CN115075436A - Prefabricated combined shear wall and construction method thereof - Google Patents

Prefabricated combined shear wall and construction method thereof Download PDF

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Publication number
CN115075436A
CN115075436A CN202210768334.8A CN202210768334A CN115075436A CN 115075436 A CN115075436 A CN 115075436A CN 202210768334 A CN202210768334 A CN 202210768334A CN 115075436 A CN115075436 A CN 115075436A
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China
Prior art keywords
connecting piece
bearing wall
shaped connecting
wall
prefabricated
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CN202210768334.8A
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Chinese (zh)
Inventor
陈云
刘玉博
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Hainan University
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Hainan University
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Priority to CN202210768334.8A priority Critical patent/CN115075436A/en
Publication of CN115075436A publication Critical patent/CN115075436A/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/84—Walls made by casting, pouring, or tamping in situ
    • E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/84—Walls made by casting, pouring, or tamping in situ
    • E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
    • E04B2/8623—Walls made by casting, pouring, or tamping in situ made in permanent forms with spacers and at least one form leaf being monolithic
    • E04B2/8629—Walls made by casting, pouring, or tamping in situ made in permanent forms with spacers and at least one form leaf being monolithic with both form leaves and spacers being monolithic
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work

Abstract

The invention relates to the field of fabricated buildings, and discloses a prefabricated combined shear wall and a construction method thereof, wherein the prefabricated combined shear wall comprises upper-layer distributed steel bars, lower-layer distributed steel bars, two parallel bearing wall plates and a plurality of positioning connecting pieces, each positioning connecting piece comprises a T-shaped connecting piece, a cap-shaped connecting piece and a fastening bolt, and a wing plate and a cap-shaped connecting piece of the T-shaped connecting piece are respectively embedded in the two bearing wall plates; the upper layer of distributed steel bars and the lower layer of distributed steel bars are connected to form a steel bar cage, and the steel bar cage is arranged between the two bearing wall plates; the web member of the T-shaped connecting piece penetrates through the thickness direction of the steel reinforcement cage, and 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 enclose a cavity for pouring post-cast concrete; the shear-resistant bearing capacity of the bearing wall board is greater than or equal to that of post-cast concrete with equal thickness, and the inner surface of the bearing wall board is provided with a plurality of I-shaped anchors, so that the wall quality is reduced, and the wall is convenient to transport and hoist.

Description

Prefabricated combined shear wall and construction method thereof
Technical Field
The invention relates to the technical field of assembly type buildings, in particular to a prefabricated combined type shear wall. In addition, the invention also relates to a construction method for the prefabricated combined shear wall.
Background
The prefabricated concrete building is a concrete structure type building which is designed and constructed in a field assembly mode by mainly taking a reinforced concrete prefabricated part produced in a factory.
At present, common assembly type concrete shear wall structures, such as all prefabricated shear wall structures and assembly type integral double-faced superposed concrete shear wall structures, have more prefabricated parts, are large in mass, need to transport and hoist components by using large-scale transport equipment and large-scale hoisting equipment, and have higher transportation and hoisting costs.
In summary, how to reduce the quality of the prefabricated wall of the fabricated concrete shear wall and enhance the overall connection reliability and construction convenience is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a prefabricated combined shear wall, in which a positioning connector is utilized to tie a reinforcement cage and two side bearing wall plates, and a cavity is formed between the two bearing wall plates, so that the quality of the prefabricated wall body is greatly reduced, and the transportation and hoisting of the prefabricated wall body are facilitated.
In addition, the invention also provides a construction method for the prefabricated combined shear wall.
In order to achieve the above purpose, the invention provides the following technical scheme:
a prefabricated combined shear wall comprises 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.
Preferably, the hat-shaped connecting piece comprises a connecting plate embedded in the bearing wall board and a bolt mounting plate for mounting the fastening bolt, and the bolt mounting plate is arranged to protrude out of the inner surface of the bearing wall board.
Preferably, the surface of the connecting plate is provided with a steel wire mesh, and the steel wire mesh is used for enhancing the bonding between the connecting plate and the bearing wall plate.
Preferably, the surface of the wing plate is provided with a steel wire mesh, the steel wire mesh is used for enhancing the bonding of the wing plate and the bearing wall plate, and the mesh size of the steel wire mesh is larger than the cross section size of the web member.
Preferably, the bearing wall board comprises a high-strength cement fiber board, a steel fiber concrete board, a polyethylene fiber concrete board, a polyvinyl alcohol fiber concrete board, a hybrid fiber concrete board, a steel wire mesh cement fiber board and a high-strength fine aggregate concrete panel, and the thickness of the bearing wall board is 10-50 mm.
Preferably, still include the cushion, the cushion is used for separating the internal surface of strength bearing wallboard with the surface of steel reinforcement cage, the cushion includes the card cushion of joint on the steel reinforcement cage and the cover is located annular cushion outside the web member.
Preferably, the concrete post-cast concrete further comprises a heat insulation layer arranged between the bearing wall plate and the upper-layer distributed steel bars, and the surface of the heat insulation 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.
A construction method for a prefabricated modular shear wall according to any one of the preceding claims, 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.
Preferably, the web member of the T-shaped connecting piece is located at a steel bar intersection of the steel bar cage, and the web member is bound or welded with the steel bar cage.
According to the prefabricated combined shear wall provided by the invention, the positioning connecting piece is used for connecting the steel reinforcement cage and the bearing wall plates on two sides, the bearing wall plates on two sides are provided with the cavities, and the post-cast concrete is cast in situ after the prefabricated wall body is installed in place, so that the quality of the prefabricated wall body is greatly reduced, the prefabricated wall body is convenient to transport and hoist, and the transportation and hoisting cost of the prefabricated combined shear wall is effectively reduced.
Meanwhile, the force bearing wall plate can bear earthquake shearing force together with the steel reinforcement cage and post-cast concrete, the earthquake-resistant bearing capacity of the prefabricated combined type shear wall is improved, formwork supporting and formwork removing processes during post-cast concrete pouring are also avoided, the construction progress is accelerated, the template manufacturing cost, the renting cost and the labor cost required by dismounting are saved, and the integral connection reliability and the construction convenience are higher.
In addition, the invention also provides a construction method for the prefabricated combined shear wall.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a prefabricated combined shear wall according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of a prefabricated combined shear wall provided by the invention;
fig. 3 is a schematic structural diagram of a third embodiment of a prefabricated combined shear wall provided by the invention;
fig. 4 is a schematic structural diagram of a fourth embodiment of a prefabricated combined shear wall provided by the invention;
FIG. 5 is a schematic structural diagram of a prefabricated wall body of the prefabricated combined shear wall provided by the invention;
FIG. 6 is a schematic view of the positioning and connecting members and tie bars in the prefabricated shear wall of the present invention;
FIG. 7 is a schematic view of the assembly of a prefabricated wall body and an L-shaped edge member of the prefabricated combined shear wall according to the present invention;
FIG. 8 is a schematic front view of the reinforcement cage of the L-shaped edge member of FIG. 7;
FIG. 9 is a schematic view of the assembly of the prefabricated wall body and the L-shaped edge member of the prefabricated combined shear wall according to another assembly method;
FIG. 10 is a schematic front view of the reinforcement cage of the L-shaped edge member of FIG. 9;
FIG. 11 is a schematic view of the assembly of a prefabricated wall body and a linear edge member of the prefabricated combined shear wall of the present invention;
FIG. 12 is a schematic view of the assembly of a prefabricated wall body and T-shaped edge members of the prefabricated shear wall according to the present invention;
FIG. 13 is a front view of the reinforcement cage of the T-shaped edge member of FIG. 12;
FIG. 14 is a schematic view of a locating connector for a prefabricated modular shear wall according to the present invention;
fig. 15 is a cross-sectional view of the T-connector of fig. 14.
In fig. 1-15:
101 is T-shaped connecting piece, 102 is hat type connecting piece, 103 is fastening bolt, 2 is upper distribution reinforcing bar, 3 is lower floor distribution reinforcing bar, 4 is tie bar, 5 is truss reinforcing bar, 6 is bearing wallboard, 7 is the cavity, 8 is the heat preservation, 9 is the steel wire net piece, 10 is the cushion, 11 edge component, 111 is vertical muscle, 112 is the stirrup, 12 is the template, 13 is the horizontal connection reinforcing bar.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the invention is to provide a prefabricated combined shear wall, a positioning connecting piece is utilized to tie the steel reinforcement cage and the bearing wall boards on the two sides, a cavity is formed between the two bearing wall boards, the quality of the prefabricated wall body is greatly reduced, and the transportation and the hoisting of the prefabricated wall body are facilitated.
In addition, the invention also provides a construction method for the prefabricated combined shear wall.
Please refer to fig. 1-15.
The invention provides a prefabricated combined shear wall, which comprises upper-layer distributed steel bars 2, lower-layer distributed steel bars 3, two parallel bearing wall plates 6 and a plurality of positioning connecting pieces, wherein each positioning connecting piece comprises a T-shaped connecting piece 101, a cap-shaped connecting piece 102 and a fastening bolt 103, a wing plate of the T-shaped connecting piece 101 is pre-embedded in the bearing wall plate 6 on one side, and the cap-shaped connecting piece 102 is pre-embedded in the bearing wall plate 6 on the other side;
the upper-layer distributed steel bars 2 and the lower-layer distributed steel bars 3 are connected through tie bars 4 to form a steel bar cage, the steel bar cage is arranged between the two bearing wall plates 6, and web members of the T-shaped connecting piece 101 penetrate through the thickness direction of the steel bar cage;
the fastening bolt 103 penetrates through the through hole of the cap-shaped connecting piece 102 to be in threaded connection with the web member of the T-shaped connecting piece 101 so as to enclose the cavity 7 for casting post-cast concrete in situ;
the shear-resistant bearing capacity of the bearing wall plate 6 is larger than or equal to that of post-cast concrete with equal thickness, a plurality of I-shaped anchors are arranged on the inner surface of the bearing wall plate 6, and the length of the I-shaped anchors extending out of the inner surface of the bearing wall plate 6 is larger than or equal to 20 mm.
Referring to fig. 14 and 15, the positioning connector includes a T-shaped connector 101 pre-embedded in the bearing wall plate 6 on one side, a cap-shaped connector 102 pre-embedded in the bearing wall plate 6 on the other side, and a fastening bolt 103 connecting the two.
Referring to fig. 15, the T-shaped connecting member 101 includes a wing plate and a web member vertically connected to the wing plate, and a threaded hole for mounting a fastening bolt 103 is formed at an end of the web member away from the wing plate; in order to make the bolt fastening force applied to the wing plate and the web member relatively uniform in all directions, the web member is generally vertically connected to the center of the wing plate, and the threaded hole is located at the center of the web member.
The geometrical shapes of the wing plate and the web member are not limited and can be determined according to actual construction requirements. For example, the wings may be arranged in a circle, rectangle, triangle, etc., and the web members may be arranged in a prism, cylinder, truncated cone, etc.
In order to enhance the bonding between the T-shaped connecting member 101 and the bearing wall plate 6, preferably, the surface of the wing plate of the T-shaped connecting member 101 may be provided with a steel wire mesh 9, and the mesh size of the steel wire mesh 9 is larger than the cross-sectional size of the web member.
The hat-shaped connector 102 is in the shape of an inverted cap, and preferably, referring to fig. 14, the hat-shaped connector 102 includes a connecting plate pre-embedded in the bearing wall plate 6 and a bolt mounting plate for mounting the fastening bolt 103, and the bolt mounting plate is arranged to protrude from the inner surface of the bearing wall plate 6. The bolt mounting plate can be specifically arranged in a cylindrical shape, a prismatic shape, an inverted groove shape, an inverted cup shape and the like.
Note that, in order to fix the relative positions of the lower distributed reinforcing steel bars 3 and the hat-shaped connector 102 and prevent the lower distributed reinforcing steel bars 3 from shifting during transportation, the lower distributed reinforcing steel bars 3 are usually disposed to abut against the inner surface of the bolt mounting plate, and therefore the height of the bolt mounting plate protruding from the inner surface of the load-bearing wall plate 6 determines the thickness of the post-cast concrete between the lower distributed reinforcing steel bars 3 and the load-bearing wall plate 6.
Therefore, the height of the bolt mounting plate protruding out of the bearing wall plate 6 should ensure that the lower-layer distribution steel bars 3 can be fully wrapped by the post-cast concrete.
Of course, the spacer 10 may be disposed between the lower distributed steel bar 3 and the bolt mounting plate, and the spacer 10 is sleeved outside the web member of the T-shaped connector 101, so as to adjust the distance from the lower distributed steel bar 3 to the inner surface of the bearing wall plate 6 by changing the thickness of the spacer 10.
In order to enhance the bond between the hat-type connector 102 and the messenger wall panel 6, the surface of the connector plate may preferably be provided with a steel mesh sheet 9 to enhance the bond by increasing the contact area between the two.
The specific materials, shapes and sizes of the steel wire mesh 9 on the surface of the wing plate of the T-shaped connecting piece 101 and the steel wire mesh 9 on the surface of the connecting plate of the cap-shaped connecting piece 102 are determined according to actual construction needs, and are not described herein again.
Considering that the T-shaped connecting piece 101 and the cap-shaped connecting piece 102 are both pre-embedded in the bearing wall plate 6, in order to prevent the positioning connecting piece from being rusted, high-strength corrosion-resistant materials such as stainless steel, titanium alloy, high-strength plastic and Hastelloy are selected to manufacture the positioning connecting piece.
The fastening bolts 103 penetrate through the through holes of the hat-shaped connecting piece 102 to be connected with the threaded holes of the T-shaped connecting piece 101, the lateral pressure of the post-cast concrete to the bearing wall boards 6 on the two sides is directly transmitted to the web members of the T-shaped connecting piece 101 during cast-in-place, and the stress of wing plates of the T-shaped connecting piece 101 is extremely small; therefore, one part of the fastening force of the fastening bolt 103 is used for resisting the tensile force of the web member of the T-shaped connector 101, and the other part is used for pulling and connecting the bearing wall plates 6 on the two sides.
The fastening bolt 103 is mostly a hexagon socket head bolt, and the size of the bolt head of the fastening bolt 103 is smaller than the outer diameter of the bolt mounting plate and larger than the diameter of the through hole on the bolt mounting plate so as to prevent the later poured 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 having a size larger than the through hole of the bolt mounting plate needs to be provided therebetween.
The backing plate can be made of any material with certain bending rigidity, such as steel, plastics, alloy and the like, and the shape of the backing plate can be set to be any geometric shape, such as a circle, a diamond and the like, as long as the backing plate can be installed in the bolt installation plate.
The specific types, materials, shapes and sizes of the T-shaped connector 101, the cap-shaped connector 102 and the fastening bolt 103 are determined according to the design strength requirement of actual construction, and are not described herein again.
For example, the strength and rigidity of the web member of the T-shaped connecting member 101 should be greater than or equal to those of the upper and lower distributed reinforcing bars 3; the compression strength of the hat-shaped connecting piece 102 and the tensile strength of the fastening bolt 103 are both greater than the maximum lateral pressure of the post-cast concrete to the bearing wall plate 6.
The upper-layer distributed steel bars 2 and the lower-layer distributed steel bars 3 are connected through tie bars 4 to form a steel bar framework of the prefabricated anti-seismic shear wall; upper strata distribution reinforcing bar 2 and lower floor distribution reinforcing bar 3 are the reinforcing bar net of compriseing many horizontal reinforcement and many vertical reinforcing bars, as shown in fig. 6, of course, upper and lower floor distribution reinforcing bar also can set up to the reinforcing bar net piece, and its specific material, kind and size are confirmed according to the design intensity requirement of actual construction, and no longer give unnecessary details here.
Upper and lower floor's distribution reinforcing bar is respectively with the bearing wallboard 6 parallel arrangement of both sides, in order to guarantee that upper and lower floor's distribution reinforcing bar can be by post-cast concrete parcel completely, upper and lower floor's distribution reinforcing bar should be apart from the internal surface certain distance of bearing wallboard 6.
Referring to fig. 1-4, it is preferable that the cushion block 10 is used for separating the inner surface of the force bearing wall plate 6 from the outer surface of the reinforcement cage, and the cushion block 10 includes a clip-type cushion block clipped on the reinforcement cage and an annular cushion block sleeved outside the web member of the T-shaped connector 101. The specific thickness of the cushion block 10 is determined according to actual construction needs, and only the reinforcement cage can be completely wrapped by the post-cast concrete.
The upper and lower hooks of the tie bar 4 are respectively bound or welded with the upper and lower distributed steel bars, and referring to fig. 6, the tie bar 4 is distributed on the reinforcement cage in a plum blossom shape to effectively tie the upper and lower distributed steel bars.
Of course, the truss reinforcing steel bars 5 can be used to replace the tie bars 4, as shown in fig. 2, the truss reinforcing steel bars 5 include at least one upper layer reinforcing steel bar bound or welded with the upper layer distribution reinforcing steel bar 2 and at least two lower layer reinforcing steel bars bound or welded with the lower layer distribution reinforcing steel bar 3, and the upper layer reinforcing steel bar and the lower layer reinforcing steel bar are successively welded and connected through steel wires, reinforcing steel bars or steel strands to form an N-shaped or M-shaped structure; the truss reinforcing steel bars 5 are uniformly arranged along the length direction of the prefabricated combined shear wall, and the distance between two adjacent truss reinforcing steel bars 5 is usually set to be 200mm and 800 mm.
To prevent the reinforcement cage from moving during transportation, the web members of the T-connector 101 are typically arranged to engage the reinforcement cage. Preferably, the web member of the T-shaped connecting member 101 is located at the intersection of the steel bars of the steel reinforcement cage, and the web member is bound or welded with the steel reinforcement cage to enhance the connection stability of the web member and the steel reinforcement cage.
The two bearing wall plates 6 are arranged outside the reinforcement cage in parallel, on one hand, the bearing wall plates can be used as templates in post-cast concrete pouring, on the other hand, the bearing wall plates 6 can be coordinated with the reinforcement cage and the post-cast concrete to deform and bear force together, and the whole bearing capacity of the prefabricated combined shear wall can be effectively enhanced.
In order to avoid the peeling damage between the bearing wall plate 6 and the post-cast concrete, the shearing resistance bearing capacity of the bearing wall plate 6 needs to be larger than or equal to that of the post-cast concrete with the same thickness, and the inner surface of the bearing wall plate 6 is provided with an I-shaped anchor to strengthen the bonding between the bearing wall plate 6 and the post-cast concrete.
In order to further ensure the effective occlusion between the bearing wall plate 6 and the post-cast concrete, the inner surface of the bearing wall plate 6 can be provided with galling and/or concave-convex grooves, and the concave-convex depth is more than or equal to 3 mm.
Preferably, the force bearing wall plate 6 can comprise a high-strength cement fiber plate, a steel fiber concrete plate, a polyethylene fiber concrete plate, a polyvinyl alcohol fiber concrete plate, a hybrid fiber concrete plate, a steel wire mesh cement fiber plate and a high-strength fine stone concrete panel, and the thickness of the force bearing wall plate 6 is 10mm-50 mm. The fiber material can be one or more of carbon fiber, basalt fiber, glass fiber, polyethylene fiber, polyvinyl alcohol fiber and the like.
The bearing wall plate 6 is provided with not only a connecting piece mounting hole for embedding the hat-shaped connecting piece 102, but also a mould mounting hole for placing a pipeline opening mould or a door and window opening mould, so that a pipeline can be laid or a door and a window can be opened in the prefabricated combined type shear wall. The specific positions of the connecting piece mounting holes and the die mounting holes are determined according to the design plan of the prefabricated combined shear wall, and are not described herein again.
When in prefabrication production, firstly, the tie bars 4 are utilized to connect the upper-layer distributed steel bars 2 and the lower-layer distributed steel bars 3 to form a steel bar cage; then placing parallel bearing wall plates 6 on two sides of the reinforcement cage, wherein a T-shaped connecting piece 101 is embedded in one of the bearing wall plates 6, and a cap-shaped connecting piece 102 is embedded in the other bearing wall plate; and finally, connecting the T-shaped connecting piece 101 and the cap-shaped connecting piece 102 by using a fastening bolt 103 to connect the reinforcement cage and the bearing wall boards 6 on two sides, and filling slurry into the concave part of the cap-shaped connecting piece 102 to finish the assembly of the prefabricated wall body.
And (3) after the prefabricated wall body is transported and hoisted to the designed construction station, connecting each layer of prefabricated wall body and the edge member 11, and pouring the post-cast concrete.
It should be noted that, when the prefabricated wall bodies/edge members 11 of each layer are connected, connecting section steel with studs on the surface or steel plates with studs on the surface can be inserted into the cavities 7 of the upper and lower layers to enhance the shear-resistant bearing capacity of the connecting interface and simplify the construction process.
In addition, when the prefabricated wall bodies are of multiple layers, the cavity 7 of each prefabricated wall body can be poured in layers, and high-strength ductile concrete with good fluidity is poured in the prefabricated wall body of the lowest layer, so that the overall compression resistance, bending resistance and shear resistance bearing capacity are enhanced.
In the embodiment, the steel reinforcement cage and the bearing wall boards 6 on two sides are connected by the positioning connecting piece, the cavities 7 are formed in the bearing wall boards 6 on two sides, and the post-cast concrete is cast in situ after the prefabricated wall body is installed in place, so that the quality of the prefabricated wall body is greatly reduced, the prefabricated wall body is convenient to transport and hoist, and the transport and hoisting costs of the prefabricated combined shear wall are effectively reduced.
Meanwhile, the force bearing wall plate 6 can bear earthquake shearing force together with the steel reinforcement cage and post-cast concrete, the earthquake-resistant bearing capacity of the prefabricated combined type shear wall is improved, formwork supporting and formwork removing processes during post-cast concrete pouring are also avoided, the construction progress is accelerated, the formwork manufacturing and leasing cost and the labor cost required by dismounting are saved, and the integral connection reliability and the construction convenience are higher.
On the basis of the above embodiment, please refer to fig. 3, the prefabricated combined shear wall further includes an insulating layer 8 disposed between the bearing wall plate 6 and the upper-layer distributed steel bars 2, and the surface of the insulating layer 8 is not in contact with the outer surface of the upper-layer distributed steel bars 2, so that the upper-layer distributed steel bars 2 are completely wrapped in the post-cast concrete.
The type and thickness of the heat preservation layer 8 are determined according to building heat preservation regulations of various regions by referring to the prior art, and the distance from the heat preservation layer 8 to the outer surface of the upper-layer distribution steel bar 2 is determined according to actual construction needs, which is not described again.
In this embodiment, reserve certain distance between heat preservation 8 and upper distribution reinforcing bar 2, be favorable to all wrapping up upper distribution reinforcing bar 2 in post-cast concrete to upper distribution reinforcing bar 2 and post-cast concrete atress in coordination.
Of course, the heat insulating layer 8 may also be disposed between the bearing wall plate 6 and the lower-layer distribution steel bars 3, as shown in fig. 4, and a gap exists between the surface of the heat insulating layer 8 and the outer surface of the lower-layer distribution steel bars 3, so that the lower-layer distribution steel bars 3 are completely wrapped in the post-cast concrete.
In addition to the prefabricated combined shear wall, the invention also provides a construction method for the prefabricated combined shear wall disclosed in the embodiment, which comprises the following steps:
step S1, connecting the upper-layer distributed steel bars 2 and the lower-layer distributed steel bars 3 by using tie bars 4 to form a steel bar cage;
step S2, placing parallel bearing wall plates 6 on two sides of a reinforcement cage, wherein a T-shaped connecting piece 101 is pre-embedded in one of the bearing wall plates 6, and a cap-shaped connecting piece 102 is pre-embedded in the other of the bearing wall plates 6;
step S3, connecting the T-shaped connecting piece 101 and the cap-shaped connecting piece 102 by using the fastening bolt 103 to connect the reinforcement cage and the bearing wall boards 6 on the two sides, and filling slurry into the concave part of the cap-shaped connecting piece 102 to complete the assembly of the prefabricated wall;
and S4, transporting and hoisting the prefabricated wall to a construction position, connecting each layer of prefabricated wall and the edge member 11, and pouring post-cast concrete.
It should be noted that in step S2, the web members of the T-shaped connecting members 101 are bound or welded to the reinforcement cage in order to reduce the displacement of the reinforcement cage during transportation.
Preferably, the web member of the T-shaped connecting member 101 is located at a steel bar intersection of the steel bar cage, and the web member is bound or welded with the steel bar cage. The steel bar junction of the steel bar cage is the connection point of the horizontal steel bars and the vertical steel bars of the upper and lower layers of distributed steel bars, the web member of the T-shaped connecting piece 101 is connected to the connection point, and the steel bar cage can be effectively connected and fixed with the positioning connecting piece.
It should be noted that in step S4, the edge member 11 includes L-shaped edge members, straight edge members, T-shaped edge members, cross edge members, and the like, and the prefabricated wall body and the edge member 11 are connected mainly in two ways:
firstly, the reinforcement cage of the edge member 11 and the reinforcement cage of the prefabricated wall body are integrated and prefabricated and molded together in a factory, as shown in fig. 9, 11 and 12;
secondly, as shown in fig. 7, the longitudinal bars 111 and the stirrups 112 of the edge member 11 are independently bound to form a reinforcement cage, which can be independently prefabricated in a factory or constructed on site; placing the reinforcement cage of the edge member 11 to enable a gap to exist between the reinforcement cage and the prefabricated wall body, so that the fault tolerance rate of the prefabricated wall body during hoisting is improved, and the operation of construction personnel is facilitated; after the hoisting of the prefabricated wall body and the binding of the reinforcing steel bars of the edge member 11 are finished, horizontal connecting reinforcing steel bars 13 are uniformly placed in a reserved gap between the prefabricated wall body and the edge member, and then the formwork 12 is erected and post-pouring concrete is poured.
The type of the poured post-cast concrete can be determined according to the horizontal width of the cavity 7, and when the horizontal width of the cavity 7 is larger than or equal to 200mm, common concrete can be poured; otherwise, self-compacting concrete or fine stone concrete is required to be poured.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The prefabricated combined shear wall and the construction method thereof provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the 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.
CN202210768334.8A 2022-07-01 2022-07-01 Prefabricated combined shear wall and construction method thereof Pending CN115075436A (en)

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Application Number Priority Date Filing Date Title
CN202210768334.8A CN115075436A (en) 2022-07-01 2022-07-01 Prefabricated combined shear wall and construction method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210768334.8A CN115075436A (en) 2022-07-01 2022-07-01 Prefabricated combined shear wall and construction method thereof

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Publication Number Publication Date
CN115075436A true CN115075436A (en) 2022-09-20

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