CN115075436A - A kind of prefabricated combined shear wall and construction method thereof - Google Patents

Abstract

The invention relates to the field of prefabricated buildings, and discloses a prefabricated combined shear wall and a construction method thereof. The prefabricated combined shear wall comprises upper distribution steel bars, lower distribution steel bars, two mutually parallel load-bearing wall panels and several Positioning connector, the positioning connector includes T-shaped connector, hat-shaped connector and fastening bolts, and the wing plate and hat-shaped connector of the T-shaped connector are embedded in the two bearing wall panels respectively; the upper layer distributes steel bars and The lower distributed steel bars are connected to form a steel cage, and the steel cage is set between two bearing wall panels; the web rod of the T-shaped connector runs through the thickness direction of the steel cage, and the fastening bolts pass through the through hole of the hat-shaped connector and the web rod Threaded connection, so as to enclose the cavity for pouring concrete after pouring; the shear bearing capacity of the bearing wall panel is greater than or equal to the shear bearing capacity of the post-cast concrete of equal thickness, and the inner surface of the bearing wall panel is provided with several tools. The font anchors reduce the mass of the wall and facilitate the transportation and hoisting of the wall.

Description

A kind of prefabricated combined shear wall and its construction method

technical field

The invention relates to the technical field of prefabricated buildings, in particular to a prefabricated combined shear wall. In addition, the present invention also relates to a construction method for the above-mentioned prefabricated combined shear wall.

Background technique

Prefabricated concrete buildings refer to concrete structures designed and constructed by on-site assembly based on factory-produced reinforced concrete prefabricated components.

At present, the common prefabricated concrete shear wall structures, such as all prefabricated shear wall structures and prefabricated integral double-sided superimposed concrete shear wall structures, have a large proportion of prefabricated parts, and the shear walls are of high quality, requiring the use of large-scale transportation equipment. The transportation and hoisting of components are carried out with large hoisting equipment, and the transportation and hoisting costs of prefabricated components are relatively high.

To sum up, how to reduce the quality of the prefabricated wall of the prefabricated concrete shear wall and enhance its overall connection reliability and construction convenience 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 prefabricated combined shear wall, which utilizes positioning connectors to tie the steel cage and the load-bearing wall panels on both sides, and there is a cavity between the two load-bearing wall panels, which greatly reduces the need for It improves the quality of the prefabricated wall and facilitates the transportation and hoisting of the prefabricated wall.

In addition, the present invention also provides a construction method for the above-mentioned prefabricated combined shear wall.

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

A prefabricated combined shear wall includes distribution steel bars on the upper layer, distribution steel bars on the lower layer, two mutually parallel load-bearing wall panels and several positioning connectors, the positioning connectors include T-shaped connectors, hat-shaped connectors and Fastening bolts, the wings of the T-shaped connector are pre-buried in the load-bearing wall panel on one side, and the hat-shaped connector is pre-embedded in the load-bearing wall panel on the other side;

The upper distribution reinforcement and the lower distribution reinforcement are connected by tie bars to form a reinforcement cage, the reinforcement cage is arranged between the two load-bearing wall panels, and the web rod of the T-shaped connector penetrates through the thickness direction of the reinforcement cage;

The fastening bolts pass through the through holes of the hat-shaped connector and are threadedly connected to the web rods, so as to enclose a cavity for pouring concrete after pouring on site;

The shear bearing capacity of the bearing wall panel is greater than or equal to the shear bearing capacity of the post-cast concrete of equal thickness, and the inner surface of the bearing wall panel is provided with a number of I-shaped anchors. The length of the font anchors protruding from the inner surface of the bearing wall panel is greater than or equal to 20mm.

Preferably, the hat-shaped connector includes a connecting plate embedded in the bearing wall plate and a bolt mounting plate for installing the fastening bolts, and the bolt mounting plate protrudes from the bearing wall plate inner surface settings.

Preferably, the surface of the connecting plate is provided with a steel mesh sheet, and the steel mesh sheet is used to enhance the bonding between the connecting plate and the bearing wall plate.

Preferably, the surface of the wing plate is provided with a steel mesh sheet, the steel mesh sheet is used to enhance the bonding between the wing plate and the bearing wall plate, and the mesh size of the steel mesh sheet is larger than that of the The cross-sectional dimension of the web rod.

Preferably, the bearing wall panels include high-strength cement fiber boards, steel fiber reinforced concrete boards, polyethylene fiber reinforced concrete boards, polyethanol fiber reinforced concrete boards, hybrid fiber reinforced concrete boards, steel mesh cement fiber boards and high-strength fine stone concrete panels. The thickness of the force wall panel is 10mm-50mm.

Preferably, it also includes a spacer, the spacer is used to separate the inner surface of the bearing wall panel and the outer surface of the reinforcement cage, the spacer includes a clip-type spacer clamped on the reinforcement cage and The annular spacer is sleeved on the outside of the web rod.

Preferably, it also includes an insulation layer disposed between the bearing wall panel and the upper distribution steel bars, the surface of the insulation layer is not in contact with the outer surface of the upper distribution steel bars, so that the upper distribution steel bars Completely encased in the post-cast concrete.

A construction method for the prefabricated combined shear wall described in any of the above, comprising:

Use tie bars to connect the upper distribution steel bar and the lower distribution steel bar to form a reinforcement cage;

Parallel load-bearing wall panels are placed on both sides of the reinforcement cage, one of the load-bearing wall panels is pre-embedded with a T-shaped connector, and the other of the load-bearing wall panels is pre-embedded with a hat type connector;

Use fastening bolts to connect the T-shaped connector and the hat-shaped connector to connect the reinforcement cage and the bearing wall panels on both sides, and fill the concave part of the hat-shaped connector with grout , to complete the assembly of prefabricated walls;

The prefabricated wall body is transported and hoisted to the construction position, the prefabricated wall body and the edge members of each layer are connected, and concrete is poured after pouring.

Preferably, the web rod of the T-shaped connector is located at the intersection of the reinforcement bars of the reinforcement cage, and the web rod is bound or welded to the reinforcement cage.

The prefabricated combined shear wall provided by the present invention uses positioning connectors to connect the steel cage and the bearing wall panels on both sides, and the bearing wall panels on both sides are cavities. The pouring greatly reduces the quality of the prefabricated wall, facilitates the transportation and hoisting of the prefabricated wall, and effectively reduces the transportation and hoisting cost of the prefabricated combined shear wall.

At the same time, the bearing wall panels can jointly bear the seismic shear force with the steel cage and post-cast concrete, which improves the seismic bearing capacity of the prefabricated composite shear wall, and also avoids the process of form support and form removal during the post-cast concrete pouring. It is beneficial to speed up the construction progress, save the cost of formwork, leasing, and labor required for disassembly and assembly, and the overall connection reliability and construction convenience are higher.

In addition, the present invention also provides a construction method for the above-mentioned prefabricated combined shear 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 1 of a prefabricated combined shear wall provided by the present invention;

Fig. 2 is the structural schematic diagram of the specific embodiment 2 of the prefabricated combined shear wall provided by the present invention;

3 is a schematic structural diagram of a specific embodiment 3 of the prefabricated combined shear wall provided by the present invention;

4 is a schematic structural diagram of a specific embodiment 4 of the prefabricated combined shear wall provided by the present invention;

Fig. 5 is the structural schematic diagram of the prefabricated wall body of the prefabricated combined shear wall provided by the present invention;

6 is a schematic diagram of the distribution of positioning connectors and tie bars in the prefabricated combined shear wall provided by the present invention;

Fig. 7 is the assembly schematic diagram of the prefabricated wall body and the L-shaped edge member of the prefabricated combined shear wall provided by the present invention;

Fig. 8 is the front view schematic diagram of the reinforcement cage of the L-shaped edge member in Fig. 7;

9 is an assembly schematic diagram of the prefabricated wall body and the L-shaped edge member of the prefabricated combined shear wall provided by the present invention in another assembly manner;

Figure 10 is a schematic front view of the reinforcement cage of the L-shaped edge member in Figure 9;

Fig. 11 is the assembly schematic diagram of the prefabricated wall body and the in-line edge member of the prefabricated composite shear wall provided by the present invention;

Fig. 12 is the assembly schematic diagram of the prefabricated wall body and the T-shaped edge member of the prefabricated combined shear wall provided by the present invention;

Figure 13 is a schematic front view of the reinforcing cage of the T-shaped edge member in Figure 12;

14 is a schematic structural diagram of the positioning connector of the prefabricated combined shear wall provided by the present invention;

FIG. 15 is a schematic cross-sectional view of the T-shaped connector in FIG. 14 .

In Figures 1-15:

101 is the T-shaped connector, 102 is the hat-shaped connector, 103 is the fastening bolt, 2 is the upper distribution steel bar, 3 is the lower distribution steel bar, 4 is the tie bar, 5 is the truss steel bar, 6 is the bearing wall panel, 7 is the cavity, 8 is the insulation layer, 9 is the steel mesh, 10 is the pad, 11 is the edge member, 111 is the longitudinal reinforcement, 112 is the stirrup, 12 is the template, and 13 is the horizontal connecting 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 prefabricated combined shear wall, which uses positioning connectors to tie the steel cage and the load-bearing wall panels on both sides, and there is a cavity between the two load-bearing wall panels, which greatly reduces the need for prefabricated walls. The quality of the prefabricated wall is convenient for transportation and hoisting.

In addition, the present invention also provides a construction method for the above-mentioned prefabricated combined shear wall.

Please refer to Figure 1-Figure 15.

The prefabricated combined shear wall provided by the present invention includes distribution steel bars 2 on the upper layer, distribution steel bars 3 on the lower layer, two mutually parallel load-bearing wall panels 6 and several positioning connectors. The positioning connectors include a T-shaped connector 101, a cap T-shaped connector 102 and fastening bolts 103, the wings of the T-shaped connector 101 are embedded in the bearing wall panel 6 on one side, and the hat-shaped connector 102 is embedded in the bearing wall panel 6 on the other side;

The upper distribution steel bars 2 and the lower distribution steel bars 3 are connected by the tie bars 4 to form a steel cage, the steel cage is set between the two bearing wall panels 6, and the web rod of the T-shaped connector 101 runs through the thickness direction of the steel cage. ;

The fastening bolts 103 pass through the through holes of the hat-shaped connector 102 and are threadedly connected to the web rod of the T-shaped connector 101, so as to enclose the cavity 7 for pouring concrete after pouring on site;

The shear bearing capacity of the bearing wall panel 6 is greater than or equal to the shear bearing capacity of the post-cast concrete of equal thickness. The inner surface of the bearing wall panel 6 is provided with several I-shaped anchors, and the I-shaped anchors extend out. The length of the inner surface of the bearing wall panel 6 is greater than or equal to 20 mm.

Please refer to FIG. 14 and FIG. 15 , the positioning connector includes a T-shaped connector 101 embedded in the bearing wall panel 6 on one side, a hat-shaped connector 102 embedded in the bearing wall panel 6 on the other side, and a connection The two fastening bolts 103.

Please refer to FIG. 15 , the T-connector 101 includes a wing plate and a web bar vertically connected to the wing plate. The end of the web bar away from the wing plate is provided with threaded holes for installing the fastening bolts 103; The bolt tightening force on each position is relatively uniform. Usually, the web rod is vertically connected to the center of the flange, and the threaded hole is located in the center of the web rod.

The geometric shapes of the wing plate and the web rod are not limited and can be determined according to the actual construction needs. For example, the wings can be configured as circles, rectangles, triangles, etc., and the webs can be configured as prisms, cylinders, truncated cones, and the like.

In order to enhance the bonding between the T-shaped connector 101 and the bearing wall panel 6, preferably, the surface of the wing plate of the T-shaped connector 101 may be provided with a steel mesh sheet 9, and the mesh size of the steel mesh sheet 9 is larger than that of the web The cross-sectional dimension of the rod.

The hat-shaped connector 102 is an inverted hat-shaped, preferably, please refer to FIG. 14 , the hat-shaped connector 102 includes a connecting plate embedded in the bearing wall panel 6 and a bolt mounting plate for installing the fastening bolts 103 , the bolt mounting plate protrudes from the inner surface of the bearing wall panel 6 . Specifically, the bolt mounting plate can be provided in a cylindrical shape, a prismatic shape, an inverted groove shape, an inverted cup shape, and the like.

It should be noted that, in order to fix the relative position of the lower distribution steel bar 3 and the hat-shaped connector 102 and prevent the lower distribution steel bar 3 from moving during transportation, the lower distribution steel bar 3 is usually set to abut on the inner surface of the bolt mounting plate, Therefore, the height of the bolt mounting plate protruding from the inner surface of the bearing wall plate 6 determines the thickness of the post-cast concrete between the lower distribution steel bars 3 and the bearing wall plate 6 .

Therefore, the height of the bolt mounting plate protruding from the bearing wall plate 6 should ensure that the lower distribution steel bars 3 can be fully wrapped by the post-cast concrete.

Of course, a spacer 10 can also be set between the lower distribution steel bar 3 and the bolt mounting plate, and the spacer block 10 is sleeved outside the web rod of the T-connector 101, so that the thickness of the spacer block 10 can be adjusted to adjust the lower distribution steel bar 3 to The distance from the inner surface of the bearing wall panel 6 .

In order to enhance the bonding between the hat-shaped connector 102 and the bearing wall panel 6, preferably, the surface of the connecting panel may be provided with a steel mesh sheet 9 to enhance the bonding between the two by increasing the contact area.

The specific material, shape and size of the steel mesh sheet 9 on the surface of the wing plate of the T-shaped connector 101 and the steel mesh sheet 9 on the surface of the connecting plate of the hat-shaped connector 102 are determined according to actual construction needs, and will not be repeated here.

Considering that both the T-shaped connector 101 and the hat-shaped connector 102 are embedded in the bearing wall panel 6, in order to prevent the corrosion of the positioning connector, choose stainless steel, titanium alloy, high-strength plastic and Hastelloy and other high-strength corrosion-resistant materials to make The above-mentioned positioning connector.

The fastening bolts 103 pass through the through holes of the hat-shaped connector 102 and are connected to the threaded holes of the T-shaped connector 101, and the lateral pressure of the post-cast concrete on the bearing wall panels 6 on both sides is directly transmitted to the T-shaped connector 101 during site pouring On the web of the T-connector 101, the force on the wing plate of the T-connector 101 is extremely small; therefore, part of the tightening force of the fastening bolt 103 is used to resist the tension of the web of the T-connector 101, and the other part is used to tie the two sides The bearing wall panel 6.

Most of the fastening bolts 103 use hexagon socket head bolts. The size of the bolt head of the fastening bolts 103 should be smaller than the outer diameter of the bolt installation plate and larger than the diameter of the through hole on the bolt installation plate to prevent the post-cast concrete from overflowing. If the size of the bolt head of the fastening bolt 103 is smaller than the diameter of the through hole of the bolt mounting plate, a backing plate with a size larger than the through hole of the bolt mounting plate needs to be arranged between the two.

The backing plate can be made of any material with a certain bending rigidity such as steel, plastic, alloy, etc., and its shape can be set to any geometric shape such as circle and diamond, as long as it can be installed in the bolt mounting plate.

The specific types, materials, shapes and sizes of the T-shaped connector 101 , the hat-shaped connector 102 and the fastening bolt 103 are determined according to the design strength requirements of the actual construction, and will not be repeated here.

For example, the strength and stiffness of the web bar of the T-shaped connector 101 should be greater than or equal to the strength and stiffness of the upper and lower distribution bars 3; the compressive strength of the hat-shaped connector 102 and the tensile strength of the fastening bolts 103 should be greater than or equal to The maximum lateral pressure of the post-cast concrete on the bearing wall panel 6.

The upper distribution steel bar 2 and the lower distribution steel bar 3 are connected by the tie bars 4 to form the steel skeleton of the prefabricated seismic shear wall; the upper distribution steel bar 2 and the lower distribution steel bar 3 are both composed of multiple horizontal steel bars and multiple vertical steel bars. As shown in Figure 6, of course, the upper and lower distribution steel bars can also be set as steel mesh sheets, and the specific material, type and size are determined according to the design strength requirements of the actual construction, and will not be repeated here.

The upper and lower distributed steel bars are arranged in parallel with the load-bearing wall panels 6 on both sides respectively. In order to ensure that the upper and lower distributed steel bars can be completely wrapped by the post-cast concrete, the upper and lower distributed steel bars should be at a certain distance from the inner surface of the load-bearing wall panels 6 .

Please refer to FIG. 1-FIG. 4, preferably, it also includes a spacer 10 for separating the inner surface of the bearing wall panel 6 and the outer surface of the reinforcement cage. The spacer 10 includes a card-type spacer that is clamped on the reinforcement cage. and an annular spacer that is sleeved on the outside of the web rod of the T-shaped connector 101 . The specific thickness of the cushion block 10 is determined according to the actual construction needs, as long as it is ensured that the reinforcement cage can be completely wrapped by the post-cast concrete.

The upper and lower hooks of the tie bars 4 are bound or welded to the upper and lower distribution steel bars respectively. Please refer to Figure 6. The tie bars 4 are distributed on the steel cage in a plum blossom shape, so as to effectively tie the upper and lower distribution steel bars.

Of course, truss steel bars 5 can also be used to replace the tie bars 4. As shown in FIG. 2, the truss steel bars 5 include at least one upper-layer steel bar bound or welded to the upper-layer distribution steel bar 2 and at least two lower-layer distribution steel bars 3. Welded and connected lower reinforcements, upper reinforcements and lower reinforcements are successively welded and formed through steel wires, steel bars or steel strands to form an N-shaped or M-shaped structure; truss reinforcement 5 is uniformly arranged along the length direction of the prefabricated combined shear wall , the spacing between two adjacent truss steel bars 5 is usually set to 200-800mm.

In order to prevent the reinforcement cage from moving during transportation, the web rod of the T-shaped connector 101 is usually set to connect with the reinforcement cage. Preferably, the web rod of the T-shaped connector 101 can be set at the intersection of the reinforcement bars of the reinforcement cage, and the web rod and the reinforcement cage are bound or welded to enhance the stability of the connection between the two.

The two load-bearing wall panels 6 are arranged in parallel outside the reinforcement cage, on the one hand, they can be used as templates for post-cast concrete pouring, and on the other hand, the load-bearing wall panels 6 can be deformed and co-stressed with the reinforcement cage and post-cast concrete. Effectively enhance the overall bearing capacity of the prefabricated combined shear wall.

In order to avoid peeling damage between the bearing wall panel 6 and the post-cast concrete, the shear bearing capacity of the bearing wall panel 6 needs to be greater than or equal to the shear bearing capacity of the post-cast concrete of equal thickness, and the The inner surface is provided with I-shaped anchors to enhance the bond between the bearing wall panel 6 and the post-cast concrete.

In order to further ensure the effective engagement between the bearing wall panel 6 and the post-cast concrete, the inner surface of the bearing wall panel 6 may be provided with brushed and/or concave-convex grooves, the depth of which is greater than or equal to 3 mm.

Preferably, the bearing wall panel 6 may include high-strength cement fiber board, steel fiber reinforced concrete board, polyethylene fiber reinforced concrete board, polyethanol fiber reinforced concrete board, hybrid fiber reinforced concrete board, steel mesh cement fiber board and high-strength fine stone concrete panel. The thickness of the plate 6 is 10mm-50mm. The fiber material can be set to be one or more of a variety of fibers such as carbon fiber, basalt fiber, glass fiber, polyethylene fiber, and polyethanol fiber.

The bearing wall panel 6 is not only provided with a connector mounting hole for the pre-embedded cap-type connector 102, but also can be provided with a mold mounting hole for placing the mold for the opening of the pipe or the mold for the opening of the door and window, so as to be laid in the prefabricated combined shear wall. Pipelines or opening doors and windows. The specific positions of the mounting holes of the connector and the mounting holes of the mold are determined according to the design and planning of the prefabricated combined shear wall, and will not be repeated here.

During prefabrication, firstly, the upper distribution steel bar 2 and the lower distribution steel bar 3 are connected by tie bars 4 to form a reinforcement cage; then parallel bearing wall panels 6 are placed on both sides of the reinforcement cage, and one One is pre-embedded with a T-shaped connector 101, and the other is pre-embedded with a hat-shaped connector 102; finally, the T-shaped connector 101 and the hat-shaped connector 102 are connected by fastening bolts 103 to connect the reinforcement cage and the The bearing wall plate 6 is filled, and the concave part of the hat-shaped connector 102 is filled with grout to complete the assembly of the prefabricated wall.

After the prefabricated walls are transported and hoisted to the design and construction position, the prefabricated walls of each layer and the edge members 11 are connected, and concrete is poured after pouring.

It should be noted that when each layer of prefabricated wall/edge member 11 is connected, a connecting section steel with studs on the surface or a steel plate with studs on the surface can be inserted into the cavities 7 of the upper and lower layers to strengthen the The shear bearing capacity of the connection interface simplifies the construction process.

In addition, when the prefabricated wall is multi-layered, the cavity 7 of each prefabricated wall can be poured in layers, and high-strength ductile concrete with better fluidity can be poured in the prefabricated wall of the lowest layer to enhance the overall Compressive, flexural and shear capacity.

In this embodiment, the steel cage and the bearing wall panels 6 on both sides are connected by positioning connectors, and the bearing wall panels 6 on both sides are cavities 7, and the post-cast concrete is poured on site after the prefabricated wall is installed in place, The mass of the prefabricated wall is greatly reduced, the transportation and hoisting of the prefabricated wall are facilitated, and the transportation and hoisting cost of the prefabricated combined shear wall is effectively reduced.

At the same time, the bearing wall plate 6 can jointly bear the seismic shear force with the steel cage and the post-cast concrete, which improves the seismic bearing capacity of the prefabricated combined shear wall, and also avoids the form-supporting and form-removal process when the post-cast concrete is poured. It is beneficial to speed up the construction progress, save the cost of formwork, leasing, and labor required for disassembly and assembly, and the overall connection reliability and construction convenience are higher.

On the basis of the above-mentioned embodiment, please refer to FIG. 3 , the prefabricated combined shear wall also includes an insulating layer 8 arranged between the bearing wall panel 6 and the upper distribution steel bar 2 , and the surface of the insulating layer 8 is connected to the upper distribution steel bar 2 . The outer surface of the steel plate is not in contact, so that the upper distribution steel bar 2 is completely wrapped in 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, and the distance from the thermal insulation layer 8 to the outer surface of the upper distribution steel bars 2 is determined according to actual construction needs, and will not be repeated here.

In the present embodiment, a certain distance is reserved between the thermal insulation layer 8 and the upper distribution steel bar 2, which is beneficial to wrap the upper distribution steel bar 2 in the post-cast concrete, so that the upper layer distribution steel bar 2 and the post-cast concrete can be co-stressed.

Of course, the thermal insulation layer 8 can also be arranged between the bearing wall panel 6 and the lower distribution steel bars 3, as shown in FIG. Reinforcing bars 3 are completely encased in post-cast concrete.

In addition to the above-mentioned prefabricated composite shear walls, the present invention also provides a construction method for the prefabricated composite shear walls disclosed in the above embodiments, the construction method comprising:

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

In step S2, parallel load-bearing wall panels 6 are placed on both sides of the reinforcement cage, one of the load-bearing wall panels 6 is pre-embedded with a T-shaped connector 101, and the other of the load-bearing wall panels 6 is pre-embedded with a cap. type connector 102;

Step S3, use the fastening bolts 103 to connect the T-shaped connector 101 and the hat-shaped connector 102 to connect the reinforcement cage and the bearing wall panels 6 on both sides, and fill the concave part of the hat-shaped connector 102 with grout to complete the process. Assembly of prefabricated walls;

In step S4, the prefabricated walls are transported and hoisted to the construction position, the prefabricated walls of each layer and the edge members 11 are connected, and concrete is poured after pouring.

It should be explained in step S2 that, in order to reduce the displacement of the reinforcement cage during transportation, the web rod of the T-shaped connector 101 is bound or welded to the reinforcement cage.

Preferably, the web rod of the T-shaped connector 101 can be set at the intersection of the reinforcement bars of the reinforcement cage, and the web rod is bound or welded to the reinforcement 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 distribution rebars. Connecting the web bar of the T-shaped connector 101 here can effectively connect the fixed rebar cage and the positioning connector.

It should be noted that in step S4, the edge member 11 includes L-shaped edge members, straight-shaped edge members, T-shaped edge members and cross-shaped edge members, etc. There are mainly two ways of connecting the prefabricated wall and the edge member 11. :

First, the reinforcement cage of the edge member 11 and the reinforcement cage of the prefabricated wall are formed into a whole and prefabricated together in the factory, as shown in Figure 9, Figure 11 and Figure 12;

Second, as shown in FIG. 7 , the longitudinal bars 111 and the stirrups 112 of the edge member 11 are individually bound to form a reinforcement cage, which can be prefabricated separately in the factory or constructed on site; the reinforcement cage of the edge member 11 is placed so that it is There is a gap between the prefabricated wall and the prefabricated wall, so as to improve the fault tolerance rate during the hoisting of the prefabricated wall and facilitate the operation of construction personnel; The horizontal connecting steel bars 13 are evenly placed in the gap, and then the formwork 12 is supported and concrete is poured after pouring.

The type of post-cast concrete to be poured can be determined according to the horizontal width of the cavity 7. When the horizontal width of the cavity 7 is greater than or equal to 200mm, ordinary concrete can be poured; otherwise, self-compacting concrete or fine stone concrete needs to be poured.

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 prefabricated combined shear wall and its construction method 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 prefabricated combined shear wall is characterized by comprising upper-layer distributed steel bars, lower-layer distributed steel bars, two parallel bearing wall plates and a plurality of positioning connecting pieces, wherein each positioning connecting piece comprises a T-shaped connecting piece, a cap-shaped connecting piece and a fastening bolt;

the upper-layer distributed steel bars and the lower-layer distributed steel bars are connected through tie bars to form a steel bar cage, the steel bar cage is arranged between the two bearing wall plates, and web members of the T-shaped connecting piece penetrate through the thickness direction of the steel bar cage;

the fastening bolt penetrates through the through hole of the cap-shaped connecting piece to be in threaded connection with the web member so as to form a cavity for casting post-cast concrete in site;

the shear-resistant bearing capacity of the bearing wall board is larger than or equal to that of the post-cast concrete with equal thickness, a plurality of I-shaped anchors are arranged on the inner surface of the bearing wall board, and the length of the I-shaped anchors extending out of the inner surface of the bearing wall board is larger than or equal to 20 mm.

2. The prefabricated combined shear wall of claim 1, wherein the hat-type connector comprises a connecting plate embedded in the stressed wall panel and a bolt mounting plate for mounting the fastening bolt, the bolt mounting plate being disposed to protrude from the inner surface of the stressed wall panel.

3. The prefabricated combined shear wall of claim 2, wherein the surface of the connecting plate is provided with a steel wire mesh for enhancing the bonding of the connecting plate and the bearing wall plate.

4. The prefabricated combined shear wall of claim 1, wherein a steel mesh is arranged on the surface of the wing plate, the steel mesh is used for enhancing the bonding of the wing plate and the bearing wall plate, and the mesh size of the steel mesh is larger than the cross-sectional size of the web member.

5. The precast combined shear wall of claim 1, wherein the force bearing wall boards comprise high-strength cement fiber boards, steel fiber concrete boards, polyethylene fiber concrete boards, polyvinyl alcohol fiber concrete boards, hybrid fiber concrete boards, steel wire mesh cement fiber boards and high-strength fine stone concrete panels, and the thickness of the force bearing wall boards is 10mm-50 mm.

6. The prefabricated combined shear wall of any one of claims 1 to 5, further comprising a spacer block for separating the inner surface of the force bearing wall plate from the outer surface of the reinforcement cage, wherein the spacer block comprises a clamping spacer block clamped on the reinforcement cage and an annular spacer block sleeved outside the web members.

7. The prefabricated combined shear wall according to any one of claims 1 to 5, further comprising an insulating layer arranged between the force bearing wall boards and the upper-layer distributed steel bars, wherein the surface of the insulating layer is not in contact with the outer surface of the upper-layer distributed steel bars, so that the upper-layer distributed steel bars are completely wrapped in the post-cast concrete.

8. A construction method for a prefabricated modular shear wall according to any one of claims 1 to 7, comprising:

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

placing parallel bearing wall plates on two sides of the reinforcement cage, wherein a T-shaped connecting piece is pre-embedded in one of the bearing wall plates, and a cap-shaped connecting piece is pre-embedded in the other of the bearing wall plates;

connecting the T-shaped connecting piece and the hat-shaped connecting piece by using a fastening bolt to connect the reinforcement cage and the bearing wallboards on two sides, and filling grout in the concave part of the hat-shaped connecting piece to complete the assembly of the prefabricated wall body;

and (3) transporting and hoisting the prefabricated wall body to a construction position, connecting each layer of the prefabricated wall body and the edge member, and pouring post-cast concrete.

9. The construction method according to claim 8, wherein the web members of the T-shaped connecting member are located at the intersection of the steel bars of the steel reinforcement cage, and the web members are bound or welded with the steel reinforcement cage.

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