CN112609867A

CN112609867A - Prefabricated shear wall cavity with three-dimensional efficient connection structure and connection node configuration

Info

Publication number: CN112609867A
Application number: CN202011509373.3A
Authority: CN
Inventors: 程松林
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-04-06

Abstract

To the design of concrete wall component connection position function, technology weak general illness, take prefabricated shear force wall cavity and the strenghthened type connection node of firm, high-efficient connection structure, its characterized in that: 1. the shear wall cavity body components are transversely connected by prefabricating spaced square holes by using side cavity ribs, prefabricating spaced reinforcing bar penetrating holes by using the side cavity ribs, additionally arranging transverse connecting reinforcing bars, and increasing the length of invisible cast-in-situ limbs of connecting nodes; 2. the vertical connection of the shear wall cavities of the upper floor and the lower floor adopts 2 prefabricated concave rings for increasing the anchoring connection on the upper end and the lower end of the inner wall of each cavity of the cavity, the anchoring connection section is provided with a transverse restraining rib, and a through cavity and a half reinforced concrete anchoring connection framework are respectively arranged in a side cavity and a non-side cavity; 3. the third dimension adopts the beard rib at the upper end of the outer cavity wall of the shear outer wall to bend into the floor structure layer and the prefabricated concave rib at the lower end of the cavity, the upper part of the ring beam of the connecting floor slab enters the concave rib, the inner wall and the outer wall form the embedding, and simultaneously, the prefabricated wall body bottom with the thickness of not less than 20mm is replaced by the cast-in-situ transverse seam.

Description

Prefabricated shear wall cavity with three-dimensional efficient connection structure and connection node configuration

Technical Field

The invention relates to the technical field of integrally assembled buildings, in particular to a prefabricated shear wall cavity and a connection node configuration which is provided with transverse and vertical structural ribs and connection ribs according to specification and structural calculation, has vertical through ribs and has a three-dimensional efficient connection structure.

Background

With the push of the prefabricated house, the technology, equipment and hardening and curing conditions of the prefabricated concrete wall body component are greatly improved. The strength, specification, reinforcing steel bar position and other indexes of the prefabricated concrete shear wall member are better than those of a shear wall cast by a formwork on site. But the integral firmness and the earthquake-resistant ductility of the installed building are not as good as those of a cast-in-situ shear wall. Therefore, the lower layers of the large-volume residential building with 8-degree earthquake resistance need to be subjected to a cast-in-place shear wall process. The long-term process practice proves that the method is the reason for the weak design shape of the transverse and vertical connecting node structure of the prefabricated shear wall component, the stress configuration of the connecting node structure, the weak process design and the micro-shrinkage of the hydration thermal expansion curing of cast-in-place concrete.

In the transverse connection design of the prefabricated wall components, if a scheme that one side is used as a cast-in-place concrete limb is adopted, the node stress is weak. In order to increase the integral firmness and the earthquake-resistant ductility of the building, the joints of the inner wall member and the outer wall member are connected by cast-in-place T-shaped columns, L short limbs and straight wall hidden columns. The specification has clear stipulations on the length of a cast-in-place limb, the occupied width of a window is removed in the middle and small-sized external wall members below 3.3m, the prefabricated inter-window wall is very narrow, and the wider the concrete post-pouring section between the prefabricated wall members is, the more prominent the shrinkage characteristics of the concrete after hydration thermal expansion and consolidation cooling are. And the factory prefabrication rate of subsequent exterior fencing and decoration processes is low.

The existing shear wall components prefabricated on upper and lower floors have weak stress function, process and construction method design of a vertical connection node structure.

The grouting sleeve and the grout anchor are basically connected by steel bars, and the earthquake resistant horizontal load cannot reach the connection level of the whole reinforced concrete structure.

The vertical connecting node design of the thermal insulation post-cast structure layer in the double-layer concrete precast slab, the thermal insulation layer soft material is arranged outside the post-cast structure layer, and the transverse constraint force of the anchoring section is insufficient.

The prefabricated hard concrete cavity bending member has a half century history in China, is a mature process, adjusts the reinforcing bar form in the member, prefabricated shear wall cavity with vertical cavity, simultaneously prefabricated three-dimensional high-efficiency structural connection structure in the cavity prefabricating link, and strengthens the structural stress configuration of three-dimensional connection nodes, is simple and easy to implement, and the cavity is lighter than a solid wall member, and the member manufacturing, enclosure and decorative layer are combined in a factory, transported and installed flexibly and safely.

Disclosure of Invention

The invention aims to: the prefabricated inner and outer wall body members with vertical through cavities, which are provided with transverse and vertical structural ribs according to the standard and structural calculation, are provided with a prefabricated shear wall cavity and a reinforced connecting node stress configuration, which are provided with a three-dimensional integrally firm and efficient structural connecting structure. Thoroughly change assembled shear wall structure building member connection function and be weak general fault, improve assembled shear wall structure residential building's whole tightness and antidetonation ductility.

The transverse high-efficiency overall structural connection of the cavity of the prefabricated shear wall is as follows:

(1) the side cavity ribs are prefabricated with square holes for connecting reinforced concrete at intervals vertically, and the side cavity ribs are prefabricated with round holes for penetrating transverse reinforcing connecting ribs;

(2) the end part of the additionally arranged cavity is transversely reinforced to connect the reinforcement bar and prewelded with an anchoring section, a side cavity rib interval square hole and a side cavity inner through cavity reinforcement cage are penetrated, and a side two-cavity rib round hole is penetrated to a side three-cavity. The middle section of the transverse reinforced connecting rib is bound with the side cavity through cavity steel bar framework, and the tail end of the transverse reinforced connecting rib is bent and connected with the tail end of the reinforcing rib of the adjacent cavity in the T-shaped column, the L-shaped short limb and the straight wall hidden column cast-in-place section. The vertical ribs in the cast-in-situ section and the conventional transverse ribs extending out of the cavity wall are structurally connected with the reinforced connecting transverse ribs, bound together and cast into concrete step by step.

(3) The length of the invisible cast-in-place limb of the transverse connecting node of the cavity shear wall member is increased (experiments prove that the lateral structural stress function of the reasonably designed quasi-shear wall is the same as that of the solid shear wall). The transverse structural connection integrity of the cavity shear wall is enhanced, the length of the invisible limb is increased, and the layout design of the prefabricated cavity row plates of the building and the composition smoothness of subsequent enclosure and decoration projects are flexible.

Vertical firm high-efficient overall structure nature of precast shear wall cavity is connected

(1) The prefabricated shear wall cavities of the upper floor and the lower floor are vertically connected, and the side cavity inner through cavity steel reinforcement frameworks of the cavities are bound and lapped; the non-edge cavity is provided with a half steel bar framework, and concrete is poured in the cavity along with the floor layer. The reinforced concrete in the side cavity is structurally connected with the reinforced concrete in the non-side cavity in an anchoring manner to jointly form a vertical firm and efficient structural connecting node of the cavity.

(2) 2 spacing concave rings for enhancing anchoring stress are prefabricated at the upper end and the lower end of the inner wall of each vertical cavity of the shear wall cavity.

(3) The bottom of the shear wall cavity is prefabricated with concave ribs which are recessed by 50mm into the cavity walls on the two sides. The concave ribs are internally provided with the upper through ribs of the ring beam of the floor slab.

(4) Inside and outside shear wall cavity limit intracavity configuration leads to chamber prewelding system framework of reinforcement, and in each floor was with position cavity limit chamber, lead to the chamber framework of reinforcement ligature overlap joint in floor upper portion limit chamber rib square hole, lead to the chamber framework of reinforcement and link up whole building height.

(5) A half steel bar framework is arranged in the non-side cavity of the shear wall cavity at the floor part, and the lower half part of the half steel bar framework penetrates into the vertical cavity at the upper end of the cavity of the lower floor; the middle section is structurally connected with the floor slab connecting ring beam, and concrete is integrally cast in the cavity step by step along with the floor slab. The upper half part of the half steel bar framework penetrates through a vertical cavity at the lower end of the cavity of the shear wall of the upper floor, concrete is poured along with the vertical cavity of the floor of the upper floor, and the half steel bar framework and the vertical structural rib of the cavity of the prefabricated shear wall form the anchoring connection of the reinforced concrete. The length of the half steel bar framework extending into the upper end and the lower end of the cavity is executed according to the standard.

(6) The upper end and the lower end of a cavity of the prefabricated shear wall, the half steel bar framework and the vertical structural ribs in the cavity are anchored in the connecting section, and special-shaped fastening stirrups are additionally arranged in the cavity wall and the cavity ribs so as to meet the requirement of increasing the transverse constraint force in the anchoring connecting section of the standard requirement.

(7) The vertical overall structure of the shear wall cavity of the upper floor and the lower floor of the inner wall and the outer wall is connected, the diameter of 4 vertical bars of the prewelding through cavity and the half steel bar framework is calculated according to the standard and the structural stress, and the diameter is reasonably increased.

And the prefabricated shear wall cavity is in a third-dimensional overall structural connection structure and in a node reinforced configuration.

The third dimension is as follows: firstly, the outer eave shear wall cavity is connected with the building in a non-vertical and transverse integral structure mode. And secondly, the cavities of the inner and outer wall shear walls are matched with non-longitudinal and transverse axial seismic waves, and oblique horizontal shear loads generated on buildings and walls are configured. And thirdly, the inner wall and outer wall cavity member is structurally embedded and fixed by the floor connecting ring beam which is heightened in the concave rib at the bottom of the cavity of the prefabricated shear wall.

(1) The outer eave shear wall is structurally connected with the building in a non-vertical and transverse mode.

The vertical structural steel bars extending out of the upper end of the outer cavity wall of the outer wall shear wall are bent into the floor slab structure layer.

And the end part of the Pi-shaped holding rib is sleeved on a reinforcing steel bar framework in the vertical cavity of the outer wall cavity on the upper part of the prefabricated layer of the laminated floor slab, and the tail end of the holding rib is connected with the floor structural rib.

The two structural connections can be selected according to the prefabrication and installation conditions of the components and the process habits.

(2) The prefabricated shear wall cavity haunch cavity ribs, oblique cross configuration double triangular ring connecting ribs and special-shaped fastening stirrups are utilized, vertical ribs in the prefabricated cavity are pulled in the ring, the constraint force of the anchoring connecting section of the prefabricated cavity is enhanced while the standard requirement is met, and oblique earthquake load horizontal shear force generated by the buildings and the wall body in response to non-longitudinal and transverse axial earthquake waves is increased.

(3) The hollow ribs at the lower end of the cavity of the prefabricated shear wall are internally provided with the through ribs at the upper part of the ring beam of the floor slab, concrete is poured along with the vertical cavity, and cast-in-situ seams which are not less than 20mm at the bottom of the prefabricated wall are replaced.

The cast-in-situ reinforced concrete net frame is integrally embedded and structurally connected with the prefabricated wall body component and the composite floor slab component

(1) And (3) arranging a through rib at the upper part of the connected floor ring beam in a concave rib at the lower end of the cavity of the prefabricated shear wall, and increasing the vertical specification of the connected floor ring beam. The floor slab connection ring beam is structurally connected with the steel reinforcement frameworks in the vertical cavities at the upper end and the lower end of the cavity. The floor connecting ring beam is communicated with the inner wall and the outer wall.

(2) Conventional transverse connecting ribs are arranged in a cast-in-place T-shaped column, an L-shaped short limb and a vertical wall hidden column at the transverse connecting node part of the cavity of the prefabricated shear wall, reinforcing connecting ribs are additionally arranged to be integrally bound with vertical ribs at the cast-in-place node part, and the reinforcing connecting ribs penetrate through a floor layer upwards and are structurally connected with a floor slab and a ring beam reinforcing steel bar. And the seedling ribs penetrate through the part above the floor slab and serve as transverse connecting joint parts of prefabricated wall components of the upper floor, and the seedling ribs of the sections are cast in situ. The prefabricated cavity components on the same floor are cast in situ with reinforced concrete nodes in the transverse direction and vertically run through the whole height of the building.

(3) The upper end and the lower end of a cavity of the prefabricated shear wall are thickened, T-shaped columns, L-shaped short limbs and straight wall embedded columns are transversely connected with the cavity, and concrete is cast step by step along with a post-cast structure layer of the laminated floor. In the calculation and standard design of a shear wall structure system, the three-dimensional efficient structural connection structure and the reinforced connection node configuration design of the prefabricated wall components are added, the transverse and vertical connection nodes of the prefabricated components are poured by using cast-in-place reinforced concrete of the reinforced node configuration design, and the prefabricated layer components of the prefabricated shear wall cavity and the composite floor slab with the triangular truss ribs are firmly and efficiently connected and embedded to form the reinforced connection floor slab grid system of the integral building.

The reinforced earthquake-resistant structure system of the large-volume shear wall assembly type residential building is constructed by the configuration design of a three-dimensional high-efficiency structural connecting structure of a floor connecting cast-in-place reinforced concrete net rack and a cavity member of a prefabricated shear wall of the whole building and a reinforced connecting node of a prefabricated member.

The reinforced earthquake-resistant structure system is designed on the premise of meeting the stress calculation and specification requirements of the existing shear wall structure, and is prefabricated and cast-in-place integrated. The system is applied to large-volume residential buildings with assembled shear wall structures, the overall firmness and the seismic ductility of the buildings can be greatly improved, and the integrated installation efficiency of the components is greatly improved. The stress flux of the prefabricated shear wall assembly type building and the connection node structure is completely overcome.

Drawings

FIG. 1 is a cross-section of a precast shear wall cavity.

FIG. 2 is a vertical section of a cavity of the outer eave prefabricated shear wall.

Fig. 3 shows a double triangular ring connecting rib in the shear wall cavity.

FIG. 4 shows the vertical connection grout anchor section special-shaped fastening stirrup in the shear wall cavity of the upper floor and the lower floor.

FIG. 5 is a shear wall cavity side elevation cavity rib configuration.

FIG. 6 is a cavity-side two-cavity rib configuration of a shear wall.

FIG. 7 is a cross-sectional node structure and arrangement of square connecting holes at the inner and outer wall joint portions of a shear wall cavity.

Fig. 8 shows the structure and arrangement of the cavity connection node at the corner of the outer wall.

FIG. 9 illustrates the connection and arrangement of the prefabricated exterior eaves wall member to the building structure.

Fig. 10 is a vertical connecting node of cavity components with different thicknesses on the upper and lower floors of an outer wall.

FIG. 11 shows the vertical connection and configuration of the different thickness cavities of the upper and lower floors of the internal structural wall at the floor.

FIG. 12 shows a shear wall cavity with vertically connected halves of a steel reinforcement cage.

Wherein:

1. the wall of the shear wall cavity;

2. shear wall cavity ribs;

3. double triangular ring connecting ribs;

4. a vertical through cavity;

5. prefabricating transverse structural ribs of the shear wall;

6. prefabricating vertical structural ribs of the shear wall;

7. the cavities are connected with each other transversely by ribs;

8. the outer cavity wall of the outer eave cavity is bent into the floor plate connecting rib;

9. a ring beam baffle plate of a floor is cast in situ at the upper end of the outer cavity wall of the outer eave cavity;

10. a connecting beam preformed hole is arranged above the door and window opening of the cavity;

11. the reinforced concrete of the inner wall of the upper end and the lower end of the vertical cavity is anchored and connected with the embedded concave ring;

12. concave ribs at the lower end of the cavity;

13. the cavity is vertically connected with a special-shaped fastening stirrup in the anchoring section;

14. the shear wall cavity side cavity rib interval reinforced concrete connects the square hole;

15. the side cavity ribs are spaced from the cavity ribs;

16. connecting bare ribs in the square holes of the side cavity ribs of the shear wall cavity;

17. the wall of the shear wall cavity;

18. two cavity ribs are arranged at the side of the cavity of the shear wall;

19. two cavity ribs on the side of the shear wall cavity transversely reinforce the connecting rib holes;

20. the transverse section of the T-shaped column is cast in situ at the position of the side cavity rib transverse reinforced concrete connecting square hole;

21. the prefabricated shear wall cavity is transversely reinforced with connecting ribs and end welding anchoring sections;

22. the prefabricated cavity is transversely connected with the invisible limb length of the side cavity part increased by the cast-in-place section;

23. the transverse structural ribs of the prefabricated cavity extend out of the beard ribs to serve as conventional connecting ribs;

24. vertical steel bars in the cast-in-place nodes;

25. a vertical through cavity steel reinforcement framework in the side cavity;

26. casting an L-shaped short limb in situ at the corner part of the outer wall;

27. welding stirrups in the cast-in-place nodes in a closed mode;

28. a half steel bar framework in a vertical cavity of the outer wall prefabricated shear wall cavity;

29. the upper end and the lower end of the shear wall prefabricated cavity are connected with the floor slab ring beam inner through ribs;

30. reinforced concrete composite floor slab;

31. the outer wall prefabricated part and the building structural connection tie bars, which can replace the upper and lower ends of the prefabricated cavity to bend into the floor slab bars;

32. a shear wall cavity member of the upper floor;

33. the cavity components of the shear walls of the upper and lower floors are vertically connected with a steel reinforcement framework;

34. a cavity member of a shear wall of a lower floor;

35. a triangular truss rib web member of a prefabricated layer of a composite floor slab;

36. the end part of the prefabricated layer of the composite floor slab extends out of a rib;

37. non-side cavity inner half steel bar cage

Detailed Description

The invention is further described in detail below with reference to the accompanying drawings:

(1) The cavity member of the reinforced concrete shear wall is produced in a mass production mode, and after the concrete member is poured and molded compactly, the inner cavity mold is drawn out before concrete is initially set, and then hardening and maintenance are carried out. The concrete cavity component is produced in large scale by adopting the configuration of dry hard fine stone concrete, prefabricated transverse and vertical structural ribs of the shear wall and a connecting rib net frame, forming a set of dies such as a connecting beam preformed hole 10 above a door and window opening of an internal mold cavity with a cavity vertical cavity 4, a rib spacing reinforced concrete connecting square hole 14 of a side cavity of the shear wall cavity, a rib penetrating hole 19 of a rib of a side cavity of the shear wall cavity and a rib penetrating hole of a side cavity of the shear wall cavity, closely forming on a vibration die table, drawing an internal cavity die, unloading a three-dimensional connecting structure die and a die side, and hanging a template with a bottom into a hardening curing kiln for curing according to rules. As shown in fig. 1, 2, 5, 6.

When the construction period, the site condition and the climate environment are met, the dry and hard concrete cavity component can be manufactured in an open site by drawing a mold, and low-energy-consumption maintenance can be performed.

(2) Preparation of reinforcing steel bar net rack in shear wall cavity

1) The reinforcing steel bar net rack in the cavity component of the shear wall, the transverse and vertical structural bars, the fastening stirrups of the additionally arranged anchoring connecting sections, the connecting bars and the connecting bars extending out of the concrete component are configured and designed according to the structural stress calculation, specification, regulation and standard of the shear wall.

2) The structural bars in the shear wall cavity component, the fastening stirrups, the high-strength thread reinforcing steel bars and the round reinforcing steel bars for the double triangular ring connecting bars are used. Various reinforcing steel bars are used according to the specification inspection and design.

3) And (3) welding the steel bars in the cavity component of the shear wall into a steel bar net rack in the shaping mold frame according to the scale marks of the steel bars in each direction. The vertical structure rib 6 of cavity, two triangular ring splice bars 3, prefabricated shear wall transverse structure muscle 5, horizontal conventional tie bar 7 between the cavity, outer eave cavity outer chamber wall bend into floor board splice bar 8, the heterotypic fastening stirrup 13 in the vertical connection anchor section of cavity, the naked muscle 16 of connection in the shear wall cavity side cavity rib square hole of each direction structure muscle, the concrete protective layer of construction muscle, hold and wrap up the layer, the interval needs accurate assurance. As shown in fig. 1, 2, 3, 4 and 5.

4) The space between transverse structural ribs in the cavity wall is strictly controlled to be not less than 120mm, the transverse structural ribs are used as the transverse structural stress steel bars of the shear wall, and the functions of no collapse, no sinking and no deformation of the newly poured concrete cavity wall of the shed frame are born when a newly formed concrete component is extracted from the vertical cavity inner mold in the manufacturing process of the steel concrete cavity.

5) The distance between the double triangular ring connecting ribs and the prefabricated vertical cavity metal inner mold is strictly controlled, and the situation that the steel bars in the newly cast concrete component are contacted and rubbed when the metal inner mold is pulled out to generate vibration and cause the steel bars to be separated from the newly cast concrete is avoided.

(3) Dry and hard concrete

1) The mass production concrete cavity prefabricated component adopts hard fine stone concrete, and the closely knit shaping of vibrations mould platform is extracted and is erected cavity internal mold, connection structure mould before the concrete initial set, unloads prefabricated cavity phantom group.

2) The strength of the dry and hard concrete is not less than C30.

3) The cement, the ballast stone, the sand and the water for the dry and hard concrete configuration are strictly executed according to the regulations, and the water-cement ratio is strictly controlled.

Shear wall cavities with three-dimensional connections require additional molds and conventional construction molds.

The steel mould with an inner cavity mould, the vibration mould table, the reinforcing steel bar net rack welding machine tool and the dry and hard concrete mixer which are required by the prefabrication of the dry and hard concrete cavity component are all conventional equipment. A shear wall cavity is in a three-dimensional efficient connection structure, and a die needs to be additionally arranged.

(1) The cavity is connected with the structural mould efficiently.

1) The cavity side mold is provided with a square hole 14 mold for connecting reinforced concrete at intervals. As shown in fig. 5.

2) The cavity rib of the cavity edge is additionally provided with a mould for penetrating a reinforcing transverse connection rib penetrating hole 19. As shown in fig. 6.

3) The cavity bottom mould is provided with a concave rib 12 mould. As shown in fig. 2.

4) The vertical cavity inner die 4 is provided with a prefabricated inner cavity wall concave ring 11. As shown in fig. 1 and 2.

(2) Shear wall cavity prefabricated conventional construction mold

1) And a steel mould 9 for a ring beam baffle plate of a continuous floor is cast in situ at the upper end of the outer cavity wall of the outer eave cavity. As shown in fig. 2.

2) A cavity bottom triangular cavity post-cast concrete compactness interval inspection hole mold and various circuit box molds.

3) The connecting beam preformed hole 10 above the cavity door and window opening is provided with a rubber ring steel mould. As shown in fig. 2.

(3) Process requires mould in cavity manufacturing

1) Prevent that the cavity centre form from floating fixture in the concrete vibrations is closely knit.

2) The upper sill and the lower sill are provided with window molds with half-section inner cavity mold holes.

Manufacturing process flow of shear wall cavity

(1) Cavity manufacturing

1) Before the cavity is manufactured, the model of a prefabricated reinforcing steel bar net rack, the upper side wall spacing holes of a steel bottom mould, an outer wall window mould, a release agent coating, safe operation regulation implementation, concrete sample reserving test block cavity mould preparation and vibration mould platform empty car starting item by item inspection are carried out.

2) A shear wall cavity reinforcing steel net rack double triangular ring connecting rib 3, a prefabricated shear wall transverse structural rib 5, a prefabricated shear wall vertical structural rib 6, a transverse connecting rib 7 between cavities and a special-shaped fastening stirrup 13 in a cavity vertical connecting and anchoring section are arranged on a steel mould, and a concrete protective layer cushion block is installed according to standard requirements. As shown in fig. 1 and 4.

3) The material distributor distributes the first hard fine stone concrete in the steel mould, and the vibration mould platform is driven to vibrate and flatten.

4) The cavity vertical cavity inner mold inserting core penetrates through the cavity upper end mold wall hole, the reinforcing steel bar net rack penetrates into the cavity lower end mold wall hole vertical through cavity 4, and the segmented groove valve 11 in the cavity at the upper end and the lower end of the cavity is pulled out. The window part is provided with a half-section inner cavity die and is penetrated by upper and lower ridge die side holes. As shown in fig. 1 and 2.

5) And (3) installing steel moulds for the steel mould side walls on two sides of the prefabricated steel concrete cavity and transversely connecting the nodes and spacing the holes. The vertical height of the upper cavity rib 15 of the side cavity rib is 140mm (the height of the cavity rib can be uniformly adjusted along with the height of a building layer), and the vertical height of the square hole 14 of the side cavity rib of the shear wall cavity is 220 mm. As shown in fig. 5.

6) The second cavity rib on two sides of the steel concrete cavity is close to the cavity wall positions on two sides, and the second cavity rib is installed with a transverse reinforcing steel bar penetrating cavity rib hole round steel piece 19 slightly divided according to the position corresponding to the square hole connected with the first cavity rib at intervals, the small end of the round steel piece with the diameter of 30mm penetrates through the square hole of the first cavity rib, and each square hole corresponds to 4 round holes. As shown in fig. 5 and 6.

7) And clamping all the cavity inner die inserting cores at the middle position of the vertical cavity die by using the inner cavity die floating-up prevention clamp.

8) And (3) mounting a steel mould for the post-pouring concrete compactness inspection hole in the cavity at the cavity wall at the lower end of the cavity, and mounting an inner cavity wall height difference steel mould 9 and a circuit socket steel mould at the upper end of the cavity when the outer eaves wall cavity is manufactured.

9) And uniformly distributing a second hard fine stone concrete on the mold insert core in the vertical cavity of the steel concrete cavity by the distributing machine, and driving the vibration mold table to vibrate and compact the concrete.

10) And (5) detaching the inner cavity upward floating prevention mold fixture.

11) The surface of the cavity is leveled by using an aluminum alloy rubbing bar and a wood trowel, an aluminum alloy slat with the thickness of 10mm and the width of 100mm is added on the cavity mould side, low cement micro-powder mixed mortar is distributed on the surface of the concrete cavity, the bar is rubbed and leveled, the surface is smoothed, and an indoor plastering mortar bottom layer is prefabricated.

12) And (3) disassembling a steel mould of the concrete compactness inspection hole, a steel mould of the circuit socket and a steel mould of the inner and outer height difference of the cavity wall after the cavity is cast. And drawing out the square hole steel module connected with the transverse reinforced concrete in the first cavity rib and pushing back the groove valve in the cavity of the inner wall mold. And (4) extracting the insert core of the inner mold of the cavity, removing the 20mm concrete at the inner bending part of the outer wall beard rib at the upper end of the outer wall reinforced concrete cavity, and removing the surrounding side mold and the window mold side of the steel mold.

(2) Hardening and maintaining of prefabricated concrete member

1) And (4) hoisting the strip steel bottom die into a heating kiln for hardening and curing.

2) The operation procedures of standing, heating, temperature holding, humidifying and cooling are strictly carried out on the concrete cavity entering the kiln.

3) And after the prefabricated concrete cavity reaches the subsequent working strength, carrying out in-factory compounding on the outer wall maintenance layer and the decorative layer.

4) And after the preparation of the steel concrete cavity is finished, the steel concrete cavity is transported to a waiting place to be arranged at intervals in the vertical grid, and the steel concrete cavity is continuously hardened and maintained.

5) And plastering the side surface of the steel-adhered mould of the steel-concrete cavity for the inner eave by cement mortar and a micro-powder agent.

Preparation before installation of steel concrete cavity

The installation of the reinforced concrete cavity relates to a systematic process of the stress performance of a reinforced concrete shear wall system structure. During the construction of engineering structure, the structural design of the transverse and vertical connecting process of the reinforced concrete cavity, the T-shaped column, the L-shaped column, the short concrete limb, the middle vertical connecting structure column and the vertical connecting structure steel bar in the vertical wall hidden column are systematically designed from the structural design of mass building foundation and reinforced concrete foundation wall.

(1) Reinforcing steel bar preparation of cavity installation procedure (without floor reinforcing steel bar)

1) The reinforcing steel bars used in the shear wall cavity mounting process are preferably prefabricated in a factory by adopting automatic equipment. The concrete shear wall structure and the construction method thereof meet relevant regulations of the existing national standard GB 50666 and the standards and regulations of the cavity shear wall technical system.

2) The reinforcing steel bars used in the installation process of the shear wall cavity are processed according to the variety, specification and process requirements given by the drawing strictly. The reinforcing steel bar preparation used in the cavity installation procedure needs to be detailed ledger according to floors, application positions, varieties, specifications, shapes, quantities, floors and sections and by taking one working surface as a unit.

3) The cavity installation procedure needs to prepare a variety of steel bars:

the side cavity of the cavity or the side cavity of the wall section is required to be reinforced by a drawing, and the steel reinforcement framework 25 of the vertical through cavity is arranged in the side cavity of the floor or the wall section. As shown in fig. 7.

The cavity is vertically connected with a half reinforcing cage at a position without a side cavity. As shown in fig. 9 and 12.

And a half reinforcing cage above the door and window opening at the cavity coupling beam part.

The cavity is internally provided with a connecting beam transverse cavity, and a transverse lintel structural steel bar group in the cavity.

Fifthly, transverse connecting parts of the cavity, vertical reinforcing steel bars 24 in cast-in-situ joints in the cast-in-situ concrete T-shaped column, the L-shaped short limb and the straight wall hidden column, stirrups, side cavity ribs and transverse reinforcing connecting ribs 21 of the side cavity ribs prefabricate cavity transverse structural ribs extending out of the beard ribs to serve as conventional connecting ribs 23. As shown in fig. 7.

And sixthly, connecting the upper end and the lower end of the shear wall prefabricated cavity of the reinforcement cage in the cavity with the floor slab ring beam inner through ribs 29 above the cavity along the wall length direction. As shown in fig. 9 and 11.

Seventhly, the outer wall cavity is connected with a third-dimensional connecting reinforcing steel bar in a pi shape with the building, and the outer wall prefabricated part is connected with the building structure by a connecting reinforcing steel bar 31. As shown in fig. 9.

4) After the reinforcing steel bars used in the cavity installation procedure are prefabricated, the reinforcing steel bars are bundled according to different application positions, varieties and numbers, and the hanging plates are separately arranged and stacked.

5) The method comprises the following steps: the distance between each side of the stirrup and the cavity wall of the reinforcement cage is not more than 3mm, the 6mm high-strength deformed steel bar is used for the stirrup, and the vertical ribs are close to the wall of the cavity of the reinforced concrete as much as possible while the vertical ribs are ensured to have complete concrete holding and wrapping layers, so that the distance between the vertical ribs in the wall thickness direction is increased.

(2) Preparation before hoisting cavity

1) The node structure of the reinforced concrete zero-layer floor slab is formed by arranging vertical seedling ribs in a cavity of a first layer of reinforced concrete in a pile foundation, a reinforced concrete foundation wall and a column; the transverse connection part of the reinforced concrete cavity is cast in situ with the vertical seedling ribs of the short limbs and the hidden column nodes of the reinforced concrete; the T-shaped column vertical seedling reinforcing steel bars at the joint part of the inner wall and the outer wall are all designed into a reinforced concrete zero-layer floor slab. The construction organization design needs special items, before the reinforced concrete foundation wall and the reinforced concrete zero-layer floor slab are poured with concrete, each group of seedling reinforcing steel bars penetrating through the zero-layer floor slab needs to be accurately measured in the longitudinal direction and the transverse direction and fixed.

2) Before the cavity is installed, a safe operation technical rule meeting the requirements of national major part hoisting rules is formulated. The installation personnel are trained and demonstrated by professional hoisting technicians, and the personnel check the qualified operation on duty.

3) The technological procedures are formulated according to different construction methods of reinforcing floor through cavity steel reinforcement cage hoisting and standard floor half steel reinforcement cage hoisting according to special needs.

4) Manufacturing a potential safety hazard protection frame welded by steel sections with enough specifications and installing a dual-purpose scaffold. And manufacturing the cavity supporting hook rod and a matched tool.

5) The two-way positioning line of the elastic cavity of the exterior wall component with the enclosure decorative base layer is arranged, and the support rod at the combination part of the cavity is arranged on the exterior wall decorative layer line.

6) Laying two sets of retarder cement paste strips under the wall of the concrete cavity or sticking an elastic sealing adhesive strip on the envelope layer of the cavity wall of the side of the equal plate close to the outer eaves, wherein the sealing strip cannot enter the wall layer of the concrete cavity.

7) And (3) pasting a sealing strip in the sealing groove at the middle part of the surrounding layer at the upper end of the isoplate cavity, and coating glue on the equal surfaces of the sealing strip.

8) The bidirectional arrangement floor layer penetrates through the seedling reinforcing steel bars in the lower cavity of the floor cavity. And erecting upper-layer straight ribs of the floor-connected ring beam along the wall length direction on the seedling rib stirrups at the position 20mm away from the surface of the floor. And is bound with the seedling rib vertical rib.

9) In the cavities with the connecting beam transverse cavities, after one cavity is fixed in the cavity, the reinforcing steel bars in the connecting beam transverse cavities are penetrated, and the checking is carried out in advance.

10) The through cavity steel bar cage in the side cavity is sleeved with the upper end of the side cavity seedling rib, the spacing cavity rib above the rib penetrating hole below the upper connecting beam hole of the side two cavity rib is in reinforced configuration and is used as a cavity hoisting point for inspection before hoisting.

11) Before the first layer of steel concrete cavity is installed, the steel concrete cavity installation construction organization design is made, and the layout design of the steel concrete cavity used for the longitudinal wall and the transverse wall of the first layer of building is carried out according to the bay and depth layout of the building picture, the arrangement size of the inner and outer bearing walls, the width specification of the prefabricated steel concrete cavity and the space of the longitudinal and transverse connection part of the steel concrete cavity. The model of the cavity corresponds to that of the drawing. Checking the number and position of the groups of the seedling steel bars at the position of the reinforced concrete zero-layer floor. When the semi-cavity plate is provided, the semi-cavity seedling ribs correspond to the semi-cavity.

And (4) transferring the layout plate and the installation sequence and the progress of the various types of steel concrete cavities to a member prefabricating factory, and transporting the steel concrete cavities to an installation site according to the plan.

Reinforced reinforcement floor node structure and configuration installation

(1) Arrangement of connection nodes

1) The 8-degree earthquake-resistant fortification of large-scale residential buildings needs to strengthen the structural stress of several layers at the lower part of the buildings according to the standard and structural stress calculation. The reinforcing ribs are arranged in the T-shaped columns at the joint parts of the inner wall and the outer wall, the L-shaped concrete short limbs at the corner parts of the building and the cast-in-situ reinforced concrete node structures of the embedded columns of the straight walls. As shown in fig. 7 and 8.

The T-shaped cast-in-place column from the root pile cap of the building to the basement extends upwards to the position of the floor given in the drawing. The lap joint of the large-diameter steel bars is welded according to the current standard and regulation. The T-shaped concrete column, the L-shaped concrete short limb and the large-diameter steel bar in the hidden column are welded and bound according to the structural design specification of the node.

(2) Prefabricated steel bar framework and steel concrete cavity installation

1) Erecting a laser instrument, and snapping a line on the concrete floor slab when the laser instrument is in an accurate position relative to the steel concrete cavity. The space and the position between the cavity wall cavity rib of the precision steel concrete cavity and each seedling rib cage are provided with an outer wall line with a surrounding and decorating functional layer.

2) And cleaning the position occupied by the steel concrete cavity on the floor slab, and finishing and cleaning the flatness of the position occupied by the bottom of the steel concrete cavity to ensure that the contact surface of the concrete floor slab and the bottom of the steel concrete cavity is smooth and free of impurities.

3) And (3) slightly drawing the upper ends of the seedling reinforcing steel bars in the wall length direction, and sequentially connecting the whole-cavity through reinforcing steel bar cage with the seedling reinforcing steel bars according to a drawing (installing the through cage in a plurality of layers of steel concrete cavities at the lower part of the building according to the drawing requirement). The length of the lap joint dislocation of the vertical steel bars is executed according to the standard. And installing transverse ribs in the concave ribs along the length direction of the wall at the bottom of the reinforced concrete cavity.

4) The steel concrete cavity is erected for installing the hands, the rows of the steel reinforcement cages need to penetrate into the cavity at the bottom of the steel concrete cavity, and the special hands for profile steel welding need to be erected, so that the safe operation is facilitated.

5) With in bank steel reinforcement cage upper portion, do the interim fixed of interval size with the aluminium pole of taking horizontal scale to steel reinforcement cage upper portion.

6) The steel concrete cavity is hoisted by using a special hoisting tool meeting the hoisting specification requirements, and the steel concrete cavity is strictly operated according to safe operation regulations in the processes of hoisting and penetrating the steel reinforcement cage in the cavity.

7) After the rows of the steel bar cages penetrate into the lower end of the cavity of the steel bar concrete cavity, the scale rods for temporarily fixing the upper parts of the steel bar cages are removed, the steel bar concrete cavity is slowly dropped to the floor slab by 200mm, the steel bar cages are in place by two lines in place, and the cavity is supported in place at one time.

8) And (3) aligning the in-place steel concrete cavity, supporting and fixing according to the rule, removing the lifting hook after the cavity is fixed, and the like.

9) The reinforcing bars are designed and configured according to the node structure of the connecting part of the reinforced concrete cavity, the reinforcing bars at the nodes of the transverse connecting part of the reinforced concrete cavity are bound, and the vertical bars at the transverse nodes of the reinforced concrete cavities of the longitudinal and transverse walls are bound with the transverse beard bars and the transverse reinforcing bars extending out of the cavity. T-shaped column vertical ribs at the junctions of the inner eave wall and the outer eave wall and concrete short-limb vertical ribs at the corner parts of the building. The vertical ribs of the vertical wall embedded columns and the reinforcement cage of each vertical cavity penetrate through the upper concrete floor and are structurally connected with the floor ribs. And (4) casting the seedling reinforcing steel bars of the reinforced concrete node structure on the horizontal and vertical connection parts of the upper layer of the reinforced concrete cavity. And (5) forming a steel mould at the transverse connection part of the supporting reinforced concrete cavity.

10) And (3) sealing the concrete compactness inspection hole at the lower end of the reinforced concrete cavity by using a steel mould.

11) After the prefabricated layer of the laminated floor slab is installed, the beard ribs at the upper end of the cavity of the steel concrete cavity of the outer wall are bent into the position of the post-cast structural layer of the floor slab, or the steel bar cage holding ribs of the outer wall are installed, and the steel bar cage and floor slab ring beam transverse ribs at the upper end of the steel concrete cavity are penetrated. The vertical ribs at the transverse joints of the wall are connected with the floor slab reinforcing steel bars. And pouring concrete integrally and step by step according to the reinforced concrete pouring operation rules and standards. Before concrete floor slabs of each floor are poured, all groups of seedling reinforcing steel bars penetrating through the cast-in-place floor slabs need to be accurately positioned in the longitudinal and transverse directions and fixed.

12) The strength of the cast-in-situ concrete at the cavity connecting part is not less than C30.

Standard floor cavity connecting node configuration installation

(1) Standard floor connecting node configuration preparation

1) The cavity of the standard floor is vertically connected, the side cavity of the internal and external structure walls is matched with the cavity steel reinforcement framework 25, and the non-side cavity is matched with the half steel reinforcement framework 37. As in fig. 12.

2) The steel reinforcement framework at the vertical connecting part of the standard floor is prepared, and the used variety, specification and concrete strength are strictly operated according to a structure diagram and regulations.

(2) Standard floor shear wall cavity installation

1) The standard floor cavity installation procedure and steps are the same as those of the reinforced floor (except that the cavity is vertically connected).

2) After a prefabricated layer of a composite floor slab or a formwork of a cast-in-place floor slab is installed, a lower through rib of a ring beam of a connecting floor slab penetrates through the middle part of the half steel reinforcement framework, the lower half part of the half steel reinforcement framework is inserted into an upper vertical cavity of the cavity, and the half steel reinforcement framework is supported on a rib of the upper cavity of the wall body by the lower through rib of the ring beam. The middle section of the half steel bar framework is structurally connected with the steel bar of the ring beam of the floor connecting plate, and the upper half part of the half steel bar framework penetrates into the vertical cavity at the lower end of the cavity of the upper floor to serve as a steel bar for anchoring and connecting the vertical steel bar concrete of the cavity. As shown in fig. 11 and 12.

3) The cavity reinforcing bar that leads to of wall cavity limit intracavity in the standard floor penetrates from cavity upper end limit chamber and erects the chamber, with the seedling muscle suit that floor upper portion stretches out, from limit chamber interval hole ligature overlap joint, passes even floor girt logical muscle in the cavity reinforcing bar skeleton is led to the floor position, makes structural connection. The upper end of the through cavity steel bar framework penetrates through the floor layer to serve as a seedling rib of the upper floor in the cavity side cavity at the same position and the through cavity steel bar framework in vertical connection. Concrete is poured in the vertical cavity of the cavity step by step along with the floor layer. As shown in fig. 10, 9 and 12.

The shear wall cavity is vertically connected with the upper and lower floors, and is configured by a through cavity steel reinforcement framework in a side cavity and a half steel reinforcement framework in a non-side cavity and post-cast concrete in the cavity, the steel reinforcement frameworks in the side cavity are structurally connected, the steel reinforcement frameworks in the non-side cavity are anchored and connected, and the shear wall members of the upper and lower floors are jointly constructed into efficient integral structural connection at the floor slab part. As shown in fig. 10 and 12.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.

Claims

1. Take three-dimentional to the prefabricated shear force wall cavity and the configuration of connection node of high-efficient connection structure, its characterized in that:

(1) prefabricating spaced reinforced concrete connecting square holes on side cavity ribs of the cavity body component of the shear wall, prefabricating circular holes or round-corner square holes penetrating through transverse reinforcing connecting reinforced concrete in the side cavity;

(2) the transverse reinforced connecting steel bars of the end pre-welded anchoring section penetrate through the side cavity rib square holes and the side cavity inner through cavity steel bar framework and pass through the side cavity round holes to the side cavity ribs; the middle section of the transverse reinforcing rib is bound and connected with a through cavity steel bar framework in the side cavity, and the tail end of the transverse reinforcing rib is bent and connected with the tail end of the reinforcing transverse rib of the adjacent cavity in the T-shaped column, the L-shaped short limb and the straight wall hidden column cast-in-situ section; the vertical bar in the cast-in-situ section and the cavity wall extend out of the conventional transverse bar to be structurally connected with the reinforced connecting transverse bar, and the concrete is cast; the length of the invisible cast-in-situ limb at the transverse connecting node part of the wall body member is increased, and the common problem of weakening the stress function of the shear wall structure by the vertical joint process of prefabricated concrete wall body member transverse connection in the assembled shear wall structure is solved.

2. Take three-dimentional to the prefabricated shear force wall cavity and the configuration of connection node of high-efficient connection structure, its characterized in that: the prefabricated shear wall cavity components of the upper floor and the lower floor are vertically connected at the floor slab part, and a reinforcement cage with a communicated cavity in a side cavity is adopted;

(1) 2 spacing concave rings with reinforced concrete anchoring and connecting functions are prefabricated on the inner walls of the vertical cavities at the upper end and the lower end of the shear wall cavity;

(2) the side cavity of the shear wall cavity is internally provided with a through cavity steel bar framework, the through cavity steel bar frameworks in the side cavities of the inner wall cavity and the outer wall cavity at the same part of each floor are overlapped at the upper part of the floor according to the specification, and are bound in the rib square holes of the side cavity to penetrate through the side cavity of each floor in the vertical direction of the whole building; half reinforcing steel bar frameworks are arranged in each non-side cavity of the floor slab part, and concrete is integrally cast in each vertical cavity along with the floor; the side cavity and the non-side cavity are vertically connected and configured to combine the cavity components of the inner and outer wall shear walls of the upper and lower floors into a vertical connection with high-efficiency structural stress;

(3) the bottom of the shear wall cavity is prefabricated with concave ribs, and the space of the concave ribs is internally provided with a through rib which is connected with the upper part of the floor slab ring beam along the length direction of the wall, so that the invisible height of the ring beam structure is increased; the steel reinforcement framework in the shear wall cavity is structurally connected with the steel reinforcement of the floor slab-connected ring beam; the concrete is cast in a whole way in different floors, and the inner and outer prefabricated shear wall cavities are connected with the enlarged ring beam of the floor slab in an integral structure;

(4) the enlarged ring beam steel bars of the floor connecting plate under the concave ribs of the inner wall and the outer wall are structurally connected with the vertical steel bars of the T-shaped column, the L-shaped short limb and the vertical wall hidden column at the transverse connecting part of the cavity of the prefabricated shear wall, concrete is cast in situ, and an enlarged cast-in-situ reinforced concrete net rack design is designed in the prefabricated and cast-in-situ integrated shear wall structure building; the integral firmness and the earthquake-resistant ductility of the building structure are enhanced; meanwhile, the specification is finished, and the requirement on integral embedding of the prefabricated wall body component is met;

(5) in the anchoring sections at the upper end and the lower end of the cavity of the prefabricated shear wall, special-shaped horizontal constraint stirrups are additionally arranged to strengthen the vertical connecting part of the cavity and constrain stress under the action of earthquake extreme load.

3. The prefabricated shear wall cavity with the three-dimensional efficient connection structure and the connection node configuration are characterized in that,

(1) the external wall shear wall member and the building are structurally connected in two modes, and one mode is selected according to the prefabrication working condition and the installation process habit;

A. vertical structural ribs on the outer cavity wall of the outer wall shear wall extend out from the upper end, and the extending vertical ribs are bent into the floor slab structural layer in the cavity installation and connected with the floor slab ribs;

B. connecting by using n-shaped holding ribs, sleeving a reinforcement framework in the vertical cavity of the outer wall cavity by using the n-shaped bars, wherein the vertical reinforcements do not extend out of the upper end of the outer wall cavity wall of the outer wall at the floor slab part, and the tail parts of the holding ribs are connected with structural reinforcements of the floor slab;

(2) the special-shaped stirrups and the double triangular ring connecting reinforcements in the cavity body are used for seizing cavity body vertical reinforcements, are obliquely and crossly arranged in cavity ribs, have restraint and connection functions, and are used for dealing with horizontal seismic loads generated by non-longitudinal and transverse axial seismic sources, obliquely shearing force is applied to buildings and wall body components, and the seismic resistance of the buildings and the wall body components is improved;

(3) and the prefabricated shear wall cavity is embedded and fixed in the third dimension in the upper part of the floor slab connected ring beam entering the concave ribs at the bottom of the prefabricated shear wall cavity, and a cast-in-situ transverse seam which is not less than 20mm at the bottom of the prefabricated wall body is replaced.