CN115095053A - Anti-seismic superposed wall and construction method thereof - Google Patents

Anti-seismic superposed wall and construction method thereof Download PDF

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Publication number
CN115095053A
CN115095053A CN202210766897.3A CN202210766897A CN115095053A CN 115095053 A CN115095053 A CN 115095053A CN 202210766897 A CN202210766897 A CN 202210766897A CN 115095053 A CN115095053 A CN 115095053A
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China
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layer
template
steel bars
flange plate
web member
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CN202210766897.3A
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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 CN202210766897.3A priority Critical patent/CN115095053A/en
Publication of CN115095053A publication Critical patent/CN115095053A/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
    • E04B2/8623—Walls made by casting, pouring, or tamping in situ made in permanent forms with spacers and at least one form leaf being monolithic
    • 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
    • E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/0604—Prismatic or cylindrical reinforcement cages composed of longitudinal bars and open or closed stirrup rods
    • 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
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
    • E04G11/08—Forms, which are completely dismantled after setting of the concrete and re-built for next pouring
    • E04G11/085—End form panels for walls
    • 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

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological 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 fabricated buildings and discloses an anti-seismic superposed wall and a construction method thereof, wherein the anti-seismic superposed wall comprises upper-layer distributed reinforcing steel bars, lower-layer distributed reinforcing steel bars, a precast concrete layer, a template and a plurality of positioning connecting pieces, wherein each positioning connecting piece comprises a web member and upper and lower flange plates vertically connected to two ends of the web member, the upper flange plate is provided with a through hole, the web member is provided with a threaded hole which is coaxial with the through hole and is used for installing a fastening bolt, and the length of the threaded hole is smaller than that of the web member; the upper-layer distributed steel bars and the lower-layer distributed steel bars are connected through tie bars, and lower-end hooks of the lower-layer distributed steel bars, the lower flange plates and the tie bars are all embedded in the precast concrete layer; the web members penetrate through the reinforcement cage to enable the upper flange plates to extend out of the reinforcement cage, the inner surface of the template is tightly attached to the outer surface of the upper flange plates, and the fastening bolts penetrate through the through holes of the template to be connected with the upper flange plates so as to enclose a cavity for pouring post-cast concrete. Therefore, the production process flow is greatly simplified, the construction is convenient and fast, and the construction period is obviously shortened.

Description

Anti-seismic superposed wall and construction method thereof
Technical Field
The invention relates to the technical field of assembly type buildings, in particular to an anti-seismic laminated wall. In addition, the invention also relates to a construction method for the anti-seismic superimposed wall.
Background
Due to the fact that the prefabricated double-faced superposed wall has the advantages of being green in construction characteristics and good in integrity of a traditional cast-in-place shear wall, the prefabricated double-faced superposed wall becomes an assembly type building with wide application prospect.
In the prior art, the construction process of the double-faced superposed shear wall comprises the manufacture of a first skin wall and the manufacture of a second skin wall, and the manufacture flow of the first skin wall is as follows: cleaning side forms and mould tables, assembling moulds, brushing a release agent, arranging and binding reinforcing steel bars, installing embedded parts, distributing concrete, vibrating concrete, curing concrete, and demoulding; the manufacturing process of the second leather wall is as follows: assembling a mould, brushing a release agent, distributing and paving concrete, reversely pressing and superposing a first skin wall, vibrating and curing the concrete, demolding and warehousing. Before the first leather wall and the second leather wall are overlapped, the first leather wall needs to be maintained, demoulded and then overlapped with the second leather wall, so that the manufacturing process is complex and the production period is longer.
In summary, how to provide an assembly type building convenient for production is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the invention aims to provide an anti-seismic superposed wall, which is characterized in that a precast concrete layer, a reinforcement cage and a template are tied by utilizing a positioning connecting piece in cooperation with a fastening bolt, the production process flow is greatly simplified, the construction is convenient, and the construction period is obviously shortened.
In addition, the invention also provides a construction method for the anti-seismic superimposed wall.
In order to achieve the above purpose, the invention provides the following technical scheme:
an anti-seismic superposed wall comprises upper-layer distributed reinforcing steel bars, lower-layer distributed reinforcing steel bars, a precast concrete layer, a template and a plurality of I-shaped positioning connecting pieces, wherein each positioning connecting piece comprises a web member, an upper flange plate and a lower flange plate, the upper flange plate and the lower flange plate are vertically connected to two ends of the web member, each upper flange plate is provided with a through hole, each web member is provided with a threaded hole for mounting a fastening bolt, the threaded holes and the through holes of the upper flange plates are coaxially arranged, and the length of each threaded hole is smaller than that of the corresponding web member;
the upper-layer distributed steel bars and the lower-layer distributed steel bars are connected through tie bars to form a steel bar cage, and the lower-layer distributed steel bars, the lower flange plates and lower hooks of the tie bars are all pre-embedded in the precast concrete layer;
the web member passes the steel reinforcement cage so that the upper flange plate stretches out outside the steel reinforcement cage, the internal surface of template with the surface of upper flange plate closely laminates, fastening bolt passes the through-hole of template with the web member is connected, in order to utilize the template with precast concrete layer encloses into the cavity that is used for pouring post-cast concrete.
Preferably, the shape and size of the upper flange plate are the same as those of the lower flange plate.
Preferably, fastening bolt with be equipped with the backing plate between the template, the backing plate size is greater than the size of the through-hole of template, just the backing plate is equipped with and is used for the installation fastening bolt's through-hole.
Preferably, the positioning connecting piece is externally provided with an antirust gasket for preventing the positioning connecting piece from being rusted, and the antirust gasket is 5-40mm in thickness.
Preferably, the web member set up in steel reinforcement intersection point department of steel reinforcement cage, the web member with steel reinforcement cage ligature or welded connection.
Preferably, the template comprises a wood template, a steel template, a plastic template, an aluminum alloy template, a PVC skinning foaming plate and a fiber reinforced composite plate.
Preferably, the heat-insulating layer is arranged between the template and the upper-layer distributed steel bars, and gaps exist between the heat-insulating layer and the inner surface of the template and between the heat-insulating layer and the outer surface of the upper-layer distributed steel bars.
A method of constructing an earthquake-resistant laminated wall as defined in any one of the preceding claims, comprising:
connecting upper-layer distributed steel bars and lower-layer distributed steel bars by using tie bars to form a steel bar cage;
arranging a plurality of positioning connectors in the reinforcement cage, and enabling upper flange plates and lower flange plates of the positioning connectors to extend out of the reinforcement cage;
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, wherein the thickness of the precast concrete layer is more than or equal to 50 mm;
placing a template outside the upper flange plate, and connecting the template and the upper flange plate by using a fastening bolt to finish the assembly of the prefabricated wall body;
transporting and hoisting the prefabricated wall body to a construction position, connecting the prefabricated wall body and the edge member, and pouring post-cast concrete;
and after the post-cast concrete reaches the preset strength, disassembling the fastening bolt and the template, and filling the slurry into the positioning connecting piece.
When the anti-seismic superposed wall is produced in a factory, firstly, the tie bars are used for connecting the upper-layer distributed reinforcing steel bars and the lower-layer distributed reinforcing steel bars to form a reinforcing cage; then, arranging a plurality of positioning connecting pieces penetrating through the reinforcing cage in the thickness direction of the reinforcing cage, and enabling flange plates at two ends of each positioning connecting piece to extend out of the reinforcing cage; then, pouring a precast concrete layer, and pre-burying a lower layer of positioning steel bars, a lower flange plate of the positioning connecting piece and lower end hooks of the tie bars in the precast concrete layer; and finally, arranging a template on the outer surface of the upper flange plate, and connecting the template with the positioning connecting piece by using a fastening bolt to penetrate through a through hole of the template so as to complete the connection of the prefabricated wall body.
After the prefabricated wall body is transported and hoisted to a construction position, post-cast concrete is poured in a cavity between the prefabricated concrete layer and the template; and after the post-cast concrete reaches the preset strength, removing the fastening bolt and the template, and filling the slurry into the threaded hole of the positioning connecting piece.
Compared with a double-sided superposed shear wall, the anti-seismic superposed wall provided by the invention has the advantages that the assembly of the precast concrete layer, the reinforcement cage and the template is completed in a factory by prefabricating, the fastening bolt and the template can be detached only after post-cast concrete poured on a construction site reaches certain strength, the construction is convenient, the construction process of an assembled building is greatly simplified, and the construction period is obviously shortened.
Meanwhile, the arrangement of the cavity and the template is favorable for reducing the quality of the prefabricated wall body, and compared with the traditional double-sided superposed wall shear wall, the difficulty in transportation and hoisting of the prefabricated wall body is effectively reduced, and the transportation and hoisting cost is saved.
In addition, because vertical reinforcing bars have wrapped up in prefabricated wallboard in traditional two-sided superimposed shear wall, vertical reinforcing bar can't direct contact connect when adjacent upper and lower two-layer wall body connects, and the thickness of template is less than 30mm usually, and vertical reinforcing bar in the steel reinforcement cage can adopt overlap joint connection when upper and lower two-layer prefabricated wall body connects, has realized being equal to cast-in-place structure's direct contact and has connected, and the biography power effect of reinforcing bar is better.
In addition, the invention also provides a construction method for the anti-seismic 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 a first embodiment of an earthquake-resistant laminated wall according to the present invention;
fig. 2 is a schematic structural view of a second embodiment of the earthquake-resistant laminated wall provided by the invention;
fig. 3 is a schematic structural view of a third embodiment of the earthquake-resistant laminated wall provided by the invention;
fig. 4 is a schematic structural view of a fourth embodiment of the earthquake-resistant laminated wall according to the present invention;
fig. 5 is a schematic structural view of a fifth embodiment of the earthquake-resistant laminated wall according to the present invention;
fig. 6 is a schematic structural view of a sixth embodiment of the earthquake-resistant laminated wall according to the present invention;
FIG. 7 is a schematic view showing the arrangement of the positioning connectors and tie bars in the earthquake-resistant laminated wall according to the present invention;
FIG. 8 is a schematic view of the positioning connection;
FIG. 9 is a schematic view of the assembly of the prefabricated wall body and the L-shaped edge member of the earthquake-resistant laminated wall according to the present invention;
FIG. 10 is a schematic structural view of the reinforcement cage of the L-shaped edge member of FIG. 9;
fig. 11 is an overall prefabricated view of the prefabricated wall body and the linear edge member of the earthquake-resistant laminated wall provided by the invention.
In fig. 1-11:
11 is the I-shaped base, 12 is fastening bolt, 13 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 member, 101 is vertical muscle, 102 is the stirrup, 103 is the horizontal connection reinforcing bar.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the invention is to provide the anti-seismic superposed wall, the prefabricated concrete layer, the reinforcement cage and the template are tied by utilizing the positioning connecting piece and the fastening bolt, the production process flow is greatly simplified, the construction is convenient and fast, and the construction period is obviously shortened.
In addition, the invention also provides a construction method for the anti-seismic superimposed wall.
Please refer to fig. 1-11.
The invention provides an anti-seismic superposed wall which comprises upper-layer distributed steel bars 2, lower-layer distributed steel bars 3, a precast concrete layer 6, a template 9 and a plurality of I-shaped positioning connecting pieces 11, wherein each positioning connecting piece 11 comprises a web member, an upper flange plate and a lower flange plate which are vertically connected to two ends of the web member, the upper flange plate is provided with a through hole, the web member is provided with a threaded hole for mounting a fastening bolt 12, the threaded hole and the through hole of the upper flange plate are coaxially arranged, and the length of the threaded hole is smaller than that of the web member;
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, and lower-end hooks of the lower-layer distributed steel bars 3, the lower flange plates and the tie bars 4 are all pre-embedded in a precast concrete layer 6;
the web member passes through the steel reinforcement cage so that the upper flange plate extends out of the steel reinforcement cage, the inner surface of the template 9 is tightly attached to the outer surface of the upper flange plate, and the fastening bolt 12 passes through the through hole of the template 9 to be connected with the web member so as to utilize the template 9 and the precast concrete layer 6 to enclose a cavity 7 for pouring post-cast concrete.
Referring to fig. 8, the positioning connector 11 includes a web member, and upper and lower flange plates perpendicular to both sides of the web member, the lower flange plate being embedded in the precast concrete layer 6; the web members are perpendicular to the inner surface of the precast concrete layer 6 and are in threaded connection with the fastening bolts 12 to compress the template 9 to be relatively parallel to the inner surface of the precast concrete layer 6; the through holes in the upper flange plate can be light holes or threaded holes.
Through the cooperation of screw hole and fastening bolt 12, the impact force of post-cast concrete to template 6 can directly transmit to the web member on, and the atress is then less in upper flange department. Therefore, in order to prevent the positioning connecting member 11 from being pulled apart, the tensile strength of the web member of the positioning connecting member 11 should be set to be greater than the maximum side pressure of the post-cast concrete to the form 9.
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; for the convenience of manufacturing the positioning connecting member 11, it is preferable that the shape and size of the upper flange plate be the same as those of the lower flange plate.
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 individual parts of the positioning connecting piece 11 are exposed outside the post-cast concrete, in order to reduce corrosion and prolong the service life of the positioning connecting piece, the positioning connecting piece 11 is mostly made of high-strength corrosion-resistant materials such as stainless steel, titanium alloy, high-strength plastic, hastelloy and the like.
When the positioning connector 11 is made of common steel, preferably, an anti-rust gasket for preventing the positioning connector 11 from being rusted is arranged outside the positioning connector 11, that is, the outer end surface of the upper flange plate and the outer end surface of the lower flange plate of the positioning connector 11, and the thickness of the anti-rust gasket is 5-40 mm.
The specific shape of the rust-proof gasket is not limited as long as it can cover the outer end faces of the upper and lower flange plates of the positioning connection member 11; the antirust gasket is mostly made of inorganic nonmetallic materials such as cement mortar and fiber composite materials, and has good corrosion resistance and lower manufacturing cost.
The fastening bolts 12 are mostly hexagon head bolts, and since the through holes for installing the fastening bolts 12 are arranged on the template 9, in order to prevent the later cast concrete from overflowing during pouring, the size of the bolt heads of the fastening bolts 12 should be larger than that of the through holes of the template 9.
When the fastening bolt 12 is small in size and the bolt head of the fastening bolt 12 is smaller in size than the through hole of the template 9, it is preferable that a backing plate 13 may be provided between the fastening bolt 12 and the template 9, the backing plate 13 is larger in size than the through hole of the template 9, and the backing plate 13 is provided with a through hole for mounting the fastening bolt 12.
The backing plate 13 is generally made of any material with certain bending strength such as steel, plastic and alloy, and the backing plate 13 can be set to be any geometric shape such as round, rectangular and the like; in order to save materials, the through hole of the backing plate 13 is mostly arranged in the center of the backing plate 13.
The specific types, materials, shapes and sizes of the positioning connecting piece 11, the fastening bolt 12 and the backing plate 13 are determined according to the design strength requirement of actual construction, and are not described in detail herein.
The upper flange plate and the lower flange plate can be connected to two ends of the web member in a welding mode, and can also be provided with threaded holes which are matched and connected with external threads at two ends of the web member so as to be conveniently in threaded connection with the web member, and the thickness of the flange plate is 3-20 mm; the positioning connecting piece 11 and the positioning connecting piece can be integrally produced in a batch mode through casting and the like.
Referring to fig. 7, the upper distributed rebars 2 and the lower distributed rebars 3 may be configured as a rebar grid formed by connecting a plurality of horizontal rebars and a plurality of vertical rebars, or configured as a formed rebar mesh; the upper distribution reinforcing steel bars 2 and the lower distribution reinforcing steel bars 3 are parallel to each other and connected through the tie bars 4 to form a reinforcing cage.
Referring to fig. 1 to 6, the upper end hook of the tie bar 4 is bound or welded to the upper-layer distributed steel bar 2, and the lower end hook of the tie bar 4 is bound or welded to the lower-layer distributed steel bar 3; the tie bars 4 are distributed in a plum blossom shape as shown in fig. 7.
Of course, it is also possible to replace part or all of the tie bars 4 with truss rebars 5, as shown in fig. 2, 4 and 6. 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 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 tie bars 4 and the truss reinforcing steel bars 5 can be uniformly arranged along the length direction of the prefabricated combined type anti-seismic superposed wall, and the distance between every two adjacent truss reinforcing steel bars 5 can be set to be 200-800 mm.
The concrete material, size, number, setting position, connection mode and other actual production requirements of the tie bars 4 and the truss steel bars 5 are determined, and are not described in detail herein.
In order to prevent the reinforcement cage from displacing relative to the precast concrete layer 6 and the formwork 9 during transportation and hoisting, the web members of the i-shaped base 11 are usually connected with the reinforcement cage. Preferably, the web members which can be used for positioning the connecting piece 11 are positioned at the steel bar intersection of the steel bar cage, and the web members are bound or welded with the steel bar cage.
The tie point of horizontal reinforcing bar and perpendicular reinforcing bar in the steel reinforcement cage is the reinforcing bar intersection point, connects the web member in reinforcing bar intersection point department, can all be connected the web member of I shape base 11 with horizontal reinforcing bar, perpendicular reinforcing bar, compares in only being connected with horizontal reinforcing bar/vertical steel bar, connects more stably.
Precast concrete layer 6 is prefabricated the shaping in the mill, lower floor's distribution reinforcement 3, the lower flange board of I shape base 11 and the lower extreme crotch of drawknot muscle 4 are all pre-buried in precast concrete layer 6, the thickness of precast concrete layer 6 and the pre-buried degree of depth of each component are confirmed according to the designing requirement of actual construction, the thickness of precast concrete layer 6 is more than or equal to 50mm usually, and the distance of precast concrete layer 6's internal surface to upper distribution reinforcement 2 is more than or equal to 80mm to guarantee the structural strength of antidetonation coincide wall.
In order to facilitate the bonding between the precast concrete layer 6 and the post-cast concrete, the inner surface of the precast concrete layer 6 is generally provided with galling and/or a concave-convex groove having a concave-convex depth of greater than or equal to 3mm with respect to the inner surface of the precast concrete layer 6.
The inner surface of the template 9 is closely attached to the outer surface of the upper flange plate of the positioning connecting piece 11 so as to be matched with the precast concrete layer 6 to jointly enclose a cavity 7 for pouring post-cast concrete.
Preferably, the form 9 includes a wood form, a steel form, a plastic form, an aluminum alloy form, a PVC skinning foam board, and a fiber reinforced composite board.
The concrete type of the template 9 is determined by referring to the prior art according to actual construction needs, the strength and the rigidity of the template should meet the requirement of post-cast concrete pouring, and the mass of the template should be smaller than that of the precast concrete layer 6; 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.
When pipelines need to be laid or doors and windows need to be opened in the prefabricated earthquake-resistant superposed wall, corresponding pipeline openings or door and window openings need to be reserved on the prefabricated concrete layer 6 and/or the template 9 so as to place corresponding opening molds.
The post-cast concrete is cast in the cavity 7 between the precast concrete layer 6 and the template 9 in situ, the type of the post-cast concrete is related to the horizontal width of the cavity 7, and when the horizontal width of the cavity 7 is more than or equal to 200mm, common concrete can be cast in the cavity 7;
on the contrary, when the horizontal width of the cavity 7 is less than 200mm, self-compacting concrete or fine aggregate concrete needs to be poured into the cavity 7 to make up for the problem of wall strength caused by insufficient thickness of post-poured concrete layer.
When the prefabricated steel bar cage is produced in a factory, firstly, the tie bars 4 are used for connecting the upper-layer distributed steel bars 2 and the lower-layer distributed steel bars 3 to form the steel bar cage; then, arranging a plurality of positioning connecting pieces 11 penetrating through the reinforcing cage in the thickness direction of the reinforcing cage, and enabling flange plates at two ends of each positioning connecting piece 11 to extend out of the reinforcing cage; then, pouring a precast concrete layer 6, and pre-burying the lower positioning steel bars 3, the lower flange plates of the positioning connecting pieces 11 and the lower hooks of the tie bars 4 in the precast concrete layer 6; and finally, arranging a template on the outer surface of the upper flange plate, and connecting the template with a positioning connecting piece 11 by using a fastening bolt 12 to penetrate through a through hole of the template 9 to complete the connection of the prefabricated wall plate.
After the prefabricated wall body is transported and hoisted to a construction position, post-cast concrete is poured in a cavity 7 between a prefabricated concrete layer 6 and a template 9; and after the post-cast concrete reaches the preset strength, removing the fastening bolt 12 and the template 9, and filling slurry into the through hole and the threaded hole of the positioning connecting piece 11.
In this embodiment, the equipment of prefabricated concrete layer 6, steel reinforcement cage and template 9 is accomplished in the prefabrication of antidetonation coincide wall in the mill, only needs can dismantle fastening bolt 12 and template 9 after the post-cast concrete that pours at the job site reaches certain intensity, compares in two-sided superimposed shear wall, and it is convenient to construct, has greatly simplified the construction flow of assembled building, is showing and has shortened construction period.
Meanwhile, the cavity 7 and the template 9 are arranged to be beneficial to reducing the quality of the prefabricated wall body, compared with the traditional double-faced superposed wall shear wall, the difficulty of transportation and hoisting of the prefabricated wall body is effectively reduced, and the transportation and hoisting cost is saved.
In addition, because vertical reinforcing bars have wrapped up in prefabricated wallboard in traditional two-sided superimposed shear wall, vertical reinforcing bar can't the direct contact connection when adjacent upper and lower two-layer wall body is connected, and the thickness of template 9 is less than 30mm usually, and the vertical reinforcing bar in the steel reinforcement cage can adopt the overlap joint connection when upper and lower two-layer prefabricated wall body is connected, has realized being equal to the direct contact connection of cast-in-place structure, and the biography power effect of reinforcing bar is better.
On the basis of the above embodiment, please refer to fig. 5 and 6, the anti-seismic superimposed wall further includes a heat insulation layer 8, the heat insulation layer 8 is disposed between the formwork 9 and the upper-layer distributed steel bars 2, and gaps exist between the heat insulation layer 8 and the inner surface of the formwork 9 and between the heat insulation layer and the outer surface of the upper-layer distributed steel bars 2.
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 between the heat preservation layer 8 and the inner surface of the template 9 and the distance between the heat preservation layer 8 and the outer surface of the upper-layer distribution steel bar 2 are determined according to actual construction needs and are not described again.
In the embodiment, a certain gap is reserved between the heat-insulating layer 8 and the template 9 as well as between the upper-layer distributed steel bars 2, which is beneficial to completely wrapping the upper-layer distributed steel bars 2 in 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 is protected by post-cast concrete with a certain thickness, so that the functions of corrosion resistance and fire resistance can be achieved.
In addition to the anti-seismic laminated wall, the invention also provides a construction method of the anti-seismic laminated wall disclosed by the embodiment, and the construction method comprises the following steps:
step S1, connecting the upper-layer distributed steel bars 2 and the lower-layer distributed steel bars 3 by using tie bars 4 to form a steel bar cage;
step S2, arranging a plurality of positioning connecting pieces 11 in the reinforcement cage, and enabling upper and lower flange plates of the positioning connecting pieces 11 to extend out of the reinforcement cage;
step S3, pouring a precast concrete layer 6, and embedding the lower end hooks of the tie bars 4, the lower-layer distributed steel bars 3 and the lower flange plate in the precast concrete layer 6;
step S4, placing the template 9 outside the upper flange plate, and connecting the template 9 and the upper flange plate by using the fastening bolts 12 to finish the assembly of the prefabricated wall body;
step S5, transporting and hoisting the prefabricated wall to a construction position, connecting the prefabricated wall and the edge member, and pouring post-cast concrete;
and step S6, after the post-cast concrete reaches the preset strength, detaching the fastening bolts 12 and the templates 9, and filling the positioning connecting pieces 11 with grout.
It should be noted that in step S5, the edge member 10 includes a straight edge member, an L-shaped edge member, a T-shaped edge member, a cross-shaped edge member, etc., and the connection manner between the edge member 10 and the prefabricated wall is affected by the type of the edge member 10 and the manner of binding the reinforcement cage of the edge member 10.
When the edge member 10 is a straight edge member and the longitudinal bars 101 of the edge member 10 are connected by binding, the reinforcement cage of the edge member 10 and the prefabricated wall body can be prefabricated and formed together in a factory, and then transported and hoisted to a construction position as shown in fig. 11.
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 reinforcement cage of the edge member 10 is independently manufactured relative to the prefabricated wall body, and the reinforcement cage and the prefabricated wall body are respectively transported and hoisted to a construction position after being prefabricated in a factory or the reinforcement cage of the edge member 10 is manufactured on site; in order to improve the hoisting fault-tolerant rate of the prefabricated wall, a certain gap can be formed between the edge member 10 and the prefabricated wall; after the fabrication of the reinforcement cage of the edge member 10 and the hoisting of the prefabricated wall are completed, a plurality of horizontal connecting reinforcements 103 are uniformly arranged between the edge member 10 and the prefabricated wall, as shown in fig. 9.
Referring to fig. 10, the reinforcement cage of the edge member 10 includes longitudinal bars 101, stirrups 102 for resisting shearing force, and tie bars 4.
It should be noted that in step S6, the flange plate of the positioning connection member 11 is provided with a through hole, the web member is provided with a threaded hole, and the filling slurry is mainly used to fill the through hole and the threaded hole exposed after the fastening bolt 12 is removed.
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 earthquake-proof overlapped wall and the construction method thereof provided by the invention are described in detail above. The principles and embodiments of the present invention have been described herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (8)

1. An anti-seismic superposed wall is characterized by comprising upper-layer distributed reinforcing steel bars, lower-layer distributed reinforcing steel bars, a precast concrete layer, a template and a plurality of I-shaped positioning connecting pieces, wherein each positioning connecting piece comprises a web member and upper and lower flange plates vertically connected to two ends of the web member, the upper flange plate is provided with a through hole, the web member is provided with a threaded hole for mounting a fastening bolt, the threaded hole is coaxially arranged with the through hole of the upper flange plate, and the length of the threaded hole is smaller than that of the web member;
the upper-layer distributed steel bars and the lower-layer distributed steel bars are connected through tie bars to form a steel bar cage, and the lower-layer distributed steel bars, the lower flange plates and lower hooks of the tie bars are all pre-embedded in the precast concrete layer;
the web member passes the steel reinforcement cage so that the upper flange plate stretches out outside the steel reinforcement cage, the internal surface of template with the surface of upper flange plate closely laminates, fastening bolt passes the through-hole of template with the web member is connected, in order to utilize the template with precast concrete layer encloses into the cavity that is used for pouring post-cast concrete.
2. An earthquake-resistant laminated wall according to claim 1, wherein the shape and dimensions of said upper flange plate are the same as the shape and dimensions of said lower flange plate.
3. An earthquake-resistant superimposed wall according to claim 1, characterized in that a backing plate is provided between the fastening bolt and the formwork, the size of the backing plate is larger than the size of the through hole of the formwork, and the backing plate is provided with a through hole for mounting the fastening bolt.
4. An earthquake-resistant superimposed wall according to claim 1, wherein an antirust gasket for preventing the positioning connecting piece from being rusted is arranged outside the positioning connecting piece, and the thickness of the antirust gasket is 5-40 mm.
5. An earthquake-resistant superimposed wall according to any one of claims 1-4, wherein the web members are arranged at the steel bar intersection of the steel reinforcement cage, and the web members are bound or welded with the steel reinforcement cage.
6. An earthquake-resistant laminated wall according to any one of claims 1 to 4, wherein the formwork comprises a wood formwork, a steel formwork, a plastic formwork, an aluminum alloy formwork, a PVC skinned foam board and a fiber reinforced composite board.
7. An earthquake-resistant superimposed wall according to any one of claims 1 to 4, further comprising an insulating layer, wherein the insulating layer is arranged between the formwork and the upper-layer distributed steel bars, and gaps are formed between the insulating layer and the inner surface of the formwork and between the insulating layer and the outer surface of the upper-layer distributed steel bars.
8. A construction method for an earthquake-resistant superimposed 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;
arranging a plurality of positioning connecting pieces in the reinforcement cage, and enabling upper flange plates and lower flange plates of the positioning connecting pieces to extend out of the reinforcement cage;
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, wherein the thickness of the precast concrete layer is more than or equal to 50 mm;
placing a template outside the upper flange plate, and connecting the template and the upper flange plate by using a fastening bolt to finish the assembly of the prefabricated wall body;
transporting and hoisting the prefabricated wall body to a construction position, connecting the prefabricated wall body and the edge member, and pouring post-cast concrete;
and after the post-cast concrete reaches the preset strength, disassembling the fastening bolt and the template, and filling the slurry into the positioning connecting piece.
CN202210766897.3A 2022-07-01 2022-07-01 Anti-seismic superposed wall and construction method thereof Pending CN115095053A (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117403807A (en) * 2023-10-27 2024-01-16 海南大学 Light, easily prefabricated and convenient coincide wall of site operation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117403807A (en) * 2023-10-27 2024-01-16 海南大学 Light, easily prefabricated and convenient coincide wall of site operation
CN117403807B (en) * 2023-10-27 2024-04-26 海南大学 Light, easily prefabricated and convenient coincide wall of site operation

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