CN214785297U - Prefabricated double-skin wall connecting node and prefabricated double-skin wall and composite floor slab connecting structure - Google Patents

Prefabricated double-skin wall connecting node and prefabricated double-skin wall and composite floor slab connecting structure Download PDF

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Publication number
CN214785297U
CN214785297U CN202121192495.4U CN202121192495U CN214785297U CN 214785297 U CN214785297 U CN 214785297U CN 202121192495 U CN202121192495 U CN 202121192495U CN 214785297 U CN214785297 U CN 214785297U
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skin
prefabricated double
leaf
prefabricated
bars
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阙爱星
廖智强
陈甫亮
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Yuxi Zhuyou Zhizao Technology Co ltd
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Yuxi Zhuyou Zhizao Technology Co ltd
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Abstract

The utility model discloses a prefabricated two skin wall connected node and prefabricated two skin walls and coincide floor connection structure, wherein: the connecting node comprises a prefabricated double-skin wall and a vertical steel bar inserting structure, the prefabricated double-skin wall comprises an outer leaf plate, an inner leaf plate, an outer leaf steel bar net and an inner leaf steel bar net, a cavity is formed between the outer leaf plate and the inner leaf plate, a plurality of connecting bars and tie bars are connected between the outer leaf plate and the inner leaf plate, the connecting bars are respectively arranged on two inner sides of the prefabricated double-skin wall, and the tie bars are arranged inside the prefabricated double-skin wall at intervals. The utility model adopts the vertical joint bar lap joint, the construction is convenient, and the hoisting efficiency is high; the width of the vertical dowel bars is smaller than that of the cavity of the prefabricated double-skin wall, so that the vertical dowel bars can be conveniently inserted into the cavity of the wall body during field construction, and the transverse steel bars of the dowel bars are easily lapped on the U-shaped steel bars and the tie bars; the left wall body and the right wall body are connected in a close splicing mode through the spiral stirrups, a formwork does not need to be erected, no reinforcement exists in a component, construction efficiency is high, and cost is low.

Description

Prefabricated double-skin wall connecting node and prefabricated double-skin wall and composite floor slab connecting structure
Technical Field
The utility model relates to an assembly type structure technical field especially relates to a two prefabricated skin wall connected node and two prefabricated skin walls and coincide floor connection structure.
Background
With the development of society and the acceleration of urbanization, the building area of China is increasing every year. The appearance of fabricated buildings is undoubtedly another spring of the construction industry, and conforms to the beautiful vision of eighteen major propositions of building "beautiful china". Under the large environment background, the fabricated building can gradually break through the limitations in the process of the traditional house building, meanwhile, effective guarantee can be provided for the construction quality and the safety and stability of the building engineering through advanced technical means, but a lot of problems are brought to the process, the component rib production brings great problems to the production, transportation, hoisting and construction of factories, the characteristics of 'fast' of the fabricated building are violated, and the manufacturing cost is high and small. At present, the cost reduction is mainly divided into two types, namely: the PC amount is reduced, the number of prefabricated parts is reduced, the field operation is performed as much as possible, and the cost is reduced; secondly, the method comprises the following steps: no rib is produced, the field construction is accelerated, and the cost is reduced. At present, the combination of the two methods does not achieve the maximum cost reduction, so a novel technology is needed to solve the problem, which is the key point for guaranteeing the efficiency and quality of the fabricated building and reducing the cost.
At present about prefabricated double skin wall connected node of assembled, for example the utility model discloses a vertical dowel structure of cavity shear force wall and connection structure thereof is granted the notice number and is CN211973976U, wherein includes: the reinforcing steel bar cage is fixedly connected with the first leaf plate and the second leaf plate; the vertical steel bars and a part of the ladder bars and the reinforcing lacing wires are embedded in the first leaf plate and the second leaf plate; and one part of the embedded joint bar extends into a cavity formed by the first leaf plate and the second leaf plate and is fixedly connected with a tie bar and a reinforcing tie bar in the ladder bar. The method reduces the amount of PC, increases the cast-in-place amount, reduces the cost, reduces the frame hitting during the hoisting of the upper wall body and the lower wall body by adopting the vertical dowel bars, and shortens the construction period. But this scheme need stretch into in the cavity that first page or leaf board and second page or leaf board formed when the mill is prefabricated partly of pre-buried dowel to with lacing wire and the reinforcing lacing wire fixed connection in the ladder muscle, this just makes the mill preparation more troublesome, in addition the transportation because play muscle, vertical dowel is very easy to be out of shape, vertical dowel is difficult to insert upper portion wall body during upper and lower wall body hoist and mount, the construction difficulty influences the time limit for a project, and this scheme has also only been solved last and has been gone out the muscle problem about, but the wall goes out the muscle problem and does not solve about, so to sum up, need research and develop a prefabricated double skin wall connected node and solve the technical problem that exists among the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a prefabricated double skin wall connected node to solve the problem that proposes in the background art.
In order to achieve the purpose, the utility model provides a prefabricated double-skin wall connecting node, including prefabricated double-skin wall and the vertical dowel bar structure of bottom insertion in the cavity of prefabricated double-skin wall, prefabricated double-skin wall includes outer leaf plate, inner leaf plate, the outer leaf reinforcing bar net that sets up in the outer leaf plate, the inner leaf reinforcing bar net that sets up in the inner leaf plate, form the cavity between outer leaf plate and the inner leaf plate, be connected with a plurality of splice bars and a plurality of lacing wires between outer leaf plate and the inner leaf plate, a plurality of splice bars set up respectively in prefabricated double-skin wall inside both sides, a plurality of lacing wires interval arrangement is in prefabricated double-skin wall inside; the connecting ribs and the pulling ribs are fixedly connected with the outer leaf reinforcing mesh and the inner leaf reinforcing mesh respectively; the width of the vertical dowel bar structure is smaller than that of the cavity of the prefabricated double-skin wall, and the lower end of the vertical dowel bar structure is fixedly connected with the connecting ribs and the tie bars at the top of the prefabricated double-skin wall.
Furthermore, the number of the prefabricated double-skin walls is at least two, at least two prefabricated double-skin walls are arranged on the left and right sides, the prefabricated double-skin walls also comprise spiral stirrups for splicing the two adjacent prefabricated double-skin walls on the left and right sides, and the connecting reinforcements on the two sides of the inner parts of the prefabricated double-skin walls are symmetrically arranged inwards; and the spiral stirrup is screwed into the connecting rib of the left prefabricated double-skin wall and the right prefabricated double-skin wall.
Furthermore, vertical dowel structure includes two horizontal dowels and a plurality of vertical dowel of vertical setting, and is a plurality of vertical dowel sets up respectively in two the outside of horizontal dowel, horizontal dowel and vertical dowel tie.
Furthermore, the splice bar is the U type reinforcing bar that includes bottom muscle portion and two side muscle portions, two side muscle portion connect respectively in the both ends of bottom muscle portion, the both ends of bottom muscle portion run through respectively outer leaf reinforcing bar net and inner leaf reinforcing bar net set up, two side muscle portion respectively fixed set up in the outside of outer leaf reinforcing bar net and inner leaf reinforcing bar net.
Furthermore, the connecting rib openings on the two sides of the interior of the prefabricated double-skin wall are symmetrically arranged inwards.
Furthermore, the lacing wire is Z-shaped and comprises a first transverse rib part, a second transverse rib part and a longitudinal rib part, wherein the first transverse rib part and the second transverse rib part are arranged in parallel and are respectively connected to different sides of two ends of the longitudinal rib part; the two ends of the longitudinal rib part penetrate through the outer leaf reinforcing mesh and the inner leaf reinforcing mesh respectively, and the first transverse rib part and the second transverse rib part are fixedly arranged on the outer sides of the outer leaf reinforcing mesh and the inner leaf reinforcing mesh respectively.
Furthermore, the outer leaf reinforcing mesh and the inner leaf reinforcing mesh are reinforcing meshes formed by binding transverse reinforcing steel bars and longitudinal reinforcing steel bars; the longitudinal steel bars are arranged along the height direction of the prefabricated double-skin wall, and one end of the longitudinal steel bars in the height direction leaks out of the prefabricated double-skin wall; the transverse reinforcing steel bars are arranged in the width direction of the prefabricated double-skin wall, and the two ends of the length direction of the transverse reinforcing steel bars are arranged on the inner portion of the prefabricated double-skin wall and are not exposed.
The utility model also provides a connecting structure of the prefabricated double-skin wall and the composite floor slab, which comprises the composite floor slab and the prefabricated double-skin wall connecting node; the composite floor slab comprises a prefabricated layer at the bottom and a cast-in-place layer at the upper part; one end overlap joint on prefabricated layer in the top of prefabricated double-skin wall, cast in situ concrete cover in prefabricated layer top forms cast in situ layer and fills inside the cavity of prefabricated double-skin wall, cast in situ concrete connects coincide floor and prefabricated double-skin wall.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses a prefabricated double-skin wall connected node, including at least one prefabricated double-skin wall and the vertical dowel bar structure of bottom insertion in the prefabricated double-skin wall cavity, adopt vertical dowel bar overlap joint, construction convenience, hoist and mount efficiency is high; the width of the vertical dowel bars is smaller than the width of the cavity of the prefabricated double-skin wall, the vertical dowel bars are conveniently inserted into the cavity of the prefabricated double-skin wall body during field construction, and the transverse steel bars of the dowel bars are easily lapped on the U-shaped steel bars and the tie bars. The left wall body and the right wall body are connected in a close splicing mode through the spiral stirrups, a formwork does not need to be erected, no reinforcement exists in a component, construction efficiency is high, and cost is low.
(2) The utility model discloses a prefabricated double-skin wall and composite floor slab connecting structure, which comprises a bottom prefabricated layer and an upper cast-in-place layer; one end of the prefabricated layer is lapped on the top end of the prefabricated double-skin wall, cast-in-place concrete is covered on the prefabricated layer to form a cast-in-place layer and is filled into the cavity of the prefabricated double-skin wall, and the cast-in-place concrete is connected with the composite floor slab and the prefabricated double-skin wall; the connecting structure is simple in structure and high in construction efficiency, and production cost is effectively reduced.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a schematic structural view of a prefabricated double-skin wall of the present invention;
FIG. 2 is a schematic structural view of the present invention showing the vertical joint bars;
FIG. 3 is a schematic structural view of the present invention for placing the spiral stirrup;
FIG. 4 is a schematic structural view of the middle-left prefabricated double-skin wall and the right prefabricated double-skin wall of the present invention in a close-splicing manner (i.e. connected by spiral stirrups);
FIG. 5 is a schematic view of the installation of the lower prefabricated double-skin wall and the upper prefabricated double-skin wall;
the prefabricated double-skin wall comprises 1-outer leaf plates, 2-inner leaf plates, 3-outer leaf reinforcing mesh, 4-inner leaf reinforcing mesh, 5-U-shaped reinforcing steel bars, 6-tie bars, 7-transverse steel bars, 8-longitudinal steel bars, 9-spiral hoop bars, A-prefabricated double-skin walls, B-vertical steel bar inserting structures and C-laminated floor slabs.
Detailed Description
The embodiments of the invention will be described in detail hereinafter with reference to the accompanying drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Referring to fig. 1 and 2, the embodiment provides a prefabricated double-skin wall connection node, which includes a prefabricated double-skin wall a and a vertical steel bar inserting structure B, the prefabricated double-skin wall includes an outer leaf plate 1 and an inner leaf plate 2, a cavity is formed between the outer leaf plate 1 and the inner leaf plate 2, an outer leaf steel bar net 3 is arranged inside the outer leaf plate 1, an inner leaf steel bar net 4 is arranged inside the inner leaf plate 2, the outer leaf steel bar net 3 and the inner leaf steel bar net 4 are formed by welding a plurality of transverse steel bars and a plurality of longitudinal steel bars, the longitudinal steel bars are arranged along the height direction of the prefabricated double-skin wall, and the transverse steel bars are arranged along the width direction of the prefabricated double-skin wall. A plurality of connecting ribs 5 and tie bars 6 are connected between the outer blade plate 1 and the inner blade plate 2, the connecting ribs 5 are respectively arranged on two inner sides of the prefabricated double-skin wall, the connecting ribs 5 positioned on the two inner sides of the prefabricated double-skin wall are arranged at intervals along the height direction of the prefabricated double-skin wall, and the tie bars 6 are arranged at intervals inside the prefabricated double-skin wall; and the connecting ribs 5 and the tie bars 6 are respectively bound and connected with the outer leaf reinforcing mesh 3 and the inner leaf reinforcing mesh 4, and the connecting ribs 5 and the tie bars 6 are arranged inside the prefabricated double-skin wall and are not exposed. The vertical dowel structure comprises two transverse dowel bars 7 and a plurality of vertical dowel bars 8 which are vertically arranged, the plurality of vertical dowel bars 8 are respectively arranged on the outer sides of the two transverse dowel bars 7, and the transverse dowel bars 7 and the vertical dowel bars 8 are connected in a binding mode. The width of the vertical dowel bars is smaller than the width of the cavity of the prefabricated double-skin wall, the vertical dowel bar structure is conveniently inserted into the cavity of the wall during field construction, and the transverse steel bars of the vertical dowel bar structure can be easily overlapped on the connecting bars 5 and the tie bars 6.
Referring to fig. 3 and 4, the connection node of the present embodiment includes, in addition to at least two prefabricated double-skin walls arranged left and right, a spiral stirrup 9 for splicing the two adjacent prefabricated double-skin walls left and right; in the structure, the connecting ribs 5 are U-shaped reinforcing steel bars, and two groups of connecting ribs 5(a plurality of connecting ribs 5 positioned on the same side of the prefabricated double-skin wall are a group) positioned at two sides of the inner part of the prefabricated double-skin wall are symmetrically arranged with openings facing inwards; the spiral stirrup 9 is screwed into the connecting rib 5 of the left prefabricated double-skin wall and the right prefabricated double-skin wall. Specifically, two groups of connecting ribs 5 in the prefabricated double-skin wall are oppositely arranged in an opening manner, and the arrangement facilitates the close splicing connection of the adjacent left and right prefabricated double-skin walls; after the hoisting of the adjacent left and right prefabricated wall bodies is finished, the spiral stirrups 9 are adopted, so that the spiral stirrups are screwed into the two groups of connecting ribs which are close to the left and right wall bodies; the construction is simple and convenient, and the installation efficiency is high.
In the preferred embodiment of the present invention, the connecting rib 5 comprises a bottom rib portion and two side rib portions, the two side rib portions are respectively connected to two ends of the bottom rib portion, two ends of the bottom rib portion respectively extend through the outer leaf mesh reinforcement 3 and the inner leaf mesh reinforcement 4, and the two side rib portions are respectively fixedly disposed outside the outer leaf mesh reinforcement 3 and the inner leaf mesh reinforcement 4 and fixedly connected with the longitudinal strands by means of binding. The lacing wire 6 is of a Z-shaped structure and comprises a first transverse rib part, a second transverse rib part and a longitudinal rib part, wherein the first transverse rib part and the second transverse rib part are arranged in parallel and are respectively connected to the different sides of the two ends of the longitudinal rib part; the two ends of the longitudinal rib part respectively penetrate through the outer leaf reinforcing mesh 3 and the inner leaf reinforcing mesh 4, namely the first transverse rib part and the second transverse rib part are respectively fixedly arranged at the outer sides of the outer leaf reinforcing mesh 3 and the inner leaf reinforcing mesh 4, and the first transverse rib part and the second transverse rib part are respectively fixedly connected with the longitudinal reinforcing bars of the outer leaf reinforcing mesh 3 and the inner leaf reinforcing mesh 4 in a binding mode. The prefabricated double-skin wall with the structure is simple to manufacture and low in cost.
In the preferred embodiment of the present invention, both ends of the transverse bars of the outer leaf reinforcing mesh 3 and the inner leaf reinforcing mesh 4 are disposed inside the prefabricated double-skin wall and are not exposed, and one end of the longitudinal bar is exposed from the prefabricated double-skin wall. Specifically, half of the longitudinal steel bars of the inner leaf steel bar mesh and the outer leaf steel bar mesh need to be exposed outside, and when the construction is carried out on site, the longitudinal steel bars and newly poured concrete are anchored together; the structure sets up rationally, construction convenience.
The utility model discloses in the embodiment of the preferred, vertical dowel structure B includes two horizontal dowels 7 and a plurality of vertical dowels 8 of vertical setting, and a plurality of vertical dowels 8 set up respectively in the outside of two horizontal dowels 7, and horizontal dowels 7 and vertical dowels 8 tie-in.
The utility model also provides a connecting structure of the prefabricated double-skin wall and the composite floor slab, which comprises a composite floor slab C and the prefabricated double-skin wall connecting node in the embodiment; the laminated floor slab comprises a prefabricated layer at the bottom and a cast-in-place layer at the upper part; one end overlap joint in the top of prefabricated double-skin wall on prefabricated layer, cast in situ concrete cover form cast in situ layer and fill inside the cavity of prefabricated double-skin wall above prefabricated layer, cast in situ concrete connects coincide floor and prefabricated double-skin wall. The connecting structure is simple in structure and high in construction efficiency, and production cost is effectively reduced.
The utility model discloses a process of prefabricated double skin wall and coincide floor field installation (connection) roughly includes following step:
1. placing vertical dowel bars: the vertical joint bars which are bound are directly inserted into the cavities of the prefabricated double-skin walls, and two transverse joint bars of the vertical joint bar structure are placed on the U-shaped steel bars and the tie bars at the tops of the prefabricated double-skin walls to complete connection.
2. Placing a spiral stirrup: after the left and right prefabricated double-skin walls are hoisted, the spiral stirrups 9 are adopted and screwed into the U-shaped steel bars of the left and right prefabricated double-skin walls, so that the close splicing connection of the left prefabricated double-skin wall and the right prefabricated double-skin wall is completed.
3. And hoisting the composite floor slab to the position above the prefabricated double-skin wall after close splicing is completed, overlapping the bottom end of the prefabricated layer of the composite floor slab on the top end of the prefabricated double-skin wall, covering the prefabricated layer with cast-in-place concrete to form a cast-in-place layer, filling the cast-in-place concrete into the cavity of the prefabricated double-skin wall, and hoisting the upper wall body after the strength is reached.
Please refer to fig. 5 in combination, wherein fig. 5(a) is a schematic diagram of the hoisting cooperation between the upper layer of prefabricated double-skin wall and the lower layer of prefabricated double-skin wall; FIG. b is a schematic diagram of the upper layer of prefabricated double-skin wall and the lower layer of prefabricated double-skin wall after being installed in place; the figure specifically shows the process of hoisting and installing the upper double-skin wall after the next layer of prefabricated double-skin wall A is manufactured.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The prefabricated double-skin wall connecting joint is characterized by comprising a prefabricated double-skin wall (A) and a vertical steel bar inserting structure (B) with the bottom inserted into a cavity of the prefabricated double-skin wall, wherein the prefabricated double-skin wall comprises an outer leaf plate (1), an inner leaf plate (2), an outer leaf steel bar net (3) arranged inside the outer leaf plate (1) and an inner leaf steel bar net (4) arranged inside the inner leaf plate (2), a cavity is formed between the outer leaf plate (1) and the inner leaf plate (2), a plurality of connecting bars (5) and a plurality of tie bars (6) are connected between the outer leaf plate (1) and the inner leaf plate (2), the connecting bars (5) are respectively arranged on two sides of the inside of the prefabricated double-skin wall, and the tie bars (6) are arranged inside the prefabricated double-skin wall at intervals; the connecting ribs (5) and the pulling ribs (6) are respectively fixedly connected with the outer leaf reinforcing mesh (3) and the inner leaf reinforcing mesh (4); the width of the vertical dowel bar structure is smaller than that of the cavity of the prefabricated double-skin wall, and the lower end of the vertical dowel bar structure is fixedly connected with the connecting ribs (5) and the tie bars (6) at the top of the prefabricated double-skin wall.
2. The prefabricated double-skin wall connecting node as claimed in claim 1, wherein the number of the prefabricated double-skin walls is at least two, at least two prefabricated double-skin walls are arranged left and right, the prefabricated double-skin wall connecting node further comprises spiral stirrups (9) for closely splicing two adjacent prefabricated double-skin walls left and right, and the connecting ribs (5) on two sides of the inner part of each prefabricated double-skin wall are symmetrically arranged with openings facing inwards; and the spiral stirrup (9) is screwed into the connecting rib (5) of the left prefabricated double-skin wall and the right prefabricated double-skin wall.
3. The prefabricated double-skin wall connecting node as claimed in claim 1 or 2, wherein the vertical steel bar inserting structure (B) comprises two transverse steel bars (7) and a plurality of vertically arranged longitudinal steel bars (8), the plurality of longitudinal steel bars (8) are respectively arranged at the outer sides of the two transverse steel bars (7), and the transverse steel bars (7) and the longitudinal steel bars (8) are connected in a bundling manner.
4. The prefabricated double skin wall connection node according to claim 1 or 2, wherein said connection rib (5) is a U-shaped steel bar comprising a base rib portion and two side rib portions, said two side rib portions are respectively connected to two ends of said base rib portion, two ends of said base rib portion are respectively disposed through said outer leaf reinforcement mesh (3) and said inner leaf reinforcement mesh (4), and two side rib portions are respectively fixedly disposed at outer sides of said outer leaf reinforcement mesh (3) and said inner leaf reinforcement mesh (4).
5. Prefabricated double-skin wall connecting node according to claim 4, characterized in that the connecting ribs (5) on both sides of the interior of the prefabricated double-skin wall are symmetrically arranged inwards.
6. The prefabricated double-skin wall connecting joint according to claim 1 or 2, wherein the tie bar (6) is Z-shaped and comprises a first transverse bar part, a second transverse bar part and a longitudinal bar part, and the first transverse bar part and the second transverse bar part are arranged in parallel and are respectively connected to the opposite sides of the two ends of the longitudinal bar part; the two ends of the longitudinal bar part penetrate through the outer leaf reinforcing mesh (3) and the inner leaf reinforcing mesh (4) respectively, and the first transverse bar part and the second transverse bar part are fixedly arranged on the outer sides of the outer leaf reinforcing mesh (3) and the inner leaf reinforcing mesh (4) respectively.
7. The prefabricated double skin wall connection node according to claim 1 or 2, wherein said outer leaf reinforcing mesh (3) and said inner leaf reinforcing mesh (4) are each a reinforcing mesh formed by binding transverse reinforcing bars and longitudinal reinforcing bars; the longitudinal steel bars are arranged along the height direction of the prefabricated double-skin wall, and one end of the longitudinal steel bars in the height direction leaks out of the prefabricated double-skin wall; the transverse reinforcing steel bars are arranged in the width direction of the prefabricated double-skin wall, and the two ends of the length direction of the transverse reinforcing steel bars are arranged on the inner portion of the prefabricated double-skin wall and are not exposed.
8. A prefabricated double-skin wall and composite floor slab connection structure, comprising a composite floor slab (C) and a prefabricated double-skin wall connection node according to any one of claims 1 to 7; the composite floor slab comprises a prefabricated layer at the bottom and a cast-in-place layer at the upper part; one end overlap joint on prefabricated layer in the top of prefabricated double-skin wall, cast in situ concrete cover in prefabricated layer top forms cast in situ layer and fills inside the cavity of prefabricated double-skin wall, cast in situ concrete connects coincide floor and prefabricated double-skin wall.
CN202121192495.4U 2021-05-31 2021-05-31 Prefabricated double-skin wall connecting node and prefabricated double-skin wall and composite floor slab connecting structure Active CN214785297U (en)

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Application Number Priority Date Filing Date Title
CN202121192495.4U CN214785297U (en) 2021-05-31 2021-05-31 Prefabricated double-skin wall connecting node and prefabricated double-skin wall and composite floor slab connecting structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121192495.4U CN214785297U (en) 2021-05-31 2021-05-31 Prefabricated double-skin wall connecting node and prefabricated double-skin wall and composite floor slab connecting structure

Publications (1)

Publication Number Publication Date
CN214785297U true CN214785297U (en) 2021-11-19

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