CN115162505A

CN115162505A - Key groove connected full-assembly integral building system and construction method

Info

Publication number: CN115162505A
Application number: CN202211083526.1A
Authority: CN
Inventors: 罗小勇; 程茜; 肖扬; 程俊峰; 唐伟铭; 龚永智
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2022-09-06
Filing date: 2022-09-06
Publication date: 2022-10-11

Abstract

The invention discloses a keyway-connected fully-assembled integral building system and a construction method, wherein the building system comprises a prefabricated wall body and a prefabricated floor slab which are mutually connected, the prefabricated wall body and the prefabricated floor slab are provided with keyways and sleeves through the upper and lower parts, and are filled with bonding materials to realize horizontal connection, and the prefabricated wall body and the wall body are connected and fixed through vertical keyways or groove ribs arranged on the concrete structure part of the wall body and vertical seams filled with the bonding materials; the composite floor slab and the composite wallboard are formed in an integrated factory by adopting the structure, heat preservation, heat insulation and decoration; the site construction has no cast-in-place concrete node and joint, and realizes the construction without a bracket and a template. The invention can greatly improve the construction efficiency and the quality of housing products, is convenient to install and construct, improves the production efficiency, has good structural integrity, and can be popularized and applied to multi-story and high-rise houses.

Description

Key groove connected full-assembly integral building system and construction method

Technical Field

The invention relates to the technical field of constructional engineering, in particular to a fully-assembled integral building system and a construction method.

Background

In order to respond to the requirements of green, low carbon and sustainable development of the national building industry and solve a series of problems of population aging, labor shortage and the like in the traditional building industry, a prefabricated assembly type structure system is provided, and all components of a fully-assembled building are produced in batches in factories and assembled on construction sites. The prefabricated wall body and floor are connected to the seam to the level to the full assembled wallboard structure dependence, and the adjacent prefabricated component horizontal and vertical wall body of laying is connected to vertical seam. At present, the joint form mainly comprises keyway connection, preformed hole thick liquid anchor overlap joint and sleeve grout connection, and the like, and the assembled building has the problems of complicated connection, crowded and inconvenient construction of node reinforcing bars, large cast-in-place area, insufficient prefabrication degree and the like, and the existing node is complicated in stress and weak, so that the ductility performance and the anti-seismic performance of the assembled concrete shear wall are weak.

Meanwhile, the assembly type building at the present stage is provided with corresponding templates and support systems, and concrete is poured in situ, so that the assembly is troublesome in situ; after the existing assembled external wall panel is assembled, the installation of a heat-insulating layer, a fireproof layer and a decorative layer is carried out on the external wall in a construction site, the synchronous installation of the wall body and the decorative layer cannot be realized, the construction period is prolonged, and the heat-insulating layer and the decorative layer can fall off, wear and the like due to the field construction quality problem; in the prior art, after the house is quickly assembled, secondary decoration construction including heating ventilation, water and electricity, network pipeline installation and the like is still required for the wall plates and the roof of the house, and the house cannot be built and live instantly.

Disclosure of Invention

The invention provides a fully-assembled integral building system and a construction method thereof, which are used for solving the problems that the existing assembled building system is complicated in connection, crowded in node reinforcing steel bars, inconvenient to construct, large in cast-in-place area, insufficient in prefabrication degree, dense in reinforcing steel bar arrangement, inconvenient to construct, complicated and weak in node stress, inconvenient to construct and install on site, required to be secondarily decorated and the like.

In order to solve the technical problem, the invention adopts the following technical scheme:

a key groove connected full-assembly type integral building comprises a prefabricated wall body and a prefabricated floor slab, wherein the prefabricated wall body is connected with the prefabricated floor slab through a key groove type joint, the key groove type joint comprises a groove structure B and a convex tooth structure which are respectively arranged on the prefabricated wall body and the prefabricated floor slab, and the groove structure B and the convex tooth structure are mutually matched and spliced; the prefabricated wall body and the prefabricated floor slab are mutually connected by arranging bonding materials at the matching part of the groove structure B and the convex tooth structure; the prefabricated floor slab is provided with a preformed hole, the bottom of the prefabricated wall body is provided with a sleeve, the top of the prefabricated wall body is provided with a sleeve steel bar, in the vertical direction, the sleeve steel bar of the prefabricated wall body positioned below penetrates through the preformed hole of the prefabricated floor slab and is inserted into the sleeve of the prefabricated wall body positioned above, and the prefabricated wall bodies and the prefabricated floor slab are fixedly connected by filling adhesive into the sleeves; the prefabricated wall bodies are connected with each other through hidden groove type joints arranged on the prefabricated wall bodies, the hidden groove type joints comprise groove structures A arranged on one side surface of the prefabricated wall bodies and protruding reinforcing steel bars arranged in the groove structures A, the groove structures A between different prefabricated wall bodies are matched and spliced with each other to form cavities, and the prefabricated wall bodies are connected with each other in the horizontal direction by injecting bonding materials into the cavities.

The design idea of the technical scheme is that in the vertical direction, the key groove type joint structure is arranged on the prefabricated composite wall boards, so that the prefabricated wall boards can be connected with each other by pouring concrete (setting or grouting) at the key groove type joint inosculation position, the lateral (out-of-plane) movement is limited by arranging the key grooves, the lateral shear-resistant bearing capacity is greatly improved, the lateral shear damage during construction and use is prevented, the contact area of the upper wall and the lower wall is increased, the friction and the meshing action between the upper surface and the lower surface are greatly improved, and the longitudinal (in-plane) shear-resistant bearing capacity is obviously improved; in addition, the mortar is arranged in the groove of the lower wallboard, and the extrusion effect of the convex key formed by the self weight of the upper wallboard during assembly on the flexible waterproof mortar filled in the groove is utilized, so that the mortar in the key groove is more compact, and the anti-permeability performance of the wall body is greatly improved; the upper wall steel bar and the lower wall steel bar transmit force through friction generated by the engagement between the upper wall steel bar and the lower wall steel bar and the grouting material in the sleeve, and the engagement between the grouting material and the sleeve, so that the connection between the upper wall steel bar and the lower wall steel bar is achieved, and the technical scheme can be seen that the upper wall body and the floor slab in the vertical direction are connected and fixed through various combination modes; in the horizontal direction, this technical scheme utilizes the hidden slot formula seam to realize the connection between the wallboard, compares in prior art's the connected mode of the cast-in-place seam of adoption, or compares in the connected mode of the keyway formula seam between wall body and the floor mentioned above, and this technical scheme's hidden slot formula seam is more fit for the connection between the different wall bodies on the horizontal direction: hidden slot type seam can not produce obvious seam vestige in the wall connection department on the one hand, can not destroy prefabricated wall's the whole effect of outward appearance, guarantee can carry out fitment construction immediately after wall connection, need not extra operation, on the other hand hidden slot type seam possesses better shear resistance in the horizontal direction, be favorable to improving structural strength and anti-seismic performance between the building system list layer, on the other hand hidden slot type seam need not to use the template to cast in situ again, keyway type seam can not appear yet and fill out the thick liquid difficulty in the vertical direction, inhomogeneous problem, the operation degree of difficulty has been reduced and the joint effect and the impervious performance of seam department have effectively been guaranteed. In addition, through the wallboard, the floor is in the level, the design of connected mode in the vertical direction, this technical scheme is convenient for transportation and on-the-spot assembly, wall body and floor all realize prefabricating in the mill, on-the-spot need not to assume supplementary construction such as a large amount of construction moulds or supports, only need take one's place in proper order and set up the bond in the key position to lower floor's wall body, floor and upper wallboard can realize the building of building, rely on simple and easy bearing diagonal to accomplish prefabricated wall body location installation, can effectively solve the slow prefabricated wall body of construction, prefabricated floor on-the-spot connection is inconvenient, the shortcoming that the seam quality is difficult to obtain the assurance.

Preferably, the height and the width of the convex tooth structure are smaller than those of the groove structure B, so that a seam ranging from 20mm to 30mm is reserved at the joint of the groove structure B and the convex tooth structure.

Preferably, the height of the key groove type seam is 50mm to 100mm, the width of the key groove type seam is 100mm to 150mm, and the length of the key groove type seam is the same as the length of the prefabricated wall.

As a further preferable mode of the above technical solution, the cross section of the tooth structure is rectangular or trapezoidal.

Preferably, the height of the groove structure A ranges from 50mm to 100mm, and the width ranges from 100mm to 150mm.

As a further preferred preference of the above technical scheme, a reinforcing mesh is arranged in the prefabricated wall body, and the protruding reinforcing bars and the reinforcing mesh are of an integrated structure. The ribs of the reinforcing mesh preset in the wall body in all directions are used as the protruding reinforcing bars in the hidden-groove type joint, the overlapped connection of the ribs between the prefabricated wall bodies on site is facilitated, and meanwhile, the shearing resistance of the hidden-groove type joint and the overall mechanical stability of the system are improved.

The prefabricated wall bodies are further connected with one another through key groove type joints arranged on the side faces of the prefabricated wall bodies, the key groove type joints comprise groove structures B and convex tooth structures which are respectively arranged on the surfaces of the two sides of the prefabricated wall bodies, the groove structures B and the convex tooth structures are matched and spliced with one another, and the prefabricated wall bodies are connected with one another by arranging bonding materials in cavities at the matched positions.

As a further preference of the technical scheme, the prefabricated wall body comprises a concrete structure plate A, a heat insulation layer A and a finish coat A which are sequentially connected in a superposed manner. According to the preferred scheme, the facing layer, the concrete structural slab and the heat insulation layer are integrated to form the composite prefabricated wall body, the problems of complex construction process, long construction time and the like caused by the process of firstly pouring the wall body and then laying the heat insulation layer and the facing layer on the wall body in the prior art are solved, the assembled building system of the wall body and the floor slab is combined, the technical idea of assembling and building the building on site and needing no cast-in-place process is really realized from multiple aspects, the construction time is greatly saved, and the construction efficiency is improved.

As above-mentioned technical scheme's further preferred, heat preservation A and concrete structure board A are connected fixedly through the connecting piece, the connecting piece is the goat's horn shape structure including straight portion and curved portion, the straight portion of connecting piece is fixed in the heat preservation A, the curved portion anchor of connecting piece is in concrete structure board A. The connecting piece of this structure can strengthen the tensile ability of pulling out of wallboard inside, improves the combination effect of heat preservation and concrete structure board, improves the mechanical properties and the safety in utilization of building.

As a further preferable mode of the above technical solution, the connecting member is a non-metal connecting member. The nonmetal connecting pieces adopted by the optimal scheme not only enhance the connection performance between the heat-insulating layer and the concrete structural slab, but also avoid the problem that the heat-insulating performance is reduced because the metal connecting pieces form cold and hot bridges on the prefabricated wall body.

As a further preferable mode of the above aspect, the surface of the connecting member is serrated. The connecting piece of this structure can strengthen the tensile ability of pulling out of wallboard inside, improves the combination effect of heat preservation and concrete structure board.

As a further optimization of the technical scheme, the heat insulation layer A is an inorganic material heat insulation layer or an externally-hung foam concrete layer, and the inorganic material heat insulation layer is at least one of a heat insulation mortar layer, an expanded perlite layer and a rock wool layer.

As a further optimization of the technical scheme, the decorative layer A is a coating layer.

As a further preference of the technical scheme, the precast floor slab comprises a facing layer B, a concrete structural slab B and a heat insulation layer B, wherein the concrete structural slab B and the heat insulation layer B are superposed and fixed between the two facing layers B. The composite floor slab is formed by integrating the finish coat, the concrete structural slab and the heat insulation layer, the construction process that the heat insulation layer and the finish coat are laid on the floor slab after the floor slab is poured in the prior art is improved, the assembled building system of the wall body and the floor slab is combined, the technical idea that the building is assembled and built on site without the cast-in-place process is really realized from multiple aspects, the construction time is greatly saved, and the construction efficiency is improved.

As a further preferred aspect of the above technical solution, the composite floor slab further includes a vibration isolation layer, and the vibration isolation layer is disposed between the concrete structural slab and the facing layer.

As a further preferable mode of the above technical solution, the heat insulation layer includes a concrete rib structure and foam concrete, the foam concrete is embedded in the concrete rib structure, the concrete rib structure includes side ribs and inner ribs, and the inner ribs are arranged in a criss-cross manner within a range surrounded by the side ribs. Adopt concrete rib formula structure and foam concrete as the heat preservation, utilize the structural strength of rib formula structure reinforcing heat preservation and wallboard on the one hand, on the other hand through containing a large amount of closed gas pockets, light in weight, heat preservation thermal-insulated, the good foam concrete of sound-proofing property when realizing thermal-insulated sound-proofing effect, lighten the wallboard dead weight.

Based on the same technical concept, the invention also provides a construction method of the fully-assembled building system, which comprises the following steps:

s1, determining the sizes and positions of the prefabricated wall body, the prefabricated floor slab and all components thereof according to design requirements, manufacturing corresponding templates, binding steel bars, fixing sleeves, pouring concrete, arranging a heat-insulating layer and a finish coat, and prefabricating the prefabricated wall body and the prefabricated floor slab in a factory;

s2, placing a layer of prefabricated wall on a construction foundation arranged on a construction site;

s3, connecting the layers of prefabricated walls;

s4, hoisting the prefabricated floor slab to the prefabricated wall body from top to bottom according to the positions of the preformed holes of the prefabricated wall body and the prefabricated floor slab and the position of the key groove type joint, enabling a groove structure B between the prefabricated wall body and the prefabricated floor slab to be meshed with a convex tooth structure, and carrying out mortar sitting and sealing on the joint of the key groove type joint after hoisting is completed to complete bottom layer building installation;

and S5, repeating the steps S2-S4 to install the upper-layer prefabricated wall and the upper-layer prefabricated floor slab, and finally completing installation of the fully-assembled building system.

Compared with the prior art, the invention has the advantages that:

compared with the existing sleeve grouting technology, the invention can greatly improve the construction efficiency and the residential product quality, and each component of the building system has simple structure and convenient installation and construction, thereby improving the production efficiency of the fabricated building; meanwhile, more plastic hinges can absorb energy and more shearing force and axial force transmission paths through the key grooves and the sleeve joints, the bearing capacity and the rigidity of the structure are obviously improved, and the plastic hinge joint structure can be popularized and applied to multi-story and high-rise buildings; the composite wallboard structure is prefabricated in a factory, so that the error rate is reduced, and the construction efficiency, the construction quality and the construction safety are improved; the components in the system are multifunctional decorative heat-insulation integrated wallboards, and the heat-insulation layer and the finish coat, including pipelines and the like, are synchronously installed with the structural layer of the wallboard, so that the construction period is shortened; the multi-story high-rise building system of the fully-assembled concrete composite wallboard with the key slots and the sleeve joints is a self-bearing system, only the support rods are needed to assist in fixing and assembling on site, the using amounts of scaffolds, templates and the like are greatly reduced, and the economic advantage is obvious.

Drawings

FIG. 1 is a schematic view of a building system and construction according to example 1;

FIG. 2 is a side view of a prefabricated exterior wall of the building system of example 1;

FIG. 3 is a schematic structural view of a prefabricated interior wall of the building system of example 1;

FIG. 4 is a schematic structural view of a precast floor slab of the building system of example 1;

FIG. 5 is a schematic view of a prefabricated floor insulation structure layer of the building system of example 1;

FIG. 6 is a schematic view showing the connection between the prefabricated outer transverse wall and the prefabricated outer longitudinal wall of the building system according to example 1;

fig. 7 is a schematic top view of the connection between the prefabricated outer transverse wall and the prefabricated outer longitudinal wall of the building system in the embodiment 1, wherein a is a schematic top view of the connection in the first mode, and b is a schematic top view of the connection in the second mode;

FIG. 8 is a schematic view showing the connection between the prefabricated exterior wall and the prefabricated interior wall of the building system of example 1;

FIG. 9 is a schematic top view of the connection between the prefabricated exterior wall and the prefabricated interior wall of the building system of example 1, wherein a is a schematic top view of the connection in the first manner and b is a schematic top view of the connection in the second manner;

FIG. 10 is a schematic view of the connection between prefabricated interior walls of the building system of example 1;

FIG. 11 is a schematic top view of the connection between prefabricated interior walls of the building system of example 1; wherein a is a schematic top view of connection in a first adoption mode, and b is a schematic top view of connection in a second adoption mode;

FIG. 12 is a schematic view showing the connection between the prefabricated interior wall and the prefabricated exterior wall of the building system of example 1;

FIG. 13 is a schematic top view of the connection between the prefabricated interior wall and the prefabricated exterior wall of the building system of example 1; wherein a is a schematic top view of the connection in the first mode, and b is a schematic top view of the connection in the second mode;

FIG. 14 is a schematic view showing the connection between two transverse walls or two longitudinal walls of the building system of the embodiment 1;

FIG. 15 is a top plan view of the connection of two transverse walls or two longitudinal walls of the building system of example 1; wherein a is a schematic top view of connection in a first adoption mode, and b is a schematic top view of connection in a second adoption mode;

FIG. 16 is a detail view of the horizontal joint between the prefabricated wall and the prefabricated floor slab of the building system according to embodiment 1;

FIG. 17 is a detail view of a horizontal joint between a prefabricated wall and a prefabricated ceiling slab of the building system in accordance with example 1;

fig. 18 is a comparison of the bearing capacity of the fabricated wall of different sleeve steel bar diameters of example 1 and the cast-in-place wall.

Illustration of the drawings:

1. prefabricating a composite outer shear transverse wall; 2. prefabricating a composite outer shear longitudinal wall; 3. a groove structure B; 5. a sleeve; 6. a groove structure A; 7. a convex tooth structure; 8. prefabricating a floor slab; 9. prefabricating a roof slab; 10. reserving a hole; 11. extruding the reinforcing steel bars; 12. a support bar; 13. a finishing layer A; 14. a heat-insulating layer A; 15. a concrete structural panel a; 16. a finishing layer C; 17. a heat-insulating layer C; 18. a concrete structural panel C; 19. a finishing layer B; 20. a heat-insulating layer B; 21. a concrete structural slab B; 22. sleeve steel bars; 23. a cavity A; 24. a cavity B; 25. A thin layer of concrete; 26. a vibration isolation layer; 27. prefabricating a composite inner transverse wall; 28. prefabricating a composite inner longitudinal wall; 29. a connecting member; 30. a ribbed structure; 31. an inner rib; 32. and (4) side ribs.

Detailed Description

The present invention will be described in further detail with reference to specific examples.

Example 1:

as shown in fig. 1, the fully assembled building system with sleeves and keyway joints according to this embodiment includes prefabricated walls (including a prefabricated composite outer shear transverse wall 1, a prefabricated composite outer shear longitudinal wall 2, a prefabricated composite inner transverse wall 27, and a prefabricated composite inner longitudinal wall 28), a prefabricated floor slab 8, and a prefabricated roof slab 9, which are connected to each other through keyway joints; the key groove type joint comprises a groove structure B3 and a convex tooth structure 7 which are respectively arranged on a prefabricated wall body and a prefabricated floor slab 8, the cross section of the convex tooth structure 7 is trapezoidal, the depth of the groove structure B3 is 50-100mm, the width of the groove structure B3 is 100-150mm, the groove structure B3 and the convex tooth structure 7 can be spliced with each other, a joint of 20mm is reserved at the splicing position of the groove structure B3 and the convex tooth structure 7, and the prefabricated wall body and the prefabricated floor slab 8 are mutually connected by arranging a bonding material at the matching position of the groove structure B3 and the convex tooth structure 7; the lower part of the prefabricated wall body is fixed with a sleeve 5 and is provided with a sleeve steel bar 22 which penetrates through and extends out of the whole prefabricated wall body, a preformed hole 10 which penetrates through the prefabricated floor slab 8 is formed in the prefabricated floor slab 8, the preformed hole 10 corresponds to the position of the steel bar extending out of the prefabricated wall body and is fixed with the sleeve steel bar 22, and the prefabricated wall body and the prefabricated floor slab 8 are connected and fixed through filling a bonding material into the sleeve 5.

The prefabricated wall bodies are connected with each other through key groove type joints arranged on the side surfaces of the prefabricated wall bodies, the key groove type joints comprise groove structures A6 arranged on the side surfaces of the prefabricated wall bodies and convex tooth structures 7 indicated by the side surfaces of the other prefabricated wall bodies, the groove structures A6 and the convex tooth structures 7 between different prefabricated wall bodies can be mutually matched and spliced to form cavities B24, the key groove type joints are arranged on the side surfaces of the prefabricated wall bodies and comprise groove structures A6 arranged on the side surfaces of the prefabricated wall bodies and protruding reinforcing steel bars 11 arranged in the groove structures A6, the groove structures A6 between different prefabricated wall bodies can be mutually matched and spliced to form cavities A23, and the prefabricated wall bodies are mutually connected through bonding objects arranged in the cavities B24 or A23 formed by matching and splicing the key groove type joints.

The height of the groove structure A6 is 50mm-100mm, and the width is 100 mm-150 mm.

The height and the width of the convex tooth structure 7 are both smaller than the corresponding groove structure A6.

The prefabricated wall body is a composite wall body, wherein as shown in fig. 2, the thickness of the prefabricated composite outer shear transverse wall 1 and the thickness of the prefabricated composite outer shear longitudinal wall 2 are 150mm to 200mm, the prefabricated composite outer shear transverse wall comprises a concrete structural slab A15, a heat insulation layer A14 and a decorative layer A13 which are sequentially connected in an overlapping mode, the heat insulation layer A14 and the concrete structural slab A15 are fixedly connected through a connecting piece 29, the connecting piece 29 is of a claw-shaped structure comprising a straight part and a bent part, the surface of the connecting piece is in a sawtooth shape (as shown in fig. 2), the straight part of the connecting piece 29 is fixed in the heat insulation layer A14, the bent part of the connecting piece 29 is anchored in the concrete structural slab A15, a reinforcing mesh is arranged in the concrete structural slab A15, and the protruding reinforcing steel bars 11 and the reinforcing mesh are of an integrated structure. The heat-insulating layer A14 is an inorganic material heat-insulating layer or an externally-hung foam concrete layer, and the inorganic material heat-insulating layer is at least one of a heat-insulating mortar layer, an expanded perlite layer and a rock wool layer. The veneer layer A13 is a paint layer.

As shown in fig. 3, the prefabricated composite inner transverse wall 27 and the prefabricated composite inner longitudinal wall 28 include a concrete structural slab C18 and a heat insulation layer C17 embedded and fixed in the concrete structural slab C18, the structural slab is of a side rib type and is of a square structure, the heat insulation layer C17 is made of lightweight concrete, and a facing layer C16 is arranged on an outer layer of the concrete structural slab C18.

As shown in fig. 4, the precast floor slab 8 is a composite floor slab, and includes a facing layer B19, an insulating layer B20, and a concrete structural slab B21, and the concrete structural slab B21 and the insulating layer B20 are fixed between the two facing layers B19 in a stacked manner. The prefabricated floor slab 8 further comprises a vibration isolation layer 26, and the vibration isolation layer 26 is arranged between the concrete structural slab B21 and the veneer layer B19. The concrete structural slab B21 comprises a rib structure 30 and a concrete thin layer 25, the heat preservation layer B20 is foam concrete and is embedded in the rib structure 30, wherein the concrete thin layer 25 is paved on the surfaces of the poured rib structure 30 and the heat preservation layer B20, a finishing layer B19 is paved after curing and forming, the rib structure 30 comprises a peripheral edge rib 32 and an inner rib 31 which are mutually connected, and the inner rib 31 is arranged in a criss-cross mode in the range surrounded by the edge rib 32, as shown in figure 5.

The fully assembled building system of the embodiment has no cast-in-place concrete node in site construction, does not need a template or a bracket, and only needs the supporting rod 12 to support a fixed component. All the component structures, namely heat preservation and decoration, are integrally formed and prefabricated in an assembly type factory, and the prefabricated component structures comprise wall bodies, floor slabs, water and electric heating pipeline installation spaces and auxiliary components, indoor tiling, inner and outer wall surface painting, kitchen and bathroom ceiling installation and reserved component connection professional holes, doors and windows, floors, cabinets, radiators, switch sockets, lamps, sanitary wares, curtain rods and the like, and are transported to the site by special vehicles for assembly after maintenance, decoration and cleaning.

The construction method of the fully assembled building system with the sleeve and the keyway joint comprises the following steps:

(1) Fabrication of prefabricated parts

The prefabricated wall body and the prefabricated floor slab 8 are manufactured in a factory: and (3) placing the bound reinforcement cage and the fixed sleeve 5 into a steel mould, pouring, maintaining and finishing a subsequent heat preservation layer and a decoration finish coat, so that the wall and floor structure-heat preservation-decoration integrated forming is realized. Compared with a wood mold, the steel mold has the advantages of difficult deformation, convenient installation, reutilization, beautiful appearance and the like.

The prefabricated composite outer shear transverse wall 1 and the prefabricated composite outer shear longitudinal wall 2 in the prefabricated wall body are large in opening area, and externally hung heat preservation is adopted, as shown in figure 2, the specific preparation method is as follows: the number of the reinforcing meshes is determined according to the heights and the wall thicknesses of different building structures, the reinforcing meshes are connected through connecting ribs to form a reinforcing cage, the reinforcing cage is placed in the steel formwork plate, concrete is poured afterwards, and the protruding reinforcing steel bars 11 are guaranteed to extend out of the concrete structural plate A15. The top of the serrated FRP connecting piece 29 is anchored in the concrete structural slab A15, and the serrated FRP connecting piece is rectangular and is respectively arranged in a mode of being parallel to and perpendicular to the heat-insulating layer A14 so as to enhance the anti-drawing capability of the wallboard. The veneer layer A13 adopts an external hanging method. Finish coat A13, heat preservation A14 and concrete structure board A15 closely laminate, all set up a plurality of holes that are used for connecting on finish coat A13 and the heat preservation A14, are scribbled the bar planting and are glued and be used for fixed connector 29 in the hole.

As shown in fig. 3, the prefabricated composite inner transverse wall 27 and the prefabricated composite inner longitudinal wall 28 have fewer or no holes and are in the form of edge rib laminated plates, and the specific preparation method comprises the following steps: the side ribs 32 are poured first, then the light concrete layer is poured and tamped in the frame surrounded by the side ribs 32 to form the heat preservation layer C17, and the side ribs and the heat preservation layer C17 are separately poured by using a mold clapboard and the like. And after the light concrete layer is cast and leveled, a layer of common concrete layer is poured outside, the concrete structural slab C18 and the heat insulation layer C17 of the composite inner wall are formed after maintenance, and finally, the finishing coat C16 is manufactured, so that the manufacture of the prefabricated composite inner transverse wall 27 and the prefabricated composite inner longitudinal wall 28 is completed. The thickness of the concrete structural slab C18 ranges from 150mm to 200mm; the keyway type seam is positioned on the side surface of the side rib 32, the thickness of the side rib 32 is larger than that of the keyway type seam around the wall board, the thickness of the side rib 32 in the thickness direction is 25mm to 45mm, and the thickness of the side rib 32 in the wall surface direction is 300mm to 500mm; the heat-insulating layer C17 is made of lightweight concrete such as foam concrete, ceramsite concrete, autoclaved fly ash concrete and the like, so that the self weight of the structure is reduced, the environmental pollution is reduced, and the heat-insulating property requirement can be met.

The upper and lower joints of the prefabricated wall and the prefabricated floor slab 8 are connected in a key groove type joint and sleeve 5 mode, the depth of a groove structure B3 of the key groove type joint is 50-100mm, the width of the groove structure B is 50-100mm, and a bubble film with the shriveling degree of less than 10% is pasted on a steel template in advance at a key groove type joint surface so as to ensure the roughness of the joint surface; for the inner wall, the distance between the sleeves 5 of the same size is selected to be 1/4l-1/6l (l is the length of the wall body), the sleeves are uniformly distributed in the wall, the minimum is not less than 200mm, and the maximum is not more than 800mm; for the composite outer shear wall, the composite outer shear wall is provided with windows, and sleeves 5 with the same size are arranged on two sides of each window and two ends of the composite outer shear wall. The sleeve 5 is embedded into the bottom end of the prefabricated wall body, two ends of the sleeve 5 are respectively connected with the steel reinforcement cage and the sleeve steel reinforcements 22 in the prefabricated wall body, the size of the sleeve 5 is selected according to the wall body connection strength and the diameter of the sleeve steel reinforcements 22, the sleeve 5 is selected according to the connection strength of 1/3-2/3 and the number of the sleeves 5 in the wall body, and the sleeve 5 is placed in the wall body in advance before concrete pouring.

(2) Transporting and storing prefabricated parts

And arranging a transport vehicle to be transported to a construction site after maintenance is finished and routine inspection is carried out according to relevant regulations, and making relevant transportation schemes, hoisting schemes and the like before transportation. In addition, corresponding finished product protection work is required to be done when the construction site is stacked, grouting thin tubes are adhered to the edges of the butted keyway type joints in advance, whether foreign matters are blocked in the grouting holes and the sleeves 5 or not is checked, whether the length of the grouting holes meets the design requirements or not is measured, and meanwhile, the inside of the keyway type joints is ensured to be clean and free of foreign matters.

(3) Hoisting of prefabricated parts

The hoisting and splicing sequence is as follows: prefabricate the wall body earlier then prefabricate floor 8, prefabricate the wall body and assemble from inside to outside. In the assembling process, the verticality of the wall and the levelness of the floor slab need to be controlled. And hoisting the prefabricated wall body to the upper part of the foundation extending sleeve steel bars 22 according to the position of the sleeve 5, and sequentially placing all the prefabricated wall bodies in the prepared holes 10 after the position is adjusted. The prefabricated floor slab 8 is assembled after the prefabricated wall body is assembled, and the convex tooth structure 7 at the bottom of the prefabricated floor slab 8 is in engagement with the groove structure B3 at the upper part of the prefabricated wall body in the process. And sealing the key groove type joint of the prefabricated composite wallboard after hoisting. The assembling process of the prefabricated members of the floor structures of two or more floors is completely consistent with that of the first floor. The prefabricated wall body is fixed with the help of bracing pieces 12.

(4) Prefabricated part connection

Prefabricated wall body fills special grout material through keyway formula seam and connects, and prefabricated wall body and prefabricated floor 8 adopt keyway formula seam to add grout sleeve 5 connected form. Inside sleeve 5 buried in prefabricated composite wall panel, insert sleeve 5 with the sleeve reinforcing bar 22 at lower part wall body top during the assembly, pour into the high-strength micro-expansion grout material into sleeve 5 through grout hole down until grout material from the play grout hole outflow and in time seal with the rubber buffer, treat that the grout material sclerosis can realize assembling of wall body from top to bottom after reaching the anticipated intensity. The whole process relies on the cavity A23 between grout material and groove structure A6 or and the cavity B24 between groove structure A6 and the protruding tooth structure 7 cohesively power and interlock effect realize horizontal stress transfer, rely on the grout material and the interlock effect and the cohesiveness of sleeve reinforcing bar 22 and preformed hole 10 pore wall to realize vertical stress transfer, through set up the bolt stirrup in thick liquid anchor overlap joint height range, thereby improve the horizontal binding power of node core concrete and improve the atress performance of node.

The prefabricated wall body of a plurality of directions that includes a plurality of end to end connection in proper order is assembled to wall structure.

The prefabricated composite outer shear transverse wall 1 and the prefabricated composite outer shear longitudinal wall 2 are connected as shown in fig. 6-7. There are two connection methods for the prefabricated composite wall panel, and fig. 7a shows the first connection method: the cavity a23 is formed by splicing the groove structures A6 to complete horizontal connection, and a second display mode of fig. 7b is as follows: the groove structure A6 and the convex tooth structure 7 are spliced to form a cavity B24 to complete horizontal connection. The first mode is that the prefabricated composite outer shear transverse wall 1 and the prefabricated composite outer shear longitudinal wall 2 are respectively and uniformly provided with groove structures A6 on the lateral connecting surface along the height direction, the groove structures A6 are spliced to form a cavity A23 (the transverse section is rectangular or hexagonal), and the length is 25d-45d along the wall body direction. Protruding reinforcing bars 11 extend out of the groove structure A6 respectively, the protruding reinforcing bars 11 are bound to prefabricated wall structure reinforcing bars respectively, the length of the protruding groove structure A6 ranges from 15d to 30d, the horizontal intervals of the protruding reinforcing bars 11 in the same wall are the same, and the intervals of the left protruding reinforcing bars 11 and the right protruding reinforcing bars 11 in the same height are different to prevent collision during installation. A cavity A23 with a plurality of lapped horizontal steel bars is poured by grouting material, and the prefabricated composite outer shear transverse wall 1 and the prefabricated composite outer shear longitudinal wall 2 are connected in an effective horizontal mode. The second mode is that the prefabricated composite outer transverse wall 1 is provided with a groove structure A6 along the height direction on a lateral connecting surface, the prefabricated composite outer shear longitudinal wall 2 is provided with a convex tooth structure 7 on the connecting surface uniformly, and the groove structure A6 and the convex tooth structure 7 are spliced to form a cavity B24; the key slot is arranged on the transverse wall 30-80mm away from the central axis of the longitudinal wall.

The connection of the prefabricated composite outer shear transverse wall 1 and the prefabricated composite inner longitudinal wall 28 is shown in fig. 8-9. Fig. 9a shows a first connection: groove structures A6 are uniformly arranged on the lateral connecting surface of the prefabricated composite outer shear transverse wall 1 and the prefabricated composite inner longitudinal wall 28 along the height direction, the groove structures A6 are spliced to form a cavity A23 for grouting (the transverse section is rectangular or hexagonal), and the length of the cavity A23 is 25d-45d along the direction of the wall. Fig. 9b shows the second connection mode: the prefabricated composite inner longitudinal wall 28 is provided with a groove structure A6 along the height direction on a lateral connecting surface, the prefabricated composite outer shear transverse wall 1 is provided with convex tooth structures 7 on the connecting surface uniformly, and the groove structure A6 and the convex tooth structures 7 are spliced to form a cavity B24; the key slot is arranged on the longitudinal wall 30-80mm away from the central axis of the transverse wall.

The connection of the prefabricated composite inner longitudinal walls 28 and the prefabricated composite inner transverse walls 27 is illustrated in fig. 10-11. Fig. 11a shows a first connection: the prefabricated composite inner longitudinal wall 28 and the prefabricated composite inner transverse wall 27 are respectively and uniformly provided with groove structures A6 on lateral connecting surfaces along the height direction, and the groove structures A6 are spliced to form a cavity A23 for grouting (the transverse section is rectangular or hexagonal); fig. 11b shows the second connection: the prefabricated composite inner longitudinal wall 28 is provided with convex tooth structures 7 along the height direction on lateral connecting surfaces, the prefabricated composite inner transverse wall 27 is uniformly provided with groove structures A6 on the connecting surfaces, and the groove structures A6 and the convex tooth structures 7 are spliced to form a cavity B24; the key slot is arranged on the longitudinal wall 30-80mm away from the central axis of the transverse wall.

The connection of the prefabricated composite outer shear longwall 2 and the prefabricated composite inner transverse wall 27 is shown in fig. 12-13. Fig. 13a shows a first connection: the prefabricated composite outer shear longitudinal wall 2 and the prefabricated composite inner transverse wall 27 are connected on the lateral connecting surface, groove structures A6 are respectively and uniformly arranged along the height direction, and the groove structures A6 are spliced to form a cavity A23 for grouting (the transverse section is rectangular or hexagonal); fig. 13b shows the second connection: the prefabricated composite inner transverse wall 27 is provided with a groove structure A6 along the height direction on a lateral connecting surface, the prefabricated composite outer shear longitudinal wall 2 is provided with a convex tooth structure 7 on the connecting surface uniformly, the groove structure A6 and the convex tooth structure 7 are spliced to form a cavity B24, and the connecting part is arranged at a longitudinal wall position 30-80mm away from the central axis of the transverse wall.

The connection between the two transverse walls or the two longitudinal walls is illustrated by taking the connection between the prefabricated composite inner transverse walls 27 as an example, as shown in fig. 14-15, wherein fig. 15 shows two connection modes respectively at the left and right, and fig. 15a shows a connection mode: horizontal wall 27 has respectively evenly arranged groove structure A6 along the direction of height on the face is connected in the side direction to the prefabricated compound, and groove structure A6 concatenation forms cavity A23 and is used for the grout to pour into (transverse section is rectangle or hexagon), and figure 15b demonstrates connected mode two: the prefabricated composite inner transverse wall 27 is provided with a groove structure A6 and a convex tooth structure 7 along the height direction on the lateral connecting surface, and the groove structure A6 and the convex tooth structure 7 are spliced to form a cavity B24.

The connection of the upper and lower prefabricated walls and the prefabricated floor slab 8 is shown in fig. 16. A groove structure B3 is prefabricated at the position where the prefabricated floor slab 8 is connected with the prefabricated composite outer shear longitudinal wall 2, a convex tooth structure 7 is prefabricated at the position where the prefabricated floor slab 8 is connected with the lower-layer prefabricated composite outer shear longitudinal wall 2, the convex tooth structure 7 is prefabricated on the connecting surface of the upper-layer prefabricated composite outer shear longitudinal wall 2 corresponding to the prefabricated floor slab 8, a wood plug is added to the convex tooth structure 7 of the upper-layer prefabricated composite outer shear longitudinal wall 2 to fill a notch, and a sleeve 5 with the diameter corresponding to that of the sleeve steel bar 22 is placed at the wood plug position; and a groove structure B3 is prefabricated on the connecting surface of the lower-layer prefabricated composite external shear longitudinal wall 2 corresponding to the prefabricated floor slab 8. The length of the concave part of the groove structure B3 is larger than that of the convex tooth structure 7, and the convex part is 50-100mm to form a gap. The length of the convex part of the convex tooth structure 7 is smaller than that of the groove structure B3, and the concave part is 50-100mm to form a gap. And paving special flexible waterproof setting slurry in the gap and finishing setting slurry by utilizing the self weight of the wall body.

In the manufacturing process, a PVC pipe is inserted into a position 100mm away from the outer wall edge of the prefabricated floor slab 8 (the middle part of the overlapped part of the prefabricated floor slab and the connecting wall body), a reserved hole 10 with the aperture of 40mm is reserved, and the PVC pipe is arranged along the thickness direction of the floor slab in a full-length mode. Fix the prefabricated wall body of lower floor earlier during assembly, have the reinforcing bar to stretch out in the prefabricated wall body, then hoist and mount prefabricated floor 8 and make its pvc pipe and the alignment that the prefabricated wall body of lower floor stretches out the reinforcing bar, can sit the thick liquid after accomplishing pre-assembly. And (3) hoisting the upper-layer prefabricated composite wallboard afterwards, aligning the PVC pipe extending steel bar in the prefabricated floor slab 8 with the sleeve 5 of the prefabricated wall body, ensuring that no foreign matters exist in the sleeve 5, finishing pre-assembly, then grouting and grouting, and grouting through the lower grout inlet hole until the grouting flows out from the upper grout outlet hole and is plugged by a rubber plug.

The connection of the prefabricated wall body and the prefabricated roof slab 9 is shown in fig. 17. A convex tooth structure 7 is prefabricated at the position of the prefabricated roof slab 9 connected with the upper-layer prefabricated composite outer shear longitudinal wall 2, a groove structure is prefabricated on the connecting surface of the upper-layer prefabricated composite outer shear longitudinal wall 2 corresponding to the prefabricated roof slab 9, and a sleeve 5 corresponding to the diameter of the sleeve steel bar 22 is placed at the position of the groove structure B3; the length of the convex part of the convex tooth structure 7 is less than that of the concave groove structure, and the concave part of the concave groove structure B3 is 50-100mm to form a gap. And paving special flexible waterproof setting slurry in the gap and finishing setting slurry by utilizing the self weight of the wall. The assembly of prefabricated roof board 9 is unanimous with other floor roughly, does not have the pvc pipe in the prefabricated roof board 9 and reserves the pipe, according to the requirement of anchor length, inserts sleeve reinforcing bar 22 in the roof board to there is the reinforcing bar to stretch out in dogtooth structure 7 department, aims at when hoist and mount and stretches out reinforcing bar and sleeve 5 position, after accomplishing the pre-assembly, can sit thick liquid, grout through entering grout hole down, until grout material from the play grout hole outflow, the grout sleeve 5 that fills.

The grouting material in the sleeve 5 is high-strength non-shrinkage concrete grouting material; the dowel bars at two ends of the sleeve 5 at the key groove type joint realize effective force transmission through cohesive force and occlusal force between the dowel bars and the hardened high-strength grouting material.

A seam of 20mm-30mm is reserved at the butt joint position when the key groove type seams are in butt joint;

before seat grout (grouting) is carried out at the keyway type joint of the prefabricated composite wallboard structure, water is sprayed on the surface of the prefabricated composite wallboard structure for wetting;

the flexible waterproof mortar is poured in the gap, so that the waterproof mortar has good waterproof and anti-permeability performances;

the grouting and grouting processes are kept continuous until materials on the surface overflow, bubbles are prevented from being generated in the middle, and the hoisting and splicing of the prefabricated wall body are completely finished before the initial setting of the grouting and grouting materials. And (4) maintaining after the setting and grouting are finished, performing surface press polishing after the setting and initial setting and before final setting, and performing covering maintenance by cotton cloth 2-5 hours after the grouting is finished, wherein the base is not subjected to vibration within 24 hours.

In the embodiment, the connection performance of 12 key groove type joints between walls on the same layer and 12 key groove and grouting sleeve combined joints between walls on upper and lower layers is tested; 6 joint connection forms are developed, and a low-cycle repeated load test of 15 fully-assembled concrete full-scale wall components (comprising 1 cast-in-place component) is carried out, so that the influence of different indirect reinforcing steel bar connection degrees, axial compression ratios and different joint connection forms (horizontal joints and vertical joints) on the seismic performance such as the failure mode, the bearing capacity, the rigidity attenuation and the energy consumption level of the full-scale concrete wall is discussed and compared with the cast-in-place; selecting the structure of the most unfavorable stressed part of a multi-story and high-rise building as a test substructure object, performing 1/2 substructure model static load test and pseudo-static test, discussing the failure modes, plastic deformation, rigidity and bearing capacity change of 3 seam connection forms of substructures, verifying the anti-seismic performance of different story structures of the multi-story and high-rise building, performing 1/2 reduced scale substructure vibration table test, selecting seismic waves such as Taft waves, tarzana waves and artificial waves, and verifying the integral dynamic response characteristic of the substructures connected by the 3 different seams and the anti-seismic applicability of the substructures in different anti-seismic fortification intensity area structures.

A large number of seam, structure and anti-seismic performance tests prove that: (1) All seam connections provided with key grooves have no lateral (out-of-plane) shear damage; (2) The longitudinal (in-plane) shear-resistant bearing capacity of the keyway type seam connection is 1.5-2.1 times that of the horizontal seam connection (non-keyway type general seam), the shear-resistant bearing capacity of the keyway type seam connection (the scheme disclosed in the embodiment) for increasing the auxiliary connection of the sleeve is higher, and is more than 2 times that of the single keyway type seam connection; (3) The building system structure of the embodiment has good overall performance and seismic performance, the structure is only slightly damaged under the 7-degree earthquake fortification intensity, obvious damage is avoided, the overall performance of the structure is good, stronger cooperative working capability and structural ductility are realized, and the grouting sleeve is increased, so that the ultimate bearing capacity and the structural horizontal rigidity of a fully-assembled wallboard structure can be obviously improved; (4) The seam impermeability test proves that the impermeability of the keyway seam connection is improved by more than 3 times compared with the impermeability of the common horizontal mortar setting seam connection.

Further, the embodiment also tests the influence of the diameter of the sleeve steel bar 22 in the building system on the bearing capacity of the building system, and the result is shown in fig. 18, and shows that the bearing capacity of the connection mode of the multi-bar sleeve type and the keyway type seam is far larger than that of the simple keyway type seam, and even can reach the approximate level of the bearing capacity of the cast-in-place structure (in the drawing, a less-bar sleeve means that the connection degree of the steel bar diameter is 36%, a proper bar means that the connection degree of the steel bar diameter is 70%, a more bar means that the connection degree of the steel bar diameter is 90%, and the connection degree means that the area of the sleeve steel bar accounts for the total area of the vertical steel bars of the upper and lower prefabricated wall bodies, that is, the connection degree = the area of the sleeve steel bar/the area of the cast-in-place test piece connecting steel bar).

The structural performance test and the impermeability test show that the system can be applied to multi-story high-rise building in the area with 7 degrees of seismic fortification and below.

The above are merely preferred embodiments of the present invention, and the scope of the present invention is not limited to the above-described examples. Modifications and variations that may occur to those skilled in the art without departing from the spirit and scope of the invention are to be considered as within the scope of the invention.

Claims

1. The key groove connected full-assembly integral building system is characterized by comprising a prefabricated wall body and a prefabricated floor slab (8), wherein the prefabricated wall body is connected with the prefabricated floor slab (8) through key groove type joints, each key groove type joint comprises a groove structure B (3) and a convex tooth structure (7) which are respectively arranged on the prefabricated wall body and the prefabricated floor slab (8), and the groove structures B (3) and the convex tooth structures (7) are mutually spliced and matched; the prefabricated floor slab (8) is provided with a preformed hole (10), the bottom of the prefabricated wall body is provided with a sleeve (5), the top of the prefabricated wall body is provided with a sleeve steel bar (22), the sleeve steel bar (22) of the prefabricated wall body positioned below penetrates through the preformed hole (10) of the prefabricated floor slab (8) and is inserted into the sleeve (5) of the prefabricated wall body positioned above in the vertical direction, and the prefabricated wall body and the prefabricated floor slab (8) are connected and fixed through key groove type seam matching parts and adhesive substances filled in the sleeve (5); the prefabricated walls are connected with each other through hidden-groove type joints arranged on the prefabricated walls; the hidden groove type seam comprises groove structures A (6) arranged on the side faces of the prefabricated wall body and protruding reinforcing steel bars (11) arranged in the groove structures A (6), the groove structures A (6) of different prefabricated wall bodies are mutually matched and spliced to form a cavity, and the prefabricated wall bodies are connected in the horizontal direction by injecting bonding materials into the cavity.

2. The fully assembled monolithic building system according to claim 1, wherein the height of the keyway type joint is 50mm to 100mm, the width of the keyway type joint is 100mm to 150mm, and the length of the keyway type joint is the same as the length of the prefabricated wall; the cross section of the convex tooth structure (7) is rectangular or trapezoidal.

3. A fully assembled monolithic building system according to claim 1 or 2, wherein said prefabricated wall comprises a concrete structural panel a (15), an insulating layer a (14) and a finishing layer a (13) in sequential superimposed connection.

4. The fully assembled monolithic building system according to claim 3, wherein the insulation layer A (14) and the concrete structural slab A (15) are fixedly connected through a connecting piece (29), the connecting piece (29) is a claw-shaped structure comprising a straight part and a bent part, the straight part of the connecting piece (29) is fixed in the insulation layer A (14), and the bent part of the connecting piece (29) is anchored in the concrete structural slab A (15); the surface of the connecting piece (29) is serrated.

5. The fully assembled monolithic building system according to claim 3, wherein the insulation layer A (14) is an inorganic material insulation layer or an externally-hung foam concrete layer, and the inorganic material insulation layer is at least one of an insulation mortar layer, an expanded perlite layer and a rock wool layer; the decorative layer A (13) is a coating layer.

6. The fully assembled monolithic building system according to claim 1 or 2, wherein the precast floor slab (8) comprises a facing layer B (19), a concrete structural slab B (21) and an insulating layer B (20), and the concrete structural slab B (21) and the insulating layer B (20) are fixed between the two facing layers B (19) in a superposed manner.

7. The fully assembled monolithic building system according to claim 6, wherein the precast floor slab (8) further comprises a vibration isolation layer (26), the vibration isolation layer (26) being disposed between the concrete structural slab B (21) and the insulation layer B (20); the heat-insulating layer B (20) comprises a rib structure (30) and foam concrete, the foam concrete is embedded in the rib structure (30), the rib structure (30) comprises side ribs (32) and inner ribs (31), and the inner ribs (31) are arranged in a criss-cross mode in the range surrounded by the side ribs (32).

8. A construction method applied to the fully assembled integral building system of claim 3 or 6, characterized by comprising the following steps:

s1, determining the sizes and positions of the prefabricated wall body, the prefabricated floor slab (8) and all components thereof according to design requirements, manufacturing corresponding templates, binding reinforcing steel bars, fixing sleeves (5), pouring concrete, arranging a heat-insulating layer and a finish coat, and prefabricating the prefabricated wall body and the prefabricated floor slab (8) in a factory;

s2, positioning a layer of prefabricated wall on a construction foundation arranged on a construction site;

s3, connecting the layers of prefabricated walls;

s4, hoisting the prefabricated floor slab (8) to the prefabricated wall body from top to bottom in an aligned mode according to the position of the preformed hole (10) of the prefabricated wall body and the prefabricated floor slab (8) and the position of the key groove type joint, enabling a groove structure B (3) between the prefabricated wall body and the prefabricated floor slab (8) to be matched with a convex tooth structure (7), and carrying out mortar sitting sealing on the joint of the key groove type joint after hoisting is finished to finish bottom layer building installation;

and S5, repeating the steps S2-S4 to install the upper-layer prefabricated wall body and the prefabricated floor slab (8), and finally completing installation of the fully-assembled integral building system.