CN115095054A - A positioning connector, a prefabricated anti-seismic composite wall and a construction method thereof - Google Patents

Abstract

The invention relates to the field of assembled buildings and discloses a positioning connecting piece, a prefabricated anti-seismic superposed wall and a construction method thereof, wherein the positioning connecting piece comprises an I-shaped base, an inverted cone-shaped sleeve, a base plate and a fastening bolt, the I-shaped base comprises an upper flange plate, a lower flange plate and a web member, the lower flange plate is parallel to the upper flange plate, and two ends of the web member are respectively and vertically connected with the upper flange plate and the lower flange plate; the upper flange plate and the web member are provided with threaded holes which are communicated and used for installing fastening bolts, and the axis of each threaded hole is parallel to the extending direction of the web member; the lower flange plate is pre-buried to be set up, and telescopic little terminal surface of back taper and upper flange plate butt, and fastening bolt passes the through-hole of backing plate, the telescopic through-hole of back taper and is connected with the I shape base in proper order to form the clamping area between backing plate and back taper sleeve, realized treating the accurate positioning connection of connecting elements.

Description

A positioning connector, a prefabricated anti-seismic composite wall and a construction method thereof

technical field

The invention relates to the technical field of prefabricated buildings, and more particularly, to a positioning connector. In addition, the present invention also relates to a prefabricated anti-seismic composite wall comprising the above-mentioned positioning connector and a construction method of the above-mentioned prefabricated anti-seismic composite wall.

Background technique

Prefabricated buildings are a new type of building production method that realizes energy conservation and environmental protection of building products and maximizes the full-cycle value of sustainable development. It greatly avoids the generation of construction waste, and can reduce carbon emissions by more than 40% in the full cycle. The advantages of energy saving and emission reduction are obvious.

Existing prefabricated buildings include prefabricated frame structures and prefabricated shear wall structures. Prefabricated shear wall structures mainly include double-sided superimposed shear wall structures and fully prefabricated grouting sleeve shear wall structures. The grouting sleeve shear wall structure is difficult to guarantee the compactness of the sleeve grouting, and its application in some areas is limited, and the entire prefabrication of the wall leads to a significant increase in transportation and hoisting costs. The double-sided superimposed shear wall structure has developed the most rapidly in recent years, but the current double-sided superimposed shear wall structure still has the following problems:

First, the double-sided superimposed shear wall is composed of a first skin wall and a second skin wall. During factory prefabrication, the first skin wall needs to be cured and demolded, and then the first skin wall and the second skin wall are superimposed to make The process is complex and the production period is long. In the process of lamination, it is necessary to ensure that the positions of the two skin walls correspond to each other, and the total thickness of the laminated walls must be precisely controlled, resulting in not only expensive production equipment, but also possible deviations in the relative positions of the two skin walls. This leads to a decrease in component accuracy and an increase in manufacturing costs.

Second, the thickness d of the single-sided skin wall of the double-sided superimposed shear wall is greater than or equal to 50mm, which makes the double-sided superimposed shear wall have a larger self-weight, higher power requirements for transportation and hoisting equipment, and high transportation and hoisting costs.

To sum up, how to provide a connector and its prefabricated laminated wall that can be accurately positioned, simple in production process, reliable in performance and convenient for connecting components is an urgent problem to be solved by those skilled in the art.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a positioning connector, one end is pre-embedded and connected to the component to be connected, and the other end is bolted to the component to be connected, so as to achieve accurate positioning and connection of the component to be connected, and The structure is simple, the manufacture is convenient, and the connection is convenient and reliable.

In addition, the present invention also provides a prefabricated anti-seismic composite wall comprising the above-mentioned positioning connector and a construction method for the above-mentioned prefabricated anti-seismic composite wall.

In order to achieve the above object, the present invention provides the following technical solutions:

A positioning connector includes an I-shaped base, an inverted conical sleeve, a backing plate and a fastening bolt, the I-shaped base includes an upper flange plate, a lower flange plate and a web rod, the lower flange The plate is parallel to the upper flange plate, and the two ends of the web rod are respectively vertically connected to the upper flange plate and the lower flange plate;

The upper flange plate and the web rod are provided with communicating threaded holes for installing the fastening bolts, and the axis of the threaded holes is parallel to the extending direction of the web rod;

The lower flange plate is pre-embedded, the small end face of the inverted conical sleeve is in contact with the upper flange plate, and the fastening bolts pass through the through holes of the backing plate and the inverted cone in sequence. The through hole of the shaped sleeve is connected with the I-shaped base, so as to form a clamping area between the backing plate and the reverse tapered sleeve.

Preferably, at least one annular barb is provided in the through hole of the inverted conical sleeve.

A prefabricated anti-seismic composite wall, comprising an upper layer distribution steel bar, a lower layer distribution steel bar, a prefabricated concrete layer, a template and a plurality of positioning connectors described in any one of the above, wherein the upper layer distribution steel bar and the lower layer distribution steel bar are connected by tension The steel bars and/or truss steel bars are connected, and the lower distribution steel bars, the lower flange plates of the positioning connectors and the lower end hooks of the tie bars are all pre-buried in the precast concrete layer;

The web rod of the positioning connector passes through the lower distribution steel bars, the inverted conical sleeve of the positioning connector passes through the upper distribution steel bars, and the fastening bolts of the positioning connector pass through the template in turn The through hole of the inverted conical sleeve is connected with the I-shaped base of the positioning connector, so as to enclose the space between the formwork and the precast concrete layer, and is used for pouring concrete after pouring on site. 's cavity.

Preferably, the truss reinforcement is arranged between the upper distribution reinforcement and the lower distribution reinforcement, and the truss reinforcement is used to partially or completely replace the tie reinforcement;

The truss steel bar includes at least one upper-layer steel bar and at least two lower-layer steel bars, and the upper-layer steel bar and the lower-layer steel bar are successively welded and formed by steel wires, steel bars or steel strands, so as to form an N-shaped structure or an M-shaped structure. ;

The upper-layer steel bars are bound or welded to the upper-layer distribution steel bars, the lower-layer steel bars are bound or welded to the lower-layer distribution steel bars, and the lower-layer steel bars are pre-buried in the precast concrete layer.

Preferably, the clear distance between the outer edge of the upper distribution steel bar and the precast concrete layer is greater than or equal to 100 mm.

Preferably, it also includes an insulation layer disposed between the formwork and the upper distribution steel bars, the insulation layer is not in contact with the inner surface of the formwork and the outer surface of the upper distribution reinforcement bars, so as to reserve all the The pouring space for post-cast concrete is described.

A construction method for the prefabricated anti-seismic composite wall described in any one of the above, comprising:

Use tie bars and/or truss bars to connect upper distribution bars and lower distribution bars to form reinforcement cages;

A number of positioning connectors are pierced on the reinforcement cage, the lower flange plate of the positioning connector protrudes from the outer edge of the lower distribution steel bars, and the large end face of the inverted conical sleeve of the positioning connector protrudes The outer edge of the upper distribution steel bars;

pouring a prefabricated concrete layer, and pre-embedding the lower end hooks of the tie bars, the lower distribution steel bars and the lower flange plate in the prefabricated concrete layer;

The formwork is fixed between the head of the fastening bolt and the large end face of the inverted conical sleeve by using fastening bolts to complete the assembly of the prefabricated wall;

Transporting and hoisting the prefabricated wall to the construction position, connecting the prefabricated wall and the edge member, and pouring concrete after pouring;

After the post-cast concrete reaches a predetermined strength, the fastening bolts, the formwork and the inverted conical sleeve are disassembled, and filling is performed.

Preferably, when the edge member is an in-line edge member, and the longitudinal bars of the edge member are connected by binding, the reinforcement cage of the edge member and the prefabricated wall are integrally prefabricated.

Preferably, when the edge member is not a one-line edge member or the longitudinal ribs of the edge member are non-binding connection, the connecting the prefabricated wall and the edge member includes:

prefabricated or fabricated on-site reinforcement cages for said edge members;

Transfer the reinforcement cage of the edge member to the design position, and there is a gap between the reinforcement cage of the edge member and the prefabricated wall;

Horizontal connecting steel bars are evenly placed in the gap between the reinforcing bar cage of the edge member and the prefabricated wall.

When the positioning connector provided by the present invention is used, the lower flange plate of the I-shaped base is pre-buried in the component to be connected, so that the web rod is perpendicular to the surface of the component; , Another component to be connected and the backing plate, the fastening bolts are sequentially connected with the I-shaped base through the through hole of the backing plate, the through hole of the other component to be connected and the through hole of the inverted conical sleeve. , thus connecting the two components.

Taking the prefabricated anti-seismic composite wall as an example, the lower flange plate of the I-shaped base is pre-buried in the prefabricated concrete layer, and the upper flange plate is exposed; The through hole of the barrel is aligned with the threaded hole of the I-shaped base; the template is placed on the large end face of the inverted conical sleeve, the through hole of the template is aligned with the through hole of the inverted conical The formwork and the inverted conical sleeve are connected to the precast concrete layer; after the precast connection is completed, the precast structure is transported and hoisted to the design position, and the concrete is poured after pouring; after the concrete reaches a certain strength, remove the fastening bolts, backing plates, formwork and Inverted tapered sleeve for reuse.

Therefore, the positioning connector provided by the present invention integrates positioning and connection, has a simple structure, is easy to manufacture and disassemble, effectively ensures that the relative positions of the components to be connected are accurate, and the fastening bolts, the backing plate and the inverted conical sleeve are The cartridge can be reused, with low cost and high profit.

At the same time, a cavity may be provided between the two components connected by the positioning connector, which is beneficial to reduce the overall quality of the prefabricated building, thereby reducing the cost and difficulty of transportation and hoisting.

In addition, the present invention also provides a prefabricated anti-seismic composite wall comprising the above-mentioned positioning connector and a construction method for the above-mentioned prefabricated anti-seismic composite wall.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

1 is a schematic structural diagram of a specific embodiment of a positioning connector provided by the present invention;

Fig. 2 is the structural representation of the inverted conical sleeve in Fig. 1;

3 is a schematic top view of a specific embodiment 1 of the prefabricated anti-seismic composite wall provided by the present invention;

FIG. 4 is a schematic top view of the second specific embodiment of the prefabricated anti-seismic composite wall provided by the present invention;

5 is a schematic top view of a specific embodiment 3 of the prefabricated anti-seismic composite wall provided by the present invention;

FIG. 6 is a schematic top view of a fourth specific embodiment of the prefabricated anti-seismic composite wall provided by the present invention;

7 is a schematic top view of a specific embodiment 5 of the prefabricated anti-seismic composite wall provided by the present invention;

8 is a schematic top view of a sixth embodiment of the prefabricated anti-seismic composite wall provided by the present invention;

FIG. 9 is a schematic diagram of the distribution of the tie bars and positioning connectors in the prefabricated anti-seismic composite wall provided by the present invention;

Fig. 10 is the assembly schematic diagram of the prefabricated wall body and the L-shaped edge member of the prefabricated anti-seismic composite wall provided by the present invention;

11 is a schematic diagram of the overall prefabrication of the prefabricated wall body and the in-line edge member of the prefabricated seismic composite wall provided by the present invention;

FIG. 12 is a schematic structural diagram of the reinforcement cage of the edge member.

In Figure 1-Figure 12:

11 is the I-shaped base, 12 is the inverted conical sleeve, 121 is the annular barb, 13 is the fastening bolt, 14 is the backing plate, 2 is the upper distribution steel bar, 3 is the lower distribution steel bar, 4 is the tie bar , 5 is truss reinforcement, 6 is precast concrete layer, 7 is cavity, 8 is insulation layer, 9 is template, 10 is edge member, 101 is longitudinal reinforcement, 102 is stirrup, and 103 is horizontal connection reinforcement.

Detailed ways

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

The core of the invention is to provide a positioning connector, one end is pre-embedded and connected to the component to be connected, and the other end is bolted to the component to be connected, so as to realize the accurate positioning and connection of the component to be connected, and the structure is simple and convenient. It is convenient and reliable to manufacture and connect.

In addition, the present invention also provides a prefabricated anti-seismic composite wall comprising the above-mentioned positioning connector and a construction method for the above-mentioned prefabricated anti-seismic composite wall.

Please refer to Figure 1-Figure 12.

The positioning connector provided by the present invention includes an I-shaped base 11, an inverted conical sleeve 12, a backing plate 14 and a fastening bolt 13. The I-shaped base 11 includes an upper flange plate, a lower flange plate and a web rod, The lower flange plate is parallel to the upper flange plate, and the two ends of the web rod are respectively connected vertically with the upper flange plate and the lower flange plate;

The upper flange plate and the web rod are provided with connected threaded holes for installing the fastening bolts 13, and the axis of the threaded holes is parallel to the extending direction of the web rod;

The lower flange plate is pre-embedded, the small end face of the inverted conical sleeve 12 is in contact with the upper flange plate, and the tightening bolts 13 pass through the through holes of the backing plate 14, the through holes of the inverted conical sleeve 12 and the workpiece in sequence. The font base 11 is connected so as to form a clamping area between the backing plate 14 and the reverse tapered sleeve 12 .

Please refer to FIG. 1, the lower flange plate of the I-shaped base 11 is pre-buried in the components to be connected (including the precast concrete layer 6, the formwork 9, etc.), the web of the I-shaped base 11 and the upper flange plate two It can be pre-embedded in the component, or it can protrude from the surface of the component, as long as it is ensured that the large end face of the inverted conical sleeve 12 is located outside the component.

The upper and lower flange plates of the I-shaped base 11 can be welded and connected to both ends of the web rod, or can be threadedly connected to the web rod, or the three can be set as an integral structure, which is integrally formed by casting and turning by means of turning and other methods. Machine threaded holes.

The shapes of the upper and lower flange plates and web bars of the I-shaped base 11 are not limited. The upper and lower flange plates can be set to be circular, rectangular and triangular, and the web bars can be set to cylinders, truncated cones and prisms, etc. shape. Preferably, the axis of the upper flange plate, the axis of the web rod and the axis of the lower flange plate can be set to be collinear.

The upper flange plate and the web rod of the I-shaped base 11 are provided with threaded holes for installing the fastening bolts 13. Preferably, the axis of the threaded hole can be set to be collinear with the axis of the web rod, that is, the threaded hole is arranged on the web rod. In order to reduce the size of the web rod on the premise of ensuring the structural strength of the web rod.

The inverted conical sleeve 12 is placed on the upper end face of the upper flange plate of the I-shaped base 11. The inverted conical sleeve 12 is provided with a through hole for installing the fastening bolt 13. In the case of force, the through hole of the reverse tapered sleeve 12 is usually arranged in the center of the reverse tapered sleeve 12 .

In order to facilitate the disassembly of the inverted conical sleeve 12 after the two components are connected by the post-cast concrete, the shape of the inverted-conical sleeve 12 is inverted to facilitate the demoulding of the inverted conical sleeve 12 in the post-cast concrete. . The taper of the outer peripheral surface of the inverted conical sleeve 12 is determined with reference to the prior art according to factors such as the type and size of the post-cast concrete in the actual construction, and will not be repeated here.

Preferably, at least one annular barb 121 may be provided in the through hole of the inverted conical sleeve 12, so that the inverted conical sleeve 12 can be taken out when the inverted conical sleeve 12 is wrapped with post-cast concrete or the like. The specific shape, size and setting position of the annular barb 121 are determined according to actual construction needs, and will not be repeated here.

In order to facilitate the repeated use of the inverted conical sleeve 12, preferably, the inverted conical sleeve 12 can be set as a plastic sleeve, which is light in weight, can be mass-produced by injection molding, has low manufacturing cost, is easy to demold, and is easy to reuse. .

The length L of the inverted conical sleeve 12, the height h of the I-shaped base 11, the embedded depth d of the I-shaped base 11 and the distance D of the two components to be connected satisfy the following relationship: D=L+h-d, where , the pre-embedded depth d of the I-shaped base 11 is the distance from the surface of the component close to the inverted conical sleeve 12 to the lower end face of the lower flange plate.

Considering that the embedded depth d of the I-shaped base 11 will affect the connection strength of the I-shaped base 11 and the component, resulting in a smaller adjustable range of the embedded depth d of the I-shaped base 11, usually by adjusting the inverted tapered sleeve The length L of the barrel 12 and the height h of the I-shaped base 11 meet the design distance requirements of the two components to be connected.

The tightening bolt 13 is connected to the I-shaped base 11 through the through hole of the backing plate 14 and the through hole of the inverted conical sleeve 12. The tightening force of the tightening bolt 13 is partly used to offset the post-casting between the two connected components. The side pressure of the concrete on the two sides of the members; the other part is transmitted to the inverted conical sleeve 12 through the components, so that the two ends of the inverted conical sleeve 12 are closely attached to the surface of the component and the upper end surface of the upper flange plate. It is beneficial to ensure the relative positional relationship between the two components to be connected.

The fastening bolts 13 are mostly hexagonal head bolts. The specific types, materials and sizes of the I-shaped base 11, the inverted conical sleeve 12 and the fastening bolts 13 are checked and calculated according to the design connection strength requirements in the actual construction.

For example, the strength and rigidity of the web rod of the I-shaped base 11 should be greater than or equal to the strength and rigidity of the stressed steel bars in the component; the compressive strength of the inverted conical sleeve 12 and the tensile strength of the fastening bolts 13 should be greater than or equal to The maximum lateral pressure of the post-cast concrete on the member.

The backing plate 14 is arranged between the bolt head of the fastening bolt 13 and the component to be connected, and the size of the backing plate 14 is larger than the size of the through hole of the component to be connected, so as to prevent the concrete from overflowing when pouring concrete after pouring; When the size of the bolt head of the bolt 13 is larger than the size of the through hole of the component to be connected, the structure of the backing plate 14 can also be eliminated.

The backing plate 14 is provided with a through hole for the fastening bolt 13 to pass through, and the diameter of the through hole is slightly larger than the outer diameter of the fastening bolt 13; It is made of any material with certain bending strength such as steel, plastic, alloy, etc.

When in use, the lower flange plate of the I-shaped base 11 is pre-buried in the component to be connected, so that the web bar is perpendicular to the surface of the component; The component and the backing plate 14, the fastening bolts 13 pass through the through hole of the backing plate 14, the through hole of another component to be connected, and the through hole of the reverse tapered sleeve 12 in turn, and then screwed with the I-shaped base 11. , thus connecting the two components.

Taking the prefabricated seismic composite wall as an example, please refer to Fig. 3-Fig. 8, pre-embed the lower flange plate of the I-shaped base 11 in the prefabricated concrete layer 6, and expose the upper flange plate; Conical sleeve 12, align the through hole of the inverted conical sleeve 12 with the threaded hole of the I-shaped base 11; place the template 9 on the large end face of the inverted conical sleeve 12, and align the through hole of the template 9 with the inverted The through hole of the conical sleeve 12 is used to connect the formwork 9 and the inverted conical sleeve 12 to the precast concrete layer 6 by using the fastening bolts 13 and the backing plate 14; After pouring, pour concrete; after the concrete reaches a certain strength, remove the fastening bolts 13, the backing plate 14, the template 9 and the inverted conical sleeve 12 for repeated use.

In this embodiment, the positioning connector integrates positioning and connection, and has a simple structure, which is easy to manufacture and disassemble, effectively ensuring the relative position of the components to be connected is accurate, and the fastening bolt 13, the backing plate 14 and the inverted cone are effectively guaranteed. The shaped sleeve 12 can be reused with low cost and high profit.

At the same time, a cavity 7 may be provided between the two components connected by the positioning connector, which is beneficial to reduce the overall quality of the prefabricated building, thereby reducing the cost and difficulty of transportation and hoisting.

Preferably, considering that the lower flange plate of the I-shaped base 11 is pre-embedded, in order to prevent the I-shaped base 11 from rusting, the I-shaped base 11 can be made of corrosion-resistant materials such as stainless steel, titanium alloy and high-strength plastic.

Of course, ordinary steel can also be used to make the I-shaped base 11. In order to prevent it from rusting when exposed to the air for a long time, it is necessary to provide a rust-proof gasket made of corrosion-resistant material on the lower end face of the lower flange plate; the rust-proof gasket The thickness is mostly set to 5-40mm, and it is mostly made of inorganic non-metallic materials such as cement mortar and fiber composite materials.

In addition to the above-mentioned positioning connector, the present invention also provides a prefabricated seismic composite wall including the above-mentioned positioning connector, the prefabricated seismic composite wall includes upper distribution steel bars 2, lower distribution steel bars 3, prefabricated concrete layer 6, formwork 9 and Several of the positioning connectors disclosed in the above embodiments, the upper distribution steel bar 2 and the lower layer distribution steel bar 3 are connected by the tie bars 4 and/or the truss steel bars 5, the lower layer distribution steel bars 3, the lower flange plate and the tie bars of the positioning connector The lower hooks of 4 are embedded in the precast concrete layer 6;

The web rod of the positioning connector passes through the lower distribution steel bar 3, the inverted conical sleeve 12 of the positioning connector passes through the upper distribution bar 2, and the fastening bolts 13 of the positioning connector pass through the through holes of the template 9 and the inverted cone in turn. The through hole of the sleeve 12 is then connected to the I-shaped base 11 of the positioning connector, so as to enclose a cavity 7 between the formwork 9 and the precast concrete layer 6 for pouring concrete on site.

Please refer to Fig. 9, the upper distribution steel bar 2 and the lower distribution steel bar 3 can be set as steel mesh sheets, or can be set as a steel mesh formed by binding or welding several horizontal steel bars and several vertical steel bars, and the upper distribution steel bar 2 The specific material and size of the distribution steel bar 3 and the lower layer are determined according to the design strength requirements of the actual construction, and will not be repeated here.

The upper distribution steel bar 2 and the lower distribution steel bar 3 are connected by the tie bar 4 and/or the truss steel bar 5 to form the steel skeleton of the prefabricated anti-seismic composite wall; in order to ensure that the steel cage can be completely wrapped by the post-cast concrete, preferably, the upper distribution The clear distance between the outer edge of the steel bar 2 and the precast concrete layer 6 should be greater than or equal to 100mm.

Taking the tie bar 4 as an example, the upper hook of the tie bar 4 is bound or welded to the upper distribution steel bar 2, and the lower end hook of the tie bar 4 is bound or welded to the lower distribution steel bar 3; The distribution steel bars 2 and the lower distribution steel bars 3 are distributed in a plum blossom shape, as shown in Figure 9.

Of course, the truss steel bar 5 can also be used to replace the tie bar 4. The truss steel bar 5 is arranged between the upper distribution steel bar 2 and the lower layer distribution steel bar 3, and the truss steel bar 5 is used to partially or completely replace the tie bar 4, as shown in Fig. 4 and Fig. 6 and Figure 8;

The truss steel bar 5 includes at least one upper-layer steel bar and at least two lower-layer steel bars, and the upper-layer steel bar and the lower-layer steel bar are successively welded and formed by steel wire, steel bar or steel strand to form an N-shaped structure or an M-shaped structure;

The upper-layer steel bars are bound or welded to the upper-layer distribution steel bars 2 , the lower-layer steel bars are bound or welded to the lower-layer distribution steel bars 3 , and the lower-layer steel bars are embedded in the precast concrete layer 6 .

In order to make the tension force of the upper and lower distributed steel bars relatively uniform, the tie bars 4 and/or the truss bars 5 can be arranged evenly along the length of the steel cage, and the spacing between two adjacent truss bars 5 can be set to 200- 800mm.

In order to prevent the steel cage from moving relative to the positioning connector during transportation, the web rod of the I-shaped base 11 can be bound and connected to the steel cage through steel wire, steel bar or steel strand, or directly welded to the steel cage.

Preferably, the web bar of the I-shaped base 11 can be set at the intersection of the reinforcing bars of the reinforcing bar cage. The rebar intersection point of the rebar cage is the connection point of the horizontal rebar and the vertical rebar of the upper and lower distributed rebars. The web bar of the I-shaped base 11 is connected here, which can effectively connect the fixed rebar cage and the positioning connector.

The precast concrete layer 6 is prefabricated in the factory, and the lower distribution steel bars 3, the lower flange plates of the I-shaped base 11, the lower hooks of the tie bars 4 and/or the lower steel bars of the truss steel bars are all pre-buried in the precast concrete layer. 6, the thickness of the precast concrete layer 6 and the embedded depth of each component are determined according to the design requirements of the actual construction, and the thickness of the precast concrete layer 6 is usually set to 20-80mm.

In order to strengthen the bond between the precast concrete layer 6 and the post-cast concrete, a roughening or concave-convex groove is usually provided on the inner surface of the precast concrete layer 6, and the concave-convex depth is greater than or equal to 3 mm.

In addition, when laying pipelines or opening doors and windows in the prefabricated anti-seismic composite wall, the corresponding pipeline openings or door and window openings should be reserved on the prefabricated concrete layer 6 and the formwork 9 to place the corresponding molds.

The formwork 9 is arranged between the backing plate 14 and the small end face of the inverted conical sleeve 12 , and the formwork 9 is arranged parallel to the inner surface of the precast concrete layer 6 to enclose a cavity 7 for pouring concrete on site.

Preferably, the formwork 9 includes wooden formwork, stainless steel formwork, plastic formwork, aluminum alloy formwork, PVC skinned foam board and fiber reinforced composite board. The specific type of the template 9 is determined according to the actual construction needs with reference to the prior art; the thickness of the template 9 is determined according to the material of the template 9, the higher the structural strength of the template 9, the smaller the minimum thickness of the template 9.

During production, firstly, the tie bars 4 and/or the truss bars 5 are used to connect the upper distribution bars 2 and the lower distribution bars 3 to form a reinforcement cage; The flange plate protrudes from the outer edge of the lower distribution steel bar 3, and the large end face of the inverted conical sleeve 12 of the positioning connector protrudes from the outer edge of the upper distribution steel bar 2; The lower flange plate, the lower hook of the tie bar 4 and/or the lower reinforcement of the truss reinforcement 5 are pre-buried in the precast concrete layer 6, and the formwork 9 is pressed and connected to the I-shaped base 11 by means of the fastening bolts 13. On the upper flange plate, the factory prefabrication of the prefabricated wall is completed.

After the prefabrication is completed, transport and hoist the prefabricated wall to the design position, and connect the prefabricated walls of each layer according to the design requirements, or connect the prefabricated wall and the edge member 10; After reaching the preset strength, remove the fastening bolts 13, the template 9 and the inverted conical sleeve 12, and fill and replenish the slurry.

In this embodiment, the reinforcing cage, the prefabricated concrete layer 6 and the formwork 9 are precisely positioned and connected by using positioning connectors to complete the construction of the prefabricated wall. Compared with the existing double-sided laminated shear wall, only prefabricated For one side wall, not only the production process is simple and convenient, the production process is obviously shortened, but also the problem of assembly accuracy of the two sides of the wall is avoided, and the waste of resources is reduced.

At the same time, the prefabricated wall is only half the mass of the double-sided superimposed shear wall, which effectively reduces the transportation load and greatly facilitates the transportation and hoisting of the prefabricated seismic composite wall.

In addition, compared with the double-sided superimposed shear wall of the same thickness, the prefabricated seismic composite wall has a larger operating space during on-site construction, which is conducive to the pouring, vibration and quality inspection of the post-cast concrete, and the construction is convenient and beneficial. Improve construction quality.

On the basis of the above-mentioned embodiment, please refer to FIG. 7 and FIG. 8 , the prefabricated anti-seismic composite wall also includes a thermal insulation layer 8 arranged between the formwork 9 and the upper distribution steel bars 2 . The surface of the thermal insulation layer 8 is connected to the inner surface of the formwork 9 . The outer surfaces of the upper distribution steel bars 2 are not in contact, so as to reserve the pouring space for the post-cast concrete.

The type and thickness of the thermal insulation layer 8 are determined according to the building thermal insulation regulations in various regions with reference to the prior art. It needs to be determined and will not be repeated here.

In the present embodiment, a certain distance is reserved between the insulating layer 8 and the template 9 and the upper distribution steel bars 2, which is beneficial to wrap the upper distribution steel bars 2 in the post-cast concrete, so that the upper-layer distribution steel bars 2 and the post-cast concrete can be It also makes the thermal insulation layer 8 have a certain thickness of post-cast concrete protection, which can play the function of anti-corrosion and fire prevention.

In addition, the present invention also provides a construction method for the prefabricated anti-seismic composite wall disclosed in the above embodiments, including:

Step S1, using the tie bar 4 and/or the truss bar 5 to connect the upper distribution bar 2 and the lower layer distribution bar 3 to form a reinforcement cage;

In step S2, a number of positioning connectors are drilled on the reinforcement cage, the lower flange plate of the positioning connector protrudes from the outer edge of the lower distribution steel bars 3, and the large end face of the inverted conical sleeve 12 of the positioning connector protrudes from the upper distribution. Outer edge of rebar 2;

Step S3, pouring the precast concrete layer 6, pre-embedding the lower end hooks of the tie bars 4, the lower distribution steel bars 3 and the lower flange plate in the precast concrete layer 6;

Step S4, using the fastening bolts 13 to fix the template 9 between the head of the fastening bolts 13 and the large end face of the inverted conical sleeve 12 to complete the assembly of the prefabricated wall;

Step S5, transport and hoist the prefabricated wall to the construction position, connect the prefabricated wall and the edge member 10, and pour concrete after pouring;

In step S6, after the post-cast concrete reaches the predetermined strength, the fastening bolts 13, the formwork 9 and the inverted conical sleeve 12 are removed, and the filling is carried out.

It should be noted that in step S5, as shown in FIG. 10 and FIG. 11 , the edge member 10 includes various types such as a straight edge member, an L-shaped edge member, and a T-shaped edge member, and the type of the edge member 10 and The type of the reinforcement cage of the edge member 10 will affect the connection mode of the edge member 10 and the prefabricated wall.

Preferably, when the edge member 10 is a straight-line edge member and the longitudinal bars 101 of the edge member 10 are connected by binding, the reinforcement cage of the edge member 10 can be prefabricated integrally with the prefabricated wall.

Please refer to FIG. 11, the longitudinal reinforcement 101 of the in-line edge member is bound or welded with the distribution reinforcement bars on the upper and lower layers of the prefabricated wall. The longitudinal reinforcement 101 is covered with stirrups 102, and between the upper and lower longitudinal reinforcement The tie bars 4; the precast concrete layer 6 of the in-line edge member is connected with the prefabricated concrete layer 6 of the prefabricated wall; the formwork 9 of the in-line edge member and the formwork 9 of the prefabricated wall are assembled and connected, or the two share the same formwork 9.

Preferably, please refer to FIG. 10 , when the edge member 10 is a non-inline edge member or the longitudinal rib 101 of the edge member 10 is a non-binding connection, connecting the prefabricated wall body and the edge member 10 includes:

Step S51, the reinforcement cage of the edge member 10 is prefabricated or fabricated on site, and there is a gap between the reinforcement cage of the edge member 10 and the prefabricated wall;

In step S52, the horizontal connecting reinforcement bars 103 are evenly placed in the gap between the reinforcement cage of the edge member 10 and the prefabricated wall.

It should be noted that in step S51, the order of making the reinforcement cage of the edge member 10 and hoisting the prefabricated wall on site is not limited. After the production of the steel cage, the prefabricated wall is hoisted.

When the longitudinal ribs 101 of the edge member 10 are not suitable to be connected by binding, the longitudinal ribs 101 of the edge member 10 can be connected by mechanical connection, grouting sleeve and welding.

It should be noted that in step S52, the horizontal connecting reinforcing bars 103 are generally arranged in the center of the connecting surface of the edge member 10, and the horizontal connecting reinforcing bars 103 are evenly arranged along the height direction of the prefabricated seismic composite wall.

The shape of the horizontal connecting steel bar 103 is not limited, and can be bent into a rectangle as shown in FIG. 10 , or into a circle or other geometric shapes.

What needs to be explained in step S6 is that when the distance from the template 9 to the precast concrete layer 6 is greater than or equal to 200mm, that is, when the width of the cavity 7 is greater than or equal to 200mm, ordinary concrete is poured; otherwise, self-compacting concrete or Fine stone concrete.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other.

The positioning connector, the prefabricated anti-seismic composite wall and the construction method thereof provided by the present invention are described in detail above. The principles and implementations of the present invention are described herein by using specific examples, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (9)

1. A positioning connecting piece is characterized by comprising an I-shaped base, an inverted cone-shaped sleeve, a base plate and a fastening bolt, wherein the I-shaped base comprises an upper flange plate, a lower flange plate and a web member, the lower flange plate is parallel to the upper flange plate, and two ends of the web member are respectively and vertically connected with the upper flange plate and the lower flange plate;

the upper flange plate and the web member are provided with threaded holes which are communicated with each other and used for mounting the fastening bolts, and the axis of each threaded hole is parallel to the extending direction of the web member;

the pre-buried setting of bottom flange board, the telescopic little terminal surface of back taper with upper limb flange board butt, fastening bolt passes in proper order the through-hole of backing plate the telescopic through-hole of back taper with the I shape base is connected, so that the backing plate with form the centre gripping district between the back taper sleeve.

2. The locating connection of claim 1, wherein the through bore of the inverted cone sleeve has at least one annular barb disposed therein.

3. A prefabricated earthquake-resistant superposed wall is characterized by comprising upper-layer distributed steel bars, lower-layer distributed steel bars, a prefabricated concrete layer, a template and a plurality of positioning connecting pieces according to claim 1 or 2, wherein the upper-layer distributed steel bars and the lower-layer distributed steel bars are connected through tie bars and/or truss steel bars, and the lower-layer distributed steel bars, lower flange plates of the positioning connecting pieces and lower end hooks of the tie bars are all pre-embedded in the prefabricated concrete layer;

the web member of positioning connection spare passes lower floor's distributed reinforcement, positioning connection spare's back taper sleeve passes upper strata distributed reinforcement, positioning connection spare's fastening bolt passes in proper order the through-hole of template behind the telescopic through-hole of back taper with positioning connection spare's I shape base is connected, so that enclose the template with between the precast concrete layer, be used for pouring the cavity of concrete after the site pouring.

4. A prefabricated earthquake-resistant superimposed wall according to claim 3, wherein the truss reinforcing steel bars are arranged between the upper layer of distributed reinforcing steel bars and the lower layer of distributed reinforcing steel bars, and the truss reinforcing steel bars are used for partially or completely replacing the tie bars;

the truss steel bars comprise at least one upper layer steel bar and at least two lower layer steel bars, and the upper layer steel bar and the lower layer steel bar are welded and connected one by one through steel wires, steel bars or steel strands to form an N-shaped structure or an M-shaped structure;

the upper reinforcing steel bar with upper distribution reinforcement ligature or welded connection, lower floor's reinforcing steel bar with lower floor's distribution reinforcement ligature or welded connection, just lower floor's reinforcing steel bar bury in advance in the precast concrete layer.

5. The prefabricated earthquake-resistant superimposed wall as claimed in claim 4, wherein the clear distance between the outer edge of the upper distributed steel bars and the prefabricated concrete layer is greater than or equal to 100 mm.

6. A prefabricated anti-seismic superimposed wall according to any one of claims 3-5, further comprising a heat-insulating layer arranged between the formwork and the upper-layer distributed steel bars, wherein the heat-insulating layer is not in contact with the inner surface of the formwork and the outer surface of the upper-layer distributed steel bars, so that a pouring space for the post-cast concrete is reserved.

7. A construction method for the prefabricated earthquake-resistant laminated wall as defined in any one of claims 3 to 6, comprising:

connecting upper-layer distributed steel bars and lower-layer distributed steel bars by using tie bars and/or truss steel bars to form a steel bar cage;

a plurality of positioning connecting pieces are arranged on the reinforcement cage in a penetrating manner, the lower flange plate of each positioning connecting piece protrudes out of the outer edge of the lower-layer distributed reinforcement, and the large end surface of the inverted cone-shaped sleeve of each positioning connecting piece protrudes out of the outer edge of the upper-layer distributed reinforcement;

pouring a precast concrete layer, and embedding the lower end hook of the tie bar, the lower-layer distributed steel bar and the lower flange plate in the precast concrete layer in advance;

fixing a template between the head of the fastening bolt and the large end face of the inverted cone-shaped sleeve by using the fastening bolt to finish the assembly of the prefabricated wall;

transporting and hoisting the prefabricated wall body to a construction position, connecting the prefabricated wall body with the edge member, and pouring post-cast concrete;

and after the post-cast concrete reaches the preset strength, disassembling the fastening bolt, the template and the inverted cone-shaped sleeve, and filling and replenishing the slurry.

8. The construction method according to claim 7, wherein when the edge member is a straight edge member and the longitudinal bars of the edge member are connected by binding, the reinforcement cage of the edge member is prefabricated and formed integrally with the prefabricated wall.

9. The construction method according to claim 7, wherein when the edge member is not a straight edge member or the longitudinal rib of the edge member is in non-binding connection, the connecting the prefabricated wall body and the edge member comprises:

prefabricating or manufacturing a reinforcement cage of the edge member on site;

transferring the reinforcement cage of the edge member to a design position, wherein a gap exists between the reinforcement cage of the edge member and the prefabricated wall body;

and uniformly placing horizontal connecting steel bars in the gap between the steel bar cage of the edge member and the prefabricated wall body.

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