CN110805169A - Vertical seam splicing structure of prefabricated wall board and assembling method thereof - Google Patents
Vertical seam splicing structure of prefabricated wall board and assembling method thereof Download PDFInfo
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- CN110805169A CN110805169A CN201910953773.4A CN201910953773A CN110805169A CN 110805169 A CN110805169 A CN 110805169A CN 201910953773 A CN201910953773 A CN 201910953773A CN 110805169 A CN110805169 A CN 110805169A
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- prefabricated wall
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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
- E04B2/64—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of concrete
- E04B2/68—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of concrete made by filling-up wall cavities
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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
- E04B2/64—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of concrete
- E04B2/66—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of concrete characterised by special cross-section of the elongated members
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
- E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
- E04C2/288—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and concrete, stone or stone-like material
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
Abstract
The invention discloses a prefabricated wallboard and a vertical seam splicing structure thereof, wherein the vertical seam splicing structure comprises at least two prefabricated wallboards, anchoring ribs extend out of the vertical side end faces of the prefabricated wallboards, the side end faces of more than two prefabricated wallboards are spliced and enclosed in the horizontal direction to form a wallboard key groove, a spiral stirrup is arranged in the wallboard key groove, vertical longitudinal ribs are arranged in a space where the spiral stirrup and the anchoring ribs are crossed, and cast-in-place concrete is filled in the wallboard key groove to connect the prefabricated wallboards together. The wallboard connection structure of a style of calligraphy, L type or T type can be formed in the concatenation of prefabricated wallboard level more than two, and the concatenation of three prefabricated wallboard level forms T type connection structure, and the concatenation of four prefabricated wallboard levels forms cross connection structure, sets up spiral stirrup and vertical muscle of indulging in the wallboard keyway between several prefabricated wallboards, pours cast in situ concrete and links together several prefabricated wallboards, and connection structure is reliable.
Description
Technical Field
The invention belongs to the technical field of assembly type buildings, and particularly relates to a vertical seam splicing structure of a prefabricated wallboard and an assembly method thereof.
Background
In the prior art, the used connection mode mainly comprises a dry connection mode and a wet connection mode for the vertical seam splicing structure of the prefabricated wall panel in the wall panel structure system. When dry-method connection is adopted, adjacent prefabricated wall boards are butted and fixed through pre-buried metal connecting pieces, and in such a connection mode, gaps exist between the adjacent wall boards and can only be covered through later-stage repair; and the decoration material is easy to crack under the condition of expansion with heat and contraction with cold, which causes the trouble of later maintenance. There are two main specific ways of wet bonding: 1. the vertical connecting parts of the adjacent prefabricated wall boards are subjected to on-site formwork erecting by adopting aluminum molds or wood molds and are connected by cast-in-place concrete; 2. the concrete construction method comprises the steps of reserving gaps on the side end faces of prefabricated wall boards, embedding soft cable anchor rings in the gaps, enabling the side end faces between the two prefabricated wall boards to form steps matched with each other, inserting vertical through-length steel bars into the two soft cable anchor rings during site construction, and then pouring concrete into the gaps, wherein the specific scheme is shown in patent document CN206337655U, namely an assembly type concrete wall board and a reinforced soft cable anchor ring connecting structure thereof. Wet-bonding also has the following problems: 1. the work load of on-site formwork support is increased by erecting the formwork; 2. when the two wallboards are horizontally spliced, the vertical through-length steel bars are difficult to insert to align to each soft cable during construction, long time is consumed, the shape of the soft cable is unfixed, once the soft cable is deformed, the vertical through-length steel bars are difficult to insert, and the construction efficiency is low; and the stress performance of the cast-in-place belt between adjacent walls is general, and the cast-in-place belt cannot be applied to high floors and areas with larger seismic intensity.
Therefore, a new vertical seam splicing structure of prefabricated wallboards and an assembling method thereof need to be developed, reliable connection of the wallboards on the aspect of mechanical property can be realized, the anti-seismic performance is strong, a template does not need to be erected during site construction, and the construction efficiency is improved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a vertical seam mosaic structure of prefabricated wallboard and assembly method thereof to solve the technical problems that the vertical seam mosaic structure of prefabricated wallboard in the prior art has unsatisfactory stress performance, inconvenient construction and the like.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a prefabricated wallboard, the vertical concatenation face of prefabricated wallboard has seted up vertical logical long breach, be provided with the anchor muscle in leading to the long breach, the one end of anchor muscle pre-buried in the concrete of prefabricated wallboard, the other end is located just do not surpass in leading to the long breach the outward flange that leads to the long breach. In the scheme, the anchoring ribs do not exceed the edges of the gaps of the prefabricated wall panels. Lead to long breach is seted up at the left side terminal surface of prefabricated wallboard or right side terminal surface or indoor side surface in this scheme, leads to long breach is arranged in to pre-buried stirrup partly in prefabricated wallboard, nevertheless does not surpass the edge. By the arrangement, when the prefabricated wallboard is prefabricated in a factory, rib holes do not need to be formed in the edge mould, so that the mould structure is simplified, and the difficulty in assembling and disassembling the mould is also simplified; when the prefabricated wall panel is transported, the exposed stirrups are not easily touched due to the protection of the edge of the prefabricated wall panel, so that the bending of the reinforcing steel bars in the transportation process is avoided; the splicing that leads to the length breach is relative with two prefabricated component forms concrete placement's wallboard keyway when the assembly, and leads to the interior stirrup part of length breach and can combine with cast in situ concrete, has strengthened precast concrete and cast in situ concrete partial connection like this, because the logical length breach edge amalgamation of two wallboards has formed the enclosure space, consequently need not to set up cast in situ concrete's template again, has optimized the construction process, has improved the efficiency of construction, has reduced construction cost.
On the basis of above-mentioned embodiment, it is preferred, prefabricated wallboard still includes upper reinforcing bar net piece, lower floor's reinforcing bar net piece and is located the marginal framework of steel reinforcement between the two, marginal framework of steel reinforcement sets up the vertical concatenation department at prefabricated wallboard, marginal framework of steel reinforcement includes the anchor muscle. Set up the marginal framework of steel reinforcement who is used for connecting double-sided reinforcing bar net piece like this and regard as the stirrup promptly, the stirrup on outermost side plays dual function, can also play the effect of interim support to the reinforcing bar net piece on upper strata, reduces temporary support piece's in the mould use, and production process is simple, rational in infrastructure.
Preferably, double-sided steel bar net sheets are arranged in the prefabricated wall board, and the two double-sided steel bar net sheets are connected through a plurality of anchoring ribs at positions close to the end face of the vertical side. By the arrangement, the operation procedure of additionally placing the anchoring ribs is reduced, and the production efficiency is improved; and the double-sided mesh reinforcing steel bars have good integrity, and the double-sided mesh reinforcing steel bars are anchored in the precast concrete and the cast-in-place concrete simultaneously, so that the integrity of the precast wallboard can be improved, and the precast concrete and the cast-in-place concrete can be better connected together.
Preferably, the through-length notch is a C-shaped groove or a step-shaped notch.
Preferably, the prefabricated wallboard is the side fascia, includes exterior trim layer, heat preservation and bearing layer from outside to inside in proper order, it establishes to lead to long breach on the bearing layer. With outer decoration layer, heat preservation and bearing layer setting together, and only set up the breach on the bearing layer, when guaranteeing to be connected between with other wallboards, outer decoration layer and heat preservation still play the waterproof effect of heat preservation.
Preferably, the side edges of the heat-insulating layer and the outer decoration layer form an L-shaped package on the side edge of the bearing layer, and the through-length notch is formed in the indoor side surface, close to the side edge of the heat-insulating layer, of the bearing layer.
Preferably, the prefabricated wall panel is interior wallboard, lead to long breach set up in the indoor side surface of interior wallboard.
The invention also provides a vertical seam splicing structure of the prefabricated wall panel, which comprises the prefabricated wall panel, wherein vertical splicing surfaces of at least two prefabricated wall panels are enclosed to form a wall panel key groove, a spiral stirrup is arranged in the wall panel key groove, a vertical longitudinal rib is inserted into a space where the spiral stirrup and the anchoring rib are crossed, and cast-in-place concrete is filled in the wall panel key groove to connect the prefabricated wall panels together. In this scheme, can form a style of calligraphy connection structure or L type connection structure or T type connection structure through the horizontal concatenation between two prefabricated wallboards, can splice between the three prefabricated wallboard and become T type connection structure, can the horizontal concatenation be cross mosaic structure between four prefabricated wallboards. The commonality of prefabricated wallboard is strong, and the concatenation mode between the prefabricated wallboard more than two is more free, and the concatenation forms the wallboard keyway between the prefabricated wallboard, sets up spiral stirrup and vertical longitudinal bar in the wallboard keyway, then reappears cast concrete and connect. The vertical longitudinal ribs restrain the anchoring ribs and the spiral stirrups together, and after the three are anchored by concrete, a hidden column structure is formed by the concrete, namely the rigid key grooves of the wall boards, so that on one hand, the connection strength, the shearing resistance and the seismic resistance between the prefabricated wall boards are improved, and the prefabricated wall boards can be used for wall board structures with more than 6 layers and can be used in areas with larger seismic intensity; on the other hand, the technical problem that a wet connection node needs to be provided with a template or vertical longitudinal ribs are inserted into the soft cable and difficult to operate in the prior art is solved, the site construction is convenient, and the construction quality and efficiency are ensured; and the cast-in-place concrete at the gap of the single prefabricated wallboard forms a shear key, so that the effect of connecting the prefabricated concrete and the cast-in-place concrete is achieved, and the connection strength of the concrete between the prefabricated wallboard and the wallboard key groove is increased.
Preferably, the vertical end face that prefabricated wallboard spliced each other department still is provided with the reinforcement stirrup, the end of reinforcement stirrup is arranged in the breach of the vertical side end face of prefabricated wallboard. Set up the reinforcement stirrup, on the one hand can strengthen the intensity of prefabricated wallboard side end face, on the other hand reinforcement stirrup end stretches out from prefabricated wallboard side end face, is connected with cast in situ concrete, has improved cast in situ concrete's intensity, has also strengthened the joint strength between the prefabricated wallboard.
On the basis of the above embodiment, preferably, the spiral stirrup and the vertical longitudinal bar penetrate through the wallboard key groove in the vertical direction. The integrity and the connection strength of the reinforced concrete in the wall plate key groove between the prefabricated wall plates are ensured.
The invention also provides an assembling method of the vertical seam splicing structure of the prefabricated wall panel, which comprises the following steps:
s1, hoisting and positioning the first prefabricated wall board, then hoisting the second prefabricated wall board and the rest prefabricated wall boards in sequence, and horizontally splicing and enclosing the vertical side end faces of the prefabricated wall boards to form wall board key grooves;
s2, inserting vertical longitudinal ribs into the anchoring ribs of the prefabricated wall board and binding and fixing the vertical longitudinal ribs with the anchoring ribs;
s3, rotating the spiral stirrup from the top side to the bottom side of the wallboard key groove, and simultaneously keeping the vertical longitudinal rib arranged inside the spiral stirrup;
and S4, pouring cast-in-place concrete into the key groove of the wallboard, and curing and forming.
Preferably, the step S1 and the step S2 are combined into one step: before each prefabricated wall panel is hoisted, vertical longitudinal ribs are inserted and bound and fixed inside anchoring ribs extending out of the side end face of each prefabricated wall panel, and then each prefabricated wall panel is hoisted and positioned in sequence.
The technical scheme of the invention has the beneficial technical effects that:
1. in the scheme, the notches are reserved on the side edges of the prefabricated wall board, the anchoring ribs are arranged in the through notches, do not protrude out of the side edges of the prefabricated wall board and do not exceed the edges of prefabricated parts, a mold is simple and easy to demould during production, transportation is convenient, and the loading rate is improved;
2. according to the scheme, a plurality of anchoring ribs extend out of the side end face of the prefabricated wallboard, more than two prefabricated wallboards are horizontally spliced to form a straight-line-shaped, L-shaped or T-shaped wallboard connecting structure, three prefabricated wallboards are horizontally spliced to form a T-shaped connecting structure, four prefabricated wallboards are horizontally spliced to form a cross-shaped connecting structure, spiral stirrups and vertical longitudinal ribs are arranged in wallboard keyways among the prefabricated wallboards, cast-in-place concrete is poured to connect the anchoring ribs, the bolt stirrups and the vertical longitudinal ribs together, and reliable connection among the prefabricated wallboards is achieved; the prefabricated wallboard connection structure of this scheme is strong, the shear resistance is strong, the anti-pulling ability is strong, applicable in the higher area of earthquake intensity, also can be applicable to the wallboard structure more than 6 storied buildings.
3. In the horizontal connecting structure of the prefabricated wall boards, the gaps between the adjacent prefabricated wall boards are spliced into the wall board key groove to form a relatively closed space, and when concrete is poured into the key groove, the edges of the gaps can play a role of a template without erecting the template on a construction site; the site operation is very convenient, and the construction efficiency is high.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
Fig. 1 is a horizontal sectional view of a horizontal splicing structure of prefabricated wall panels in example 1;
FIG. 2 is a horizontal sectional view of the horizontal splicing structure of the prefabricated wall panel of example 2;
FIG. 3 is a horizontal sectional view and an internal reinforcement schematic view of a horizontal splicing structure of prefabricated wall panels in example 3;
FIG. 4 is a horizontal sectional view of the horizontal splicing structure of the prefabricated wall panel of example 4;
FIG. 5 is a horizontal sectional view of the horizontal splicing structure of the prefabricated wall panel of example 5;
FIG. 6 is a horizontal sectional view of the horizontal splicing structure of prefabricated wall panels of example 6;
FIG. 7 is a horizontal sectional view of the horizontal splicing structure of the prefabricated wall panel of example 7;
FIG. 8 is a horizontal sectional view of the horizontal splicing structure of prefabricated wall panels in example 8;
fig. 9 is a perspective view of a second prefabricated wall panel of example 5 (showing the spiral stirrups and the vertical longitudinal bars);
fig. 10 is a right side view of fig. 6.
Reference numerals: 1-a first prefabricated wall board, 101-a bearing layer, 102-a heat insulation layer, 103-an outer decoration layer, 2-a second prefabricated wall board, 3-a wall board key groove, 4-an anchoring rib, 5-a C-shaped groove, 6-a step, 7-a reinforcing steel bar mesh, 8-a reinforcing stirrup, 9-a vertical longitudinal rib, 10-a spiral stirrup, 11-a third prefabricated wall board and 13-an additional stirrup.
Detailed Description
The present invention will now be described in detail with reference to the drawings, which are given by way of illustration and explanation only and should not be construed to limit the scope of the present invention in any way. Furthermore, features from embodiments in this document and from different embodiments may be combined accordingly by a person skilled in the art from the description in this document.
Example 1
Referring to the schematic diagram 1, the wallboard structure of the embodiment is an external wallboard with a linear structure, and sequentially comprises an internal bearing layer 101, a middle insulating layer 102 and an external decoration layer 103, wherein a double-faced reinforcing mesh 7 is anchored in concrete of the bearing layer 101, a C-shaped groove 5 which is long and has the same height with the bearing layer 101 is formed in the left end face of the bearing layer 101, and the middle of the C-shaped groove 5 is deep and the two sides are shallow. The difference between the double-sided steel mesh 7 in this embodiment and embodiment 1 is that: the novel wall plate comprises two rows of vertical ribs with the same height as the wall plate, one row of vertical ribs is close to the outer side of the bearing layer 101, the other row of vertical ribs is close to the inner side of the bearing layer 101, and the novel wall plate also comprises a plurality of rows of lifting reinforcing rings arranged on the outer side of the vertical ribs, the tail ends of a plurality of reinforcing rings are exposed out of the C-shaped groove 5, and the exposed reinforcing rings do not exceed the edge of the C-shaped groove 5.
The prefabricated wall panel in this embodiment is in production: the production can be carried out by adopting a reverse beating method or a sequential method, wherein the reverse beating method is that the finishing layer and the heat-insulating layer 102 are firstly placed, and then the bearing layer 101 is poured; the sequential production method is to produce the bearing layer 101, lay the insulating layer 102 and the outer decoration layer 103 when the bearing layer 101 is not completely solidified and formed, and connect and fix the three layers through connecting pieces.
Continuing to refer to the schematic diagram 1, the two prefabricated wall panels in this embodiment are horizontally spliced to form a straight-line-shaped wall panel connection structure, which includes two first prefabricated wall panels 1 and two second prefabricated wall panels 2 adjacently arranged from left to right. The terminal surface of first prefabricated wallboard 1 and the mutual concatenation of second prefabricated wallboard 2 all is provided with the breach that vertical direction leads to long, and the breach shape is C type recess 5 in this embodiment. The end faces of the first prefabricated wall panel 1 and the second prefabricated wall panel 2 which are spliced mutually extend out of the anchoring ribs 4, and the anchoring ribs 4 are arranged in the grooves and do not exceed the side end faces of the first prefabricated wall panel or the second prefabricated wall panel 2. The notch amalgamation of first prefabricated wallboard 1 and second prefabricated wallboard 2 forms wallboard keyway 3, is provided with a spiral stirrup 10 in wallboard keyway 3. Still be provided with vertical longitudinal reinforcement 9 respectively in the space that first prefabricated wallboard 1 and the 4 alternately enclosure of anchor muscle of prefabricated wallboard 2 of second closed, the intussuseption of wallboard keyway 3 is filled with cast in situ concrete and is linked together first prefabricated wallboard 1 and the prefabricated wallboard 2 of second. By the arrangement, the vertical longitudinal ribs 9 are inserted between the spiral stirrup 10 and the anchoring rib 4, so that the spiral stirrup 10 and the anchoring rib 4 can be restrained, the connection reliability between the spiral stirrup 10 and the anchoring rib 4 is ensured, and the two prefabricated wallboards cannot be separated from each other even in an earthquake; after the concrete is cast in place, a hidden column structure is formed between the two wallboards, so that the tensile strength and the seismic performance of the wallboard key groove 3 are enhanced; when cast in situ concrete in the wallboard keyway 3 between two wallboards, the recess edge of first and second prefabricated wallboard 2 can act as the template, consequently need not to set up the template of piece department once more at the job site, has alleviateed the site operation volume, has improved the efficiency of construction.
Continuing to refer to the schematic diagram 1, double-sided reinforcing mesh sheets 7 are pre-embedded in the first prefabricated wall panel 1 and the second prefabricated wall panel 2, the outermost sides of the double-sided reinforcing mesh sheets 7 in the vertical direction are exposed from the vertical side end faces to form anchoring ribs 4, and the width of the anchoring ribs 4 does not exceed the edge of the first prefabricated wall panel 1 or the second prefabricated wall panel 2. In this embodiment, the top-view outer contour of the spiral stirrup 10 is circular, and the diameter of the spiral stirrup 10 is larger than the width of the C-shaped groove 5 and smaller than the width of the wallboard key groove 3. In other embodiments, spiral stirrup 10 may be configured in a mating shape, such as square or polygonal, depending on the shape of wallboard keyway 3.
The construction method of the prefabricated wall panel connecting structure in the embodiment comprises the following steps:
s1, hoisting and positioning the first prefabricated wall plate 1, hoisting and positioning the second prefabricated wall plate 2, and horizontally splicing the C-shaped groove 5 of the second prefabricated wall plate 2 and the C-shaped groove 5 of the first prefabricated wall plate 1 to form a wall plate key groove 3;
s2, inserting the first and second vertical longitudinal ribs 9 into the anchoring ribs 4 on the end faces of the first and second prefabricated wall panels 2, then rotating the spiral stirrup 10 from the top side to the bottom side of the wall panel key groove 3, and simultaneously keeping the first and second vertical longitudinal ribs 9 arranged inside the spiral stirrup 10;
and S3, pouring cast-in-place concrete into the wall plate key groove 3, and curing and forming.
This scheme sets up C type recess 5 through the vertical tip at two wallboards, and two C type recesses 5 relatively constitute wallboard keyway 3, link together the anchor muscle 4 of two prefabricated wallboards through spiral stirrup 10 and vertical muscle 9, and the connection between two prefabricated wallboards is realized to the cast in situ concrete of pouring again. The cast-in-place wallboard key groove 3 is equivalent to a hidden column, and two prefabricated wallboards are connected very firmly, so that the straight-line wallboard connecting structure has good stress performance, and has stronger tensile and shock resistance compared with the soft cable connection in the prior art; and the construction is very simple and convenient, the field wet operation is little, the spiral stirrup 10 is very convenient and simple to place, and the problems that the soft cable is deformed and is difficult to insert when the soft cable is used for connection in the prior art are solved.
Example 2
Referring to the schematic diagram 2, the left end face of the prefabricated wall panel of this embodiment is provided with a full-length C-shaped groove 5, wherein a double-faced steel mesh 7 is arranged inside the groove, a plurality of reinforcement stirrups 8 are further anchored in the concrete near the C-shaped groove 5, a part of each reinforcement stirrup 8 is exposed from the C-shaped groove 5, and the exposed part does not exceed the edge of the C-shaped groove 5. Compared with the reinforced concrete strength at the C-shaped groove 5 in the embodiment 1, the reinforcement mode has the advantages that the reinforcement stirrup 8 reinforces the local concrete strength, the exposed part is anchored in the cast-in-place concrete, and the connection strength between the cast-in-place concrete and the precast concrete is improved.
Continuing to refer to schematic diagram 2, two prefabricated wallboard horizontal splicing in this embodiment form a style of calligraphy prefabricated wallboard connection structure, and the difference with the structure in embodiment 1 lies in: the vertical side of first and second prefabricated wallboard 2 still pre-buries a plurality of horizontal direction's reinforcement stirrup 8, and reinforcement stirrup 8's end exposes from prefabricated wallboard side end face, and does not surpass the edge end of first and second prefabricated wallboard 2. Like this two-sided reinforcing bar net piece 7 stretches out from vertical side end face and forms anchor muscle 4 among first and the prefabricated wallboard 2 of second, and 8 ends of reinforcement stirrup also stretch out from vertical side end face and become anchor muscle 4, compare the prefabricated wallboard among the embodiment 1, have improved the density of anchor muscle 4, can strengthen the concrete intensity of prefabricated wallboard groove on the one hand, and on the other hand can strengthen the intensity of the wallboard keyway 3 of two prefabricated wallboards, improves wallboard connection structure's anti-seismic performance.
Example 3
Referring to the schematic diagram 3, the prefabricated wallboard structure of this embodiment is interior wallboard, and the breach that leads to 6 shapes of long step is seted up to the terminal surface on prefabricated wallboard left side and right side, is provided with double faced steel bar net piece 7 in the prefabricated wallboard, connects through a plurality of anchor muscle 4 between the double faced steel bar net piece 7, and the prefabricated wallboard outside limit anchor muscle 4's partly sets up in step 6, exposes in addition that the width of outside anchor muscle 4 is no longer than step 6 edge. The manufacturing method of the interior wall panel in the embodiment is approximately: firstly, arranging a side mould on a bench mould, placing a double-sided reinforcing mesh 7 and an embedded lifting appliance according to the preset position size, and connecting the outermost sides of the two double-sided reinforcing meshes 7 and corresponding cross points on the middle position by using anchoring ribs 4; then pouring concrete, vibrating, curing and forming; finally, demoulding is carried out when the demoulding strength is reached.
Continuing to refer to fig. 3, the in-line prefabricated wall panel connection structure in the present embodiment comprises a first prefabricated wall panel 1 and a second prefabricated wall panel 2, wherein vertical side end faces of the first and second prefabricated wall panels 2 are provided with vertical through-length step 6-shaped notches. Two-sided reinforcing bar net piece 7 is provided with in two prefabricated wallboards, and the side end face of reinforcing bar net piece 7 exposes from 6 form breachs of step and forms anchor muscle 4. The protruding parts of the 6-shaped gaps of the two steps of the first prefabricated wall plate 1 and the second prefabricated wall plate 2 are opposite, and the gaps of the two prefabricated wall plates are spliced to form a wall plate key groove 3. Set up 2 vertical longitudinal reinforcement 9 in the anchor muscle 4 of wallboard keyway 3 respectively, then rotatory to the bottom side from the top side of wallboard keyway 3 with spiral stirrup 10, set up the template in opening one side of wallboard keyway 3, it is full of to pour concrete at last with wallboard keyway 3 to link together first and second prefabricated wallboard 2.
The construction method of the connection structure of the straight-line-shaped prefabricated wall panel in the embodiment has the same steps as those in embodiment 1, and the difference is that: before pouring the concrete of the wall plate key groove 3, a template at one side of the step 6-shaped notch needs to be erected.
Example 4
Referring to the schematic diagram of fig. 4, the first prefabricated wall panel 1 and the second prefabricated wall panel 2 in this embodiment are both external wall panels, and include a bearing layer 101, an insulating layer 102 and an external decoration layer 103, which are sequentially layered from inside to outside; the bearing layer 101 is provided with a double-faced reinforcing mesh 7, and the vertical side end face of the bearing layer 101 is provided with a through-long groove. The vertical side end faces of the external decoration layer 103 and the heat insulation layer 102 in the first prefabricated wall board 1 are flush with the bearing layer 101, and the vertical side end faces of the external decoration layer 103 and the heat insulation layer 102 in the second prefabricated wall board 2 are wider than the bearing layer 101. The anchoring ribs 4 of the bearing layer 101 of the two prefabricated wall panels extend beyond the edge of the bearing layer 101. The anchoring ribs 4 of the first prefabricated wall board 1 and the second prefabricated wall board 2 are opposite, the outer decoration layer 103 and the heat insulation layer 102 of the first prefabricated wall board 1 are connected with the outer decoration layer 103 and the heat insulation layer 102 of the second prefabricated wall board 2, and a wall board key groove 3 is formed between the grooves of the two bearing layers 101. Be provided with the outline in wallboard keyway 3 and be columniform spiral stirrup 10, spiral stirrup 10 and the inside vertical muscle 9 that is provided with of the cross space of the anchor muscle 4 of two prefabricated wallboards, cast in situ concrete links together first and second prefabricated wallboard 2 in wallboard keyway 3. In this embodiment, the exterior layer 103 and the insulating layer 102 serve as the exterior formwork of the wallboard key slot 3, so that only the interior formwork needs to be erected, and the construction is relatively simple. The construction method in this embodiment is basically the same as that in embodiment 1, and will not be described herein.
Continuing to refer to fig. 4, in this embodiment, an n-shaped open stirrup is pre-embedded in the side end surface of the bearing layer 101, wherein the open end is pre-embedded in the precast concrete of the bearing layer 101, and the arc end extends into the groove and protrudes out of the edge of the bearing layer 101. The strength of the side end part of the prefabricated wall panel is enhanced, and meanwhile, the integrity of the horizontal splicing structure of the prefabricated wall panel is improved.
In this embodiment, the anchoring ribs 4 of the bearing layer 101 exceed the groove edges of the bearing layer 101, so that the space of the wallboard key groove 3 formed when the two prefabricated wallboards are horizontally spliced 2 is larger. In other embodiments, the anchoring ribs 4 can also be arranged to protrude from the edges of the grooves when the outer decoration layer 103 and the insulation layer 102 are flush with the bearing layer 101, or in the inner wall board; therefore, concrete is poured after templates are erected on the two sides of the wallboard key groove 3.
Example 5
Referring to fig. 5, 9 and 10, the prefabricated wall panel in this embodiment is an integral in-line-shaped external wall panel, and includes, from outside to inside, an external decorative layer 103, an insulating layer 102 and a load-bearing layer 101, wherein at one end of one side, the insulating layer 102 and the external decorative layer 103 form an L-shaped package for the load-bearing layer 101. The indoor side surface of the bearing layer 101 is provided with a C-shaped groove 5 which is as high as and long as the prefabricated wall board at the position close to the end face of the insulating layer 102. Wherein, the precast concrete is provided with a double-sided steel mesh 7, and a part of the steel mesh 7 is exposed out of the C-shaped groove 5. In this embodiment, a plurality of closed anchoring ribs 4 are further arranged in the precast concrete at the C-shaped groove 5, the closed anchoring ribs 4 are bound with the double-sided reinforcing mesh 7, and the tail ends of the closed anchoring ribs 4 are exposed out of the C-shaped groove 5. Set up like this, strengthened the concrete strength of C type recess 5 department, avoided here to become prefabricated wallboard atress weak area.
Referring to fig. 5, the L-shaped prefabricated wall panel connection structure in this embodiment includes a first prefabricated wall panel 1 and a second prefabricated wall panel 2 which are spliced in a horizontal direction to form an L-shape.
Referring to fig. 5, 9 and 10, in this embodiment, the first prefabricated wall panel 1 and the second prefabricated wall panel 2 are external wall panels, and include an external finishing layer 103, an insulating layer 102 and a bearing layer 101, which are sequentially layered from the outside to the inside. The vertical side end faces of the outer decorative layer 103 and the heat insulation layer 102 of the first prefabricated wall panel 1 surround the side end face of the bearing layer 101, a gap which is long in the vertical direction is formed in the indoor side, close to the heat insulation layer 102, of the bearing layer 101, and a gap which is long in the vertical direction is formed in the vertical side end face of the bearing layer 101 of the second prefabricated wall panel 2. The double-faced reinforcing mesh 7 is pre-embedded in the bearing layer 101 of the first prefabricated wall panel 1, and the first prefabricated wall panel is further provided with a reinforcing stirrup 8, one part of the reinforcing stirrup 8 is pre-embedded in concrete of the bearing layer 101, and the other part of the reinforcing stirrup 8 is exposed out of the side end face of the bearing layer 101 to form an anchoring rib 4. The double-faced reinforcing steel bar net piece 7 is pre-embedded in the second prefabricated wall plate 2, and the bearing layer 101 concrete is exposed out of the outermost side of the double-faced reinforcing steel bar net piece 7 to form the anchoring ribs 4.
Referring to the schematic diagram 5, the gaps of the first prefabricated wall plate 1 and the second prefabricated wall plate 2 in the vertical direction are spliced to form a wall plate key groove 3, a spiral stirrup 10 is arranged in the wall plate key groove 3, and a vertical longitudinal rib 9 is arranged in a space defined by the spiral stirrup 10 and the anchoring rib 4 in a crossed manner. After filling cast-in-place concrete in the wallboard keyway 3, connecting the first prefabricated wallboard 1 and the second prefabricated wallboard 2 together. The edges of the first and second prefabricated wall panels 2 can serve as formworks, so that formworks do not need to be erected again on a construction site, the site construction amount is reduced, and the construction efficiency is improved.
The construction method of the L-shaped prefabricated wall panel connecting structure in the embodiment comprises the following steps:
s1, hoisting and positioning the first prefabricated wall plate 1, hoisting and positioning the second prefabricated wall plate 2, and splicing the C-shaped groove 5 of the second prefabricated wall plate 2 and the C-shaped groove 5 of the first prefabricated wall plate 1 relatively to form a wall plate key groove 3;
s2, inserting the first and second vertical longitudinal ribs 9 into the anchoring ribs 4 on the end faces of the first and second prefabricated wall panels 2, then rotating the spiral stirrup 10 from the top side to the bottom side of the wall panel key groove 3, and simultaneously keeping the first and second vertical longitudinal ribs 9 arranged inside the spiral stirrup 10;
and S3, pouring cast-in-place concrete into the wall plate key groove 3, and curing and forming.
Example 6
Referring to fig. 6, the prefabricated external wall panel in this embodiment sequentially includes an internal bearing layer 101, an intermediate insulating layer 102, and an external decorative layer 103. The bearing layer 101 concrete is internally anchored with double-sided reinforcing steel mesh sheets 7, and the double-sided reinforcing steel mesh sheets 7 are connected through anchoring ribs 4. The indoor side surface of bearing layer 101 intermediate position is seted up the C type breach that leads to long, and anchor muscle 4 is the anchor muscle 4 of pre-buried a plurality of horizontal directions in the precast concrete of C type recess 5 department, and anchor muscle 4 is fixed with two-sided reinforcing bar net piece 7, and partly exposes in C type recess 5.
Continuing to refer to fig. 6, the T-shaped prefabricated wall panel connection structure in this embodiment includes a first prefabricated wall panel 1 and a second prefabricated wall panel 2, where the first prefabricated wall panel 1 is an external wall panel, and includes an external decoration layer 103, an insulating layer 102, and a bearing layer 101, which are sequentially layered from the outside to the inside. The second prefabricated wall panel 2 is an interior wall panel. The surface of the bearing layer 101 of the first prefabricated wall panel 1 and the side end face of the second prefabricated wall panel 2 are provided with vertical through-length notches, and the notches are C-shaped grooves 5 in the embodiment. The grooves of the first prefabricated wall plate 1 and the second prefabricated wall plate 2 are opposite, and the two prefabricated wall plates are spliced in the horizontal direction to form a T-shaped connecting structure. Be provided with two-sided reinforcing bar net piece 7 in 1 bearing layer 101 of first prefabricated wallboard and the prefabricated wallboard 2 of second, connect through a plurality of stirrups between the two-sided reinforcing bar net piece 7, two-sided reinforcing bar net piece 7 partly exposes and forms anchor muscle 4 in C type recess 5, and the width of anchor muscle 4 does not surpass the groove edge of first or the prefabricated wallboard 2 of second.
Continuing to refer to schematic diagram 6, the notches of first prefabricated wall panel 1 and second prefabricated wall panel 2 are spliced to form wall panel key groove 3, bearing layer 101 of first prefabricated wall panel 1 and C-shaped groove 5 of second prefabricated wall panel 2 are spliced to form wall panel key groove 3, and spiral stirrups 10 are arranged in the inner space of wall panel key groove 3. The outline of spiral stirrup 10 is cylindrical in this embodiment, and the diameter of spiral stirrup 10 is greater than the width of C type recess 5 and is less than the width of wallboard keyway 3, and vertical wallboard keyway 3 that runs through of spiral stirrup 10, and spiral stirrup 10 is as high as two prefabricated wallboards. Vertical longitudinal ribs 9 are arranged in the space defined by the spiral stirrup 10 and the two anchoring ribs 4 in a crossed way. The wall plate key grooves 3 are filled with cast-in-place concrete to connect the first prefabricated wall plate 1 and the second prefabricated wall plate 2 together.
The construction method of the T-shaped prefabricated wall panel connection structure in this embodiment is basically the same as that in embodiment 5, and is not described herein again.
Example 7
Referring to fig. 7, the T-shaped prefabricated wall panel connection structure in this embodiment includes a first prefabricated wall panel 1, a second prefabricated wall panel 2, and a third prefabricated wall panel 11, wherein a vertical side end surface of the first and second prefabricated wall panels 2 is provided with a through-long step 6-shaped notch, and a vertical side end surface of the third prefabricated wall panel 11 is provided with a C-shaped groove 5. Be provided with two-sided reinforcing bar net piece 7 in the aforementioned three prefabricated wallboard, the outside reinforcing bar of reinforcing bar net piece 7 exposes from 6 form breachs of step or C type recess 5 and forms anchor muscle 4. The 6 shape gaps of the step of first and second prefabricated wallboard 2 are opposite, and the 6 edges of the step of two prefabricated wallboard meet, and the groove of third prefabricated wallboard 11 and the 6 shape gaps of the step of first and second prefabricated wallboard 2 enclose to form wallboard keyway 3. Vertical longitudinal ribs 9 are respectively arranged in the three anchoring ribs 4, spiral stirrups 10 which are equal to the three prefabricated wallboards in height are also arranged in the wallboard keyways 3, the wallboard keyways 3 are filled with cast-in-place concrete, and the first prefabricated wallboard 1, the second prefabricated wallboard 2 and the third prefabricated wallboard 11 are connected together.
The construction method of the T-shaped prefabricated wall panel connection structure in this embodiment is basically the same as that in embodiment 6, and the difference is that: s1, sequentially hoisting and positioning the first prefabricated wall panel 1 and the second prefabricated wall panel 2, and enabling the step-shaped gaps 6 of the first prefabricated wall panel and the second prefabricated wall panel to be opposite; the third prefabricated wall panel 11 is hoisted and positioned with its groove aligned with the step 6-shaped indentation of the first and second prefabricated wall panels 2.
In other embodiments, the first and second prefabricated wall panels 2 are sandwich wall panels, and comprise an outer decoration layer 103, an insulation layer 102 and a bearing layer 101, wherein the ends of the outer decoration layer 103 and the insulation layer 102 are arranged to be longer than the bearing layer 101 to form a step 6-shaped gap. When pouring concrete in T type wallboard connection structure's wallboard keyway 3 like this, need not to set up the template in the outside, simplify the construction procedure, improve the efficiency of construction.
In other improved schemes, the three prefabricated wall panels are also provided with reinforcing stirrups 8, the reinforcing stirrups 8 are closed stirrups, one part of the reinforcing stirrups is anchored in the prefabricated wall panels, and the other part of the reinforcing stirrups is exposed out of the step 6-shaped gaps or grooves on the side end faces.
Example 8
Referring to fig. 8, in this embodiment, three prefabricated wallboards form a T-shaped connection structure, including first prefabricated wallboard 1, second prefabricated wallboard 2 and third prefabricated wallboard 11, wherein first prefabricated wallboard 1, second prefabricated wallboard 2 are prefabricated exterior wall panels, and one is prefabricated interior wall panel. The prefabricated external wall panel comprises an external decoration layer 103, an insulating layer 102 and a bearing layer 101 which are sequentially connected from the outer side to the inner side, wherein the external decoration layer 103 and the insulating layer 102 are wider than the bearing layer 101 on the vertical side end surface, and a step 6-shaped gap is formed on the indoor side; and a vertical through long C-shaped groove 5 is formed in one vertical side end face of the prefabricated inner wallboard. The three prefabricated wall panels are produced by placing a plurality of reinforcing stirrups 8 on the vertical side end faces, and one ends of the reinforcing stirrups 8 are exposed from the step 6 of the bearing layer 101 or the vertical side end faces of the prefabricated inner wall panels.
Continuing to refer to fig. 8, the vertical side end faces of first prefabricated wall panel 1, second prefabricated wall panel 2 and third prefabricated wall panel 11 are enclosed, that is, the step 6-shaped notches of first prefabricated wall panel 1 and second prefabricated wall panel 2 are opposite, and then C-shaped groove 5 of third prefabricated wall panel 11 is enclosed with step 6-shaped notch at the indoor side to form wall panel key groove 3. In this embodiment, the vertical side end faces of the bearing layer 101 of the first prefabricated wall panel 1 and the second prefabricated wall panel 2 extend horizontally at the indoor side and form a reverse ridge opposite to the insulating layer 102. Set up like this, the anti-bank has acted as the partial side forms of wallboard keyway 3, avoids when pouring cast in situ concrete in wallboard keyway 3, and the concrete flows out from a large number of gaps between first prefabricated wallboard 1 and the prefabricated wallboard 11 of third, the prefabricated wallboard 2 of second and the prefabricated wallboard 11 of third, has guaranteed the closely knit degree of wallboard keyway 3 concrete. In other embodiments, if the width of the third prefabricated wall panel 11 is relatively large, the gap portions of the indoor sides of the first and second prefabricated wall panels 2 can be blocked, and a reverse sill does not need to be arranged.
Continuing to refer to fig. 8, additional stirrups 13 are also placed in wall keyway 3, and these additional stirrups 13 are similar to the stirrup ring structure consisting of 2 reinforcement stirrups 8, including 2 rectangular rings perpendicular to each other. Two ends of the Y axis of the additional stirrup 13 are respectively crossed with the reinforcing stirrups 8 extending out of the bearing layers 101 of the first prefabricated wall plate 1 and the second prefabricated wall plate 2, vertical longitudinal reinforcements 9 are inserted into the crossed space, and the additional stirrup 13 and the reinforcing stirrups 8 are constrained together; the additional stirrup 13 has one end on the X axis near the end of the reinforcing stirrup 8 of the third pre-wall panel. And a spiral stirrup 10 is arranged in the wallboard key groove 3, the spiral stirrup 10 is crossed with one end of an additional stirrup 13X shaft and a reinforcing stirrup 8 of a third prefabricated wallboard 11 at the same time, and vertical longitudinal ribs 9 are inserted into respective crossed spaces and are constrained together.
In the T-shaped wallboard connecting structure in this embodiment, three prefabricated wallboards are connected together through the reinforced concrete in the wallboard key groove 3, and the three prefabricated wallboards are reliably connected with each other through the additional stirrups 13, the vertical longitudinal bars 9 and the spiral stirrups 10 in the wallboard key groove 3. Compared with the wallboard connecting structure in the embodiment 1, the reinforcing stirrups 8 arranged on the vertical side end face of the prefabricated wallboard in the embodiment are mutually independent from the internal double-sided reinforcing mesh sheets 7, namely, the bottom reinforcing mesh sheet 7 is arranged firstly during production, then the reinforcing stirrups 8 are respectively bound with the bottom reinforcing mesh sheet 7 on the vertical side end face, and then the upper reinforcing mesh sheet 7 is placed; the reinforcement stirrup 8 plays the effect of the upper and lower reinforcing mesh piece 7 of location on the one hand, and on the other hand has strengthened the intensity of the vertical side end face concrete of prefabricated wallboard to the joint strength of three prefabricated wallboard has been improved.
The construction method in this example is substantially the same as that in example 1, except that: the additional stirrups 13 and the spiral stirrups 10 are arranged, after the first prefabricated wall panel 1 and the second prefabricated wall panel 2 are hoisted and positioned, the additional stirrups 13 are placed and the vertical longitudinal ribs 9 are inserted, so that the steel bar connection between the first prefabricated wall panel 1 and the second prefabricated wall panel 2 is realized; then hoist and mount third prefabricated wallboard 11, vertical muscle 9 that indulges is inserted respectively to the inside reinforcement stirrup 8 of reattaching stirrup 13 and third prefabricated wallboard 11 again, rotates spiral stirrup 10 from the top side to the bottom side again, keeps two vertical muscle 9 of indulging to all be located inside the bolt stirrup simultaneously.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a prefabricated wallboard, its characterized in that, vertical logical long breach has been seted up to the vertical concatenation face of prefabricated wallboard, be provided with the anchor muscle in leading to the long breach, the one end of anchor muscle pre-buried in the concrete of prefabricated wallboard, the other end is located just do not surpass in the logical long breach the outward flange of leading to the long breach.
2. The prefabricated wall panel of claim 1, further comprising an upper layer of rebar mesh, a lower layer of rebar mesh, and a marginal rebar skeleton therebetween, the marginal rebar skeleton being disposed at a vertical splice of the prefabricated wall panel, the marginal rebar skeleton including the anchoring ribs.
3. The prefabricated wall panel according to claim 1, wherein double-sided steel mesh sheets are arranged in the prefabricated wall panel, and the two double-sided steel mesh sheets are connected with each other at a position close to a vertical side end face through a plurality of anchoring ribs.
4. The prefabricated wall panel of claim 1, wherein the through-length notch is a C-shaped groove or a step-shaped notch.
5. The prefabricated wall panel according to claim 1, wherein the prefabricated wall panel is an external wall panel, and comprises an external decoration layer, an insulating layer and a bearing layer from outside to inside in sequence, and the through-length gap is formed in the bearing layer.
6. A vertical seam splicing structure of prefabricated wall panels, which is characterized by comprising the prefabricated wall panels as claimed in any one of claims 1 to 5, wherein vertical splicing surfaces of at least two prefabricated wall panels are enclosed to form a wall panel key groove, a spiral stirrup is arranged in the wall panel key groove, a vertical longitudinal rib is inserted into a space where the spiral stirrup and the anchoring rib intersect, and cast-in-place concrete is filled in the wall panel key groove to connect the prefabricated wall panels together.
7. The vertical seam splicing structure of the prefabricated wall panels as claimed in claim 6, wherein a reinforcement stirrup is further arranged at the vertical end face where the prefabricated wall panels are spliced with each other, and the tail end of the reinforcement stirrup is arranged in the gap of the vertical side end face of the prefabricated wall panel.
8. The vertical seam splicing structure of prefabricated wall panels as claimed in claim 6, wherein the spiral stirrups and vertical longitudinal ribs extend through the wall panel keyways in a vertical direction.
9. A method of assembling a vertical seam splice of prefabricated wall panels as claimed in claim 6, comprising the steps of:
s1, hoisting and positioning the first prefabricated wall board, then hoisting the second prefabricated wall board and the rest prefabricated wall boards in sequence, and horizontally splicing and enclosing the vertical side end faces of the prefabricated wall boards to form wall board key grooves;
s2, inserting and binding vertical longitudinal bars into the anchoring bars of the prefabricated wall board;
s3, rotating the spiral stirrup from the top side to the bottom side of the wallboard key groove, and simultaneously keeping the vertical longitudinal rib arranged inside the spiral stirrup;
and S4, pouring cast-in-place concrete into the key groove of the wallboard, and curing and forming.
10. The method for assembling a vertical seam splicing structure of prefabricated wall panels as claimed in claim 9, wherein the steps S1 and S2 are combined into one step: before each prefabricated wall panel is hoisted, vertical longitudinal ribs are inserted and bound and fixed inside anchoring ribs extending out of the side end face of each prefabricated wall panel, and then each prefabricated wall panel is hoisted and positioned in sequence.
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| CN113931348A (en) * | 2021-09-13 | 2022-01-14 | 北京建筑大学 | L-shaped precast concrete component and building structure |
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| CN114277958A (en) * | 2021-11-11 | 2022-04-05 | 山东艾科福建筑科技有限公司 | L-shaped shear wall assembly and building structure |
| CN114541616A (en) * | 2022-03-29 | 2022-05-27 | 郴州远大住宅工业有限公司 | Prefabricated wallboard connecting joint and construction method thereof |
| CN114703975A (en) * | 2019-03-21 | 2022-07-05 | 巴马丹拿建筑及工程师有限公司 | Connecting structure between prefabricated reinforced concrete structures and reinforcing steel bar configuration method for reinforced concrete structures |
| CN117286948A (en) * | 2023-10-11 | 2023-12-26 | 深圳市鹏翔建筑科技有限公司 | Concrete prefabricated part connection structure based on spiral ribs and construction method |
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| CN114541616A (en) * | 2022-03-29 | 2022-05-27 | 郴州远大住宅工业有限公司 | Prefabricated wallboard connecting joint and construction method thereof |
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