CN110978211A - Sandwich heat-insulation superposed shear wall prefabricated part and manufacturing method thereof - Google Patents
Sandwich heat-insulation superposed shear wall prefabricated part and manufacturing method thereof Download PDFInfo
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- CN110978211A CN110978211A CN201911313675.0A CN201911313675A CN110978211A CN 110978211 A CN110978211 A CN 110978211A CN 201911313675 A CN201911313675 A CN 201911313675A CN 110978211 A CN110978211 A CN 110978211A
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- 238000009413 insulation Methods 0.000 title claims abstract description 75
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000004567 concrete Substances 0.000 claims abstract description 160
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 63
- 239000010959 steel Substances 0.000 claims abstract description 63
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 23
- 238000004321 preservation Methods 0.000 claims abstract description 9
- 230000002787 reinforcement Effects 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 10
- 229910052755 nonmetal Inorganic materials 0.000 claims description 8
- 238000010008 shearing Methods 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 5
- 229910000746 Structural steel Inorganic materials 0.000 claims description 4
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 11
- 238000010276 construction Methods 0.000 description 8
- 239000007769 metal material Substances 0.000 description 4
- 239000011178 precast concrete Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229920002748 Basalt fiber Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/04—Producing shaped prefabricated articles from the material by tamping or ramming
- B28B1/045—Producing shaped prefabricated articles from the material by tamping or ramming combined with vibrating or jolting
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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
- 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
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
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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
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
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Abstract
The invention discloses a sandwich heat-insulation superposed shear wall prefabricated part and a manufacturing method thereof. The preparation method comprises the following steps: binding a steel bar mesh of the outer leaf concrete wallboard, and installing a connecting piece system on the steel bar mesh; pouring outer leaf wallboard concrete, laying a heat insulation board, and installing a reinforcing mesh in the cavity; binding and installing a steel bar mesh of the inner leaf concrete wallboard, pouring concrete, keeping the inner leaf concrete wallboard still, and turning the rest parts for 180 degrees integrally; and moving the overturned part to the inner leaf concrete wallboard to press all the end parts of the connecting pieces into the inner leaf concrete wallboard and make full contact with the inner leaf concrete wallboard. The connecting piece system has clear stress of all parts, and realizes the non-combined stress mode of the sandwich heat-preservation superposed shear wall.
Description
Technical Field
The invention relates to the technical field of sandwich heat-insulating shear walls, in particular to a sandwich heat-insulating superposed shear wall which is composed of an outer leaf concrete wallboard, a heat-insulating layer, a cavity and an inner leaf concrete wallboard and adopts an independent truss connecting piece, and a manufacturing method thereof.
Background
At present, in an assembly type shear wall structure system in China, two layers of concrete wallboards are connected to form a superposed shear wall component with a cavity, the superposed shear wall component is more and more applied and is transported to a construction site to be installed in place, and after cavity concrete is poured, adjacent components are connected to form the superposed shear wall. The sandwich heat-insulation superposed shear wall is a novel assembled building outer wall formed by combining a superposed shear wall and a sandwich heat-insulation structure, and consists of an outer leaf concrete wallboard, a heat-insulation layer, a cavity and an inner leaf concrete wallboard, wherein the inner leaf concrete wallboard and the outer leaf concrete wallboard are connected through a connecting piece system penetrating through the heat-insulation layer and the cavity.
In traditional sandwich heat preservation superimposed shear wall, the connecting piece system mainly has two kinds of forms, generally all exclusive use:
the first type is a nonmetal (such as fiber reinforced composite plastic) rod-shaped connecting piece which is generally arranged along the wall thickness direction according to the length, is dispersedly arranged in the plane range of a wall body and can bear tensile force, pressure and shear force at the same time, but because the total thickness of a cavity and a heat insulation layer is larger, the connecting piece rod piece has larger section area and larger rigidity in order to meet the stress requirement, so that when the sandwich heat insulation superposed shear wall is used as a building outer wall, under the temperature action or the contraction action in the use stage, the outer leaf concrete wall plate is strongly restrained by the inner leaf concrete wall plate, the inner leaf concrete wall plate and the outer leaf concrete wall plate tend to be subjected to combined stress, the outer leaf concrete wall plate can be seriously cracked or warped and deformed, and the use function and the durability of the outer wall are influenced.
The second type is a metal (such as stainless steel) truss connecting piece, the truss connecting piece is a continuous truss, the length of the truss connecting piece is generally equal to the height and the width of a wall body, a plurality of truss connecting pieces are generally vertically arranged, two truss connecting pieces are transversely arranged, and the continuous truss connecting piece is formed by welding two chord member reinforcing steel bars and continuously bent web member reinforcing steel bars and can bear tensile force, pressure and shearing force at the same time. When the cavity concrete is poured, the stress of the bottom connecting piece member bar plays a role in controlling, so the reasonable space of the connecting piece web members is the space between the bottom of the wall body and the top of the wall body, but the connecting piece is inconvenient to manufacture and is still manufactured at equal space for convenience of manufacture; simultaneously, for satisfying the atress requirement, the connecting piece web member diameter is generally great, synthesizes to lead to: 1) the overall rigidity of the connecting piece is high, so that the external leaf concrete wallboard is restrained strongly, and the external leaf concrete wallboard cannot deform freely and further cracks or deforms; 2) the material consumption of the connecting piece is large, and the strength of the material is not fully exerted; 3) the connecting piece web members need to penetrate through the heat insulation layer, and the heat conductivity coefficient of the material is large, so that the thermal performance of the wall body is greatly influenced, and the energy-saving effect is poor.
In summary, in order to fully exert the advantages of simple structure and convenient construction of the sandwich heat-insulation superposed shear wall, it is necessary to provide a sandwich heat-insulation superposed shear wall member adopting a novel connecting piece system, so that the problems of unreasonable stress mode, material waste and poor energy-saving effect of the traditional structure are solved, and the safety and the quality of the external wall of the fabricated building are ensured.
Disclosure of Invention
The invention aims to provide a novel sandwich heat-insulation superposed shear wall prefabricated part, which solves the problems of undefined stress and unclear design calculation of the traditional connecting piece by adopting a connecting piece system formed by an independent truss connecting piece and a rod-shaped connecting piece, further avoids the problem that the wall is strongly restrained by the connecting piece to generate a combination effect, further causes the cracking and deformation of an outer leaf concrete wall panel, and ensures that the sandwich heat-insulation superposed shear wall has a more reasonable structure and the stress mode is more in line with the design expectation.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a sandwich heat-insulation superposed shear wall prefabricated part which comprises an outer leaf concrete wallboard, a heat-insulation layer, a cavity, an inner leaf concrete wallboard and a connecting piece system, wherein the outer leaf concrete wallboard, the heat-insulation layer, the cavity and the inner leaf concrete wallboard are sequentially arranged in the thickness direction of a shear wall; the concrete wall is characterized in that the connecting piece system penetrates through the cavity and the heat insulation layer to extend into the inner leaf concrete wall plate and the outer leaf concrete wall plate and comprises at least four independent truss connecting pieces and a plurality of rod-shaped connecting pieces with the lengths arranged along the thickness direction of the shear wall;
the rod-shaped connecting pieces are metal or nonmetal anti-pull rod pieces and are dispersedly arranged in the plane range of the wall body, the distance between every two adjacent rod-shaped connecting pieces is 200-600 mm, and the distance between the rod-shaped connecting pieces positioned at the bottom of the wall body is smaller than that between the other areas;
the independent truss connecting pieces have the same structure and are used for bearing pressure, shearing force, partial tension and resisting torsion and are respectively formed by welding two inner chord steel bars positioned on the inner leaf concrete wall board, two outer chord steel bars positioned on the outer leaf concrete wall board, four diagonal web members penetrating through the cavity and the heat insulation layer and four transverse steel bars; the first diagonal web member, the second diagonal web member, the third diagonal web member and the fourth diagonal web member are arranged in a splayed shape to form two pairs of diagonal web members, two ends of the first pair of diagonal web members are respectively welded with the first outer chord member steel bar and the first inner chord member steel bar, two ends of the second pair of diagonal web members are respectively welded with the second outer chord member steel bar and the second inner chord member steel bar, and the two pairs of diagonal web members are connected through four transverse steel bars; the concrete specification and the distance of each independent truss connecting piece are determined according to the compression and shearing calculation of the connecting pieces, meanwhile, the intersection point of the central connecting line of two vertically arranged independent truss connecting pieces and the central connecting lines of two horizontally arranged independent truss connecting pieces is close to the centroid position of the sandwich heat-insulation superposed shear wall as much as possible, and the minimum distance between the center of each independent truss connecting piece and the concrete edge of the prefabricated member of the sandwich heat-insulation superposed shear wall is 300 mm.
Furthermore, the independent truss connecting piece is respectively sleeved with a first constraint sleeve in the range of the heat-insulating layer on each inclined web member, and a gap for providing a compression deformation space for the inclined web members exists between the end part of each first constraint sleeve and the edges of the two sides of the heat-insulating layer; or a second constraint sleeve is respectively sleeved on each diagonal web member within the range of the heat-insulating layer and the cavity, and a gap for providing a compression deformation space for the diagonal web members exists between the end part of each second constraint sleeve and the outer edge of the heat-insulating layer as well as the outer edge of the inner leaf concrete wall plate; the first constraint sleeve and the second constraint sleeve are both hard nonmetal tube bodies, the cross sections of the first constraint sleeve and the second constraint sleeve are circular, and the cross section of each constraint sleeve is slightly larger than that of the inner diagonal web member so as to facilitate the penetration of each constraint sleeve and ensure that a proper deformation space is provided for the inner diagonal web member.
Further, this sandwich heat preservation superimposed shear wall prefabricated component still including being located the structure reinforcing bar net piece in the cavity and along the many interface reinforcing bars of vertical setting, each interface reinforcing bar all passes perpendicularly the interface between cavity and the interior leaf concrete wallboard to form pre-buried steel bar skeleton with the structure reinforcing bar net piece in the cavity and the reinforcing bar net piece in the interior leaf concrete wallboard respectively.
The invention also provides a manufacturing method of the sandwich heat-insulation superposed shear wall prefabricated part, which comprises the following steps:
s1: binding the steel bar meshes in the outer leaf concrete wall plate; installing and fixing a connector system consisting of independent truss connectors and rod-shaped connectors on the reinforcing mesh;
s2: pouring outer leaf wallboard concrete; then laying a heat insulation plate serving as the heat insulation layer, wherein the heat insulation plate is provided with a pre-drilled hole and a notch, and the drilled hole is used for penetrating through each rod-shaped connecting piece; the notches are used for penetrating through the independent truss connecting pieces, and after the heat insulation boards are installed in place, all the notches are filled with heat insulation materials; then installing the reinforcing mesh in the cavity, and fixing the reinforcing mesh in the connecting piece system;
s3: binding and installing steel bar meshes in the inner leaf concrete wall board, and then pouring concrete; and then the integrally-turned outer leaf concrete wall board, the heat-insulating board, the connecting piece system and the reinforcing mesh in the cavity which are poured and have the concrete strength meeting the requirements are turned over for 180 degrees, so that one side of the heat-insulating board and the connecting piece system is integrally turned downwards, and the outer leaf concrete wall board is turned upwards.
S4: the whole steel mesh in the outer leaf concrete wallboard, the insulation board, the connecting piece system and the cavity after overturning moves towards the inner leaf concrete wallboard, so that the end parts of all the connecting pieces are pressed into the inner leaf concrete wallboard, then the concrete of the inner leaf concrete wallboard is vibrated, the parts of all the connecting pieces extending into the concrete are fully contacted with the concrete, and after the concrete strength meets the requirement, the member is manufactured.
Further, the process of mounting and fixing the rod-shaped connectors on the mesh reinforcement in step S1 is performed after the insulation board is laid in step S2.
Further, the steel mesh in the inner leaf concrete wall panel in the step S3 is replaced by an embedded steel bar skeleton, and the embedded steel bar skeleton is formed by respectively welding a plurality of interface steel bars which vertically penetrate through the interface between the cavity and the inner leaf concrete wall panel and are vertically arranged with the steel mesh in the inner leaf concrete wall panel and the structural steel mesh in the cavity.
The invention has the following advantages:
(1) the stress of each part in the connecting piece system is definite, and the problems of indefinite stress and unclear design calculation of the traditional connecting piece system are solved.
(2) The overall rigidity of the connecting piece is effectively reduced, the constraint on the outer leaf wall board is small, and the outer leaf wall board can deform freely under the action of temperature and shrinkage, so that the overall sandwich heat-insulation outer wall is in a non-combined stress mode, and the problems of cracking and deformation of the outer leaf wall caused by strong constraint and combination effects are solved.
(3) The connecting piece system is reasonable in stress, various connecting pieces play their own roles, the bearing capacity and the material strength of the connecting pieces are fully exerted, the material consumption can be saved, and the manufacturing cost of the components is reduced.
(4) Compared with a sandwich heat-insulation superposed shear wall adopting continuous truss connecting pieces, the cross-sectional area of the connecting pieces penetrating through the heat-insulation layer is reduced, the adverse effect of the connecting pieces on the thermal performance of the wall body is reduced, and the energy-saving effect is effectively improved.
The invention provides a novel sandwich heat-insulation superposed shear wall member, which can solve the problems of unreasonable stress mode, material waste, poor energy-saving effect and the like of the traditional structure on the whole, can further give full play to the advantages of simple structure and convenient construction of the sandwich heat-insulation superposed shear wall, and ensures the safety and the quality of the outer wall of the assembled building.
Drawings
Fig. 1 is a three-dimensional view of a sandwich insulation composite shear wall prefabricated part according to an embodiment of the invention.
Fig. 2 is a front view of the prefabricated sandwich insulation composite shear wall member shown in fig. 1.
Fig. 3 is a cross-sectional view of fig. 2 taken along line 1-1 (without the interface bars).
Fig. 4 is a cross-sectional view 2-2 (without interface bars) of fig. 2.
Fig. 5 is a three-dimensional view of the individual truss attachment members shown in fig. 1.
Fig. 6 (a) and (b) are sectional views of independent truss connection members provided with different constraining sleeves, respectively.
Fig. 7 (a), (b) are respectively a cross-sectional view 1-1 (including the interface steel bars) and a cross-sectional view 2-2 (including the interface steel bars) of fig. 2, showing the connector system.
Fig. 8 is a front view of a sandwich insulation composite shear wall prefabricated part containing a window hole according to embodiment 2 of the invention.
FIG. 9 is a flow chart of a method for manufacturing a sandwich insulation composite shear wall prefabricated part according to the present invention.
Detailed Description
In order to facilitate understanding of the technical solution of the present invention, the following is further explained with reference to the accompanying drawings:
referring to fig. 1 to 4 (it should be noted that, in order to more clearly reflect the arrangement of the connector system, the reinforcing mesh in the inner leaf concrete wall panel and the outer leaf concrete wall panel are not illustrated in fig. 1), the sandwich insulation laminated shear wall prefabricated component provided by the invention comprises an outer leaf concrete wall panel 3, an insulation layer 4, a cavity 5 and an inner leaf concrete wall panel 6 which are sequentially arranged along the thickness direction of the shear wall, and a connector system for connecting the inner leaf concrete wall panel and the outer leaf concrete wall panel, wherein the connector system penetrates through the cavity 5 and the insulation layer 4 and extends into the inner leaf concrete wall panel and the outer leaf concrete wall panel, and the connector system comprises at least four independent truss connectors (110, 120, 130, 140) and a plurality of rod-shaped connectors 200 with lengths arranged along the thickness direction of the shear wall.
The prefabricated member containing the outer leaf concrete wall panel 3, the heat insulation layer 4, the inner leaf concrete wall panel 6 and the connecting piece system is installed in place on a construction site, and after concrete is poured in a cavity 5 of the heat insulation layer 4 and the inner leaf concrete wall panel 6, a sandwich heat insulation superposed shear wall is formed, wherein the inner leaf concrete wall panel 6 and the concrete in the cavity 5 jointly form a bearing wall (namely a shear wall), and the outer leaf concrete wall panel 3 is a non-bearing member supported on the bearing wall.
In the connector system of the present invention, the rod-shaped connector 200 is made of a metal or non-metal material. When a metal material is adopted, a material (such as a stainless steel wire) with a lower heat conductivity coefficient than that of common carbon steel is preferably adopted, the section form of the material is generally circular, each rod-shaped connecting piece can be designed into a single rod type or a U shape according to requirements, and hooks or wave-shaped sections can be arranged on the parts, anchored into the inner concrete wallboard and the outer concrete wallboard, of the rod-shaped connecting pieces 200 so as to enhance the bonding and anchoring performance of the rod-shaped connecting pieces 200 and concrete. When non-metal materials (such as glass fiber reinforced plastics, carbon fiber reinforced plastics, basalt fiber reinforced plastics and the like) are adopted, the cross section can be in various forms such as a circle, an ellipse, a polygon, a star shape, a rectangle and the like, the cross section is generally designed into a single rod type, and the part of the rod-shaped connecting piece 200 anchored into the inner concrete wallboard and the outer concrete wallboard can be provided with an enlarged head or a groove so as to enhance the bonding and anchoring performance of the rod-shaped connecting piece 200 and concrete. The rod-shaped connecting piece and the independent truss connecting piece are respectively bound with the nearby reinforcing steel bars so as to keep stability. The rod-shaped connecting member 200 of the present invention mainly bears the tensile force generated by the load such as the concrete side pressure when the cavity concrete is poured and the tensile force generated by the outer lobe concrete wall panel under the load action such as the wind load, the temperature action, the earthquake action, etc. in the use stage. The rod-shaped connectors 200 are arranged in a manner that the lengths thereof are along the thickness direction of the wall, and are dispersedly arranged in the plane range of the wall. The cross-sectional dimension and the spacing of the rod-shaped connecting pieces are determined according to the tension calculation of the connecting pieces, the spacing is 200mm at the minimum and 600mm at the maximum, generally speaking, under the condition that all the rod-shaped connecting pieces adopt the same cross-sectional dimension, the spacing at the bottom is controlled by the working condition of pouring concrete in a cavity, the connecting pieces are densely arranged, the upper part is mainly controlled by the tension calculation under the load action in the use stage, and the arrangement spacing is relatively larger.
The connecting member system of the present invention includes at least two independent truss connecting members (e.g., two independent truss connecting members 130 and 140 horizontally disposed and two independent truss connecting members 110 and 120 vertically disposed as shown in fig. 1) respectively disposed along the horizontal direction and the vertical direction of the shear wall. The individual truss attachment members are identical in structure, and a single vertically disposed truss attachment member 110 will now be described by way of example. Referring to fig. 5, the independent truss connection member 110 is formed by fixedly connecting inner chord reinforcements 113 and 114 located on the inner leaf concrete wall panel 6, two outer chord reinforcements 111 and 112 located on the outer leaf concrete wall panel 3, four diagonal web members 121-124 penetrating through the cavity 5 and the heat insulation layer 4, and four transverse reinforcements 131-134. The sizes of the four diagonal web members 121-124 are the same, the diagonal web members 121 and 122 are arranged in a splayed shape, two ends of each diagonal web member 121 and 122 are respectively welded with the outer chord 111 and the inner chord 112, and the end parts of the diagonal web members 121 and 122 are close to each other and positioned on the side of the outer chord 111; the diagonal web members 123 and 124 are arranged in a splayed shape, two ends of the diagonal web members 123 and 124 are respectively welded with the outer chord member 113 and the inner chord member 114, and the closed end parts of the diagonal web members 123 and 124 are positioned on the side of the outer chord member 113. The transverse steel bar is located oblique web member tip, and with two web member welded connection that correspond, specifically, transverse steel bar 131 both ends are located the one end welding of outer leaf concrete wall panel 3 with oblique web member 121 and 123 respectively, transverse steel bar 132 both ends are located the one end welding of inner leaf concrete wall panel 6 with oblique web member 121 and 123 respectively, transverse steel bar 133 both ends are located the one end welding of outer leaf concrete wall panel 3 with oblique web member 122 and 124 respectively, transverse steel bar 134 both ends are located the one end welding of inner leaf concrete wall panel 6 with oblique web member 122 and 124 respectively. The transverse reinforcing steel bars play a role in assembly and connection on one hand and can enhance the tensile anchoring performance of the diagonal web members on the other hand. The horizontally arranged independent truss connecting pieces (130, 140) can be regarded as being obtained by rotating the vertically arranged independent truss connecting pieces by 90 degrees along the shear wall surface.
The independent truss connecting piece mainly bears the shearing force and the pressure transmitted to the connecting piece by the outer leaf concrete wallboard due to the effects of self weight, wind load, earthquake and the like in the hoisting and using stages of the prefabricated components of the shear wall, and shares part of the pulling force. The independent truss connecting pieces vertically arranged in the plane range of the sandwich heat-preservation superposed shear wall mainly bear shear forces under the actions of self weight, vertical earthquake and the like, the independent truss connecting pieces horizontally arranged mainly bear shear forces under the action of horizontal earthquake, and the independent truss connecting pieces and the shear forces are matched to resist the torsion effect existing in the hoisting and using stages.
The chords of the independent truss connecting piece are parallel to each other, the chords can adopt hot-rolled or cold-rolled ribbed steel bars, the diameter and the length are determined according to the requirements of tension anchoring of the inclined web members and the distance between the inclined web members, the diameter is not less than 6mm, the distance between the chords in the concrete wall boards on the same side is generally 40-200 mm, and the method can be specifically determined according to the manufacturing process and the integrity requirements of the connecting piece. The diagonal web members of the independent truss connecting members are preferably made of metal materials (such as stainless steel) with lower heat conductivity coefficient than common carbon steel, and the cross section size of the diagonal web members is determined according to the compression and shearing calculation of the connecting members.
The concrete specification and the distance of each independent truss connecting piece are mainly determined and avoided according to the compression and shearing calculation of the connecting pieces, meanwhile, the intersection point of the position center connecting lines of two vertical independent truss connecting pieces and the position center connecting lines of two horizontal independent truss connecting pieces is close to the centroid position of the sandwich heat-preservation superposed shear wall as much as possible, and the minimum distance between the center of each independent truss connecting piece and the edge of the precast concrete of the sandwich heat-preservation superposed shear wall is 300 mm.
Furthermore, in order to prevent buckling instability of each independent truss connecting piece caused by compression in the production, transportation, hoisting and use stages, buckling prevention measures are taken for the diagonal web members of the independent truss connecting pieces. Specifically, when the independent truss connecting member diagonal web members have a buckling risk under pressure only in the stage of using the sandwich heat-insulating laminated shear wall, a first constraint sleeve ( only constraint sleeves 141 and 142 sleeved on the diagonal web members 131 and 132 are shown in the figure) can be respectively sleeved on each diagonal web member within the range of the heat-insulating layer 4 to prevent the diagonal web members from buckling under pressure, see (a) in fig. 6, each first constraint sleeve is a hard non-metal pipe body, the cross section of the first constraint sleeve is circular, and the cross section of the first constraint sleeve is slightly larger than that of the inner diagonal web member, so that the first constraint sleeve is conveniently penetrated and a proper deformation space is ensured to be provided for the inner web member; the length of each first restraint sleeve is determined by the size of the inner web member in the range of the heat insulation layer, and a gap for providing a compression deformation space for the inclined web member is ensured between the end part of each first restraint sleeve and the edge 41 of the heat insulation layer. When the buckling risk under compression exists in the production, transportation, hoisting and use stages, a second constraint sleeve (only the constraint sleeves 0141 and 0142 sleeved on the diagonal web members 131 and 132 are illustrated in the figure) can be sleeved on each diagonal web member within the range of the insulating layer 4 and the cavity 5 respectively (see (b) in fig. 6), the rest of each second constraint sleeve except the length is the same as that of the first constraint sleeve, and a gap for providing a compression deformation space for the diagonal web member exists between the end part of each second constraint sleeve and the outer edge 42 of the insulating layer and between the end part of each second constraint sleeve and the outer edge 62 of the inner leaf concrete wall panel (the reference mark "63" in fig. 6 indicates the inner edge of the inner leaf concrete wall panel).
The stressed steel bars in the bearing wall formed by the inner leaf concrete wall boards 6 and the post-cast concrete in the cavity 5 are double-layer steel bar net sheets, wherein one layer of steel bar net sheet 61 is arranged in the prefabricated inner leaf concrete wall boards 6 (formed by vertical stressed steel bars indicated by the reference signs of '611' and horizontal stressed steel bars indicated by '612' in fig. 7, and a connecting piece system is not illustrated in fig. 7), the other layer of steel bar net sheet 51 is arranged on one side of the cavity 5 close to the heat preservation layer 4 and is bound and fixed with the rod body of the adjacent rod-shaped connecting piece 200 and the oblique web rod body of the independent truss connecting piece, and the distance between binding points is not more than 1000 mm. Each layer of reinforcing steel mesh of the bearing wall is formed by welding or binding a plurality of uniformly arranged horizontal stressed reinforcing steel bars and vertical stressed reinforcing steel bars, the diameter of each reinforcing steel bar is not less than 8mm, and the stress requirement of the shear wall is met. Set up individual layer reinforcing bar net piece 31 in prefabricated outer leaf concrete wallboard 3, the reinforcing bar diameter is not less than 5mm, and satisfies outer leaf concrete wallboard 3's atress and construction requirement.
The interface conditions between the post-cast concrete in the cavity 5 and the precast concrete in the inner leaf concrete wall panel 6 are divided into two types:
the first method comprises the following steps: the stress requirement can be met only through the bonding effect of the natural rough surface or the artificial rough surface, and interface reinforcing steel bars are not arranged in the sandwich heat-insulation superposed shear wall member;
and the second method comprises the following steps: when the stress requirement of the interface is high (such as the axial compression ratio of a shear wall in a high-rise building is high, the interface has a separation risk when the shear wall is compressed, or the vertical reinforcement arrangement of the shear wall is large, the interface has a slip risk when the reinforcement is fully stressed, and the like), in order to ensure that the concrete poured in the cavity 5 and the precast concrete of the inner leaf concrete wall plate 6 can cooperatively bear force and enhance the integrity of the shear wall, a plurality of interface reinforcements 7 are vertically arranged in the sandwich heat-insulating superposed shear wall member, see fig. 7, the interface reinforcements 7 vertically penetrate through the interface 62 between the cavity 5 and the inner leaf concrete wall plate 6, and the interface reinforcements 7, the reinforcement mesh sheets 61 in the inner leaf concrete wall plate 6 and the construction reinforcements (including the vertical construction reinforcements 52 and the horizontal construction reinforcements 53) in the cavity 5 form an embedded reinforcement framework. During actual manufacturing, the interface steel bars 7, the vertical stressed steel bars 611 of the steel mesh sheets 61 in the inner leaf concrete wall panel 6 and the vertical structural steel bars 52 in the cavity 5 can be welded to form welded lattice steel bars, and then the welded lattice steel bars, the horizontal stressed steel bars 612 of the steel mesh sheets 61 in the inner leaf concrete wall panel 6 and the horizontal structural steel bars 53 in the cavity 5 are welded and combined to form an integral embedded steel bar framework.
In another embodiment, a layout mode of the independent truss connecting members in the shear wall prefabricated member with the window openings is given, referring to fig. 8, the shear wall prefabricated member has two window openings 8 and 9, compared with embodiment 1, in the shear wall prefabricated member of the embodiment, one vertically-arranged independent truss connecting member 150 is additionally arranged between the two window openings, the other four independent truss connecting members (110-140) are positioned at the periphery of the two window openings, the layout requirement is the same as embodiment 1, the additionally-arranged vertical independent truss connecting member 150 is as high as the other two vertical independent truss connecting members (110, 120), and is coaxial with the central connecting line of the two horizontal independent truss connecting members (130, 140).
According to the specific embodiment, the manufacturing process and method of the sandwich heat-preservation laminated shear wall prefabricated part provided by the invention are as follows, and refer to fig. 9:
s1: binding a steel bar mesh 31 in the outer leaf concrete wall plate 3; and (3) installing and fixing the independent truss connecting pieces (110-140) and the rod-shaped connecting pieces (200), wherein the rod-shaped connecting pieces (200) can be installed in a rear insertion mode after outer leaf wallboard concrete is poured in S2.
S2: pouring outer leaf wallboard concrete; laying a heat insulation plate serving as the heat insulation layer 4, wherein holes can be drilled in advance and provided with gaps, and the drilled holes can conveniently penetrate through the rod-shaped connecting pieces 200 installed in the step S1 or can be conveniently inserted into the rod-shaped connecting pieces at the step; the gaps are used for penetrating through the independent truss connecting pieces (110-140), and after the heat insulation boards are installed in place, all the gaps are filled with heat insulation materials; the mesh of rebars 51 in the cavity 5 is then installed and secured to the connector system.
S3: binding and installing a steel bar mesh 61 or an embedded steel bar framework 60 of the inner leaf concrete wallboard 6, and then pouring concrete; then, the outer leaf concrete wall plate 6 which is poured and has the concrete strength meeting the requirements, the heat insulation plate, the connecting piece system and the reinforcing steel bar net piece 51 in the cavity are integrally turned for 180 degrees by utilizing turning equipment (existing equipment), so that one side of the heat insulation plate and one side of the connecting piece system are integrally turned downwards.
S4: the whole of the outer leaf concrete wallboard 3 and the heated board, the connecting piece system, the cavity after will overturn, the reinforcing bar net piece 51 moves to the inner leaf concrete wallboard 6, finally makes all connecting piece tip impress the inner leaf concrete wallboard 6, then vibrates the concrete of the inner leaf concrete wallboard 6, makes the part that the connecting piece stretched into the concrete fully contact with the concrete, treats after the concrete intensity satisfies the requirement, the component preparation is accomplished.
In conclusion, all parts in the connecting piece system are stressed clearly, the problems that the traditional connecting piece system is not stressed clearly and the design calculation is not clear are solved, the problems that the traditional sandwich heat-insulation shear wall is restrained by the connecting piece to generate a combination effect strongly and further the outer leaf wall is cracked and deformed are solved effectively, and the non-combination stress mode of the sandwich heat-insulation superposed shear wall is realized.
In the description herein and in the drawings, the products and methods of the present invention are described in terms of particular shapes, materials, or process sequences, and specific parameters are provided for illustrative purposes with respect to specific embodiments. It should be understood, however, that the detailed description is not intended to limit the invention; that is, variations and modifications in the form, material, or process sequence may be made while remaining within the spirit and scope of the invention.
Claims (9)
1. A sandwich heat-insulation superposed shear wall prefabricated part comprises an outer leaf concrete wall plate (3), a heat-insulation layer (4), a cavity (5), an inner leaf concrete wall plate (6) and a connecting piece system for connecting the inner leaf concrete wall plate and the outer leaf concrete wall plate (3, 6), wherein the outer leaf concrete wall plate (3), the inner leaf concrete wall plate (6) and one side of the cavity (5) close to the outer leaf concrete wall plate (3) are respectively provided with a layer of steel mesh; the concrete wall is characterized in that the connecting piece system penetrates through the cavity (5) and the heat insulation layer (4) to extend into the inner leaf concrete wall board and the outer leaf concrete wall board (3 and 6), and comprises at least four independent truss connecting pieces (110, 120, 130 and 140) and a plurality of rod-shaped connecting pieces (200) with the lengths arranged along the thickness direction of the shear wall;
the rod-shaped connecting pieces (200) are metal or nonmetal anti-pull rods and are dispersedly arranged in the plane range of the wall body, the distance between every two adjacent rod-shaped connecting pieces is 200-600 mm, and the distance between the rod-shaped connecting pieces (200) positioned at the bottom of the wall body is smaller than that between the other areas;
the independent truss connecting pieces are identical in structure, used for bearing pressure, shearing force, partial tension and resisting torsion and formed by welding two inner chord steel bars (113 and 114) positioned on the inner leaf concrete wall plate (6), two outer chord steel bars (111 and 112) positioned on the outer leaf concrete wall plate (3), four diagonal web members (121-124) penetrating through the cavity (5) and the heat insulation layer (4) and four transverse steel bars (131-134); the first diagonal web member (121), the second diagonal web member (122), the third diagonal web member (123) and the fourth diagonal web member (124) are arranged in a splayed shape to form two pairs of diagonal web members, two ends of the first pair of diagonal web members (121, 122) are respectively welded with the first outer chord steel bar (111) and the first inner chord steel bar (113), two ends of the second pair of diagonal web members (123, 124) are respectively welded with the second outer chord steel bar (112) and the second inner chord steel bar (114), and the two pairs of diagonal web members are connected through four transverse steel bars (131-134); the concrete specification and the distance of each independent truss connecting piece are determined according to the compression and shearing calculation of the connecting pieces, meanwhile, the intersection point of the central connecting line of two vertically arranged independent truss connecting pieces and the central connecting lines of two horizontally arranged independent truss connecting pieces is close to the centroid position of the sandwich heat-insulation superposed shear wall as much as possible, and the minimum distance between the center of each independent truss connecting piece and the concrete edge of the prefabricated member of the sandwich heat-insulation superposed shear wall is 300 mm.
2. The sandwich insulation composite shear wall member according to claim 1, wherein when the rod-shaped connecting members are metal tension resistant members, the rod-shaped connecting members are made of metal with a lower thermal conductivity than carbon steel, and have a circular cross-sectional shape, each rod-shaped connecting member is a single rod-shaped or U-shaped member, and hooks or wave-shaped sections are provided at portions of each rod-shaped connecting member anchored into the inner and outer concrete wall panels.
3. The sandwich insulation composite shear wall member according to claim 1, wherein the rod-shaped connecting members are single-rod type when non-metallic anti-pulling members are used, and the part of each rod-shaped connecting member anchored into the inner concrete wall panel and the outer concrete wall panel is provided with enlarged heads or grooves.
4. The sandwich insulation composite shear wall member according to claim 1, wherein the independent truss connecting members are parallel to each other, the chords are hot-rolled or cold-rolled ribbed steel bars, the diameter and the length of the independent truss connecting members are determined according to requirements of tension anchoring of the diagonal web members and the spacing between the diagonal web members, the diameters of the chords are not less than 6mm, and the spacing between the chords in the concrete wall panels on the same side is 40-200 mm.
5. The sandwich insulation superimposed shear wall member according to claim 1, wherein the independent truss connecting member is provided with a first constraint sleeve respectively sleeved on each diagonal web member within the range of the insulation layer, and a gap for providing a compression deformation space for the diagonal web members exists between the end of each first constraint sleeve and the two side edges of the insulation layer; or a second constraint sleeve is respectively sleeved on each diagonal web member within the range of the heat-insulating layer and the cavity, and a gap for providing a compression deformation space for the diagonal web members exists between the end part of each second constraint sleeve and the outer edge of the heat-insulating layer as well as the outer edge of the inner leaf concrete wall plate; the first constraint sleeve and the second constraint sleeve are both hard nonmetal tube bodies, the cross sections of the first constraint sleeve and the second constraint sleeve are circular, and the cross section of each constraint sleeve is slightly larger than that of the inner diagonal web member so as to facilitate the penetration of each constraint sleeve and ensure that a proper deformation space is provided for the inner diagonal web member.
6. The sandwich heat-insulation superposed shear wall component according to claim 1, further comprising a structural reinforcing mesh sheet positioned in the cavity and a plurality of interface reinforcing bars vertically arranged, wherein each interface reinforcing bar vertically penetrates through an interface between the cavity and the inner leaf concrete wall panel and forms an embedded reinforcing steel bar framework with the structural reinforcing mesh sheet in the cavity and the reinforcing mesh sheet in the inner leaf concrete wall panel respectively.
7. A manufacturing method of the sandwich heat-insulation laminated shear wall member according to any one of claims 1 to 5, characterized by comprising the following steps:
s1: binding the steel bar meshes in the outer leaf concrete wall plate; installing and fixing a connector system consisting of independent truss connectors and rod-shaped connectors on the reinforcing mesh;
s2: pouring outer leaf wallboard concrete; then laying a heat insulation plate serving as the heat insulation layer, wherein the heat insulation plate is provided with a pre-drilled hole and a notch, and the drilled hole is used for penetrating through each rod-shaped connecting piece; the notches are used for penetrating through the independent truss connecting pieces, and after the heat insulation boards are installed in place, all the notches are filled with heat insulation materials; then installing the reinforcing mesh in the cavity, and fixing the reinforcing mesh in the connecting piece system;
s3: binding and installing steel bar meshes in the inner leaf concrete wall board, and then pouring concrete; and then the integrally-turned outer leaf concrete wall board, the heat-insulating board, the connecting piece system and the reinforcing mesh in the cavity which are poured and have the concrete strength meeting the requirements are turned over for 180 degrees, so that one side of the heat-insulating board and the connecting piece system is integrally turned downwards, and the outer leaf concrete wall board is turned upwards.
S4: the whole steel mesh in the outer leaf concrete wallboard, the insulation board, the connecting piece system and the cavity after overturning moves towards the inner leaf concrete wallboard, so that the end parts of all the connecting pieces are pressed into the inner leaf concrete wallboard, then the concrete of the inner leaf concrete wallboard is vibrated, the parts of all the connecting pieces extending into the concrete are fully contacted with the concrete, and after the concrete strength meets the requirement, the member is manufactured.
8. The method of claim 7, wherein the step of installing and fixing the rod-shaped connectors on the mesh reinforcement plates in step S1 is performed after the insulation plates are laid in step S2.
9. The method for manufacturing the sandwich heat-preservation laminated shear wall component according to claim 7, wherein the steel mesh sheets in the inner leaf concrete wall panel are replaced by the embedded steel bar frameworks in the step S3, and the embedded steel bar frameworks are formed by welding a plurality of interface steel bars which vertically penetrate through the interface between the cavity and the inner leaf concrete wall panel and are vertically arranged with the steel mesh sheets in the inner leaf concrete wall panel and the structural steel mesh sheets in the cavity respectively.
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| AU2020101262B4 (en) * | 2020-05-26 | 2020-10-01 | P L Martin Pty. Ltd. | A Building System |
| CN112277153A (en) * | 2020-10-21 | 2021-01-29 | 三一筑工科技有限公司 | Cavity wall and production method thereof |
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| CN113047515A (en) * | 2021-03-15 | 2021-06-29 | 享城科建(北京)科技发展有限公司 | Connecting structure of sandwich wallboard, sandwich wallboard and preparation method of sandwich wallboard |
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| AU2020101262B4 (en) * | 2020-05-26 | 2020-10-01 | P L Martin Pty. Ltd. | A Building System |
| CN112277153A (en) * | 2020-10-21 | 2021-01-29 | 三一筑工科技有限公司 | Cavity wall and production method thereof |
| CN112549247A (en) * | 2020-12-01 | 2021-03-26 | 河北建工建筑装配股份有限公司 | Production method of 3D printing exterior wall cladding |
| CN112647616A (en) * | 2020-12-23 | 2021-04-13 | 江苏精享裕建工有限公司 | Novel reinforced concrete superimposed shear wall structure |
| CN112627430A (en) * | 2021-01-30 | 2021-04-09 | 山东海龙建筑科技有限公司 | Fabricated component with crack suppression function and construction method thereof |
| CN113047515A (en) * | 2021-03-15 | 2021-06-29 | 享城科建(北京)科技发展有限公司 | Connecting structure of sandwich wallboard, sandwich wallboard and preparation method of sandwich wallboard |
| CN113319982A (en) * | 2021-07-06 | 2021-08-31 | 广东中建新型建筑构件有限公司 | Method for forming rough surface on side surface of precast concrete convex window |
| CN113319982B (en) * | 2021-07-06 | 2022-05-17 | 广东中建新型建筑构件有限公司 | Method for forming rough surface on side surface of precast concrete convex window |
| CN117183084A (en) * | 2023-11-07 | 2023-12-08 | 北京建工四建工程建设有限公司 | Manufacturing method of sandwich external wall panel with VIP (VIP) board composite heat insulation layer |
| CN117183084B (en) * | 2023-11-07 | 2024-02-27 | 北京建工四建工程建设有限公司 | Manufacturing method of sandwich external wall panel with VIP (VIP) board composite heat insulation layer |
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