CN217602256U - Assembly type L-shaped composite wallboard self-tapping nail cluster and post-cast strip combined connection structure - Google Patents

Abstract

The utility model discloses an assembled L shape composite wall panel self-tapping nail glomeration and post-cast strip built-up connection structure belongs to assembled concrete building structure engineering technical field. The method comprises the following steps: the self-tapping nail set block comprises force transmission steel plates welded on single-row steel bar nets of inner and outer leaf concrete sheets of the linear-shaped upper and lower L-shaped composite wallboards, and an embedded steel-structure concrete thin wallboard block with the thickness of the concrete sheet at the outline of a force transmission steel plate area after the connection steel plates are connected by self-tapping nails; the post-cast strip is a reinforced concrete thin wallboard strip formed by lapping a reinforcing mesh reserved for prefabricating the L-shaped upper and lower composite wallboard concrete sheets on the post-cast strip and pouring fine stone concrete; the L-shaped constructional columns are concrete hidden columns positioned at the inner corners of the composite wall panels. The combined connecting structure is an integration of a self-tapping nail cluster, a cast-in-place strip and an L-shaped hidden column connecting structure, and has the remarkable advantages of strong earthquake-resistant bidirectional shear force, bending moment and torque capacity and high-efficiency cooperative stress.

Description

The combined connection structure of self-tapping nail block and post-casting strip of prefabricated L-shaped composite wallboard

technical field

The utility model relates to a combined connection structure of an assembled L-shaped composite wallboard self-tapping nail block and a post-casting strip, belonging to the technical field of assembled concrete building structure engineering.

Background technique

The technology research and development of ultra-low energy consumption houses has drawn great attention from 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 bottlenecks: (1) The assembly of the L-shaped wall at the corner of the building is complicated. The L-shaped wall at the corner is subjected to bending, shearing and torsional earthquakes, so it is necessary to set up corner structural columns and one-shaped composite wall. The body assembly method cannot solve the technical problems caused by the geometry and force requirements of L composite wall panels. (2) The traditional shear wall reinforcement structure has large distribution spacing and large steel bar diameter. If the steel bar lap anchoring technology is used, the post-cast belt section height and size are large, and the cast-in-place amount is large, which is difficult to meet the needs of the inner and outer leaf single-row reinforced mesh concrete sheets. The height of the post-cast concrete section required for the assembly of the sandwich polystyrene panel wall panel should not be greater than the requirement of 180mm; (3) the traditional shear wall sleeve connection technology is not suitable for the inner and outer leaf single-row reinforced mesh concrete sheet sandwich polyphenylene The thickness of the inner and outer leaf thin wall panels is only 40mm-60mm; (4) 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 sandwich polystyrene panel wall panels. Assembly, because the polystyrene board is sandwiched between the inner and outer leaf wall panels and considering the thermal bridge problem, the polystyrene board is not allowed to punch through bolts, so it is difficult to assemble the inner and outer leaf concrete thin wall panels separately by using the traditional steel plate bolt connection technology; The price of tapping screws is much lower than that of bolts. The connection between the thin-walled light steel keels of the thin-walled light steel keel structure is connected by self-tapping screws. The force transmission between the two is realized by the engagement with the self-tapping screw, and there is no extrusion friction; however, the assembly of the inner and outer leaf single-row reinforced mesh concrete sheet sandwich polystyrene panel wall panels belongs to the assembly of reinforced concrete wall panels, and requires friction force at the same time. and occlusal force, it is obvious that the current technology of directly connecting light steel keels with self-tapping screws is difficult to meet the assembly and force transmission requirements of the inner and outer leaf concrete thin wall panels of composite wall panels; (6) traditional shear wall cast-in-place belt assembly, due to The amount of concrete poured in place is large and the expansion force of the concrete is large. It is necessary to add temporary construction brackets to locate the formwork, which is expensive and has poor flexibility. Concrete post pouring belt construction

Utility model content

The technical problem to be solved by the utility model is to provide an assembled L-shaped composite wallboard self-tapping nail block and post-casting strip combined connection structure, which overcomes the traditional technology of large in-situ casting, high cost and poor flexibility. question.

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

An assembled L-shaped composite wall panel self-tapping nail block and post-casting strip combined connection structure, including an L-shaped upper composite wall panel, an L-shaped lower composite wall panel, an outer leaf concrete slab, an inner leaf concrete slab, and a thermal insulation board , Inner leaf concrete slab reinforcement mesh, outer leaf concrete slab reinforcement mesh, tie reinforcement, connecting plate reinforcement reinforcement, bending reinforcement, upper force one-shaped steel plate, lower force one-shaped steel plate, upper force L-shaped steel plate, downward force L-shaped steel plate, one-shaped connecting steel plate, L-shaped connecting steel plate, self-tapping nail, post-casting strip, one-shaped groove, L-shaped groove, L-shaped hidden column reinforcement cage, L-shaped hidden column, wood block;

The reinforcement mesh of the inner leaf concrete slab, the reinforcement mesh of the outer leaf concrete slab and the insulation board are connected by the tie steel bars, and the outer leaf concrete slab of the composite wall panel and the inner leaf concrete slab of the wall panel are formed to form an L shape after pouring the composite wall panel. Upper composite wallboard, L-shaped lower composite wallboard;

The upper force-shaped steel plate and the downward force-transmitting one-shape steel plate are welded with the vertical distribution steel bars of the inner and outer leaf reinforcement meshes of the composite wall panel, and are welded with the reinforcing steel bars of the connecting plate and the bending steel bars, so as to facilitate the penetration of the self-tapping nails in the shape of force transmission. The wood block of the steel plate is bonded with the upper-force-shaped steel plate and the lower-force-shaped steel plate through glass glue or structural adhesive; the upper-force-shaped steel plate and the lower-force-shaped steel plate are connected by a single-shaped connecting steel plate with self-tapping screws to form a single-shaped steel plate. The built-in steel structure of self-tapping nail aggregate concrete thin wall panel;

The L-shaped steel plate of the upper force and the L-shaped steel plate of the lower force are welded to the steel mesh at the corner of the outer leaf of the wall panel, and the L-shaped steel plate is welded to the reinforcing steel bar of the connecting plate and the bending steel bar, which is convenient for the self-tapping nail to penetrate the L-shaped force transmission steel plate. The upper and lower L-shaped steel blocks are bonded to the upper L-shaped steel plate and the lower L-shaped steel plate by glass glue or structural glue; The steel plate and the lower transmission L-shaped steel plate are connected by self-tapping screws through the L-shaped connecting steel plate, forming the built-in steel structure of the L-shaped self-tapping screw aggregate concrete thin wall panel;

The post-cast strip is arranged in the middle of the post-cast concrete connection structure of the inner and outer leaf concrete sheets of the prefabricated upper and lower composite walls;

The surface layer of the L-shaped upper-strength steel plate and the lower-strength steel plate of the concrete thin wall panel is reserved with an L-shaped groove into which the L-shaped connecting steel plate can be placed; The surface layer is reserved with a groove in which the connecting steel plate is placed; the L-shaped dark column reinforcement cage is placed in the reserved L-shaped dark column position, and then the L-shaped dark column formed by pouring fine stone concrete is poured.

Preferably, the thermal insulation board is made of polystyrene extruded plastic board, polystyrene foam plastic board or phenolic foam composite board, and the surface of the thermal insulation board is provided with dovetail grooves, and the inner and outer leaf concrete boards are connected with all the outer and inner leaves through the dovetail grooves. The insulation board is fully engaged.

Preferably, the tie bar is a steel bar with a 135° hook on one side, and one end of the tie bar with a hook is tied and bound or welded with the horizontal and vertical steel nodes of the inner leaf reinforcement mesh, The other end is welded through the composite wallboard insulation board and the outer leaf reinforcement mesh node.

Preferably, the reinforcing steel bars of the connecting plate are horizontally distributed steel bars of the inner and outer leaf concrete thin-plate reinforcement meshes of the composite wall panel, which are connected with the upper flat steel plate with a vertical force, the flat steel plate with a downward force transfer and the L-shaped upward force flat steel plate. The force steel plate and the L-shaped lower force transmission steel plate are welded and connected.

Preferably, the diameter of the bending steel bar is equal to the diameter of the steel mesh steel bar, and the elbows at both ends of the bending steel bar are respectively welded to adjacent force transmission steel plates.

Preferably, the one-shaped upper force transmission flat steel plate and the one-shaped lower force transmission flat steel plate are prefabricated on the bottom of the upper wall plate and the top of the lower wall plate, respectively, and the L-shaped upper force transmission steel plate and the lower force transmission steel plate are respectively prefabricated. Factory prefabricated at the bottom of the upper panel and the top of the lower panel, respectively.

The beneficial effects produced by the above technical solutions are:

(1) The self-tapping screw block solves five major technical problems: 1) The assembly structure of the L-shaped double-leg wall panel at the corner of the composite wall panel is complex, and the shear and torsional performance of the corner of the composite shear wall structure is poor; 2) The problem of integrated connection between the inner and outer leaf concrete sheets of the L-shaped composite wall panel is the thin and dense steel mesh; 3) The problem of temporary buttresses with the height of the post-cast strip during the assembly process of the upper and lower composite wall panels; 4) The steel plate bolts connect the concrete For thin wall panels, the existing interface between the concrete thin plate and the sandwich polystyrene panel is the problem of the blind area of connection construction; 5) The thermal bridge problem exists in the transparent connection of composite wall panels with steel plates and screws.

(2) The post-casting strip solves three major technical problems: First, it overcomes the disadvantages of the large amount of cast-in-place after the traditional shear wall steel bar overlap. The size of the mesh lap connection is small. The diameter of the high-strength steel bar used for the steel mesh reinforcement is only 4mm, and the lap anchorage length is only 120mm, which can meet the specification requirements of 30d (d is the diameter of the steel bar). The section size is only 40mm×120mm, and the amount of concrete pouring is small; while the thickness of the traditional shear wall is generally not less than 160mm, for the steel bar with a diameter of 12mm, the anchorage length needs to be 360mm to meet the specification requirements of 30d (d is the diameter of the steel bar). The size of the strip section is 160mm × 360mm, which is 6 times the sum of the cross-sectional area of the cast-in-place strip of the concrete wall panels of the inner and outer leaves of the composite wall, and the amount of concrete pouring is large. Second, the use of inner and outer leaf concrete thin wall panels adopts fine and dense steel mesh, which solves the traditional shear wall distribution technology with thicker steel bars, larger steel bar spacing, high cost of steel sleeve connection and unsuitable for thin wall panel connection. problem. The third is that the cast-in-place connection joints of the upper and lower composite wall panels are compact and the force transmission is continuous, which solves the problems of efficient force bearing and prevention of rainwater leakage.

(3) Advantages of L-shaped structural columns: It effectively improves the integrity of prefabricated low-rise buildings, enhances the load-bearing, shear, bending and torsion resistance of the corners of the building, and significantly enhances the ability of the structure to resist earthquake collapse.

(4) Advantages of the combined connection structure: the end of the two walls of the L-shaped composite wall panel and the concrete sheet of the inner leaf are close to the L-shaped hidden column. The block steel-concrete composite node connection structure is organically combined with the L-shaped concealed column and the post-cast concrete strip concrete node connection structure of the two wall piers to form a composite connection structure that cooperates to resist the two-way shear, torque and bending moment of the earthquake. It has the advantages of self-tapping screw block connection, post-casting strip connection and structural column connection combination. In the construction stage, the self-tapping screw block steel structure solves the problem of temporary buttresses that need to leave the height of the post-cast strip during the assembly process of the upper and lower composite wall panels. The integration of the advantages of force transmission and structural columns to strengthen the corner force transmission has the significant advantage of synergistic and efficient force bearing.

Description of drawings

Fig. 1 is the overall structure schematic diagram;

Figure 2 is a schematic diagram of the structure of an assembled L-shaped composite wall;

Figure 3 is a schematic diagram of an assembled L-shaped composite wall reinforcement and steel parts;

Figure 4 is a schematic diagram of the structure of the connection node of the wall panel;

Figure 5 is a schematic diagram of the L-shaped dark column structure;

Fig. 6 is the schematic diagram of one-shaped self-tapping screw aggregate block steel structure;

Fig. 7 is the schematic diagram of L-shaped self-tapping screw aggregate block steel structure;

Figure 8 is a schematic diagram of the formation process of the self-tapping screw aggregate node in the middle of the wall;

Fig. 9 is a schematic diagram of the formation process of self-tapping screw aggregate nodes at the corner of the wall;

Figure 10 is a schematic diagram of the manufacturing process of L-shaped composite shear wall panels;

In the figure: 1. L-shaped upper composite wallboard; 2. L-shaped lower composite wallboard; 3. Concrete slab of inner leaf; 4. Concrete slab of outer leaf; 5. Insulation board; 6. Reinforced mesh of concrete slab of inner leaf; 7 , Reinforcement mesh of outer leaf concrete slab; 8. Tensioning steel bar; 9. Reinforcing steel bar for connecting plate; 10. Bending steel bar; 11. One-shaped steel plate for uploading force; Steel plate; 14. L-shaped steel plate for lower transmission force; 15. One-shaped connecting steel plate; 16. L-shaped connecting steel plate; 17. Self-tapping screw; 18. Post-casting strip; 19. One-shaped groove; 20. L-shaped concave Slot; 21, L-shaped dark column reinforcement cage; 22, L-shaped dark column; 23, wood block.

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 1-10, its assembled L-shaped composite wallboard self-tapping nail block and post-casting strip combined connection structure, which consists of one-shaped self-tapping nail block, L-shaped self-tapping nail block, and post-cast concrete. The space force connection area formed by the combination of strips and L-shaped concrete columns has the effect of resisting seismic bending moment, shear force and torque.

One-shaped self-tapping screw block, which is the end of the single-row reinforced mesh concrete sheet of the inner and outer leaves of the upper and lower L-shaped composite wall panels, and the position of the single-row reinforced mesh concrete sheet of the inner leaf at the corner near the L-shaped hidden column , a concrete thin wall panel block with a built-in steel structure connected by a self-tapping screw group and its one-shaped connecting steel plate. Formation of one-shaped self-tapping screw block: welding the upper and lower force-transmitting steel plates to the steel mesh in the middle of the upper and lower wall panels, and making a one-shaped connecting steel plate with self-tapping screw penetration holes connecting the upper and lower force-transmitting steel plates. Each self-tapping screw passes through the one-shaped connecting steel plate and then self-tapping to connect the upper and lower force-transmission steel plates. The concrete thin wall panel block of Tibetan steel structure is called a one-shaped self-tapping nail block.

L-shaped self-tapping screw block, which is the corner of the intersection of the upper and lower L-shaped composite wall panels with single-row reinforced mesh concrete sheets on the outer leaves of the two wall piers. Steel-framed L-shaped concrete siding block. Formation of L-shaped self-tapping screw aggregate blocks: Weld L-shaped upper and lower force transmission steel plates with steel mesh on the outer leaf at the corners of the upper and lower composite wall panels, and make L-shaped connecting steel plates with penetration holes for self-tapping screws. The tapping screw freely passes through the L-shaped connecting steel plate and then self-tapping to connect the L-shaped upper and lower force-transmitting steel plates. The L-shaped force-transmitting steel plate is recessed into the L-shaped groove of the wall panel and smoothed with mortar. The L-shaped upper and lower force-transmitting steel plates The L-shaped concrete thin-wall panel block with built-in steel structure with the thickness of the outer concrete sheet is called the L-shaped self-tapping screw block.

Post-cast concrete strip, which is a concrete thin wall strip formed by lap jointing and pouring fine stone concrete in the post-pouring horizontal strip area by the steel mesh left by the upper and lower L-shaped composite wall panels on the two wall legs and the inner and outer leaf concrete sheets. bring.

L-shaped hidden column, which consists of a factory-prefabricated L-shaped reinforced cage placed at the corner of the L-shaped composite wall panel, a reinforced concrete structural column formed by cast-in-place fine stone concrete, a cast-in-place L-shaped structural column and the inner wall of the composite wall panel. The surfaces of the leaf concrete slabs are flush and connected into a whole, and the force is cooperatively applied, which effectively improves the integrity of the corner walls of the prefabricated composite wall panel structure.

The combined connection structure refers to the respective one-shaped self-tapping screw blocks and L-shaped self-tapping screw blocks at the corners of the L-shaped composite wall panel at the ends of the two wall limbs and the inner leaf concrete sheet near the L-shaped hidden column. Steel-concrete The combined node connection structure is connected with the L-shaped concealed column and the post-cast concrete strip concrete node connection structure of the two wall piers to form a combination of the two-way shear, torque and bending moment structures that synergistically resist earthquakes.

The L-shaped upper composite wall panel 1 and the L-shaped lower composite wall panel 2: the inner leaf concrete slab reinforcement mesh 6, the outer leaf concrete slab reinforcement mesh 7 and the insulation board 5 are connected by the tie reinforcement 8, and the outer leaf concrete of the composite wall panel is poured. The panel 3 and the inner leaf concrete panel 4 of the wall panel form an L-shaped upper composite wall panel 1 and an L-shaped lower composite wall panel 2 .

The built-in steel structure of the two wall ends of the L-shaped composite wall panel and the one-shaped self-tapping screw aggregate concrete thin wall panels near the L-shaped hidden column position: the upper force one-shape steel plate 11 and the lower force one-shape steel plate 12 is welded with the vertical distribution steel bars of the inner and outer leaf reinforcement meshes of the composite wall panel, and is welded with the reinforcing steel bars 9 of the connecting plate and the bending steel bars 10, so as to facilitate the self-tapping nails to penetrate the wood block 23 of the one-shaped force-transmitting steel plate and the uploading force-shaped steel plate And the lower transmission force one-shaped steel plate is bonded by glass glue or structural glue. The upper force one-shaped steel plate 11 and the downward force one-shaped steel plate 12 are connected by a one-shaped connecting steel plate 15 using self-tapping screws 17 to form a built-in steel structure of one-shaped self-tapping screw aggregate concrete thin wall panels.

The built-in steel structure of the L-shaped self-tapping nail aggregated concrete thin wall panel at the corner of the composite wall panel: the L-shaped steel plate 13 of the upper force and the L-shaped steel plate 14 of the lower force are welded to the steel mesh at the corner of the outer leaf reinforcement mesh of the wall panel, L The welded steel plate is welded with the reinforcing steel bar 9 of the connecting plate and the bending steel bar 10, which is convenient for the self-tapping nail to penetrate the wood block 23 of the L-shaped force transmission steel plate, and the upper force L-shaped steel plate and the lower force transmission L-shaped steel plate are bonded by glass glue or structural glue. . The upper force L-shaped steel plate 13 and the lower force L-shaped steel plate 14 are connected by the L-shaped connecting steel plate 16 using self-tapping screws 17 to form the built-in steel structure of the L-shaped self-tapping screw aggregate concrete thin wall panel.

One-shaped self-tapping screw block, L-shaped self-tapping screw block, post-cast strip, L-shaped structural column combined connection: place self-tapping screw block in the recessed wall panel, one-shaped connection to the steel plate groove 19, L-shaped connection The groove 20 of the steel plate is smoothed with mortar, the post-casting strip 18 is poured with fine stone concrete and cured, the L-shaped dark column reinforcement cage is placed, and the light steel formwork is supported and the dark column fine stone concrete is poured to form an L-shaped composite wall panel. The self-tapping screw block and the post-casting strip are combined to connect the structure.

L-shaped upper composite wall panel 1 and L-shaped lower composite wall panel 2: It is an assembled sandwich thermal insulation concrete composite shear wall panel. Concrete inner blade, and a single row of reinforced concrete outer blade composed of outer blade concrete plate 3 and outer blade reinforcement mesh 7, and a composite insulation wall panel formed by tie reinforcement 8 with insulation board 5.

The outer leaf concrete slab 3 and the inner leaf concrete slab 4: refer to the outdoor concrete slab and the indoor concrete slab of the prefabricated L-shaped sandwich core thermal insulation concrete composite wall panel. The concrete slab is poured with 5mm~10mm fine stone concrete, and the concrete strength grade is C30~C40. The concrete inner leaf and the concrete outer leaf are connected by tie-bars 8 .

Insulation board 5: polystyrene extruded board XPS, polystyrene foam board EPS or phenolic foam composite board PUR can be used. The relevant performance of the thermal insulation board used shall meet the requirements of national regulations. The surface of the insulation board 5 is provided with a dovetail groove, and the inner and outer leaf concrete can be fully engaged with the insulation board through the dovetail groove, so as to enhance the shear resistance and anti-stripping ability of the connection interface.

Inner leaf concrete slab reinforcement mesh 6, outer leaf concrete slab reinforcement mesh 7: Reinforcement mesh is configured for the inner and outer leaf concrete sheets of the assembled L-shaped composite wall panel. The L-shaped reinforcement mesh is composed of horizontally distributed steel bars and vertically distributed steel bars. Reinforcement mesh can be prepared by binding or welding.

Tie bar 8: It is a tie bar with 135° hooks bent on one side. One end of the tie steel bar 8 with hooks is tied and bound or welded with the horizontal and vertical steel bar nodes of the inner leaf steel mesh, and the other end penetrates the composite wallboard insulation board 5 to be welded with the outer leaf steel mesh nodes.

Connecting plate reinforcing steel bar 9: It is the horizontal distribution steel bar of the inner and outer leaf concrete thin-plate reinforcement mesh of the composite wall panel. The lower force transmission steel plate 14 is welded.

Bending steel bar 10: it is an additional reinforcing steel bar at the middle of the height of a shape upload steel plate 11, a shape lower force steel plate 12, an L-shaped upper force steel plate 13, and an L-shaped lower force steel plate 14. The bending steel bar 10 and the steel bar The diameter of the mesh steel bar is equal, and the two ends of the steel bar are bent by 20mm, and the elbows at both ends are welded to the adjacent force-transmitting steel plates.

A flat upper transmission steel plate 11 and a lower transmission flat steel plate 12: when the vertical reinforcement distribution distance of the steel mesh is 100mm, the upper transmission steel plate 11 and the lower transmission steel plate 12 are 220 mm long, 40 mm wide, and not less than 3 mm thick. of steel plates. The upper transmission force flat steel plate 11 and the lower transmission force flat steel plate 12 are respectively prefabricated at the bottom of the upper wall plate and the top of the lower wall plate in the factory. The surface layer of the concrete thin wall panel in the area of the upper force steel plate 11 and the lower force transmission steel plate 12 should reserve a groove for the connecting steel plate 15, put the connecting steel plate 15 in the reserved groove and use self-tapping screws 17 Connect it with the upper force flat steel plate 11 and the downward force flat steel plate 12 by self-tapping.

The L-shaped upper force transmission steel plate 13 and the lower force transmission steel plate 14, when the vertical reinforcement distribution spacing of the reinforcement mesh is 100mm, the upper force L-shaped steel plate 13 and the lower force transmission L-shaped steel plate 14 are equal-leg L-shaped steel plates, and their limbs are 220mm long. , Limb width 40mm, thickness not less than 3mm. The L-shaped upper force transmission steel plate 13 and the lower force transmission steel plate 14 are respectively prefabricated at the bottom of the upper wall plate and the top of the lower wall plate in the factory. The surface layer of the concrete thin wall panel in the L-shaped upper transmission steel plate 13 and the lower transmission steel plate 14 should reserve a groove 20 into which the L-shaped connecting steel plate 16 can be placed, and put the L-shaped connecting steel plate 16 into the reserved groove 20 And self-tapping screws are used to connect it with the upper force steel plate 13 and the lower force steel plate 14 by self-tapping.

One-shaped connecting steel plate 15: a rectangular steel plate with a length of 150 mm, a width of 80 mm, and a thickness of not less than 3 mm; the upper end of the one-shaped connecting steel plate 15 and the one-shaped uploading steel plate 11 are overlapped by 40 mm and then connected by self-tapping screws, and the lower end of the one-shaped connecting steel plate 15 is connected with One-shaped force transmission steel plate 12 is lapped with 40mm factory welding or on-site self-tapping screw connection. The position where the one-shaped connecting steel plate 15 passes through the self-tapping screw needs to be drilled. After the self-tapping screw is drilled into the force-transmitting steel plate, the connecting steel plate and the force-transmitting steel plate have extrusion force, friction between the steel plates, and engagement between the steel plate and the self-tapping screw. Double force transmission advantage.

L-shaped connecting steel plate 16: A right-angle equal-leg L-shaped steel plate is used, and its leg length is 150 mm, its leg width is 80 mm, and its thickness is not less than 3 mm; The lower end of the L-shaped connecting steel plate 16 is overlapped with the L-shaped lower power transmission steel plate 14 by 40mm factory welding or on-site self-tapping screw connection; the position where the L-shaped connecting steel plate 16 passes through the self-tapping screw needs to be drilled, and the self-tapping screw is drilled into the power transmission steel plate After that, the connecting steel plate and the force-transmitting steel plate have the advantages of double force transmission of extrusion force, friction force between angle steel and bite force between steel plate and self-tapping screw.

Self-tapping screw 17: ST 6.3 type hexagonal tail drill self-tapping screw can be selected. The total length of the self-tapping screw is 20mm, the thread is full length, and the distance between the self-tapping screws is generally 25mm-50mm.

Post-casting strip 18: It is a strip of post-cast concrete connection structure of the inner and outer leaf concrete sheets of the prefabricated upper and lower composite walls, and the height of the strip is 120mm to 180mm. The steel mesh of the upper and lower composite wall panels at the position of the post-casting strip 18 is overlapped here, and the concrete horizontal strip is formed after pouring fine stone concrete.

The high-performance mortar that fills the one-shaped groove 19 is high-strength mortar with a strength not lower than M15.

The high-performance mortar that fills the L-shaped groove 20 is high-strength mortar with a strength not lower than M15.

L-shaped structural dark column reinforcement 21: It is an L-shaped reinforcement cage placed between the inner leaf concrete plate 4 and the thermal insulation board 5 at the inner corner of the composite wallboard. After completion, the prefabricated steel cage 21 can be placed in the reserved L-shaped dark column position.

Structural dark column 22: It is a concrete structural column formed by placing the prefabricated steel cage 21 in the reserved L-shaped dark column position and then pouring fine stone concrete.

Wooden block 23: It is a wooden block that is pasted to the back of the upper and lower force-transmitting steel plates with glass glue and other adhesives, and its thickness is 10mm.

The method of this connection structure is as follows: (1) First, determine the layout of the building structure according to the architectural design and related planning, and determine the layout position and specific size of the assembled L-shaped sandwich thermal insulation concrete composite shear wall panels. According to the designed wall section size and material strength, the force of the wall is checked. After the wall design is completed, the structure of the wall connection nodes is designed. According to the design scheme of L-shaped composite wall panel and its assembly connection nodes, draw detailed structural structural drawings, and carry out prefabricated composite wall panel production, transportation and on-site assembly.

(2) The construction process of the combined connection structure of the self-tapping nail block and the post-casting strip of the assembled L-shaped composite wallboard is as follows: 1) Prefabricated L-shaped upper and lower concrete sheets with one-shaped and L-shaped upper and lower force-transmitting steel plates Sandwich polystyrene wallboard; 2) Apply glass glue to the inner and outer leaves of the L-shaped upper and lower composite wallboards with self-tapping nail agglomeration buttresses, and place the upper composite wallboard on the lower composite wallboard; 3 ) Insert the one-shaped and L-shaped connecting steel plates into the corresponding grooves, and use self-tapping screws to freely pass through the holes on the force-transmitting steel plates to connect the first- and L-shaped upper and lower force-transmitting steel plates; 4) Connect the connecting steel plates The grooves are smoothed with high-performance mortar; 5) The post-casting strip is poured and maintained with fine stone concrete; 6) The L-shaped hidden column reinforcement cage is placed in the L-shaped hidden column position of the composite wall, and the L-shaped hidden column is poured Fine stone concrete and maintenance; 7) stucco waterproof paint to decorate the wall panels.

The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Equivalent replacement or modification of the technical solution and its utility model concept shall be included within the protection scope of the present utility model.

Claims (5)

1. The assembled L-shaped composite wallboard self-tapping nail block and the post-casting strip combined connection structure, is characterized in that, comprises the L-shaped upper composite wallboard (1), the L-shaped lower composite wallboard (2), the outer leaf Concrete slab (4), inner leaf concrete slab (3), thermal insulation board (5), inner leaf concrete slab reinforcement mesh (6), outer leaf concrete slab reinforcement mesh (7), tie reinforcement (8), connecting plate reinforcement Reinforcing bars (9), bending steel bars (10), upper transmission one-shaped steel plate (11), lower transmission one-shaped steel plate (12), upper transmission L-shaped steel plate (13), lower transmission L-shaped steel plate (14), One-shaped connecting steel plate (15), L-shaped connecting steel plate (16), self-tapping screw (17), post-casting strip (18), one-shaped groove (19), L-shaped groove (20), L-shaped dark Column reinforcement cage (21), L-shaped hidden column (22) and wooden block (23); The inner leaf concrete slab reinforcement mesh (6), the outer leaf concrete slab reinforcement mesh (7) and the thermal insulation board (5) are connected by the tie reinforcement (8), and the outer leaf concrete of the composite wall panel is poured The panel (4) and the inner leaf concrete panel (3) of the wall panel form an L-shaped upper composite wall panel (1) and an L-shaped lower composite wall panel (2); The upper force-shaped steel plate (11) and the downward force-transmission shape steel plate (12) are welded with the vertically distributed steel bars of the inner and outer leaf reinforcement meshes of the composite wall panel, and are connected with the connecting plate reinforcing steel bars (9) and the bending steel bars ( 10) Welding to facilitate self-tapping nails to penetrate the wood block (23) of the one-shaped force-transmitting steel plate, and the upper-force one-shaped steel plate and the bottom-transmitting one-shaped steel plate are bonded by glass glue or structural glue; the upper force one-shaped steel plate (11) And the lower force-transmitting one-shaped steel plate (12) is connected by a one-shaped connecting steel plate (15) using self-tapping screws (17) to form a built-in steel structure of one-shaped self-tapping nail aggregated concrete thin wall panels; The upper-load L-shaped steel plate (13) and the lower-load L-shaped steel plate (14) are welded to the steel mesh at the corners of the outer leaf reinforcement mesh of the wall panel, and the L-shaped steel plate is welded to the connecting plate reinforcing steel bars (9) and the bending steel bars (10). , it is convenient for the self-tapping nail to penetrate the wood block (23) of the L-shaped force transmission steel plate, and the upper force L-shaped steel plate and the lower force L-shaped steel plate are bonded by glass glue or structural glue; the upper force L-shaped steel plate (13) and the lower force L-shaped steel plate The L-shaped steel plate (14) is connected to the upper L-shaped steel plate (13) and the lower L-shaped steel plate (14) through the L-shaped connecting steel plate (16) by using self-tapping screws (17). Self-tapping screws (17) are connected to form a built-in steel structure of L-shaped self-tapping screw aggregate concrete thin wall panels; The post-casting strip (18) is arranged in the middle of the post-cast concrete connection structure of the inner and outer leaf concrete sheets of the prefabricated upper and lower composite walls; An L-shaped groove (20) into which the L-shaped connecting steel plate (16) can be placed is reserved for the surface layer of the concrete thin wall panel in the area of the upper-loading L-shaped steel plate (13) and the lower-loading L-shaped steel plate (14); A one-shaped groove (19) into which a one-shaped connecting steel plate (15) is placed is reserved on the surface layer of the thin wall panel in the area of the upper-transmitting one-shaped steel plate (11) and the lower-transmitting one-shaped steel plate (12); the L-shaped dark column The steel cage (21) is placed in the position of the reserved L-shaped hidden column (22) and then the L-shaped hidden column (22) formed by pouring fine stone concrete; The insulation board (5) is made of extruded polystyrene board, polystyrene foam plastic board or phenolic foam composite board, and the surface of the insulation board (5) is provided with a dovetail groove, and the inner and outer leaf concrete boards pass through the dovetail. The groove is fully engaged with the insulation board (5). 2. The assembled L-shaped composite wallboard self-tapping nail block and post-casting strip combined connection structure according to claim 1, characterized in that, the tie bar (8) is a 135° hook on one side One end of the tie steel bar (8) with a hook is tied with the horizontal and vertical steel bar nodes of the inner leaf steel mesh and tied or welded, and the other end penetrates the composite wallboard insulation board (5) and The outer leaf reinforcement mesh nodes are welded. 3. The assembled L-shaped composite wallboard self-tapping nail block and post-casting strip combined connection structure according to claim 1, characterized in that, the connecting plate reinforcing bars (9) are composite wallboard inner and outer leaf concrete The horizontally distributed steel bars of the thin-plate reinforcement mesh, which are combined with the upper force one-shaped steel plate (11), the lower force one-shaped steel plate (12), the upper force L-shaped steel plate (13), the lower force L-shaped steel plate (13), and the lower force L-shaped steel plate (13). The shaped steel plates (14) are welded and connected. 4. The assembled L-shaped composite wallboard self-tapping nail block and post-casting strip combined connection structure according to claim 1, characterized in that the diameter of the bending steel bar (10) and the diameter of the steel mesh reinforcement Equivalently, the elbows at both ends of the bending steel bar (10) are welded to the adjacent force transmission steel plates respectively. 5. The assembled L-shaped composite wallboard self-tapping nail block and post-casting strip combined connection structure according to claim 1, characterized in that the upper force is a shaped steel plate (11), the lower force The first-shaped steel plate (12) is prefabricated on the bottom of the upper wall panel and the top of the lower wall panel, respectively, and the upper force L-shaped steel plate (13) and the lower force L-shaped steel plate (14) are prefabricated on the upper wall in the factory. The bottom of the board and the top of the lower wall board.

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