped self-tapping nail set connecting the lower inner leaf concrete sheet with the inverted L-shaped ring beam and the upper inner leaf concrete sheet and floor slab. The block structure, the inverted L-shaped self-tapping screw block structure connecting the lower inner leaf concrete sheet inverted L-shaped ring beam and the floor slab, and the post-cast concrete strip concrete node connection structure, constitute a combination of synergistic stress structures.

The connection relationship of each part in the connection structure is as follows:

The structure of the upper composite wall panel 1 and the lower composite wall panel 2: the inner leaf reinforcement mesh 7, the outer leaf reinforcement mesh 6 and the tie reinforcement 8 are connected by welding or binding to form the reinforcement mesh of the composite wall panel, and the concrete outer leaf panel 3 , Concrete inner leaf plate 4, sandwich insulation board 5 and the steel mesh of the composite wallboard together form the concrete composite wallboard.

Lower inner leaf concrete sheet inverted L-shaped ring beam structure: inverted L-shaped ring beam 15, inverted L-shaped ring beam reinforcement cage 14, vertical reinforcement of the inner leaf reinforcement mesh 7 protruding from the upper part of the rectangular ring beam, and inside the lower part of the rectangular ring beam. The 300mm height reinforcement mesh of the leaf reinforcement mesh 7 constitutes the reinforcement structure of the inverted L-shaped ring beam. The inverted L-shaped ring beam is composed of a rectangular concrete ring beam and a 300 mm high inner leaf concrete slab under the rectangular ring beam.

The built-in steel structure of the outer leaf concrete sheet self-tapping nail block of the upper and lower composite wall panels: the upper force plate 9 of the outer leaf and the lower force plate 10 of the outer leaf are respectively welded with the reinforcement mesh 6 of the upper and lower outer leaves, which is convenient for self-tapping nails and self-tapping. The wooden block 13 is bonded with the upper force plate and the back of the lower force transmission plate with structural adhesive. The upper force plate 9 and the lower force transmission plate 10 of the outer leaf are connected by the outer leaf connecting steel plate 11 with self-tapping nails 12 to form self-tapping nail aggregate concrete Built-in steel structure of thin wall panels.

T-shaped self-tapping screw aggregates connecting the lower inner leaf concrete sheet with the inverted L-shaped ring beam and the upper inner leaf concrete sheet and floor slab Built-in steel structure: the welding on the outer longitudinal bars of the lower inner leaf concrete sheet inverted L-shaped ring beam doubles as force transmission Steel plate and T-shaped steel plate with self-tapping screw holes for connecting steel plates, its upper flange is connected with self-tapping screws of one-shaped force-transmitting steel plate on the concrete sheet of the upper inner leaf, and its horizontal web is self-tapping with one-shaped force-transmitting steel plate on the floor slab The built-in steel structure of T-shaped self-tapping nail aggregate concrete with a peripheral outline of 40mm formed by T-shaped connection steel plate.

The built-in steel structure connected by the self-tapping nail block between the lower inner leaf concrete thin wall panel and the floor slab: the inverted L-shaped ring beam reinforcement cage of the inverted L-shaped ring beam , the inverted L-shaped power transmission steel plate and connecting steel plate are connected with the one-shaped floor power transmission steel plate 19 by self-tapping screws, forming an inverted L-shaped connection steel plate with an inverted L-shaped self-tapping nail with an outline of 40mm.

Upper composite wall panel 1 and lower composite wall panel 2: It is a single-row reinforced mesh concrete sheet composed of inner leaf reinforcement mesh 7, outer leaf reinforcement mesh 6, concrete inner blade 4, and concrete outer blade 3, and is sandwiched between the sheets. The core insulation board 5 is a composite wall board formed by connecting the tie steel bars 8 to form a structure, enclosure, and thermal insulation. The upper part of the lower inner leaf concrete board is provided with an inverted L-shaped ring beam 15. The inverted L-shaped ring beam reinforcement structure includes an inverted L-shaped ring beam. L-shaped ring beam reinforcement cage 14 and a single row of reinforcement mesh with a height of 300mm for the lower inner leaf concrete slab.

Concrete outer blade 3 and concrete inner blade 4: refer to the concrete panels with single-row steel mesh on both sides of the upper composite wall panel 1 and the lower composite wall panel 2, and the concrete panels are made of coarse aggregate with a particle size of 5mm to 10mm. Fine stone concrete is poured.

Sandwich insulation board 5: polystyrene extruded plastic board XPS, polystyrene foam plastic board EPS or phenolic foam composite board PUR can be used.

Inner leaf reinforcement mesh 7, outer leaf reinforcement mesh 6, and knotted steel reinforcement 8: It is a single-row reinforcement mesh for the inner and outer leaf concrete slabs of the composite wall panel, which is formed by binding or welding horizontally distributed steel bars and vertically distributed steel bars; The reinforcing bar 8 is the connecting structural reinforcing bar of the single-row reinforcing mesh that ties the inner and outer leaf concrete slabs.

The upper force transmission plate 9 of the outer leaf, the lower force transmission plate 10 of the outer leaf and the outer leaf, and the connecting steel plate 11 of the outer leaf: the upper and lower force transmission plates of the outer leaf and the lower force transmission plate 10 of the outer leaf and the outer leaf are welded up and down at the assembly position of the outer leaf reinforcement mesh 6. After the outer leaf connecting steel plate 11 is embedded in the outer leaf connecting plate groove 22 of the wall panel, self-tapping screws 12 are used to freely pass through the outer leaf connecting steel plate and then connect to the upper and lower force transmission plates of the outer leaf.

Self-tapping screw 12, ST 6.3 type hexagonal tail drill self-tapping screw can be used, the total length of the self-tapping screw is 20mm, the thread is full length, and the spacing of the self-tapping screw is generally 25mm-50mm.

The wood block 13 is a wood block that is pasted to the position of the self-tapping nail on the back of the power transmission board with adhesives such as glass glue, so that the self-tapping nail can penetrate the power transmission steel plate and penetrate into the wood block. The thickness of the wood block is 12mm .

Inverted L-shaped ring beam reinforcement cage 14, inverted L-shaped ring beam 15: It is a ring beam structure prefabricated on the upper part of the lower concrete inner blade 4, and the vertically distributed reinforcement bars of the inner leaf single-row reinforcement mesh 7 pass upward through the ring beam reinforcement cage, The height through which it passes is equal to the height of the post-cast concrete strip 27 . The inverted L-shaped ring beam 15 is composed of reinforced cage concrete with a rectangular section and an inner leaf concrete slab with a height of 300mm under the rectangular section.

T-shaped force transmission steel plate 16, inner leaf force transmission steel plate 17, floor plate force transmission steel plate 19: T-shaped force transmission steel plate 16 is welded on the outer longitudinal reinforcement of the inverted L-shaped ring beam reinforcement cage 14 for both force transmission and connection. The upper part of the edge is connected with the inner leaf force transmission steel plate 17 built in the upper inner leaf concrete slab with self-tapping screws, and the horizontal web is connected with the built-in force transmission steel plate 19 of the floor slab by self-tapping screws.

Welding seam 18 between the inner leaf force transmission steel plate on the upper wall and the inner leaf steel mesh: it is the welding gap of about 2mm left when the inner leaf force transmission steel plate on the upper wall and the inner leaf steel mesh are not tightly welded. The cover gap can adjust the T-shaped force transmission The steel plate is just attached to the inner leaf force transmission steel plate of the wall.

Concrete floor reinforcement mesh 20, concrete floor 21: The concrete floor reinforcement mesh 20 is the reinforcement structure of the concrete floor 21, which is determined according to the force requirements and the connection structure requirements with the inverted L-shaped ring beam of the composite wall panel.

The groove 22 of the outer leaf connecting plate of the wall panel, the groove 23 of the inner leaf of the wall panel, and the groove 24 of the floor connecting plate: respectively used to embed the one-shaped connecting steel plate into the upper and lower outer leaf concrete slabs, and the upper flange of the T-shaped connecting steel plate into the upper inner leaf. Concrete slab, T-shaped connecting steel plate horizontal web is embedded in the end slab.

Inverted L-shaped force-transmitting steel plate 25: it doubles as a force-transmitting and connecting steel plate. Its inverted-L-shaped vertical steel plate is welded with the outer longitudinal bars of the inverted-L-shaped ring beam reinforcement cage 14, and its inverted-L-shaped horizontal steel plate is connected to the floor reinforcement mesh 20. The upper welded floor power transmission steel plate 19 is connected with self-tapping screws.

The upper and lower composite wall panels and the outer leaf concrete slabs of the outer leaf concrete slabs bring.

The post-casting strip 27 on the inverted L-shaped ring beam connecting the upper and lower inner leaf concrete sheets and the floor slab: it is the vertical direction of the reinforcement mesh of the upper and lower inner leaf concrete slabs on the inverted L-shaped ring beam left after assembling the upper and lower composite wall panels. Concrete strip formed after pouring fine stone concrete in the overlapping area of steel bar and floor steel bar.

The overall approach is: first, according to the architectural design and structural layout, determine the layout position and specific size of the prefabricated sandwich thermal insulation concrete composite shear wall panels and floor slabs. Design the wall and floor section thickness and reinforcement according to the load value, design the inverted L-shaped ring beam section and reinforcement, and check the wall according to the designed wall section size and material strength. After completing the wall and floor design , Design the connection structure of the wall panel and the connection structure of the wall panel and the floor. According to the design scheme of composite wall panel and floor slab and their assembly connection nodes, draw detailed structural structural drawings, and carry out prefabricated composite wall panel and floor slab production, transportation and on-site assembly construction.

The construction process of the combined connection between the prefabricated composite wall panel and the floor self-tapping nail block and the post-casting belt is as follows: 1) Prefabricated upper and lower concrete thin-slab sandwich polystyrene wall panels with upper and lower force-transmitting steel plates, and the end Reinforced concrete floor with force-transmitting steel plates; after the upper and lower composite wall panels and floor slabs are in place according to the assembly positions, self-tapping screws are used to freely pass through the holes of the connecting steel plates to connect the force transmission on the inner and outer leaf concrete slabs of the composite wall panel. Steel plates and force-transmitting steel plates at the end of the floor. 2) Use high-performance mortar to smooth the grooves on the wall and the end of the floor. 3) Use fine stone concrete to pour the post-casting strips of the outer leaves of the upper and lower composite wall panels, and the post-cast strips where the inner leaves and floor slabs of the upper and lower composite wall panels meet. 4) Paint the exterior wall with waterproof paint.

The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Equivalent replacements or changes to the inventive concept shall all fall within the protection scope of the present invention.

Claims (8)

1. The assembled composite wallboard and floor self-tapping nail cluster and post-cast strip combined connecting structure is characterized by comprising an upper composite wallboard (1), a lower composite wallboard (2), a concrete floor (21), an inverted L-shaped ring beam, built-in steel structures of an upper composite wallboard outer leaf concrete sheet self-tapping nail cluster, a T-shaped self-tapping nail cluster built-in steel structure formed by connecting a lower inner leaf concrete sheet inverted L-shaped ring beam, an upper inner leaf concrete sheet and a floor, and built-in steel structures formed by connecting a lower inner leaf concrete sheet and a floor self-tapping nail cluster;

the upper composite wallboard (1) and the lower composite wallboard (2) respectively comprise a concrete outer leaf plate (3), a concrete inner leaf plate (4) and a sandwich insulation board (5), the concrete is poured into the inner leaf reinforcing mesh (7) to form the concrete inner leaf plate (4), the concrete is poured into the outer leaf reinforcing mesh (6) to form the concrete outer leaf plate (3), and the inner leaf reinforcing mesh (7), the outer leaf reinforcing mesh (6) and the sandwich insulation board (5) are connected together through welding or binding of tie bars (8); the concrete floor (21) is made by pouring concrete into a floor reinforcing mesh (20);

an inverted L-shaped ring beam (15) is arranged at the joint of the upper composite wallboard (1) and the lower composite wallboard (2), a reinforcing mesh of the inverted L-shaped ring beam (15) consists of an inverted L-shaped ring beam reinforcing cage (14), vertical reinforcing steel bars of an inner leaf reinforcing mesh (7) protruding from the upper part of the rectangular ring beam and an inner leaf reinforcing mesh (7) at the lower part of the rectangular ring beam, and the inverted L-shaped ring beam consists of a rectangular concrete ring beam and an inner leaf concrete slab below the rectangular ring beam;

the built-in steel structure of the self-tapping screw assembling block of the upper and lower composite wallboard outer leaf concrete sheets comprises an outer leaf upper force transmission plate (9) and an outer leaf lower force transmission plate (10), wherein the outer leaf upper force transmission plate (9) and the outer leaf lower force transmission plate (10) are respectively welded with an upper outer leaf reinforcing mesh and a lower outer leaf reinforcing mesh (6), a wood block (13) for self-tapping of the self-tapping screw is conveniently bonded with the back surfaces of the outer leaf upper force transmission plate (9) and the outer leaf lower force transmission plate (10), and the outer leaf upper force transmission plate (9) and the outer leaf lower force transmission plate (10) are connected through an outer leaf connecting steel plate (11) by adopting a self-tapping screw (12);

the T-shaped self-tapping nail set block built-in steel structure connected with the lower inner leaf concrete thin plate inverted L-shaped ring beam, the upper inner leaf concrete thin plate and the floor slab comprises a T-shaped force transmission steel plate (16), a T-shaped force transmission steel plate (16) with self-tapping nail holes and used as the force transmission steel plate and a connecting steel plate is welded on a longitudinal rib at the outer side of the lower inner leaf concrete thin plate inverted L-shaped ring beam, the upper flange of the T-shaped force transmission steel plate (16) is connected with the inner leaf force transmission steel plate (17) on the upper inner leaf concrete thin plate through a self-tapping nail, and the horizontal web plate of the T-shaped force transmission steel plate is connected with the floor slab force transmission steel plate (19) through the self-tapping nail;

the built-in steel structure connected with the self-tapping nail cluster block between the lower inner leaf concrete thin wall plate and the floor slab comprises an inverted L-shaped force transmission steel plate (25), an inverted L-shaped force transmission steel plate (25) is welded on the inner side longitudinal rib of an inverted L-shaped ring beam steel reinforcement cage (14), and the inverted L-shaped force transmission steel plate (25) is connected with a one-shaped floor slab force transmission steel plate (19) through a self-tapping nail (12).

2. The fabricated composite wall panel and floor slab self-tapping nail cluster and post-cast strip combined connection structure of claim 1, wherein the inner leaf reinforcement meshes (7) and the outer leaf reinforcement meshes (6) are single-row reinforcement meshes and are formed by binding or welding horizontal distribution reinforcements and vertical distribution reinforcements; the concrete outer blade plate (3) and the concrete inner blade plate (4) are both cast by coarse aggregate and fine aggregate concrete with the particle size of 5-10 mm.

3. The assembled composite wall panel and floor slab self-tapping nail cluster and post-cast strip combined connection structure of claim 1, wherein the outer blade upper force transfer plate (9) and the outer blade lower force transfer plate (10) are respectively welded at the joint of the outer blade reinforcing mesh (6) of the upper composite wall panel (1) and the lower composite wall panel (2), the outer blade connecting steel plate (11) is embedded into the wall panel outer blade connecting plate groove (22), and then the outer blade connecting steel plate (11) is connected with the outer blade upper force transfer plate (9) and the outer blade lower force transfer plate (10) by the self-tapping nail (12).

4. The assembled composite wall panel and floor slab tapping block and post-cast strip combination connection structure as claimed in claim 1, wherein the vertically distributed reinforcement of the inner leaf reinforcement mesh (7) passes upward through the inverted L-shaped ring beam reinforcement cage (14) by a height equal to the height of the post-cast concrete strips (27).

5. The assembled composite wall panel and floor slab self-tapping nail cluster and post-cast strip combined connection structure of claim 1, wherein the vertical steel plate of the inverted-L-shaped force transmission steel plate (25) is welded with the longitudinal bar outside the inverted-L-shaped girt reinforcement cage (14), and the horizontal steel plate of the inverted-L-shaped force transmission steel plate (25) is connected with the floor slab force transmission steel plate (19) welded on the floor slab reinforcement mesh (20) by a self-tapping nail.

6. The fabricated composite wall panel and floor slab tapping block and post-cast strip combination connection structure of claim 1, wherein after the upper and lower composite wall panels are assembled, the upper and lower outer leaf concrete slab steel bar mesh lap joint areas are provided with the wall panel outer leaf post-cast strips (26) and the post-cast strips (27) connecting the upper and lower inner leaf concrete sheets and the floor slab on the inverted L-shaped ring beams.

7. The fabricated composite wallboard and floor slab tapping nail cluster and post-cast strip combined connection structure as claimed in claim 1, wherein the insulation board (5) is made of polystyrene extruded sheet or polystyrene foam plastic sheet or phenolic foam composite board.

8. The method for connecting the assembled composite wallboard and the floor slab self-tapping nail cluster block with the post-cast strip in a combined manner is characterized by comprising the following steps of:

the first step is as follows: prefabricating a composite wallboard with an upper inner leaf and an outer leaf provided with a linear force transmission steel plate, prefabricating a composite wallboard with a lower outer leaf provided with a linear force transmission steel plate, an inner leaf provided with an inverted L-shaped ring beam, a T-shaped connecting steel plate and an inverted L-shaped connecting steel plate, and prefabricating a reinforced concrete floor;

the second step is that: lapping the reinforcing steel bars at the end part of the reinforcing steel bar floor on the inverted L-shaped ring beam of the composite wallboard and arranging cement cushion blocks with the thickness not less than 10mm, wherein the cement cushion blocks are used for forming a protective layer of the floor anchoring reinforcing steel bars; connecting the horizontal flange of the T-shaped connecting steel plate and the horizontal steel plate of the inverted L-shaped connecting steel plate with a floor slab force transmission steel plate respectively by using self-tapping screws;

the third step: installing an upper composite wallboard, coating glass cement on the contact surface (the position of a buttress at the end part of the upper composite wallboard) of the upper composite wallboard and the lower composite wallboard, then placing the upper composite wallboard on the lower composite wallboard, adopting a self-tapping screw to freely penetrate through a hole on a straight connecting steel plate and then to be in self-tapping connection with a connecting steel plate of an outer leaf concrete plate of the upper composite wallboard and the lower composite wallboard, and adopting a self-tapping screw to freely penetrate through a hole on the upper flange of a T-shaped connecting steel plate and then to be connected with a connecting steel plate of an inner leaf concrete plate of the upper composite wallboard;

the fourth step: troweling the groove at the position of the connecting steel plate of the self-tapping screw of the composite wallboard by using high-performance mortar;

the fifth step: pouring post-pouring strips of the outer leaf concrete plates of the upper and lower composite wallboards and post-pouring strips for connecting the inner leaf concrete plates and the floor concrete by using fine stone concrete;

and a sixth step: painting waterproof paint.

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