CN115110669A - Prefabricated assembly type shear wall and construction method thereof - Google Patents

Prefabricated assembly type shear wall and construction method thereof Download PDF

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Publication number
CN115110669A
CN115110669A CN202210768424.7A CN202210768424A CN115110669A CN 115110669 A CN115110669 A CN 115110669A CN 202210768424 A CN202210768424 A CN 202210768424A CN 115110669 A CN115110669 A CN 115110669A
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China
Prior art keywords
template
steel
steel bars
prefabricated
reinforcement cage
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CN202210768424.7A
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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 CN202210768424.7A priority Critical patent/CN115110669A/en
Publication of CN115110669A publication Critical patent/CN115110669A/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
    • 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
    • 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
    • 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
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • 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
    • E04B2002/8682—Mixed technique using permanent and reusable forms

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)

Abstract

The invention relates to the field of assembly type buildings and discloses a prefabricated assembly type shear wall and a construction method thereof, wherein the prefabricated assembly type shear wall comprises upper-layer distributed steel bars, lower-layer distributed steel bars, a template and a plurality of positioning connecting pieces, wherein the upper-layer distributed steel bars and the lower-layer distributed steel bars are connected to form a steel bar cage; the positioning connecting piece comprises a web plate and flange plates vertically connected to two ends of the web plate, the web plate penetrates through the steel reinforcement cage, part of horizontal steel reinforcements of the steel reinforcement cage penetrate through the web plate, the two flange plates are both positioned outside the steel reinforcement cage, and the flange plates are provided with a plurality of threaded holes for mounting fastening bolts; the inner surface of the template is arranged to be tightly attached to the outer surface of the flange plate, and a plurality of fastening bolts penetrate through the through holes of the template to be connected with the flange plate so as to form a cavity for pouring post-cast concrete; the tensile strength of the web plate is greater than the maximum lateral pressure of the post-cast concrete to the template, and the maximum bending deformation of the flange plate is less than 1 mm. Therefore, the connection between the reinforcement cage and the template can be completed in a factory, the construction quality is improved, and the construction process is simplified.

Description

Prefabricated assembly type shear wall and construction method thereof
Technical Field
The invention relates to the technical field of assembly type buildings, in particular to a prefabricated assembly type shear wall. In addition, the invention also relates to a construction method for the prefabricated shear wall.
Background
The existing cast-in-place shear wall structure is complex in construction process and long in construction period, and the problems of steel bar deviation and steel bar binding mistake and omission easily occur when steel bar binding work is carried out on site, so that the binding quality of a steel bar cage is difficult to guarantee. Meanwhile, the steel bars are directly exposed in the external environment, are easily affected by weather factors such as rain, snow and the like, and are easy to slow down the construction progress.
In summary, how to improve the construction quality of the shear wall structure and simplify the construction process of the shear wall structure is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of this, the present invention provides a prefabricated shear wall, which can be prefabricated in a factory to complete the binding of a reinforcement cage and fix the reinforcement cage and templates on two sides, thereby improving the construction quality of the shear wall structure and simplifying the construction process of the shear wall structure.
In addition, the invention also provides another construction method for the prefabricated shear wall.
In order to achieve the above purpose, the invention provides the following technical scheme:
a prefabricated assembly type shear wall comprises upper-layer distributed steel bars, lower-layer distributed steel bars, a template and a plurality of I-shaped positioning connecting pieces, wherein the upper-layer distributed steel bars and the lower-layer distributed steel bars are connected through tie bars and/or truss steel bars to form a steel bar cage;
the positioning connecting piece comprises a web plate and flange plates vertically connected to two ends of the web plate, the web plate penetrates through the steel reinforcement cage, the web plate is provided with horizontal steel reinforcement holes, so that part of horizontal steel reinforcements of the steel reinforcement cage penetrate through the horizontal steel reinforcement holes, the two flange plates are located outside the steel reinforcement cage, and the flange plates are provided with a plurality of threaded holes for mounting fastening bolts;
the inner surface of the template is arranged close to the outer surface of the flange plate, and a plurality of fastening bolts penetrate through holes of the template to be connected with the flange plate so as to tie the templates on two sides of the positioning connecting piece and enclose a cavity for pouring post-cast concrete;
the tensile strength of the web plate is greater than the maximum side pressure of the post-cast concrete to the template, and the maximum bending deformation of the flange plate during the post-cast concrete pouring is less than 1 mm.
Preferably, the two flange plates have the same shape and size, and the central axis of the web plate is collinear with the central axis of the flange plate;
the threaded holes are uniformly distributed along the circumferential direction of the flange plate.
Preferably, the template comprises a wood template, a stainless steel template, an aluminum alloy template, a ribbed plastic template, a PVC skinning foaming plate and a fiber reinforced composite plate, and the inner diameter of the through hole of the template is larger than or equal to the outer diameter of the fastening bolt.
Preferably, when the horizontal width of the cavity is greater than or equal to 200mm, the post-cast concrete is ordinary concrete;
and when the horizontal width of the cavity is less than 200mm, the post-cast concrete is self-compacting concrete or fine aggregate concrete.
Preferably, the template is provided with a pipeline opening and/or a door/window opening for placing an opening mold.
Preferably, the post-cast concrete further comprises a heat insulation layer, wherein the heat insulation layer is arranged between the template and the upper-layer distributed steel bars, and gaps are reserved between the heat insulation layer and the template and between the heat insulation layer and the upper-layer distributed steel bars, so that the upper-layer distributed steel bars and the heat insulation layer can be completely wrapped in the post-cast concrete.
A construction method for a prefabricated 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 a plurality of positioning connecting pieces in the reinforcement cage, wherein flange plates at two ends of each positioning connecting piece extend out of the outer edge of the reinforcement cage and are connected with the positioning connecting pieces and the reinforcement cage;
arranging a template outside the flange plate, and connecting the template and the flange plate by using a fastening bolt to finish the assembly of the prefabricated wall body;
transporting and hoisting the prefabricated wall body to a construction position, connecting the prefabricated wall body with an edge member, and pouring post-cast concrete;
and after the post-cast concrete reaches the preset strength, disassembling the fastening bolt and the template, and filling slurry into the threaded hole of the flange plate.
Preferably, the connecting the positioning connector and the reinforcement cage includes:
the web plate of the positioning connecting piece is provided with a horizontal reinforcing steel bar hole, and part of horizontal reinforcing steel bars of the reinforcing steel bar cage penetrate through the horizontal reinforcing steel bar hole;
and/or the web plate of the positioning connecting piece is connected with the vertical reinforcing steel bars and/or the horizontal reinforcing steel bars of the reinforcing cage in a binding or welding way.
When the prefabricated assembly type shear wall is prefabricated in a factory, the tie bars and/or the truss steel bars are used for connecting the upper-layer distributed steel bars and the lower-layer distributed steel bars to form a steel bar cage; arranging a plurality of positioning connecting pieces penetrating through the reinforcement cage in the reinforcement cage, enabling flange plates at two ends of each positioning connecting piece to extend out of the reinforcement cage and connecting a web plate of each positioning connecting piece with the reinforcement cage; and arranging a template on the outer end surface of the flange plate, and connecting the template and the positioning connecting piece by using a fastening bolt to complete the connection of the prefabricated wall plate.
After the prefabricated wallboard is transported and hoisted to a construction position, post-cast concrete is poured in a cavity between the templates on the two sides; and after the post-cast concrete reaches the preset strength, disassembling the fastening bolts and the templates at two sides, and filling the slurry into the threaded holes on the flange plates.
Therefore, in the prefabricated shear wall provided by the invention, the binding of the reinforcement cage is prefabricated in a factory, so that the binding quality of the reinforcement cage is ensured, the construction process of binding the reinforcement cage on site is saved, and the construction process of the shear wall structure is greatly simplified; and the web plate of the positioning connecting piece is provided with a horizontal reinforcing steel bar hole for the horizontal reinforcing steel bar of the reinforcing cage to pass through, and the reinforcing cage is connected with the positioning connecting piece of the formworks at the two sides of the drawknot, so that the deviation of the reinforcing cage in the transportation and hoisting process is avoided.
Meanwhile, the steel reinforcement cage and the templates on the two sides are tied by the positioning connecting piece, so that the quality of the prefabricated wall body is favorably reduced, the prefabricated wall body is convenient to hoist and transport, the on-site formwork erecting process is omitted, and the construction process of the shear wall structure is further simplified.
In addition, the invention also provides a construction method for the prefabricated assembly type 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 first embodiment of a prefabricated shear wall according to the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of a prefabricated shear wall according to the present invention;
FIG. 3 is a schematic structural diagram of a third embodiment of a prefabricated shear wall according to the present invention;
FIG. 4 is a schematic structural diagram of a fourth embodiment of a prefabricated shear wall according to the present invention;
FIG. 5 is a schematic structural view of a fifth embodiment of a prefabricated shear wall according to the present invention;
FIG. 6 is a schematic view of the arrangement of tie bars and positioning connectors in the prefabricated shear wall according to the present invention;
FIG. 7 is a schematic view of the positioning connection;
FIG. 8 is a schematic view of the assembly of the prefabricated wall body and the L-shaped edge member of the prefabricated shear wall according to the present invention;
FIG. 9 is a schematic front view of the reinforcement cage of the L-shaped edge member of FIG. 8;
FIG. 10 is a schematic view of the prefabricated wall body and L-shaped edge members of the prefabricated assembly type shear wall according to the present invention being connected in another assembly manner;
FIG. 11 is a schematic view of the assembly of a prefabricated wall body and a linear edge member of the prefabricated shear wall according to the present invention;
FIG. 12 is an assembly schematic view of a prefabricated wall body and a T-shaped edge 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.
In fig. 1-13:
11 is the positioning connection spare, 12 is fastening bolt, 13 is the backing plate, 2 is upper distribution reinforcing bar, 3 is lower floor's distribution reinforcing bar, 4 is the drawknot muscle, 5 is the truss reinforcing bar, 6 is the template, 7 is the cavity, 8 is the heat preservation, 9 is rust-resistant gasket, 10 is the edge member, 101 is vertical muscle, 102 is the stirrup, 103 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 shear wall, which can be prefabricated in a factory to finish the binding of a reinforcement cage and fix the reinforcement cage and templates at two sides, thereby improving the construction quality of the shear wall structure and simplifying the construction process of the shear wall structure.
In addition, the invention also provides another construction method for the prefabricated shear wall.
Please refer to fig. 1-13.
The prefabricated assembly type shear wall comprises upper-layer distributed steel bars 2, lower-layer distributed steel bars 3, a template 6 and a plurality of I-shaped positioning connecting pieces 11, wherein the upper-layer distributed steel bars 2 and the lower-layer distributed steel bars 3 are connected through tie bars 4 and/or truss steel bars 5 to form a steel bar cage;
the positioning connecting piece 11 comprises a web plate and flange plates vertically connected to two ends of the web plate, the web plate penetrates through the steel reinforcement cage, the web plate is provided with horizontal steel reinforcement holes, so that part of horizontal steel reinforcements of the steel reinforcement cage penetrate through the horizontal steel reinforcement holes, the two flange plates are both positioned outside the steel reinforcement cage, and the flange plates are provided with a plurality of threaded holes for mounting the fastening bolts 12;
the inner surface of the template 6 is tightly attached to the outer surface of the flange plate, and a plurality of fastening bolts 12 penetrate through holes of the template 6 to be connected with the flange plate, so that the templates 6 on two sides of the positioning connecting piece 11 are pulled and tied to form a cavity 7 for pouring post-cast concrete;
the tensile strength of the web plate is greater than the maximum lateral pressure of the post-cast concrete to the template 6, and the maximum bending deformation of the flange plate during the post-cast concrete pouring is less than 1 mm.
Referring to fig. 7, the positioning connecting member 11 includes a web and flange plates perpendicular to two sides of the web, so that the positioning connecting member 11 is i-shaped; the flange plate is provided with a plurality of threaded holes for mounting the fastening bolts 12, so that the flange plate and the fastening bolts 12 are matched to press the template 6 between the flange plate and the bolt heads of the fastening bolts 12.
When the cast-in-place concrete is cast in place, the impact force of the post-cast concrete on the template 6 can be transmitted to the fastening bolts 12 through the template 6 and transmitted to the web plate through the flange plates in threaded connection with the fastening bolts 12, in the process, the flange plates bear great bending moment and shearing force, and the web plate bears great pulling force.
Therefore, the flange plate needs to have enough bending resistance bearing capacity, shearing resistance bearing capacity and bending rigidity, and the bending deformation of the flange plate is smaller than 1mm under the impact force of the post-cast concrete; the tensile strength of the web should be greater than the maximum lateral pressure of the post-cast concrete against the form 6.
The flange plate is limited by the thickness of the flange plate, the length of the threaded hole in the flange plate is short, and in order to ensure the connection strength and the force transmission relationship between the flange plate and the fastening bolt 12, 2-4 threaded holes are usually formed in the flange plate.
The geometrical shapes of the flange plate and the web plate are not limited, the flange plate can be in the shapes of a circle, a rectangle, a triangle and the like, and the web plate can be in the shape of a rectangular plate, so that the positioning connecting piece 11 can be directly manufactured by cutting I-steel, the production is convenient, the cost is low, the performance is reliable, and the positioning connecting piece can be in rod-shaped structures such as a prism, a cylinder, a round table and the like; the sizes of the flange plates on the two sides can be the same or different.
In order to ensure that the stress of the flange plates and the web plates in all directions is relatively uniform and the production of the positioning connecting piece 11 is convenient, preferably, the two flange plates can be set to be identical in shape and size, and the central axis of the web plate is collinear with the central axis of the flange plates; the threaded holes are evenly distributed along the circumferential direction of the flange plate.
Considering that individual parts of the positioning connecting piece 11 are directly exposed outside the post-cast concrete, in order to reduce corrosion and prolong the service life of the positioning connecting piece, the positioning connecting piece 11 is mostly made of high-strength corrosion-resistant materials such as stainless steel, titanium alloy, high-strength plastic, hastelloy and the like.
Certainly, also can set up locating connection spare 11 as ordinary steel to set up rust-resistant gasket 9 at the outer terminal surface of locating connection spare 11's flange board, rust-resistant gasket 9's thickness is mostly 5-40mm, by inorganic non-metallic material preparation such as cement mortar, fibre composite, have good corrosion resistance.
The web of positioning connection piece 11 link up the width direction setting of steel reinforcement cage, and stretch out the outer flange plate of steel reinforcement cage and 6 internal surface butts of template, for the concrete protection layer thickness of guaranteeing upper and lower floor's distribution reinforcement, should the length that the steel reinforcement cage was stretched out to the rational design flange plate.
When the length of the positioning connecting piece 11 is insufficient, the thickness of the concrete protective layer of the steel reinforcement cage can be increased by increasing the thickness of the antirust gasket 9.
The positioning connecting piece 11 can be formed by cutting and processing I-steel, can also be formed by welding a web plate and flange plates at two ends, and can also be integrally produced in batch by casting, turning and other modes, wherein the thickness of the flange plate is 3-20 mm. The specific production mode of the positioning connector 11 is determined according to the material and shape of the positioning connector 11, and the details are not repeated herein.
The fastening bolts 12 are usually hexagon bolts, and are used for crimping the formwork 6 to the outer end face of the flange plate of the positioning connecting piece 11, and blocking the through holes of the formwork 6 so as to prevent the post-cast concrete from overflowing from the through holes of the formwork 6.
When the size of the bolt head of the fastening bolt 12 is smaller than the size of the through hole of the template 6, a backing plate 13 may be provided between the fastening bolt 12 and the template 6, the size of the backing plate 13 is larger than the size of the through hole of the template 6, and the backing plate 13 is provided with the through hole for installing the fastening bolt 12.
The backing plate 13 is generally made of any material with certain bending strength such as steel, plastic and alloy, and the backing plate 13 can be set to be any geometric shape such as round, rectangular and the like; in order to save materials, the through hole of the backing plate 13 is mostly arranged in the center of the backing plate 13.
The specific types, materials, shapes and sizes of the positioning connecting piece 11, the fastening bolt 12 and the backing plate 13 are determined according to the design strength requirement of actual construction, and are not described in detail herein.
The upper-layer distributed steel bars 2 and the lower-layer distributed steel bars 3 are connected through tie bars 4 and/or truss steel bars 5 to form a steel bar framework of the combined assembly type shear wall; upper strata distribution reinforcing bar 2 and lower floor's distribution reinforcing bar 3 all can set up to the reinforcing bar net of constituteing by many horizontal reinforcing bars and many vertical reinforcing bars, as shown in fig. 6, also can set up to fashioned reinforcing bar net piece, and the concrete material, the kind and the size of upper and lower distribution reinforcing bar are confirmed according to the design strength requirement of actual construction, no longer describe herein.
Preferably, referring to fig. 1, the upper distributed steel bars 2 and the lower distributed steel bars 3 are bound or welded with tie bars 4, and the tie bars 4 are uniformly arranged in a plum blossom shape at the steel bar intersection of the steel bar cage. The reinforcing bar meeting point is the tie point of horizontal reinforcement and vertical reinforcement in the steel reinforcement cage, sets up drawknot muscle 4 in here, is favorable to strengthening drawknot muscle 4 and upper and lower floor's distribution reinforcement's connection stability.
The truss reinforcement 5 may be used to partially or completely replace the tie bars 4, as shown in fig. 2 and 5, the truss reinforcement 5 includes at least one upper layer reinforcement and at least two lower layer reinforcements; the upper layer steel bars and the lower layer steel bars 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 bar is bound with the upper distributed reinforcing bar 2 or welded connection, and the lower reinforcing bar is bound with the lower distributed reinforcing bar 3 or welded connection.
In order to effectively tie the upper-layer distributed steel bars 2 and the lower-layer distributed steel bars 3, preferably, the tie bars 4 and/or the truss steel bars 5 can be uniformly arranged along the length direction of the prefabricated shear wall. Preferably, the distance between two adjacent tie bars 4 can be set to 200 and 800 mm.
In order to prevent the reinforcement cage from shifting in the transportation and hoisting processes, the web plate of the positioning connecting piece 11 is connected with the reinforcement cage. Preferably, can set up the web of positioning connection piece 11 and be located steel reinforcement intersection point department of steel reinforcement cage, positioning connection piece 11 and steel reinforcement cage ligature or welded connection, positioning connection piece 11's web can be simultaneously with the horizontal reinforcement and the vertical reinforcement of steel reinforcement cage be connected, compare in only with horizontal reinforcement be connected or only with vertical reinforcement be connected, connection stability and reliability are stronger.
The inner surface of the template 6 is closely attached to the outer surface of the upper flange plate of the positioning connecting piece 11 and used for enclosing a cavity 7 for pouring post-cast concrete.
Preferably, the template 6 comprises a wooden template, a stainless steel template, a plastic template, an aluminum alloy template, a PVC skinning foaming plate, a ribbed plastic template and a fiber reinforced composite plate, and the inner diameter of the through hole of the template 6 is greater than or equal to the outer diameter of the fastening bolt 12. To facilitate the removal of the fastening bolts 12, the through-holes of the template 6 are usually provided slightly larger than the outer diameter of the fastening bolts 12.
The concrete type of the template 6 is determined according to actual construction needs by referring to the prior art; the thickness of the template 6 is determined according to the material of the template 6, the thickness of the template 6 having relatively high strength is low, and the thickness of the template 6 having relatively low strength is high.
Besides the through holes for installing the fastening bolts 12, pipeline openings and/or door and window openings for placing opening molds are reserved on the template 6 for the requirement of laying pipelines or opening doors and windows in the prefabricated assembly type shear wall.
Taking laying a pipeline as an example, a pipeline needs to be reserved in a reinforcement cage according to a design position, a plurality of positioning connecting pieces 11 are inserted into a non-pipeline area of the reinforcement cage, a template 6 provided with a hole die is arranged outside a flange plate of each positioning connecting piece 11, the hole die and the pipeline are aligned and connected, and the template 6 and the flange plate of each positioning connecting piece 11 are connected by fastening bolts 12 to complete the assembly of the prefabricated wall body; after the prefabricated wall body is transported and hoisted in place, post-cast concrete is poured in the cavity 7, and after the post-cast concrete reaches the preset strength, the opening die and the die plate 6 are detached for subsequent reuse.
The type and thickness of post-cast concrete affect the strength of the prefabricated shear wall, and in consideration of the design strength and construction cost of the wall, ordinary concrete is usually cast when the horizontal width of the cavity 7 is greater than or equal to 200mm, and self-compacting concrete or fine aggregate concrete is cast when the horizontal width of the cavity 7 is less than 200 mm.
When prefabricating in a factory, connecting the upper-layer distributed steel bars 2 and the lower-layer distributed steel bars 3 by using tie bars 4 and/or truss steel bars 5 to form a steel bar cage; arranging a plurality of positioning connecting pieces 11 penetrating through the reinforcement cage in the reinforcement cage, enabling flange plates at two ends of each positioning connecting piece 11 to extend out of the reinforcement cage and connecting a web plate of each positioning connecting piece 11 with the reinforcement cage; and arranging a template 6 on the outer end surface of the flange plate, and connecting the template 6 and the flange plate of the positioning connecting piece 11 by using a fastening bolt 12 to complete the connection of the prefabricated wall board.
After the prefabricated wallboard is transported and hoisted to a construction position, post-cast concrete is poured in the cavity 7 between the templates 6 at the two sides; and after the post-cast concrete reaches the preset strength, disassembling the fastening bolts 12 and the templates 6 at two sides, and filling the slurry into the threaded holes on the flange plates.
It should be noted that, referring to fig. 8, 10-12, the edge member 10 includes various types such as a straight edge member, an L-shaped edge member, a T-shaped edge member, etc., and the reinforcement cage of the edge member 10 can be formed by connecting longitudinal bars 101, stirrups 102 (and tie bars 4) by binding, mechanical connection, grouting, welding, etc. The manner of attachment of the edge member 10 to the prefabricated wall is influenced by the type of edge member 10 and the manner of lashing of the reinforcement cages of the edge member 10.
For example, when the reinforcement cages of the edge members 10 are connected in a binding manner, the reinforcement cages of the edge members 10, the formworks 6 of the edge members 10 and the prefabricated wall body can be arranged to be an integral structure, and the edge members 10 and the prefabricated wall body are prefabricated, formed, transported and hoisted together, as shown in fig. 10-12;
when the edge member 10 is a non-linear edge member or the reinforcement cage of the edge member 10 is in non-binding connection, the reinforcement cage of the edge member 10 can be independently prefabricated and molded in a factory or manufactured on site because the edge member 10 cannot be prefabricated and transported together with a prefabricated wall body at the time; after the fabrication of the reinforcement cage of the edge member 10 and the hoisting of the prefabricated wall are completed, a plurality of horizontal connecting reinforcements 103 are uniformly arranged between the two, as shown in fig. 8.
Preferably, after the fabrication of the steel reinforcement cage of the edge member 10 and the hoisting of the prefabricated wall are completed, a gap exists between the steel reinforcement cage of the edge member 10 and the connecting end of the prefabricated wall, so that the connecting end of the prefabricated wall collides with the steel reinforcement cage of the edge member 10 during hoisting, the fine adjustment of the position of the prefabricated wall is facilitated, and the hoisting fault tolerance rate is improved.
Similarly, when the prefabricated wall body is two-layer or even multilayer, can set up connection shaped steel or steel sheet in the cavity 7 of two-layer prefabricated wall body about adjacent, the surface of connection shaped steel and the surface of steel sheet all are equipped with a plurality of peg to strengthen the anti shearing bearing capacity at interface, simplify the work progress.
In order to ensure the pouring quality of the post-cast concrete, when the number of layers of the prefabricated wall body is large, the cavity 7 of the prefabricated wall body needs to be poured layer by layer. Preferably, high-strength ductile concrete with good fluidity can be poured in the prefabricated wall body at the bottommost layer so as to enhance the overall compression resistance, bending resistance and shear resistance bearing capacity.
In the embodiment, the binding of the reinforcement cage is prefabricated in a factory, so that the binding quality of the reinforcement cage is ensured, the construction process of binding the reinforcement cage on site is saved, and the construction process of the shear wall structure is greatly simplified; and the web plate of the positioning connecting piece 11 is provided with a horizontal reinforcing steel bar hole through which the horizontal reinforcing steel bar of the reinforcing steel bar cage passes, and the reinforcing steel bar cage is connected with the positioning connecting piece 11 of the formworks 6 at the two sides of the drawknot, so that the deviation of the reinforcing steel bar cage in the transportation and hoisting process is avoided.
Meanwhile, the steel reinforcement cage and the templates 6 on the two sides are tied by the positioning connecting piece 11, so that the quality of the prefabricated wall body is favorably reduced, the prefabricated wall body is convenient to hoist and transport, the on-site formwork erecting process is omitted, and the construction process of the shear wall structure is further simplified.
On the basis of above-mentioned embodiment, prefabricated assembled shear force wall still includes heat preservation 8, and heat preservation 8 sets up between 6 and upper distribution reinforcing bar 2 of template, all has the clearance between 8 and 6, the upper distribution reinforcing bar 2 of heat preservation, so that upper distribution reinforcing bar 2 and heat preservation 8 all can wrap up in post-cast concrete completely.
The concrete kind and the thickness of heat preservation 8 refer to prior art according to the building heat preservation regulation in each district and confirm, and the distance of heat preservation 8 to the internal surface of template 6, the distance of heat preservation 8 to the surface of upper distribution reinforcing bar 2 then confirm according to the steel reinforcement cage concrete protection layer design thickness etc. of actual construction, and no longer repeated here.
In this embodiment, there is the clearance between heat preservation 8 and template 6, the upper strata distribution reinforcing bar 2, is favorable to all wrapping up upper strata distribution reinforcing bar 2 and heat preservation 8 in post-cast concrete, has strengthened upper strata distribution reinforcing bar 2 and post-cast concrete's atress in coordination on the one hand, and on the other hand heat preservation 8 is provided with post-cast concrete layer outward, and post-cast concrete layer can play anticorrosive fire prevention function to heat preservation 8.
In addition to the prefabricated shear wall, the invention also provides a construction method of the prefabricated shear wall disclosed by the embodiment, and the construction method 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 a plurality of positioning connectors 11 in the reinforcement cage, wherein flange plates at two ends of each positioning connector 11 extend out of the outer edge of the reinforcement cage and are connected with the positioning connectors 11 and the reinforcement cage;
step S3, arranging a template 6 outside the flange plate, and connecting the template 6 and the flange plate by using a fastening bolt 12 to finish the assembly of the prefabricated wall body;
step S4, transporting and hoisting the prefabricated wall to a construction position, connecting the prefabricated wall and the edge member 10, and pouring post-cast concrete;
and step S5, after the post-cast concrete reaches the preset strength, detaching the fastening bolts 12 and the template 6, and filling the screw holes of the flange plates with grout.
It should be noted that, considering that the flange plate of the positioning connector 11 extends out of the reinforcement cage, in order to facilitate the connection between the positioning connector 11 and the reinforcement cage, the web plate of the positioning connector 11 is usually connected to the horizontal reinforcements or the vertical reinforcements of the upper and lower layers of distributed reinforcements.
Preferably, the connecting positioning connector 11 and the reinforcement cage comprise:
the web plate of the positioning connecting piece 11 is provided with a horizontal reinforcing steel bar hole, and part of horizontal reinforcing steel bars of the reinforcing cage penetrate through the horizontal reinforcing steel bar hole;
and/or the web of the positioning connecting piece 11 is connected with the vertical steel bars and/or the horizontal steel bars of the steel reinforcement cage in a binding or welding way.
The connection method of the horizontal steel bars of the steel bar cage penetrating through the horizontal steel bar holes of the web plate is simple and convenient to connect and convenient to construct, ensures stable connection of the steel bar cage and the positioning connecting piece 11, and effectively avoids deviation of the steel bar cage in the processes of transportation, hoisting and the like.
Preferably, the web plate of the positioning connecting piece 11 may be located at the intersection of the steel bars of the steel bar cage, and the positioning connecting piece 11 is bound or welded with the steel bar cage.
The steel bar junction is the tie point of horizontal reinforcement and vertical reinforcement in the steel reinforcement cage, sets up positioning connection spare 11 in here, can be connected the web with horizontal reinforcement and vertical reinforcement simultaneously, and connection stability and reliability all are better than only being connected with single horizontal reinforcement or vertical reinforcement.
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 assembly type shear wall and the construction method thereof provided by the invention are described in detail above. The principles and embodiments of the present invention have been described herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. 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 (8)

1. A prefabricated assembly type shear wall is characterized by comprising upper-layer distributed steel bars, lower-layer distributed steel bars, a template and a plurality of I-shaped positioning connecting pieces, wherein the upper-layer distributed steel bars and the lower-layer distributed steel bars are connected through tie bars and/or truss steel bars to form a steel bar cage;
the positioning connecting piece comprises a web plate and flange plates vertically connected to two ends of the web plate, the web plate penetrates through the steel reinforcement cage, the web plate is provided with horizontal steel reinforcement holes, so that part of horizontal steel reinforcements of the steel reinforcement cage penetrate through the horizontal steel reinforcement holes, the two flange plates are located outside the steel reinforcement cage, and the flange plates are provided with a plurality of threaded holes for mounting fastening bolts;
the inner surface of the template is arranged close to the outer surface of the flange plate, and a plurality of fastening bolts penetrate through holes of the template to be connected with the flange plate so as to tie the templates on two sides of the positioning connecting piece and enclose a cavity for pouring post-cast concrete;
the tensile strength of the web plate is greater than the maximum side pressure of the post-cast concrete to the template, and the maximum bending deformation of the flange plate during the post-cast concrete pouring is less than 1 mm.
2. The prefabricated shear wall of claim 1, wherein the two flange plates are identical in shape and size, and the central axis of the web is collinear with the central axis of the flange plates;
the threaded holes are uniformly distributed along the circumferential direction of the flange plate.
3. The prefabricated assembly type shear wall of claim 1, wherein the templates comprise wood templates, stainless steel templates, aluminum alloy templates, PVC skinning foaming plates, ribbed plastic templates and fiber reinforced composite plates, and the inner diameter of the through hole of each template is greater than or equal to the outer diameter of the fastening bolt.
4. The prefabricated shear wall of any one of claims 1 to 3,
when the horizontal width of the cavity is larger than or equal to 200mm, the post-cast concrete is ordinary concrete;
and when the horizontal width of the cavity is less than 200mm, the post-cast concrete is self-compacting concrete or fine aggregate concrete.
5. The prefabricated shear wall of any one of claims 1 to 3, wherein the formwork is provided with pipe openings and/or door and window openings for placing opening molds.
6. The prefabricated shear wall of any one of claims 1 to 3, further comprising an insulating layer, wherein the insulating layer is arranged between the formwork and the upper distribution steel bars, and gaps are formed between the insulating layer and the formwork and between the insulating layer and the upper distribution steel bars, so that the upper distribution steel bars and the insulating layer can be completely wrapped in the post-cast concrete.
7. A construction method for the prefabricated shear wall of any one of claims 1 to 6, comprising:
connecting upper-layer distributed steel bars and lower-layer distributed steel bars by using tie bars to form a steel bar cage;
placing a plurality of positioning connecting pieces in the reinforcement cage, wherein flange plates at two ends of each positioning connecting piece extend out of the outer edge of the reinforcement cage and are connected with the positioning connecting pieces and the reinforcement cage;
arranging a template outside the flange plate, and connecting the template and the flange plate by using a fastening bolt to finish the assembly of the prefabricated wall body;
transporting and hoisting the prefabricated wall body to a construction position, connecting the prefabricated wall body with an edge member, and pouring post-cast concrete;
and after the post-cast concrete reaches the preset strength, disassembling the fastening bolt and the template, and filling slurry into the threaded hole of the flange plate.
8. The construction method of claim 7, wherein the connecting the retaining connector and the reinforcement cage comprises:
the web plate of the positioning connecting piece is provided with a horizontal reinforcing steel bar hole, and part of horizontal reinforcing steel bars of the reinforcing steel bar cage penetrate through the horizontal reinforcing steel bar hole;
and/or the web plate of the positioning connecting piece is connected with the vertical reinforcing steel bars of the reinforcing cage and/or the horizontal reinforcing steel bars in a binding or welding way.
CN202210768424.7A 2022-07-01 2022-07-01 Prefabricated assembly type shear wall and construction method thereof Pending CN115110669A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115726496A (en) * 2022-11-15 2023-03-03 海南大学 Anti-seismic superposed shear wall structure and construction method thereof
CN116497980A (en) * 2023-05-16 2023-07-28 海南大学 Edge member, prefabricated pull-tab type connecting piece anti-seismic superposed wall and construction method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115726496A (en) * 2022-11-15 2023-03-03 海南大学 Anti-seismic superposed shear wall structure and construction method thereof
CN115726496B (en) * 2022-11-15 2023-08-11 海南大学 Anti-seismic superimposed shear wall structure and construction method thereof
CN116497980A (en) * 2023-05-16 2023-07-28 海南大学 Edge member, prefabricated pull-tab type connecting piece anti-seismic superposed wall and construction method
CN116497980B (en) * 2023-05-16 2023-11-14 海南大学 Edge member, prefabricated pull-tab type connecting piece anti-seismic superposed wall and construction method

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