Connecting joint of multi-layer prefabricated dense rib shear wall and combined hollow floor slab
By using multi-layer prefabricated dense rib shear walls and combined hollow floor slabs to connect nodes in high-rise structures, the stable connection between the overlapping floor slabs and the shear wall is achieved by using connecting steel bars and angle steel embedded parts, which solves the problem of difficulty in achieving connection in the prior art and improves the stability and strength of the connection.
Patent Information
- Application Number
- CN202421770764.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-25
AI Technical Summary
In the prior art, it is difficult to achieve stable connection between the overlapping floor slabs and the middle part of the shear wall in a high-rise structure, and it is impossible to directly follow the existing connection method.
Multi-layer prefabricated dense rib shear walls are used to connect nodes with combined hollow floor slabs. By pre-embedding the steel bars and angle steel embedded parts on the shear wall, reserved holes and bolts are set on the floor slabs, and stable connection between the floor slabs and the angle steel embedded parts is achieved by connecting the steel bars and angle steel embedded parts.
It realizes efficient and high-performance floor slabs and shear wall connections, simplifies on-site operation, saves formwork production and support materials, and improves the stability and strength of the connection.
Smart Images
Figure CN222835154U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of assembled buildings, in particular to a connection node between a multi-layer prefabricated dense-rib shear wall and a combined hollow floor slab. Background Art
[0002] At present, prefabricated buildings usually refer to buildings assembled from prefabricated components on the construction site. Among them, prefabricated buildings can be divided into fully prefabricated buildings and prefabricated integral buildings. Prefabricated integral buildings are more common at present. Taking prefabricated integral buildings as an example, the most commonly used prefabricated components in current prefabricated buildings include prefabricated load-bearing wall panels, non-load-bearing wall panels hanging under prefabricated beams, floor slabs, prefabricated beams, prefabricated stairs, prefabricated balconies and prefabricated air-conditioning panels. As we all know, the core problem of prefabricated buildings is how to connect these prefabricated components produced and processed by the workshop into one. Among them, the interlayer connection nodes of the wall, that is, the connection between the upper and lower wall panels and the connection between the wall panels and the floor slabs are particularly important. In frame structures, "shear walls" are often used as walls. Floor Cover: A general term for components composed of floor covers, secondary beams and main beams between floors of a house that are used to withstand various floor effects. Among them, composite floor covers are the most commonly used floor cover system. They adopt the method of pre-embedded steel trusses on the bottom plate of precast concrete composite floor covers. After the composite floor covers are laid on site, a certain thickness of cast-in-place concrete is poured on the bottom plate to form a composite floor cover that is subjected to overall stress.
[0003] For the composite floor slabs widely used in high-rise structures, which can reach 2-3 times the height of the house, some floor slabs need to be connected in the middle. Currently, most of them are connected by cast-in-place method. However, the middle connection between the floor slab and the wall is different from the end connection. The method of first connecting the steel bars on site and then casting the floor slab and shear wall concrete as a whole is adopted. The connection method of prefabricated shear wall and floor slab is not considered, and the existing connection method cannot be directly used. It is impossible to achieve a stable connection through cast-in-place method. Utility Model Content
[0004] The utility model aims to provide a connection node between a multi-layer prefabricated dense-rib shear wall and a combined hollow floor slab, so as to solve the technical problems existing in the prior art.
[0005] In order to solve the above technical problems, the utility model provides a multi-layer prefabricated ribbed shear wall and combined hollow floor connection node, including a shear wall, connecting steel bars, a composite floor, angle steel embedded parts, and bolts;
[0006] The angle steel embedded parts are arranged on the shear wall;
[0007] The composite floor slab is arranged on the angle steel embedded parts for installation and positioning;
[0008] The connecting steel bars are pre-buried in the shear wall;
[0009] The studs are arranged on the angle steel embedded parts;
[0010] The composite floor slab includes top steel bars, bottom steel bars, and reserved holes;
[0011] The connecting steel bars are bundled and overlapped with the steel bars on the top of the slab by extending out of the shear wall, and the reserved holes are inserted with studs, so that the composite floor slab is stably connected to the shear wall through the studs and / or the connecting steel bars.
[0012] Furthermore, the shear wall comprises a wall body, transverse ribs, and longitudinal ribs;
[0013] The transverse ribs are laid on the wall along the length direction;
[0014] The longitudinal ribs are laid on the wall along the height direction;
[0015] Connecting steel bars are pre-embedded on the transverse ribs and the longitudinal ribs.
[0016] Furthermore, the angle steel embedded parts are arranged below the transverse ribs, and the composite floor slab is arranged in the middle of the shear wall through the angle steel embedded parts.
[0017] Furthermore, the reserved holes are arranged at the bottom of the composite floor slab, the bolts are inserted into the reserved holes, and the bottom of the composite floor slab is limited on the shear wall by the bolts and the reserved holes.
[0018] Furthermore, the connecting steel bars include a plurality of fixed steel bars and a plurality of stirrups, the fixed steel bars are laid on the transverse ribs along the length direction, and the stirrups are arranged on the outside of the fixed steel bars to bind them.
[0019] Furthermore, it also includes additional steel bars, which are laid on the upper side of the fixed steel bars. The stirrups are wrapped around the fixed steel bars, bent upward and tied to the additional steel bars. The ends of the stirrups on the additional steel bars extend to the outside of the transverse ribs, overlap the slab top steel bars and are tied.
[0020] Furthermore, it also includes a cast-in-place composite layer, which is cast on the composite floor slab, so that the composite floor slab and the shear wall form a whole.
[0021] Furthermore, it also includes an anchoring end arranged at the end of the stirrup, which is used to improve the anchoring strength of the composite floor.
[0022] Furthermore, the ends of the stirrups are bent downward to form anchoring ends, and the anchoring ends are reinforced with concrete, thereby improving the anchoring strength of the composite floor slab.
[0023] Furthermore, the diameter of the reserved hole is twice the diameter of the bolt to avoid installation problems caused by construction errors.
[0024] In another embodiment, the utility model provides a multi-layer prefabricated dense-rib shear wall and a composite hollow floor slab connection node, further comprising a reserved space, the reserved space being arranged above the transverse rib, and the end of the composite floor slab extending into the reserved space;
[0025] The connecting steel bars in the transverse ribs extend upward and are bent to overlap the top steel bars and the bottom steel bars of the slab, and then are tied and fixed.
[0026] Furthermore, the angle steel embedded parts are arranged above the transverse ribs, and the composite floor slab is overlapped at the middle part of the shear wall through the angle steel embedded parts.
[0027] Furthermore, the reserved space has the same thickness as the composite floor slab.
[0028] Furthermore, the reserved space is larger than the thickness of the composite floor slab, which is convenient for steel bar binding.
[0029] Furthermore, the cast-in-place composite layer is sequentially filled in the reserved space and the composite floor slab.
[0030] Furthermore, the slab top steel bars located in the reserved space are bent downward into a hook shape, and the shear wall and the composite floor slab are anchored through the cast-in-place composite layer to increase the anchoring strength.
[0031] Furthermore, it also includes a steel mesh arranged on the shear wall, wherein the steel mesh is arranged at one end of the shear wall away from the composite floor slab and is used for structural reinforcement of the shear wall.
[0032] Furthermore, the cast-in-place composite layer is a cast-in-place concrete layer.
[0033] Furthermore, it comprises a lightweight filling body arranged on the shear wall, wherein the transverse ribs and the longitudinal ribs on the shear wall form a plurality of cavities, and the cavities are filled with the lightweight filling body, which has the effects of light weight, waterproofness, sound insulation and heat preservation.
[0034] By adopting the above technical solution, the utility model has the following beneficial effects:
[0035] The utility model provides a connection node between a multi-layer prefabricated dense-ribbed shear wall and a composite hollow floor slab. On the basis of the traditional composite structure shear wall-cast-in-place floor slab connection, the connection method is optimized so that it can be expanded and applied to the connection node between a multi-layer prefabricated dense-ribbed shear wall and a steel-concrete composite composite floor slab. Through the extended connecting steel bars and the embedded angle steel connectors, an efficient and high-performance connection of the floor slab ends is achieved.
[0036] The utility model provides a multi-layer prefabricated dense-rib shear wall and combined hollow floor slab connection node, most of the components required for the connection (such as connecting steel bars, angle steel embedded parts, bolts, etc.) are prefabricated in the factory, and only the steel bars need to be overlapped and connected and concrete poured on site, and the on-site operation is simple.
[0037] The utility model provides a multi-layer prefabricated dense-rib shear wall and a combined hollow floor slab connection node. The transverse ribs of the shear wall and the bottom plate of the composite floor slab can serve as templates, saving on-site template production and installation time. At the same time, the ribs and the bottom plate have greater rigidity and require less support, saving template support installation time and material costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0038] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0039] Figure 1 A steel bar arrangement diagram of a shear wall in a connection node between a multi-layer prefabricated ribbed shear wall and a composite hollow floor slab provided in an embodiment of the utility model;
[0040] Figure 2 for Figure 1 A cross-sectional view of a connection node between a multi-layer prefabricated ribbed shear wall and a composite hollow-core floor slab in the AA direction is shown;
[0041] Figure 3 A schematic diagram of a connection node between a multi-layer prefabricated dense-rib shear wall and a composite hollow floor slab provided in Example 1 of the utility model;
[0042] Figure 4 A schematic diagram of the arrangement of the connecting steel bars and angle steel embedded parts in a connection node of a multi-layer prefabricated dense-rib shear wall and a combined hollow floor slab provided in Example 1 of the utility model;
[0043] Figure 5 A schematic diagram of setting a reserved space in a connection node between a multi-layer prefabricated dense-rib shear wall and a composite hollow floor slab provided in Example 2 of the utility model;
[0044] Figure 6 A schematic diagram of a connection node between a multi-layer prefabricated dense-rib shear wall and a composite hollow floor slab provided in Example 2 of the utility model;
[0045] Figure 7A schematic diagram of the arrangement of reserved space and angle steel embedded parts in a connection node between a multi-layer prefabricated dense-rib shear wall and a combined hollow floor slab provided in Example 2 of the utility model.
[0046] Reference numerals:
[0047] 100-shear wall, 110-transverse ribs, 120-longitudinal ribs, 130-lightweight filling body, 140-steel mesh, 200-connecting steel bars, 210-fixed steel bars, 220-hoops, 230-additional steel bars, 240-anchor end, 300-composite floor slab, 310-top steel bars, 320-bottom steel bars, 330-reserved holes, 400-angle steel embedded parts, 500-studs, 600-reserved space, 700-cast-in-place composite layer. DETAILED DESCRIPTION
[0048] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0049] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0051] The present invention will be further explained below in conjunction with specific implementation methods.
[0052] Example 1
[0053] like Figure 1-4As shown, the present embodiment provides a multi-layer prefabricated dense-rib shear wall and composite hollow floor connection node, including a shear wall 100, connecting steel bars 200, a composite floor 300, an angle steel embedded part 400, and a stud 500; the angle steel embedded part 400 is arranged on the shear wall 100; the composite floor 300 is arranged on the angle steel embedded part 400 for installation and positioning; the connecting steel bars 200 are embedded in the shear wall 100; the stud 500 is arranged on the angle steel embedded part 400; the composite floor 300 includes a top steel bar 310, a bottom steel bar 320, and a reserved hole 330; the connecting steel bar 200 is bundled and overlapped with the top steel bar 310 by extending out of the shear wall 100, and the stud 500 is inserted into the reserved hole 330, so that the composite floor 300 is stably connected to the shear wall 100 through the stud 500 and / or the connecting steel bar 200.
[0054] The present application realizes a stable connection between the composite floor 300 and the shear wall 100 through bolts 500 and connecting steel bars 200, breaking through the shortcomings of the node connection of this type of wall. The steel bar overlap method resists the negative bending moment at the node, giving full play to the advantages of the efficient and fast prefabricated structural system and the characteristics of the cast-in-place concrete structure with strong integrity and good mechanical properties, and has a broad application space in multi-story structures.
[0055] In this embodiment, the shear wall 100 includes a wall body, transverse ribs 110, and longitudinal ribs 120; the transverse ribs 110 are laid on the wall body along the length direction; the longitudinal ribs 120 are laid on the wall body along the height direction; and connecting steel bars 200 are pre-embedded on the transverse ribs 110 and the longitudinal ribs 120. The transverse ribs 110 and the longitudinal ribs 120 are vertically arranged to divide the wall into several cavities, each of which is filled with a lightweight filler 130, which has the effects of light weight, waterproofness, sound insulation and heat preservation, and is also convenient for lifting; in addition, the shear wall 100 is paved with a steel mesh 140 at the end away from the node to strengthen the overall structure of the shear wall 100. Since the dense rib wall is a multi-layer prefabricated shear wall 100, the wall height can usually reach 2 to 3 times the floor height of the house. For this reason, the shear wall 100 in the present application is composed of a multi-layer structure of steel mesh 140, transverse ribs 110, longitudinal ribs 120, and a lightweight filling layer. A concrete layer is poured between each layer of the structure to reinforce the structure of the shear wall 100, so that the overall structure is strengthened.
[0056] The present application is more suitable for high-rise buildings. Part of the composite floor 300 is connected to the end of the wall, and the other part of the composite floor 300 is connected to the middle of the shear wall 100. For the middle connection, the present application improves its connection method based on the existing technology, solves the disadvantages of using cast-in-place connection, and realizes the stable coupling of the cast-in-place part and the prefabricated part.
[0057] In this embodiment, the angle steel embedded part 400 is fixed to the shear wall 100 by high-strength screws and is located below the transverse rib 110. The angle steel embedded part 400 supports the composite floor 300 and is arranged in the middle of the shear wall 100. The reserved hole 330 is arranged at the bottom of the composite floor 300, and the stud 500 is inserted into the reserved hole 330. The bottom of the composite floor 300 is limited on the shear wall 100 by the stud 500 and the reserved hole 330.
[0058] In this embodiment, the connecting steel bar 200 includes a plurality of fixed steel bars 210 and a plurality of stirrups 220. The fixed steel bars 210 are laid on the transverse ribs 110 along the length direction, and the stirrups 220 are arranged outside the fixed steel bars 210 to bind them. It also includes additional steel bars 230, which are laid on the upper side of the fixed steel bars 210. The stirrups 220 wrap around the fixed steel bars 210, bind them, bend upward, and bind the additional steel bars 230. The ends of the stirrups 220 on the additional steel bars 230 extend to the outside of the transverse ribs 110, overlap and bind the top steel bars 310 of the slab, and are bound. The top of the composite floor slab 300 is limited to the shear wall 100 by the extended stirrups 220 and the top steel bars 310. The stirrups 220 can be rectangular stirrups 220 or spiral stirrups 220. The stirrups 220 play a restraining role between the shear wall 100 and the composite floor slab 300, thereby improving the connection strength between the two.
[0059] In this embodiment, a reserved hole 330 is provided on the bottom plate of the composite floor 300, and the diameter of the reserved hole 330 is preferably twice the diameter of the bolt 500 to avoid installation problems caused by construction errors. When the composite floor 300 is placed on the angle steel embedded part 400, the bottom plate steel bar 320 is laid on the bottom plate of the composite floor 300 and tied tightly, and a cast-in-place composite layer 700 is cast on the bottom plate steel bar 320. The cast-in-place composite layer 700 is preferably a cast-in-place concrete layer. The top plate steel bar 310 is laid on the concrete layer and tied with the stirrup 220. [a1] On the basis of the node connection, the cast-in-place composite layer 700 forms a whole with the composite floor 300 and the shear wall 100, and the connection is more stable.
[0060] In this embodiment, the end of the stirrup 220 is bent downward to form an anchoring end 240 , and the anchoring end 240 is reinforced with concrete, thereby improving the anchoring strength of the composite floor slab 300 .
[0061] In this embodiment, the transverse ribs 110 of the shear wall 100 and the bottom plate of the composite floor 300 can serve as formwork, saving on-site formwork production and installation time. At the same time, the ribs and the bottom plate have greater rigidity and require less support, saving formwork support installation time and material costs.
[0062] In this embodiment, the steel bar binding involved in this application can be one or more of manual wire binding, welding binding, steel bar connecting sleeve binding, and steel fastener binding.
[0063] In this embodiment, the extension length of the connecting steel bar 200 needs to be greater than the steel bar lap length specified in the "Code for Design of Concrete Structures" GB50010 to ensure a firm connection; the size, quantity, spacing and other requirements of the bolts 500 should comply with the relevant provisions of the "Code for Design of Composite Structures" JGJ138.
[0064] Example 2
[0065] This embodiment is basically the same as Embodiment 1, except that:
[0066] like Figure 5-7 As shown, in this embodiment, a reserved space 600 is set above the transverse rib 110, and the end of the composite floor 300 extends into the reserved space 600. The connecting steel bars 200 in the transverse rib 110 extend upward and bend to overlap the top steel bars 310 and the bottom steel bars 320, and then are tied and fixed. An angle steel embedded part 400 is set above the transverse rib 110, and the composite floor 300 is overlapped at the middle of the shear wall 100 through the angle steel embedded part 400. The size of the reserved space 600 is set to be the same as or greater than the thickness of the composite floor 300, which is more convenient for steel bar tying.
[0067] In this embodiment, the cast-in-place composite layer 700 is cast in the composite floor 300 and the reserved space 600. The cast-in-place composite layer 700 makes the composite floor 300 and the shear wall 100 become a whole, and the connection is more firm.
[0068] In this embodiment, the thickness of the shear wall 100 is relatively thin (about 200 mm), and the anchorage length is insufficient. After the top plate steel bar 310 penetrates into the wall, its end is bent into a hook shape to shorten the specified anchorage length, increase the friction between the steel bar and the concrete, and improve the anchorage strength. In addition, after the top plate steel bar 310 is bent at both ends, the straight section in the middle is at least 12 times the diameter of a single top plate steel bar 310.
[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A connection node between a multi-layer prefabricated ribbed shear wall and a composite hollow floor slab, characterized in that: It includes a shear wall (100), connecting steel bars (200), a composite floor slab (300), an angle steel embedded part (400), and studs (500); The angle steel embedded part (400) is arranged on the shear wall (100); The composite floor slab (300) is arranged on the angle steel embedded part (400) for installation and positioning; The connecting steel bars (200) are pre-buried on the shear wall (100); The bolt (500) is arranged on the angle steel embedded part (400); The composite floor slab (300) comprises a slab top steel bar (310), a slab bottom steel bar (320), and reserved holes (330); The connecting steel bars (200) are bundled and overlapped with the slab top steel bars (310) by extending out of the shear wall (100), and the studs (500) are inserted into the reserved holes (330), so that the composite floor slab (300) is stably connected to the shear wall (100) through the studs (500) and / or the connecting steel bars (200).
2. The connection node according to claim 1, characterized in that: The shear wall (100) comprises a wall body, transverse ribs (110), and longitudinal ribs (120); The transverse ribs (110) are laid on the wall along the length direction; The longitudinal ribs (120) are laid on the wall along the height direction; Connecting steel bars (200) are pre-embedded on the transverse ribs (110) and the longitudinal ribs (120).
3. The connection node according to claim 1, characterized in that: The connecting steel bars (200) include a plurality of fixing steel bars (210) and a plurality of stirrups (220), wherein the fixing steel bars (210) are laid on the transverse ribs (110) along the length direction, and the stirrups (220) are arranged outside the fixing steel bars (210) to bind them.
4. The connection node according to claim 3, characterized in that: It also includes additional steel bars (230), the additional steel bars (230) being laid on the upper side of the fixed steel bars (210), the stirrups (220) being wrapped around the fixed steel bars (210), being bent upward and binding the additional steel bars (230), and the ends of the stirrups (220) on the additional steel bars (230) extending outward from the transverse ribs (110) to overlap and be bound on the slab top steel bars (310).
5. The connection node according to claim 1, characterized in that: It also includes a cast-in-place superimposed layer (700), wherein the cast-in-place superimposed layer (700) is cast on the superimposed floor slab (300), and the superimposed floor slab (300) and the shear wall (100) form a whole.
6. The connection node according to claim 1, characterized in that: It also includes a reserved space (600), wherein the reserved space (600) is arranged above the transverse rib (110), and the end of the composite floor (300) extends into the reserved space (600); The connecting steel bars (200) in the transverse ribs (110) extend upwards and are bent to overlap the top steel bars (310) and the bottom steel bars (320) of the slab, and are then tied and fixed.
7. The connection node according to claim 5, characterized in that: The cast-in-place composite layer (700) is sequentially filled in the reserved space (600) and the composite floor slab (300).
8. The connection node according to claim 6, characterized in that: The slab top steel bars (310) located in the reserved space (600) are bent downward into a hook shape, and are anchored between the shear wall (100) and the composite floor slab (300) through the cast-in-place composite layer (700), thereby increasing the anchoring strength.
9. The connection node according to claim 1, characterized in that: It also includes a steel mesh (140) arranged on the shear wall (100), wherein the steel mesh (140) is arranged at one end of the shear wall (100) away from the composite floor slab (300) and is used to strengthen the structure of the shear wall (100).
10. The connection node according to claim 1, characterized in that: It comprises a lightweight filling body (130) arranged on a shear wall (100), wherein transverse ribs (110) and longitudinal ribs (120) on the shear wall (100) form a plurality of cavities, and the cavities are filled with the lightweight filling body (130).