CN115110671A - Combined assembly type shear wall and construction method thereof - Google Patents

Combined assembly type shear wall and construction method thereof Download PDF

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Publication number
CN115110671A
CN115110671A CN202210768427.0A CN202210768427A CN115110671A CN 115110671 A CN115110671 A CN 115110671A CN 202210768427 A CN202210768427 A CN 202210768427A CN 115110671 A CN115110671 A CN 115110671A
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China
Prior art keywords
bearing wall
post
wall
bearing
steel bars
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CN202210768427.0A
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Chinese (zh)
Inventor
陈云
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Hainan University
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Hainan University
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Priority to CN202210768427.0A priority Critical patent/CN115110671A/en
Publication of CN115110671A publication Critical patent/CN115110671A/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
    • 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
    • E04B2/8647—Walls made by casting, pouring, or tamping in situ made in permanent forms with ties going through the 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
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • 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
    • E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
    • E04G17/075—Tying means, the tensional elements of which are fastened or tensioned by other means
    • 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 technical field of assembly type buildings, and discloses a combined assembly type shear wall and a construction method thereof, wherein the combined assembly type shear wall comprises upper-layer distributed steel bars, lower-layer distributed steel bars, two bearing wall plates and a plurality of positioning connecting pieces, wherein 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 positioning connecting piece comprises a web member penetrating through the steel reinforcement cage and flange plates which are vertically connected to two ends of the web member and are positioned outside the steel reinforcement cage, and the force bearing wall plates are arranged outside the flange plates in parallel to enclose a cavity for pouring concrete after pouring; the flange plate is provided with a through hole, both ends of the web member are provided with threaded holes for mounting fastening bolts, the threaded holes and the web member are not communicated, and the fastening bolts penetrate through the through holes of the bearing wall plate and then are connected with the positioning connecting pieces; the bearing wall board is provided with a plurality of anchoring bolts, and the shearing resistance bearing capacity of the bearing wall board is larger than or equal to that of post-cast concrete with equal thickness. Therefore, the bearing wall plate can bear the force together with the post-cast concrete and the reinforcement cage, and the utilization rate of the wall body is improved.

Description

Combined 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 combined assembly type shear wall. In addition, the invention also relates to a construction method for the combined assembly type shear wall.
Background
The fabricated building is a concrete structure building designed and built in a field assembly mode by mainly using reinforced concrete prefabricated components produced in factories.
At present, in common fabricated concrete shear wall structures, such as double-sided laminated concrete shear wall structures, the thickness of prefabricated wall plates on two sides of the laminated concrete shear wall structures is regulated by technical specifications to be not smaller than 50mm, so that the hoisting quality is large, a heavy tower crane is required for hoisting, and the hoisting cost and the transportation cost are high; although the thickness of the single-side prefabricated wall plate of the partially-assembled shear wall is 20mm, the single-side prefabricated wall plate is only used as a template and does not participate in stress, so that the structural cost is greatly increased, the building using area is occupied, and the utilization rate of the wall body is low.
In summary, how to reduce the comprehensive cost of the fabricated shear wall structure and improve the use efficiency of the wall body is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a combined assembly type shear wall, in which the bearing wall boards on both sides can deform and bear force together with the post-cast concrete and the reinforcement cage, so that the utilization rate of the wall is greatly improved, and the comprehensive cost is low.
In addition, the invention also provides a construction method for the combined assembly type shear wall. In order to achieve the above purpose, the invention provides the following technical scheme:
a combined assembly type shear wall comprises upper-layer distributed steel bars, lower-layer distributed steel bars, two force bearing wall plates 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 to form a steel bar cage;
the positioning connecting piece comprises a web member penetrating through the reinforcement cage and flange plates vertically connected to two ends of the web member, the flange plates extend out of the reinforcement cage, and the two bearing wall plates are arranged on the outer edges of the flange plates in parallel so as to enclose a cavity for casting concrete after cast-in-place; through holes are formed in the two flange plates, threaded holes for mounting fastening bolts are formed in the two ends of the web member, the two threaded holes are not communicated, and the fastening bolts penetrate through the through holes of the bearing wall plates and then are connected with the positioning connecting pieces;
the inner surface of the bearing wall board is provided with a plurality of anchor bolts, the height h of the anchor bolts protruding out of the inner surface of the bearing wall board is more than or equal to 20mm, the shear-resistant bearing capacity of the bearing wall board is more than or equal to that of post-cast concrete with equal thickness, and the tensile strength of the web members is more than the maximum side pressure of the post-cast concrete to the bearing wall board.
Preferably, the fastening bolt with be equipped with the backing plate between the strength bearing wallboard, the size of backing plate is greater than the size of the through-hole of strength bearing wallboard.
Preferably, the flange plates are provided with through holes or threaded holes, and the web members with the threaded holes at both ends are vertically welded between the two flange plates.
Preferably, external threads are arranged at two ends of the web member, the flange plate is provided with an internal thread hole matched with the external threads, and the thickness of the flange plate is 3-20 mm.
Preferably, the bearing wall board comprises a high-strength cement fiber board, a steel wire mesh cement fiber board and a high-strength fine stone fiber board, and the thickness of the bearing wall board is larger than or equal to 15 mm.
Preferably, the web member is located at a reinforcement intersection of the reinforcement cage, and the web member is bound or welded to the reinforcement cage.
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 a gap exists between the heat insulation layer and 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 composite fabricated shear wall of any one of the above, 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, so that flange plates at two ends of each positioning connecting piece extend out of the outer edge of the reinforcement cage;
placing a bearing wall plate outside the flange plate and fixing a fastening bolt, so that the fastening bolt penetrates through the bearing wall plate to be connected with the positioning connecting piece, and assembling 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 filling slurry into the threaded hole of the positioning connecting piece.
Preferably, the inner surface of the bearing wall board is provided with galling and/or concave-convex grooves so as to enhance the bonding of the bearing wall board and the post-cast concrete.
In the combined assembly type shear wall provided by the invention, the cavity is formed between the bearing wall boards at the two sides, the shear bearing capacity of the bearing wall boards is greater than that of post-cast concrete with equal thickness, and the bearing wall boards can be coordinated with the post-cast concrete and a reinforcement cage to deform and bear force together.
Meanwhile, the inner surface of the bearing wall plate is provided with a plurality of anchoring bolts, so that the bearing wall plate and the post-cast concrete are effectively occluded, and the connection between the bearing wall plate and the post-cast concrete is more reliable. In addition, the invention also provides a construction method for the combined 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 fabricated shear wall according to the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of a fabricated shear wall according to the present invention;
FIG. 3 is a schematic structural diagram of a third embodiment of a fabricated shear wall according to the present invention;
FIG. 4 is a schematic structural diagram of a fourth embodiment of a fabricated shear wall according to the present invention;
FIG. 5 is a schematic structural diagram of a fifth embodiment of a fabricated shear wall according to the present invention;
FIG. 6 is a schematic view of the arrangement of tie bars and positioning connectors in the assembled shear wall according to the present invention;
FIG. 7 is a cross-sectional 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 assembled 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 the L-shaped edge member of the assembled shear wall according to the present invention being connected in another assembly manner;
FIG. 11 is a schematic view of the prefabricated wall body and the linear edge member of the assembled shear wall according to the present invention;
FIG. 12 is a schematic view of the prefabricated wall body and T-shaped edge members of the assembled 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 a positioning connecting piece, 12 is a fastening bolt, 13 is a backing plate, 2 is upper-layer distributed reinforcing steel bars, 3 is lower-layer distributed reinforcing steel bars, 4 is a tie bar, 5 is truss reinforcing steel bars, 6 is a bearing wall plate, 61 is an anchor, 7 is a cavity, 8 is a heat-insulating layer, 9 is a template, 10 is an edge member, 101 is a longitudinal bar, 102 is a stirrup, and 103 is horizontal connecting reinforcing steel bars.
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 combined assembly type shear wall, wherein the bearing wall boards on the two sides can be deformed and stressed together with post-cast concrete and a reinforcement cage, so that the utilization rate of the wall is greatly improved, and the comprehensive cost is lower.
In addition, the invention also provides a construction method for the combined assembly type shear wall.
Please refer to fig. 1-13.
The invention provides a combined assembly type shear wall which comprises upper-layer distributed steel bars 2, lower-layer distributed steel bars 3, two bearing wall boards 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 to form a steel bar cage; the positioning connecting piece 11 comprises a web member penetrating through the reinforcement cage and flange plates vertically connected to two ends of the web member, the flange plates extend out of the reinforcement cage, and the two bearing wall plates 6 are arranged on the outer edges of the flange plates in parallel so as to enclose a cavity 7 for casting post-cast concrete in situ;
through holes are formed in the two flange plates, threaded holes for mounting fastening bolts are formed in the two ends of the web member, the two threaded holes are not communicated, and the fastening bolts 12 penetrate through the through holes of the bearing wall plates 6 and then are connected with the positioning connecting pieces 11;
the inner surface of the bearing wall plate 6 is provided with a plurality of anchor bolts 61, the height h of the anchor bolts 61 protruding out of the inner surface of the bearing wall plate 6 is more than or equal to 20mm, the shear-resistant bearing capacity of the bearing wall plate 6 is more than or equal to that of post-cast concrete with equal thickness, and the tensile strength of the web member is more than the maximum side pressure of the post-cast concrete to the bearing wall plate 6.
Referring to fig. 7, the positioning connecting member 11 includes a web member and flange plates perpendicular to two sides of the web member, so that the positioning connecting member 11 is i-shaped; threaded holes for mounting the fastening bolts 12 are formed in the two ends of the web member, and the threaded holes in the two sides are not communicated, so that the tensile strength of the web member is ensured; the flange plate is provided with a through hole for the fastening bolt 12 to pass through, and the through hole can be specifically set as a unthreaded hole or a threaded hole. During site construction, the impact force of the post-cast concrete on the bearing wall boards 6 on the two sides can be directly transmitted to the web members of the positioning connecting pieces 11, and the stress on the flange plates is very small, so that in order to prevent the positioning connecting pieces 11 from being broken, the tensile strength of the web members should be greater than the maximum side pressure of the post-cast concrete on the bearing wall boards 6. The geometrical shapes of the flange plates and the web members are not limited, the flange plates can be set to be in the shapes of circles, rectangles, triangles and the like, and the web members can be set to be in the shapes of prisms, cylinders, round tables and the like; in order to ensure that the pressure of the post-cast concrete on each direction of the flange plates and the web members is relatively uniform, the web members can be vertically connected to the centers of the two flange plates, and the threaded holes are formed in the centers of the web members.
Considering that the positioning connecting piece 11 is exposed in 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 made of high-strength corrosion-resistant materials such as stainless steel, titanium alloy, high-strength plastic and hastelloy.
Certainly, the positioning connecting piece 11 can also be made of common steel, the outer end face of the flange plate of the positioning connecting piece 11 is provided with an antirust gasket, the antirust gasket is 5-40mm thick and is made of inorganic non-metal materials such as cement mortar and fiber composite materials, and the antirust gasket has good corrosion resistance. The fastening bolts 12 are often hexagon bolts, and the specific types, materials, shapes and sizes of the positioning connecting piece 11 and the fastening bolts 12 are determined according to the design strength requirement of actual construction, and are not described again here.
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 combined assembly type shear wall; upper strata distribution reinforcing bar 2 and lower floor's distribution reinforcing bar 3 are the reinforcing bar net of compriseing many horizontal reinforcing bars and many vertical reinforcing bars, as shown in fig. 6, also can set up to the reinforcing bar net piece, and its specific material, kind and size are confirmed according to the design strength requirement of actual construction, no longer describe herein.
The web member of positioning connection piece 11 link up the width direction setting of steel reinforcement cage, and stretch out the flange board outside the steel reinforcement cage and the internal surface butt of load wallboard 6, in order to guarantee the concrete protective layer thickness of upper and lower floor's distribution reinforcing bar, should the length that the flange board stretches out the steel reinforcement cage of rational design.
In addition, when the length of the positioning connecting piece 11 is shorter, the thickness of the concrete protective layer of the steel reinforcement cage can be increased by increasing the thickness of the antirust gasket.
Referring to fig. 6, the tie bars 4 are disposed in a plum blossom shape, and the hooks at the upper and lower ends of the tie bars 4 are respectively bound or welded to the upper and lower layers of the distributed steel bars, so as to effectively tie the upper and lower layers of the distributed steel bars. Of course, the truss reinforcement 5 in fig. 2 and 5 may be used instead of the tie bars 4.
The truss steel bars 5 comprise at least one upper layer steel bar bound or welded with the upper layer distributed steel bar 2 and at least two lower layer steel bars bound or welded with the lower layer distributed steel bar 3; 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 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, it is common to provide web members of the spacer links 11 in connection with the reinforcement cage. Preferably, the web member that can set up positioning connection spare 11 is located the reinforcing bar intersection point department of steel reinforcement cage, and web member and steel reinforcement cage ligature or welded connection to the stability that the reinforcing bar and the steel reinforcement cage are connected. The two bearing wall plates 6 are arranged outside the flange plates of the positioning connecting piece 11 in parallel, on one hand, the bearing wall plates can be used as templates in post-cast concrete pouring, and on the other hand, the bearing wall plates 6 can be cooperatively deformed and jointly stressed with a reinforcement cage and the post-cast concrete so as to enhance the integral bearing capacity of the prefabricated combined shear wall. 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 anchor 61 is arranged on the inner surface of the bearing wall plate 6 to enhance 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 bearing wall plate 6 may include 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 bearing wall plate 6 is greater than or equal to 15mm to ensure the shear-resistant bearing capacity performance of the bearing wall plate 6.
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 a through hole for installing the fastening bolt 12, the size of the through hole is larger than the outer diameter of the fastening bolt 12, when the outer diameter of the bolt head of the fastening bolt 12 is smaller than the diameter of the through hole, in order to prevent the later poured concrete from overflowing, preferably, a backing plate 13 is arranged between the fastening bolt 12 and the bearing wall plate 6, and the size of the backing plate 13 is larger than that of the through hole of the bearing wall plate 6.
The backing plate 13 may be made of any material having a certain bending strength, such as steel, plastic, alloy, etc., and the shape thereof is not limited, but is generally set to a regular geometric shape, such as a circle, a rectangle, etc., and a through hole for mounting the fastening bolt 12 is often provided in the center of the backing plate 13.
Besides the through holes for installing the fastening bolts 12, the bearing wall plate 6 can be provided with mold installation holes for placing pipeline opening molds or door and window opening molds, so that pipeline pipelines can be laid or doors and windows can be opened in the prefabricated combined shear wall. The specific positions of the through holes and the die mounting holes are determined according to the design plan of the combined assembly type shear wall, and are not repeated herein.
When in factory prefabrication production, firstly, the tie bars 4 are utilized to connect the upper-layer distributed reinforcing steel bars 2 and the lower-layer distributed reinforcing steel bars 3 to form a reinforcing cage; then, a plurality of positioning connecting pieces 11 are placed in the steel reinforcement cage, so that flange plates at two ends of the positioning connecting pieces 11 extend out of the outer edge of the steel reinforcement cage; and placing the bearing wall plate 6 outside the flange plate and fixing the fastening bolt 12, so that the fastening bolt 12 penetrates through the bearing wall plate 6 to be connected with the positioning connecting piece 11, and the assembly of the prefabricated wall body is completed.
After the prefabricated wall body is transported and hoisted to a construction position, the prefabricated wall body is connected with the edge member 10, and after-cast concrete is cast in situ; and after the post-cast concrete reaches the preset strength, disassembling the fastening bolt 12 and filling and grouting the threaded hole of the positioning connecting piece 11.
In this embodiment, a cavity 7 is formed between the bearing wall boards 6 on both sides, the shear bearing capacity of the bearing wall boards 6 is greater than that of post-cast concrete with equal thickness, the bearing wall boards 6 can be cooperatively deformed and jointly stressed with the post-cast concrete and a reinforcement cage, and compared with the existing double-sided laminated concrete shear wall, the double-sided laminated concrete shear wall has the advantages of low transportation and hoisting cost, low comprehensive cost, high wall utilization rate, light weight, convenience in construction and energy conservation. Meanwhile, the inner surface of the bearing wall plate 6 is provided with a plurality of anchor bolts 61, so that the effective engagement of the bearing wall plate 6 and the post-cast concrete is ensured, and the connection between the bearing wall plate 6 and the post-cast concrete is more reliable.
Preferably, the flange plates of the positioning connecting piece 11 are provided with through holes or threaded holes, and web members with threaded holes at both ends are vertically welded between the two flange plates. It should be noted that the welding process needs to ensure that the two flange plates are parallel to each other.
Preferably, external threads are further provided at both ends of the web member of the positioning connector 11, the flange plate is provided with an internal threaded hole matched with the external threads, and the thickness of the flange plate is 3-20mm, so as to connect the web member and the flange plates at both sides in a threaded connection manner.
In addition, the flange plate and the web member of the positioning connecting piece 11 can be arranged into an integral structure, and are integrally formed through casting and the like, and the threaded holes are finely machined through turning and the like, so that the machining precision is high, and the mass production of the positioning connecting piece 11 is facilitated.
On the basis of the above embodiments, please refer to fig. 4 and 5, 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 a gap exists between the insulating layer 8 and 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, all reserve the clearance between heat preservation 8 and upper distribution reinforcing bar 2, be favorable to all wrapping up upper distribution reinforcing bar 2 in the post-cast concrete to upper distribution reinforcing bar 2 and post-cast concrete atress in coordination.
Referring to fig. 8, 10-12, the edge member 10 includes various types such as an L-shaped edge member, a line-shaped edge member, a T-shaped edge member, and a cross-shaped edge member, and the connection method between the prefabricated wall and the edge member 10 mainly includes two types:
firstly, the reinforcement cage of the edge member 10 and the reinforcement cage of the prefabricated wall body are integrated and prefabricated and molded together in a factory, as shown in fig. 10-12;
secondly, as shown in fig. 8, the longitudinal bars 101 and the stirrups 102 of the edge members 10 are independently bound to form a reinforcement cage, which can be prefabricated separately in a factory or constructed on site; placing the reinforcement cage of the edge member 10 to form a gap 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 10 are finished, horizontal connecting reinforcing steel bars 103 are uniformly placed in a reserved gap between the prefabricated wall body and the edge member, so that the formwork 9 is erected, and post-cast concrete is poured.
Similarly, when connecting each layer of prefabricated wall/edge member 10, connecting section steel with studs on the surface or steel plate 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 of the wall body are enhanced.
In addition to the above-described assembled shear wall, the present invention also provides a construction method for the assembled shear wall disclosed in the above embodiment, the construction method including:
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, and enabling flange plates at two ends of the positioning connectors 11 to extend out of the outer edge of the reinforcement cage;
step S3, placing the bearing wall board 6 outside the flange plate and fixing the fastening bolt 12, so that the fastening bolt 12 penetrates through the bearing wall board 6 to be connected with the positioning connecting piece 11, and the assembly of the prefabricated wall body is completed; 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;
step S5, after the post-cast concrete reaches the predetermined strength, the fastening bolt 12 is detached and the screw hole of the positioning connector 11 is filled with grout.
It should be noted that in step S4, the type of post-cast concrete may be determined according to the horizontal width of the cavity 7, and when the horizontal width of the cavity 7 is greater than or equal to 200mm, ordinary concrete may be cast; otherwise, self-compacting concrete or fine stone concrete is required to be poured.
The embodiments in the present description 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 assembled 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 (9)

1. A combined assembly type shear wall is characterized by comprising upper-layer distributed steel bars, lower-layer distributed steel bars, two bearing wall boards 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 to form a steel bar cage;
the positioning connecting piece comprises a web member penetrating through the reinforcement cage and flange plates vertically connected to two ends of the web member, the flange plates extend out of the reinforcement cage, and the two bearing wall plates are arranged on the outer edges of the flange plates in parallel so as to enclose a cavity for casting concrete after cast-in-place;
through holes are formed in the two flange plates, threaded holes for mounting fastening bolts are formed in the two ends of the web member, the two threaded holes are not communicated, and the fastening bolts penetrate through the through holes of the bearing wall plates and then are connected with the positioning connecting pieces;
the inner surface of the bearing wall board is provided with a plurality of anchor bolts, the height h of the anchor bolts protruding out of the inner surface of the bearing wall board is more than or equal to 20mm, the shear-resistant bearing capacity of the bearing wall board is more than or equal to that of post-cast concrete with equal thickness, and the tensile strength of the web members is more than the maximum side pressure of the post-cast concrete to the bearing wall board.
2. The assembled shear wall of claim 1, wherein a backing plate is disposed between the fastening bolts and the force-bearing wall plate, and the size of the backing plate is larger than that of the through holes of the force-bearing wall plate.
3. The shear wall of claim 1, wherein the flanges are provided with through holes or threaded holes, and the web, which is provided with threaded holes at both ends, is welded vertically between the two flanges.
4. The assembled shear wall of claim 1, wherein the web members have external threads at both ends thereof, the flange plates have internal threaded holes for engaging the external threads, and the thickness of the flange plates is 3-20 mm.
5. The composite fabricated shear wall of any one of claims 1-4, wherein the load-bearing wall panels comprise high-strength cement fiber panels, steel fiber concrete panels, polyethylene fiber concrete panels, polyvinyl alcohol fiber concrete panels, hybrid fiber concrete panels, steel wire mesh cement fiber panels and high-strength fine stone fiber panels, and the thickness of the load-bearing wall panels is greater than or equal to 15 mm.
6. The shear wall of any one of claims 1 to 4, wherein the web members are located at the intersection of the reinforcement cages, and the web members are tied or welded to the reinforcement cages.
7. The assembled shear wall of any one of claims 1 to 4, further comprising an insulating layer disposed between the load-bearing wall panels and the upper distribution reinforcing bars, wherein a gap is formed between the insulating layer and the outer surface of the upper distribution reinforcing bars, so that the upper distribution reinforcing bars are completely wrapped in the post-cast concrete.
8. A construction method for a composite fabricated 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 a plurality of positioning connecting pieces in the reinforcement cage, so that flange plates at two ends of each positioning connecting piece extend out of the outer edge of the reinforcement cage;
placing a bearing wall plate outside the flange plate and fixing a fastening bolt, so that the fastening bolt penetrates through the bearing wall plate to be connected with the positioning connecting piece, and assembling 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 filling the slurry into the threaded hole of the positioning connecting piece.
9. The construction method as claimed in claim 8, wherein the inner surface of the bearing wall board is provided with roughening and/or concave-convex grooves to enhance the bonding between the bearing wall board and the post-cast concrete.
CN202210768427.0A 2022-07-01 2022-07-01 Combined assembly type shear wall and construction method thereof Pending CN115110671A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115928936A (en) * 2022-12-20 2023-04-07 中国建筑设计研究院有限公司 Assembled double-plate shear wall, assembled house and construction method of assembled house

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115928936A (en) * 2022-12-20 2023-04-07 中国建筑设计研究院有限公司 Assembled double-plate shear wall, assembled house and construction method of assembled house

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