CN115095054A - Positioning connecting piece, prefabricated anti-seismic superposed wall and construction method thereof - Google Patents

Positioning connecting piece, prefabricated anti-seismic superposed wall and construction method thereof Download PDF

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Publication number
CN115095054A
CN115095054A CN202210766915.8A CN202210766915A CN115095054A CN 115095054 A CN115095054 A CN 115095054A CN 202210766915 A CN202210766915 A CN 202210766915A CN 115095054 A CN115095054 A CN 115095054A
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China
Prior art keywords
layer
prefabricated
steel bars
flange plate
edge member
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CN202210766915.8A
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Chinese (zh)
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陈云
刘玉博
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Hainan University
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Hainan University
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Priority to CN202210766915.8A priority Critical patent/CN115095054A/en
Publication of CN115095054A publication Critical patent/CN115095054A/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
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
    • 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
    • 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
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • 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
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • 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)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)

Abstract

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

Description

Positioning connecting piece, prefabricated anti-seismic superposed wall and construction method of prefabricated anti-seismic superposed wall
Technical Field
The invention relates to the technical field of assembly type buildings, in particular to a positioning connecting piece. In addition, the invention also relates to a prefabricated earthquake-proof superposed wall comprising the positioning connecting piece and a construction method of the prefabricated earthquake-proof superposed wall.
Background
The assembly type building is a novel building production mode which realizes energy conservation and environmental protection of building products and maximum sustainable development of full-period value, greatly avoids the generation of building wastes, can reduce carbon emission by more than 40% in the full period, and has obvious energy conservation and emission reduction advantages.
The existing assembly type building comprises an assembly type frame structure and an assembly type shear wall structure, wherein the assembly type shear wall structure mainly comprises a double-sided superposed shear wall structure and a fully-prefabricated grouting sleeve shear wall structure, the fully-prefabricated grouting sleeve shear wall structure is limited in application in partial areas due to the fact that the compactness of sleeve grouting is difficult to guarantee, and the transportation cost and the hoisting cost are greatly increased due to the fact that the wall body is completely prefabricated. The double-sided laminated shear wall structure develops most rapidly in recent years, but the current double-sided laminated shear wall structure has the following problems:
firstly, two-sided superimposed shear wall comprises first skin wall and second skin wall, need when the mill is prefabricated with first skin wall maintenance drawing of patterns back with first skin wall and second skin wall coincide again, the preparation process is complicated, the production period is long, and it is corresponding to need ensure the position of two skin walls at the coincide in-process, and the gross thickness of accurate control superimposed wall, it is expensive to lead to not only production facility, and the relative position of two skin walls probably has the deviation, the decline that has led to the component precision and the rising of cost of manufacture.
Secondly, the thickness d of the single-side leather wall of the double-sided superposed shear wall is more than or equal to 50mm, so that the self weight of the double-sided superposed shear wall is larger, the requirement on the power of transportation and hoisting equipment is higher, and the transportation and hoisting cost is high.
In summary, an urgent need exists in the art to provide a connector and a prefabricated laminated wall thereof, which are capable of accurately positioning, simple in production process, reliable in performance and convenient for connecting members.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a positioning connector, one end of which is connected to a member to be connected in a pre-embedded manner, and the other end of which is connected to a member of another member to be connected by a bolt, so as to achieve accurate positioning connection of the members to be connected, and the positioning connector has a simple structure, is convenient to manufacture, and is convenient and reliable to connect.
In addition, the invention also provides a prefabricated anti-seismic superposed wall comprising the positioning connecting piece and a construction method for the prefabricated anti-seismic superposed wall.
In order to achieve the above purpose, the invention provides the following technical scheme:
a positioning connecting piece comprises an I-shaped base, an inverted cone-shaped sleeve, a base plate and a fastening bolt, wherein the I-shaped base comprises an upper flange plate, a lower flange plate and a web member, the lower flange plate is parallel to the upper flange plate, and two ends of the web member are respectively and vertically connected with the upper flange plate and the lower flange plate;
the upper flange plate and the web member are provided with threaded holes which are communicated with each other and used for mounting the fastening bolts, and the axis of each threaded hole is parallel to the extending direction of the web member;
the pre-buried setting of bottom flange board, the telescopic little terminal surface of back taper with upper limb flange board butt, fastening bolt passes in proper order the through-hole of backing plate the telescopic through-hole of back taper with the I shape base is connected, so that the backing plate with form the centre gripping district between the back taper sleeve.
Preferably, at least one annular barb is arranged in the through hole of the inverted cone-shaped sleeve.
A prefabricated anti-seismic superposed wall comprises upper-layer distributed steel bars, lower-layer distributed steel bars, a prefabricated concrete layer, 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 through tie bars and/or truss steel bars, and the lower-layer distributed steel bars, lower flange plates of the positioning connecting pieces and lower end hooks of the tie bars are all pre-embedded in the prefabricated concrete layer;
positioning connection's web member passes lower floor's distribution reinforcement, positioning connection's back taper sleeve passes upper strata distribution reinforcement, positioning connection's fastening bolt passes in proper order the through-hole of template behind the telescopic through-hole of back taper with positioning connection's I shape base is connected, so that enclose the template with between the precast concrete layer, be used for the cavity of pouring the concrete after the site pouring.
Preferably, the truss reinforcing steel bars are arranged between the upper-layer distributed reinforcing steel bars and the lower-layer distributed reinforcing steel bars, and the truss reinforcing steel bars are used for partially or completely replacing the tie bars;
the truss steel bars comprise at least one upper layer steel bar and at least two lower layer steel bars, and the upper layer steel bar and the lower layer steel bar are welded and connected one by one through steel wires, steel bars or steel strands to form an N-shaped structure or an M-shaped structure;
the upper reinforcing steel bar with upper distribution reinforcement ligature or welded connection, lower floor's reinforcing steel bar with lower floor's distribution reinforcement ligature or welded connection, just lower floor's reinforcing steel bar bury in advance in the precast concrete layer.
Preferably, the clear distance between the outer edge of the upper distributed steel bar and the precast concrete layer is greater than or equal to 100 mm.
Preferably, the concrete post-cast structure further comprises a heat insulation layer arranged between the template and the upper-layer distributed steel bars, and the heat insulation layer is not in contact with the inner surface of the template and the outer surface of the upper-layer distributed steel bars so as to reserve a casting space of the post-cast concrete.
A construction method for the prefabricated earthquake-resistant superimposed wall as defined in any one of the above, comprising:
connecting upper-layer distributed steel bars and lower-layer distributed steel bars by using tie bars and/or truss steel bars to form a steel bar cage;
a plurality of positioning connecting pieces are arranged on the reinforcement cage in a penetrating manner, the lower flange plate of each positioning connecting piece protrudes out of the outer edge of the lower-layer distributed reinforcement, and the large end surface of the inverted cone-shaped sleeve of each positioning connecting piece protrudes out of the outer edge of the upper-layer distributed reinforcement;
pouring a precast concrete layer, and embedding the lower end hook of the tie bar, the lower-layer distributed steel bar and the lower flange plate in the precast concrete layer in advance;
fixing a template between the head of the fastening bolt and the large end face of the inverted cone-shaped sleeve by using the fastening bolt to finish the assembly of the prefabricated wall;
transporting and hoisting the prefabricated wall body to a construction position, connecting the prefabricated wall body with the edge member, and pouring post-cast concrete;
and after the post-cast concrete reaches the preset strength, disassembling the fastening bolt, the template and the inverted cone-shaped sleeve, and filling and replenishing the slurry.
Preferably, when the edge member is a straight edge member and the longitudinal bars of the edge member are in binding connection, the reinforcement cage of the edge member and the prefabricated wall body are integrally prefabricated and molded.
Preferably, when the edge member is not a straight edge member or the longitudinal rib of the edge member is in non-binding connection, the connecting the prefabricated wall body and the edge member includes:
prefabricating or manufacturing a reinforcement cage of the edge member on site;
transferring the reinforcement cage of the edge member to a design position, wherein a gap exists between the reinforcement cage of the edge member and the prefabricated wall body;
and uniformly placing horizontal connecting steel bars in the gap between the steel bar cage of the edge member and the prefabricated wall body.
When the positioning connecting piece is used, the lower flange plate of the I-shaped base is pre-buried in a member to be connected, so that the web member is vertical to the surface of the member; aligning the I-shaped base, the inverted cone sleeve, the other component to be connected and the base plate, and sequentially passing the fastening bolt through the through hole of the base plate, the through hole of the other component to be connected and the through hole of the inverted cone sleeve and then connecting the fastening bolt with the I-shaped base through threads, thereby connecting the two components.
Taking the prefabricated anti-seismic superposed wall as an example, the lower flange plate of the I-shaped base is embedded in a prefabricated concrete layer, and the upper flange plate is exposed; placing the steel reinforcement cage and the inverted cone-shaped sleeve, and aligning the through hole of the inverted cone-shaped sleeve with the threaded hole of the I-shaped base; placing a template on the large end face of the inverted cone-shaped sleeve, aligning the through hole of the template with the through hole of the inverted cone-shaped sleeve, and connecting the template, the inverted cone-shaped sleeve and the precast concrete layer by using a fastening bolt and a base plate; after the prefabricated connection is completed, the prefabricated structure is transported and hoisted to a design position, and concrete is poured after pouring; and after the concrete reaches a certain strength, disassembling the fastening bolt, the base plate, the template and the inverted cone sleeve for repeated use.
Therefore, the positioning connecting piece provided by the invention integrates positioning and connecting, has a simple structure, is convenient to manufacture and disassemble, effectively ensures the accurate relative position of the members to be connected, can repeatedly utilize the fastening bolt, the base plate and the inverted cone-shaped sleeve, and has low cost and high benefit.
Meanwhile, a cavity can be arranged between the two members connected by the positioning connecting piece, so that the overall quality of the fabricated building is favorably reduced, and the cost and the difficulty of transportation and hoisting are reduced.
In addition, the invention also provides a prefabricated earthquake-resistant superposed wall comprising the positioning connecting piece and a construction method for the prefabricated earthquake-resistant superposed 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 view of an embodiment of a positioning connection provided by the present invention;
FIG. 2 is a schematic structural view of the reverse taper sleeve of FIG. 1;
FIG. 3 is a schematic top view of a prefabricated earthquake-resistant laminated wall according to a first embodiment of the present invention;
FIG. 4 is a schematic top view of a second embodiment of the prefabricated earthquake-resistant laminated wall according to the present invention;
fig. 5 is a schematic top view of a prefabricated earthquake-resistant laminated wall according to a third embodiment of the present invention;
FIG. 6 is a schematic top view of a prefabricated earthquake-resistant laminated wall according to a fourth embodiment of the present invention;
FIG. 7 is a schematic top view of a fifth embodiment of the prefabricated earthquake-resistant laminated wall provided by the present invention;
FIG. 8 is a schematic top view of a sixth embodiment of a prefabricated earthquake resistant laminated wall according to the present invention;
FIG. 9 is a schematic view showing the arrangement of tie bars and positioning connectors in the prefabricated earthquake-resistant laminated wall according to the present invention;
fig. 10 is an assembly view of the prefabricated wall body and the L-shaped edge member of the prefabricated earthquake-resistant overlapped wall according to the present invention;
FIG. 11 is a schematic view of the prefabricated wall body and the linear edge member of the prefabricated earthquake-resistant laminated wall according to the present invention;
fig. 12 is a schematic view of the reinforcement cage of the edge member.
In fig. 1-12:
11 is the I-shaped base, 12 is the back taper sleeve, 121 is cyclic annular barb, 13 is fastening bolt, 14 is the backing plate, 2 is upper distribution reinforcing bar, 3 is lower floor distribution reinforcing bar, 4 is the drawknot muscle, 5 is the truss reinforcing bar, 6 is precast concrete layer, 7 is the cavity, 8 is the heat preservation, 9 is the template, 10 is the edge component, 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 positioning connecting piece, one end of which is connected with a component to be connected in an embedded manner, and the other end of which is connected with a component of another component to be connected by a bolt, so that the accurate positioning connection of the components to be connected is realized, and the positioning connecting piece has the advantages of simple structure, convenience in manufacturing and convenience and reliability in connection.
In addition, the invention also provides a prefabricated earthquake-resistant superposed wall comprising the positioning connecting piece and a construction method for the prefabricated earthquake-resistant superposed wall.
Please refer to fig. 1-12.
The invention provides a positioning connecting piece, which comprises an I-shaped base 11, an inverted cone-shaped sleeve 12, a base plate 14 and a fastening bolt 13, wherein the I-shaped base 11 comprises an upper flange plate, a lower flange plate and a web member, the lower flange plate is parallel to the upper flange plate, and two ends of the web member are respectively and vertically connected with the upper flange plate and the lower flange plate;
the upper flange plate and the web member are provided with threaded holes which are communicated and used for installing the fastening bolts 13, and the axis of each threaded hole is parallel to the extending direction of the web member;
the lower flange plate is pre-buried, the small end face of the inverted cone sleeve 12 is abutted to the upper flange plate, and the fastening bolt 13 sequentially penetrates through the through hole of the backing plate 14 and the through hole of the inverted cone sleeve 12 to be connected with the I-shaped base 11, so that a clamping area is formed between the backing plate 14 and the inverted cone sleeve 12.
Referring to fig. 1, the lower flange plate of the i-shaped base 11 is pre-embedded in the member (including the precast concrete layer 6, the formwork 9, etc.) to be connected, and both the web member and the upper flange plate of the i-shaped base 11 may be pre-embedded in the member or may extend out of the surface of the member, as long as the large end surface of the inverted cone-shaped sleeve 12 is located outside the member.
The upper flange plate and the lower flange plate of the I-shaped base 11 can be welded at two ends of the web member and can also be in threaded connection with the web member, the upper flange plate and the lower flange plate can also be arranged into an integrated structure, and the integrated structure is integrally formed by casting and threaded holes are machined by turning and the like.
The shapes of the upper flange plate, the lower flange plate and the web member of the I-shaped base 11 are not limited, the upper flange plate and the lower flange plate can be set to be in the shapes of a circle, a rectangle, a triangle and the like, and the web member can be set to be in the shapes of a cylinder, a circular truncated cone, a prism and the like. Preferably, the axis of the upper flange plate, the axis of the web member and the axis of the lower flange plate may all be collinear.
The upper flange plate and the web member of the i-shaped base 11 are provided with threaded holes for mounting the fastening bolts 13, preferably, the axes of the threaded holes and the axes of the web member are collinear, i.e., the threaded holes are arranged in the center of the web member, so that the size of the web member is reduced on the premise of ensuring the structural strength of the web member.
The back taper sleeve 12 is placed on the upper end face of the upper flange plate of the I-shaped base 11, a through hole for mounting the fastening bolt 13 is formed in the back taper sleeve 12, and the through hole of the back taper sleeve 12 is usually arranged in the center of the back taper sleeve 12 in consideration of the processing difficulty and the overall stress condition.
In order to facilitate the disassembly of the inverted cone-shaped sleeve 12 after the two components are connected through the post-cast concrete, the inverted cone-shaped sleeve 12 is in an inverted cone shape, so that the inverted cone-shaped sleeve 12 can be disassembled in the post-cast concrete in a demolding manner. The taper of the outer circumferential surface of the inverted cone sleeve 12 is determined by referring to the prior art according to factors such as the type and size of post-cast concrete in actual construction, and details are not repeated here.
Preferably, at least one annular barb 121 may be provided in the through hole of the reverse taper sleeve 12 to facilitate removal of the reverse taper sleeve 12 when the reverse taper sleeve 12 is wrapped with post-cast concrete or the like. The specific shape, size and arrangement position of the annular barb 121 are determined according to actual construction requirements, and are not described in detail herein.
In order to facilitate the repeated use of the inverted cone-shaped sleeve 12, preferably, the inverted cone-shaped sleeve 12 can be a plastic sleeve, the weight is light, batch production can be realized in an injection molding mode, the manufacturing cost is low, and the demolding and the repeated use are convenient.
The length L of the inverted conical sleeve 12, the height h of the I-shaped base 11, the embedded depth D of the I-shaped base 11 and the distance D between the two members to be connected satisfy the following relationship: and D is L + h-D, wherein the pre-buried depth D of the I-shaped base 11 is the distance from the surface of the component close to the inverted cone-shaped sleeve 12 to the lower end face of the lower flange plate.
Considering that the connection strength between the i-shaped base 11 and the component is affected by the embedded depth d of the i-shaped base 11, and the adjustable range of the embedded depth d of the i-shaped base 11 is relatively small, the design distance requirement of the two components to be connected is usually satisfied by adjusting the length L of the inverted cone-shaped sleeve 12 and the height h of the i-shaped base 11.
The fastening bolt 13 passes through the through hole of the backing plate 14 and the through hole of the inverted cone-shaped sleeve 12 to be connected with the I-shaped base 11, and one part of the fastening force of the fastening bolt 13 is used for offsetting the lateral pressure of post-cast concrete between two connected members to the members on two sides; the other part is transmitted to the inverted cone-shaped sleeve 12 through the component, so that two ends of the inverted cone-shaped sleeve 12 are tightly attached to the surface of the component and the upper end surface of the upper flange plate, and the relative position relation of the two components to be connected is favorably ensured.
The fastening bolts 13 are mostly hexagon head bolts, and the specific types, materials and sizes of the I-shaped base 11, the inverted cone-shaped sleeve 12 and the fastening bolts 13 are checked, calculated and determined according to the design connection strength requirement in actual construction.
For example, the strength and rigidity of the web members of the i-shaped base 11 should be greater than or equal to the strength and rigidity of the stressed steel bars in the member; the compressive strength of the inverted cone-shaped sleeve 12 and the tensile strength of the fastening bolt 13 should both be greater than the maximum lateral pressure of the post-cast concrete to the member.
The backing plate 14 is arranged between the bolt head of the fastening bolt 13 and the member to be connected, and the size of the backing plate 14 is larger than that of the through hole of the member to be connected, so that concrete overflow is prevented when post-cast concrete is poured; the bearing plate 14 can also be dispensed with when the size of the head of the fastening screw 13 is greater than the size of the through-hole of the component to be connected.
The backing plate 14 is provided with a through hole for the fastening bolt 13 to pass through, and the diameter of the through hole is slightly larger than the outer diameter of the fastening bolt 13; the backing plate 14 may be configured in any geometric shape such as a circle, a diamond, a polygon, etc., and may also be made of any material having a certain bending strength, such as steel, plastic, alloy, etc.
When in use, the lower flange plate of the I-shaped base 11 is pre-buried in a member to be connected, so that the web member is vertical to the surface of the member; aligning the I-shaped base 11, the inverted cone sleeve 12, another component to be connected and the backing plate 14, and sequentially passing the fastening bolt 13 through the through hole of the backing plate 14, the through hole of the other component to be connected and the through hole of the inverted cone sleeve 12 and then connecting the two components with the I-shaped base 11 by screw thread.
Taking the prefabricated earthquake-resistant superposed wall as an example, please refer to fig. 3-8, the lower flange plate of the i-shaped base 11 is pre-buried in the prefabricated concrete layer 6, and the upper flange plate is exposed; placing a steel reinforcement cage and the inverted cone-shaped sleeve 12, and aligning the through hole of the inverted cone-shaped sleeve 12 with the threaded hole of the I-shaped base 11; placing a template 9 on the large end face of the inverted cone-shaped sleeve 12, aligning the through hole of the template 9 with the through hole of the inverted cone-shaped sleeve 12, and connecting the template 9 and the inverted cone-shaped sleeve 12 with the precast concrete layer 6 by using a fastening bolt 13 and a backing plate 14; after the prefabricated connection is finished, the prefabricated structure is transported and hoisted to a design position, and post-cast concrete is poured; after the concrete reaches a certain strength, the fastening bolts 13, the backing plate 14, the template 9 and the inverted cone-shaped sleeve 12 are disassembled for repeated use.
In this embodiment, the positioning connection piece integrates positioning and connection, has a simple structure, is convenient to manufacture and disassemble, effectively ensures that the relative positions of the members to be connected are accurate, and the fastening bolt 13, the backing plate 14 and the inverted cone-shaped sleeve 12 can be repeatedly utilized, so that the cost is low and the benefit is high.
Meanwhile, a cavity 7 can be arranged between the two members connected by the positioning connecting piece, so that the overall quality of the fabricated building is favorably reduced, and the cost and difficulty of transportation and hoisting are reduced.
Preferably, considering the pre-buried arrangement of the lower flange plate of the i-shaped base 11, in order to prevent the i-shaped base 11 from being corroded, the i-shaped base 11 may be made of corrosion-resistant materials such as stainless steel, titanium alloy, high-strength plastics, and the like.
Of course, the i-shaped base 11 may also be made of a common steel material, and in order to prevent the i-shaped base from being exposed to air for a long time and being rusted, an anti-rust gasket made of a corrosion-resistant material needs to be arranged on the lower end surface of the lower flange plate; the thickness of the antirust gasket is set to be 5-40mm mostly, and the antirust gasket is made of inorganic nonmetallic materials such as cement mortar and fiber composite materials mostly.
In addition to the positioning connecting piece, the invention also provides a prefabricated anti-seismic superposed wall comprising the positioning connecting piece, the prefabricated anti-seismic superposed wall comprises upper-layer distributed steel bars 2, lower-layer distributed steel bars 3, a prefabricated concrete layer 6, a template 9 and a plurality of positioning connecting pieces disclosed by the embodiment, 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, and the lower-layer distributed steel bars 3, a lower flange plate of the positioning connecting piece and lower end hooks of the tie bars 4 are all embedded in the prefabricated concrete layer 6;
the web member of the positioning connecting piece penetrates through the lower-layer distributed reinforcing steel bars 3, the inverted cone-shaped sleeve 12 of the positioning connecting piece penetrates through the upper-layer distributed reinforcing steel bars 2, and the fastening bolt 13 of the positioning connecting piece sequentially penetrates through the through hole of the template 9 and the through hole of the inverted cone-shaped sleeve 12 and then is connected with the I-shaped base 11 of the positioning connecting piece so as to enclose a cavity 7 between the template 9 and the precast concrete layer 6 and used for pouring concrete after cast-in-place.
Referring to fig. 9, the upper distributed rebars 2 and the lower distributed rebars 3 may be configured as a rebar mesh, or may be configured as a rebar mesh formed by binding or welding a plurality of horizontal rebars and a plurality of vertical rebars, and the specific materials and sizes of the upper distributed rebars 2 and the lower distributed rebars 3 are determined according to the design strength requirements of actual construction, and are not described herein again.
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 prefabricated anti-seismic superposed wall; to ensure that the reinforcement cage can be completely wrapped by the post-cast concrete, it is preferable that the clear distance between the outer edge of the upper distribution reinforcement 2 and the precast concrete layer 6 should be greater than or equal to 100 mm.
Taking the tie bar 4 as an example, the upper end hook of the tie bar 4 is bound or welded with the upper-layer distributed steel bar 2, and the lower end hook of the tie bar 4 is bound or welded with the lower-layer distributed steel bar 3; the tie bars 4 are distributed in a quincuncial shape on the upper-layer distributed steel bars 2 and the lower-layer distributed steel bars 3, as shown in fig. 9.
Of course, the truss reinforcing steel bars 5 can be used to replace the tie bars 4, the truss reinforcing steel bars 5 are arranged between the upper-layer distributed reinforcing steel bars 2 and the lower-layer distributed reinforcing steel bars 3, and the truss reinforcing steel bars 5 are used to partially or completely replace the tie bars 4, as shown in fig. 4, 6 and 8;
the truss steel bars 5 comprise at least one upper layer steel bar and at least two lower layer steel bars, and the upper layer steel bar and the lower layer steel bar are welded and connected one by one through steel wires, steel bars or steel strands to form an N-shaped structure or an M-shaped structure;
upper reinforcing bar and 2 ligatures or welded connection of upper distributed reinforcement, lower floor's reinforcing bar and 3 ligatures or welded connection of lower floor's distributed reinforcement, and lower floor's reinforcing bar is pre-buried in precast concrete layer 6.
In order to ensure that the tension force applied to the distributed steel bars of the upper layer and the lower layer is relatively uniform, the tie bars 4 and/or the truss steel bars 5 can be uniformly arranged along the length direction of the steel bar cage, and the distance between two adjacent truss steel bars 5 can be set to be 200-800 mm.
In order to prevent the reinforcement cage from moving relative to the positioning connecting piece during transportation, the web member of the i-shaped base 11 may be bound to the reinforcement cage by steel wires, steel bars, steel strands, or the like, or may be directly welded to the reinforcement cage.
Preferably, the web members of the i-shaped base 11 may be located at the intersection of the steel bars of the steel reinforcement cage. The steel bar intersection point of the steel bar cage is a connection point of the horizontal steel bars and the vertical steel bars of the upper and lower layers of distributed steel bars, and the web members of the I-shaped base 11 are connected to the connection point, so that the steel bar cage can be effectively connected and fixed with the positioning connecting piece.
The precast concrete layer 6 is precast and formed in a factory, the lower distributed steel bars 3, the lower flange plates of the I-shaped base 11, the lower end hooks of the tie bars 4 and/or the lower steel bars of the truss steel bars 5 are pre-embedded in the precast concrete layer 6, the thickness of the precast concrete layer 6 and the pre-embedded depth of each component are determined according to the design requirements of actual construction, and the thickness of the precast concrete layer 6 is usually set to be 20-80 mm.
In order to enhance the adhesion between the precast concrete layer 6 and the post-cast concrete, a roughening or a concave-convex groove with a concave-convex depth of greater than or equal to 3mm is usually disposed on the inner surface of the precast concrete layer 6.
In addition, when pipeline pipelines are laid or doors and windows are arranged in the prefabricated earthquake-proof superposed wall, corresponding pipeline openings or door and window openings are reserved on the prefabricated concrete layer 6 and the template 9 so as to place corresponding molds.
The template 9 is arranged between the backing plate 14 and the small end face of the inverted-cone-shaped sleeve 12, and the template 9 is arranged in parallel with the inner surface of the precast concrete layer 6 to enclose a cavity 7 for casting concrete after cast-in-place.
Preferably, the template 9 includes a wooden template, a stainless steel template, a plastic template, an aluminum alloy template, a PVC skinning foaming plate, and a fiber reinforced composite plate. The concrete type of the template 9 is determined according to actual construction needs by referring to the prior art; the thickness of the template 9 is determined according to the material of the template 9, and the higher the structural strength of the template 9 is, the smaller the minimum thickness of the template 9 is.
During production, firstly, the tie bars 4 and/or the truss steel bars 5 are used for connecting the upper-layer distributed steel bars 2 and the lower-layer distributed steel bars 3 to form a steel bar cage; then, a plurality of positioning connecting pieces are arranged on the steel reinforcement cage in a penetrating mode, so that the lower flange plates of the positioning connecting pieces protrude out of the outer edge of the lower-layer distributed steel reinforcements 3, and the large end faces of the inverted cone-shaped sleeves 12 of the positioning connecting pieces protrude out of the outer edge of the upper-layer distributed steel reinforcements 2; and finally, pouring a precast concrete layer 6, embedding the lower distributed steel bars 3, the lower flange plates, the lower hooks of the tie bars 4 and/or the lower steel bars of the truss steel bars 5 in the precast concrete layer 6, and tightly pressing and connecting the template 9 on the upper flange plate of the I-shaped base 11 by using the fastening bolts 13 to complete factory prefabrication of the precast wall body.
After prefabrication is completed, the prefabricated wall bodies are transported and hoisted to the design positions, and the prefabricated wall bodies are connected according to the design requirements, or the prefabricated wall bodies and the edge members 10 are connected; after the connection is finished, the formwork is erected for pouring post-cast concrete; and after the post-cast concrete reaches the preset strength, disassembling the fastening bolt 13, the template 9 and the inverted cone-shaped sleeve 12, and filling and replenishing the slurry.
In this embodiment, utilize the accurate location of positioning connection spare and connect steel reinforcement cage, precast concrete layer 6 and template 9 to accomplish the construction of prefabricated wall body, compare in current two-sided coincide shear wall, only need prefabricated a side wall body, not only production technology is simple convenient, and production technology obviously shortens, has still avoided the assembly precision problem of both sides wall body, has reduced the wasting of resources.
Meanwhile, the prefabricated wall body only has half of the mass of the double-sided superposed shear wall, so that the transportation load is effectively reduced, and the transportation and the hoisting of the prefabricated anti-seismic superposed wall are greatly facilitated.
In addition, compared with a double-sided superposed shear wall with the same thickness, the prefabricated anti-seismic superposed wall has larger operable space during site construction, is favorable for pouring, vibrating and quality inspection of post-cast concrete, is convenient to construct and is favorable for improving the construction quality.
On the basis of the above embodiment, please refer to fig. 7 and 8, the prefabricated anti-seismic laminated wall further includes an insulating layer 8 disposed between the formwork 9 and the upper-layer distributed steel bars 2, and the surface of the insulating layer 8 is not in contact with the inner surface of the formwork 9 and the outer surface of the upper-layer distributed steel bars 2, so as to reserve a casting space for post-cast concrete.
The type and thickness of the heat-insulating layer 8 are determined according to the building heat-insulating regulation reference prior art in each region, and the distance d1 between the heat-insulating layer 8 and the inner surface of the template 9 and the distance d2 between the heat-insulating layer 8 and the outer surface of the upper-layer distribution steel bar 2 are determined according to the actual construction needs, and are not described again.
In the embodiment, a certain distance is reserved between the heat-insulating layer 8 and the template 9 and between the heat-insulating layer and the upper-layer distributed steel bars 2, which is beneficial to completely wrapping the upper-layer distributed steel bars 2 in the post-cast concrete so that the upper-layer distributed steel bars 2 and the post-cast concrete are stressed cooperatively; and the heat-insulating layer 8 has the protection of post-cast concrete with certain thickness, and can play the roles of corrosion resistance and fire resistance.
In addition, the invention also provides a construction method for the prefabricated earthquake-resistant superposed wall disclosed by 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 and/or truss steel bars 5 to form a steel bar cage;
step S2, a plurality of positioning connecting pieces are arranged on the reinforcement cage in a penetrating mode, the lower flange plates of the positioning connecting pieces protrude the outer edge of the lower-layer distributed reinforcement 3, and the large end face of the inverted cone-shaped sleeve 12 of each positioning connecting piece protrudes the outer edge of the upper-layer distributed reinforcement 2;
step S3, pouring a precast concrete layer 6, and embedding the lower end hook of the tie bar 4, the lower-layer distributed steel bar 3 and the lower flange plate in the precast concrete layer 6;
step S4, fixing the template 9 between the head of the fastening bolt 13 and the large end face of the inverted cone-shaped sleeve 12 by using the fastening bolt 13, and completing the assembly of the prefabricated wall;
step S5, 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 S6, after the post-cast concrete reaches the preset strength, the fastening bolt 13, the template 9 and the inverted cone-shaped sleeve 12 are disassembled, and the slurry is filled.
It should be noted that in step S5, as shown in fig. 10 and 11, the edge member 10 includes a plurality of types, such as a straight edge member, an L-shaped edge member, and a T-shaped edge member, and the type of the edge member 10 and the type of the reinforcement cage of the edge member 10 affect the connection manner between the edge member 10 and the prefabricated wall.
Preferably, when the edge member 10 is a straight edge member and the longitudinal ribs 101 of the edge member 10 are connected by binding, the reinforcement cage of the edge member 10 can be prefabricated and formed integrally with the prefabricated wall.
Referring to fig. 11, the longitudinal ribs 101 of the linear edge member are bound or welded to the upper and lower layers of the prefabricated wall, the longitudinal ribs 101 are sleeved with stirrups 102, and tie bars 4 are arranged between the upper and lower layers of the longitudinal ribs; the precast concrete layer 6 of the linear edge member is connected with the precast concrete layer 6 of the precast wall body; the template 9 of the straight edge member is spliced with the template 9 of the prefabricated wall body, or the two templates 9 share the same template 9.
Preferably, referring to fig. 10, when the edge member 10 is a non-linear edge member or the longitudinal ribs 101 of the edge member 10 are in non-binding connection, the method for connecting the prefabricated wall body and the edge member 10 includes:
step S51, prefabricating or manufacturing the reinforcement cage of the edge member 10 on site, wherein a gap exists between the reinforcement cage of the edge member 10 and the prefabricated wall;
step S52, placing the horizontal connecting steel bars 103 evenly in the gap between the reinforcement cage of the edge member 10 and the prefabricated wall.
It should be noted that, in step S51, the order of the reinforcement cage of the edge member 10 and the prefabricated wall to be hoisted on site is not limited, and the prefabricated wall may be hoisted first and then the reinforcement cage of the edge member 10 may be fabricated, or the prefabricated wall may be hoisted after the reinforcement cage of the edge member 10 is fabricated.
When the longitudinal ribs 101 of the edge member 10 are not adapted to be connected by means of binding, the longitudinal ribs 101 of the edge member 10 may be connected by means of mechanical connection, grouting, welding, etc.
It should be noted that in step S52, the horizontal connecting bar 103 is generally disposed at the center of the connecting surface of the edge member 10, and the horizontal connecting bar 103 is uniformly disposed along the height direction of the prefabricated earthquake-resistant overlapped wall.
The shape of the horizontal connecting bar 103 is not limited, and may be bent into a rectangular shape as shown in fig. 10, or may be bent into a circular shape or other geometric shapes.
It should be noted that in step S6, when the distance from the form 9 to the precast concrete layer 6 is greater than or equal to 200mm, that is, the width of the cavity 7 is greater than or equal to 200mm, ordinary concrete is poured; otherwise, self-compacting concrete or fine aggregate concrete is 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 positioning connecting piece, the prefabricated earthquake-proof superposed 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 positioning connecting piece is characterized by comprising an I-shaped base, an inverted cone-shaped sleeve, a base plate and a fastening bolt, wherein the I-shaped base comprises an upper flange plate, a lower flange plate and a web member, the lower flange plate is parallel to the upper flange plate, and two ends of the web member are respectively and vertically connected with the upper flange plate and the lower flange plate;
the upper flange plate and the web member are provided with threaded holes which are communicated with each other and used for mounting the fastening bolts, and the axis of each threaded hole is parallel to the extending direction of the web member;
the pre-buried setting of bottom flange board, the telescopic little terminal surface of back taper with upper limb flange board butt, fastening bolt passes in proper order the through-hole of backing plate the telescopic through-hole of back taper with the I shape base is connected, so that the backing plate with form the centre gripping district between the back taper sleeve.
2. The locating connection of claim 1, wherein the through bore of the inverted cone sleeve has at least one annular barb disposed therein.
3. A prefabricated earthquake-resistant superposed wall is characterized by comprising upper-layer distributed steel bars, lower-layer distributed steel bars, a prefabricated concrete layer, a template and a plurality of positioning connecting pieces according to claim 1 or 2, wherein the upper-layer distributed steel bars and the lower-layer distributed steel bars are connected through tie bars and/or truss steel bars, and the lower-layer distributed steel bars, lower flange plates of the positioning connecting pieces and lower end hooks of the tie bars are all pre-embedded in the prefabricated concrete layer;
the web member of positioning connection spare passes lower floor's distributed reinforcement, positioning connection spare's back taper sleeve passes upper strata distributed reinforcement, positioning connection spare's fastening bolt passes in proper order the through-hole of template behind the telescopic through-hole of back taper with positioning connection spare's I shape base is connected, so that enclose the template with between the precast concrete layer, be used for pouring the cavity of concrete after the site pouring.
4. A prefabricated earthquake-resistant superimposed wall according to claim 3, wherein the truss reinforcing steel bars are arranged between the upper layer of distributed reinforcing steel bars and the lower layer of distributed reinforcing steel bars, and the truss reinforcing steel bars are used for partially or completely replacing the tie bars;
the truss steel bars comprise at least one upper layer steel bar and at least two lower layer steel bars, and the upper layer steel bar and the lower layer steel bar are welded and connected one by one through steel wires, steel bars or steel strands to form an N-shaped structure or an M-shaped structure;
the upper reinforcing steel bar with upper distribution reinforcement ligature or welded connection, lower floor's reinforcing steel bar with lower floor's distribution reinforcement ligature or welded connection, just lower floor's reinforcing steel bar bury in advance in the precast concrete layer.
5. The prefabricated earthquake-resistant superimposed wall as claimed in claim 4, wherein the clear distance between the outer edge of the upper distributed steel bars and the prefabricated concrete layer is greater than or equal to 100 mm.
6. A prefabricated anti-seismic superimposed wall according to any one of claims 3-5, further comprising a heat-insulating layer arranged between the formwork and the upper-layer distributed steel bars, wherein the heat-insulating layer is not in contact with the inner surface of the formwork and the outer surface of the upper-layer distributed steel bars, so that a pouring space for the post-cast concrete is reserved.
7. A construction method for the prefabricated earthquake-resistant laminated wall as defined in any one of claims 3 to 6, comprising:
connecting upper-layer distributed steel bars and lower-layer distributed steel bars by using tie bars and/or truss steel bars to form a steel bar cage;
a plurality of positioning connecting pieces are arranged on the reinforcement cage in a penetrating manner, the lower flange plate of each positioning connecting piece protrudes out of the outer edge of the lower-layer distributed reinforcement, and the large end surface of the inverted cone-shaped sleeve of each positioning connecting piece protrudes out of the outer edge of the upper-layer distributed reinforcement;
pouring a precast concrete layer, and embedding the lower end hook of the tie bar, the lower-layer distributed steel bar and the lower flange plate in the precast concrete layer in advance;
fixing a template between the head of the fastening bolt and the large end face of the inverted cone-shaped sleeve by using the fastening bolt to finish the assembly of the prefabricated wall;
transporting and hoisting the prefabricated wall body to a construction position, connecting the prefabricated wall body with the edge member, and pouring post-cast concrete;
and after the post-cast concrete reaches the preset strength, disassembling the fastening bolt, the template and the inverted cone-shaped sleeve, and filling and replenishing the slurry.
8. The construction method according to claim 7, wherein when the edge member is a straight edge member and the longitudinal bars of the edge member are connected by binding, the reinforcement cage of the edge member is prefabricated and formed integrally with the prefabricated wall.
9. The construction method according to claim 7, wherein when the edge member is not a straight edge member or the longitudinal rib of the edge member is in non-binding connection, the connecting the prefabricated wall body and the edge member comprises:
prefabricating or manufacturing a reinforcement cage of the edge member on site;
transferring the reinforcement cage of the edge member to a design position, wherein a gap exists between the reinforcement cage of the edge member and the prefabricated wall body;
and uniformly placing horizontal connecting steel bars in the gap between the steel bar cage of the edge member and the prefabricated wall body.
CN202210766915.8A 2022-07-01 2022-07-01 Positioning connecting piece, prefabricated anti-seismic superposed wall and construction method thereof Pending CN115095054A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115717455A (en) * 2022-11-24 2023-02-28 中国建筑第二工程局有限公司 Precise positioning device for cast-in-place reinforced concrete template and reinforcing steel bar and construction method
CN115726496A (en) * 2022-11-15 2023-03-03 海南大学 Anti-seismic superposed shear wall structure and construction method thereof

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
CN115717455A (en) * 2022-11-24 2023-02-28 中国建筑第二工程局有限公司 Precise positioning device for cast-in-place reinforced concrete template and reinforcing steel bar and construction method
CN115717455B (en) * 2022-11-24 2024-05-14 中国建筑第二工程局有限公司 Accurate positioning device for cast-in-situ reinforced concrete formwork and steel bar and construction method

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