CN208441459U - Upper and lower two-layer support auxiliary structure and construction building structure - Google Patents
Upper and lower two-layer support auxiliary structure and construction building structure Download PDFInfo
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- CN208441459U CN208441459U CN201820716166.7U CN201820716166U CN208441459U CN 208441459 U CN208441459 U CN 208441459U CN 201820716166 U CN201820716166 U CN 201820716166U CN 208441459 U CN208441459 U CN 208441459U
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- 238000010276 construction Methods 0.000 title claims abstract description 29
- 238000007789 sealing Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 238000009415 formwork Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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Abstract
The utility model provides an upper and lower two-layer support auxiliary structure and construction building structure relates to construction auxiliary assembly technical field, the utility model provides an upper and lower two-layer support auxiliary structure includes upper cartridge subassembly, lower floor's cartridge subassembly and a plurality of bracing piece, wherein: the upper-layer plug-in assembly comprises an upper-layer plug-in screw rod which is used for being plugged in the upper-layer upright rod; the lower-layer plug-in component comprises a lower-layer plug-in screw rod which is used for being plugged in the lower-layer upright rod; the both ends of bracing piece are connected with upper cartridge subassembly and lower floor cartridge subassembly respectively to it has the space that is used for the floor construction to make between upper cartridge subassembly and the lower floor cartridge subassembly. The lower floor pole setting can directly fix, support the upper strata pole setting through two-layer support auxiliary structure about above-mentioned, need not wait to carry out the setting up of upper strata support frame again after the concrete reaches sufficient intensity, and every layer of time limit for a project can shorten two to three days.
Description
Technical field
The utility model relates to construction auxiliary equipment technical fields, support supplementary structure more particularly, to a kind of upper layer and lower layer
And construction building structure.
Background technique
It needs to be used cooperatively using jacking with upright bar and scaffold in the construction process, jacking plays tune in the process
Save the height of scaffold and pipe support, balanced support weight, load-bearing effect.
During traditional construction, before upper layer foot prop upright bar is set up, need first to carry out pouring for lower-layer concrete floor,
And it just can be carried out installing for upper layer upright bar after needing that floorslab concrete is waited to reach sufficient intensity, and complete applying for upper layer floor
Work, in the process, every one layer of construction require to wait at least two to the three days time that concrete is waited to reach intensity, high degree
On extend the duration.
Therefore, the upper layer and lower layer support supplementary structure construction building structure that how providing one kind can shorten the construction period is ability
One of field technique personnel technical problem to be solved.
Utility model content
The purpose of this utility model is to provide a kind of upper layer and lower layer support supplementary structure and construction building structures, can make
It obtains the directly stable upper layer of standing on of upright bar to insert on component, needs not wait for after concrete reaches enough intensity and carry out upper layer again
Support frame is set up, and every layer of duration can shorten two to three days.
To achieve the above object, the utility model the following technical schemes are provided:
This is in a first aspect, utility model provides a kind of upper layer and lower layer support supplementary structure, including upper layer inserts component, lower layer
Insert component and multiple support rods, in which:
The upper layer inserting component includes upper layer inserting screw rod, and the upper layer inserting screw rod is for being inserted into upper layer upright bar
In；
Lower layer's inserting component includes lower layer's inserting screw rod, and lower layer's inserting screw rod is for being inserted into lower layer's upright bar
In；
The both ends of the support rod insert component with the upper layer respectively and lower layer inserting component is connect, so that described
Upper layer inserts the space having between component and lower layer inserting component for floor slab construction.
Further, the upper layer inserting component further includes the upper layer connecting plate connecting with multiple support rods, described
Upper layer inserts screw rod and is set on the upper layer connecting plate.
Further, lower layer's inserting component further includes the lower layer's connecting plate connecting with multiple support rods, described
Lower layer inserts screw rod and is set on lower layer's connecting plate.
Further, the upper layer inserting component and lower layer inserting component are oppositely arranged.
Further, the support rod be bolt, the support rod by nut respectively with the upper layer insert component and
Lower layer's inserting component connection.
Further, the support rod is four.
Further, the outer cover of the support rod is equipped with the tube body for separating the support rod and the floor.
Further, the tube body is pvc pipe.
Further, the support rod is equipped with sealing piece.
Second aspect, the utility model also provide a kind of construction building structure, including any described in first aspect
Upper layer and lower layer support supplementary structure.
Upper layer and lower layer provided by the utility model support supplementary structure and construction building structure can generate it is following the utility model has the advantages that
When stating upper layer and lower layer support supplementary structure in use, lower layer's inserting component is connect with multiple support rods first,
Then lower layer's inserting screw rod is inserted into lower layer's upright bar, so that lower layer's upright bar can insert component and multiple supports to lower layer
Bar is supported, and is then carried out the formwork work of the storey floors, including formwork erection and reinforcing bar binding, is then inserted upper layer
Component is connect with multiple support rods, and finally upper layer upright bar is inserted on upper layer inserting screw rod, lower layer's upright bar is passed through
Above-mentioned apparatus is directly fixed upper layer upright bar, supports.
In the upper layer and lower layer support supplementary structure that the utility model first aspect provides, since lower layer's upright bar is inserted into lower layer
It inserts on lower layer's inserting screw rod in component, so that lower layer's inserting component is fixed relative to the position of lower layer's upright bar, lower layer's upright bar
Also component can be inserted to lower layer to be supported.Since the upper layer that upper layer upright bar is inserted into upper layer inserting component inserts screw rod
On, so that upper layer upright bar is fixed relative to the position of upper layer inserting component, upper layer inserting component can also be carried out upper layer upright bar
Support.For compared with the existing technology, lower layer's upright bar can lead in upper layer and lower layer support supplementary structure provided by the utility model
It crosses above-mentioned upper layer and lower layer support supplementary structure directly upper layer upright bar is fixed, supports, each layer of support construction is connected
Get up, supported layer by layer, upper layer load is directly passed to underlying support structure, needs not wait for concrete and reach enough
Setting up for upper layer support frame is carried out after intensity again, every layer of duration can shorten two to three days.
The construction building structure that the utility model second aspect provides has up and down two that the utility model first aspect provides
Layer support supplementary structure, thus one possessed by the upper layer and lower layer support supplementary structure provided with the utility model first aspect
Cut beneficial effect.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the sectional view that upper layer and lower layer provided by the embodiment of the utility model support supplementary structure；
Fig. 2 is the top view that upper layer and lower layer provided by the embodiment of the utility model support supplementary structure；
Fig. 3 is the sectional view of construction building structure provided by the embodiment of the utility model.
Icon: the upper layer 1- inserts component；The upper layer 11- inserts screw rod；The upper layer 12- connecting plate；2- lower layer inserts component；
21- lower layer inserts screw rod；22- lower layer connecting plate；3- support rod；31- tube body；The upright bar of the upper layer 4-；The upright bar of 5- lower layer；
6- floor.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
Specific embodiment of the present utility model is described in detail below in conjunction with attached drawing.It should be understood that herein
Described specific embodiment is only used for describing and explaining the present invention, and is not intended to limit the utility model.
Fig. 1 is the sectional view that upper layer and lower layer provided by the embodiment of the utility model support supplementary structure；Fig. 2 is that this is practical new
The top view for the upper layer and lower layer support supplementary structure that type embodiment provides；Fig. 3 is that construction provided by the embodiment of the utility model is built
The sectional view of building structure.
The embodiment of the utility model first aspect provides a kind of upper layer and lower layer support supplementary structure, such as Fig. 1 and Fig. 2 institute
Show, including upper layer inserting component 1, lower layer's inserting component 2 and multiple support rods 3, in which:
It includes that upper layer inserts screw rod 11 that upper layer, which inserts component 1, and upper layer inserting screw rod 11 is for being inserted into upper layer upright bar 4；
It includes that lower layer inserts screw rod 21 that lower layer, which inserts component 2, and lower layer's inserting screw rod 21 is for being inserted into lower layer's upright bar 5；
The both ends of support rod 3 insert component 1 with upper layer respectively and lower layer's inserting component 2 is connect, so that upper layer inserts component 1
There is the space for floor slab construction between lower layer's inserting component 2.
When stating upper layer and lower layer support supplementary structure in use, lower layer's inserting component is connect with multiple support rods first,
Then lower layer's inserting screw rod is inserted into lower layer's upright bar, so that lower layer's upright bar can insert component and multiple supports to lower layer
Bar is supported, and is then carried out the formwork work of the storey floors, including formwork erection and reinforcing bar binding, is then inserted upper layer
Component is connect with multiple support rods, and finally upper layer upright bar is inserted on upper layer inserting screw rod, lower layer's upright bar is passed through
Above-mentioned apparatus is directly fixed upper layer upright bar, supports.
In the upper layer and lower layer support supplementary structure that the embodiment of the utility model first aspect provides, since lower layer's upright bar is inserted
On lower layer's inserting screw rod in lower layer's inserting component, so that lower layer's inserting component is fixed relative to the position of lower layer's upright bar,
Lower layer's upright bar also can insert component to lower layer and be supported.Since the upper layer that upper layer upright bar is inserted into upper layer inserting component is inserted
On loading screw, so that upper layer upright bar is fixed relative to the position of upper layer inserting component, upper layer inserts component also can be vertical to upper layer
Bar is supported.For compared with the existing technology, lower layer's upright bar in upper layer and lower layer support supplementary structure provided by the utility model
Supplementary structure can be supported directly to be fixed, support to upper layer upright bar by above-mentioned upper layer and lower layer, by each layer of support knot
Structure connects, and is supported layer by layer, and upper layer load is directly passed to underlying support structure, concrete is needed not wait for and reaches
Setting up for upper layer support frame is carried out after enough intensity again, every layer of duration can shorten two to three days.
The upper layer and lower layer support supplementary structure that the embodiment of the utility model first aspect provides instead of traditional jacking,
It inserts screw rod 11 at the middle and upper levels and lower layer's inserting screw rod 21 is equipped with conduit saddle, and conduit saddle is used to and upper layer upright bar 4 or lower layer's upright bar 5
It is attached, while also being used to adjust the height of upper layer upright bar 4 or lower layer's upright bar 5, the conduit saddle in structure and traditional jacking
Structure is identical, and in order to save space, in this not go into detail.
In some embodiments, as depicted in figs. 1 and 2, in order to enable lower layer's inserting component 2 passes through multiple support rods 3 more
Stablize and upper layer inserting component 1 is supported, it further includes the upper layer connecting plate connecting with multiple support rods 3 that upper layer, which inserts component 1,
12, upper layer inserts screw rod 11 and is set on upper layer connecting plate 12.Upper layer connecting plate 12 is capable of providing bigger connection area, so that on
More support rods 3 can be connected between layer inserting component 1 and lower layer's inserting component 2, guarantee that upper layer connecting plate 12 can be stablized
Support upper layer upright bar 4.
In at least one embodiment, as shown in Fig. 2, upper layer connecting plate 12 is in cuboid plate structure, or in pros
Body plate structure, upper layer connecting plate 12 are equipped with and are used to support the through-hole that bar 3 passes through.
In order to enable upper layer connecting plate 12 has preferable intensity, upper layer connecting plate 12 is steel plate.Upper layer inserts screw rod 11
It is welded on upper layer connecting plate 12, upper layer inserting screw rod 11 is firmly connect with upper layer connecting plate 12.
Upper layer connecting plate 12 using 8-12mm thickness steel plate, specifically, upper layer connecting plate 12 can use 8mm, 9mm,
The steel plate of 10mm, 11mm, 12mm thickness, at least one embodiment, upper layer connecting plate 12 use the steel plate of 10mm thickness.
In some embodiments, as shown in Figure 1, in order to enable lower layer's inserting component 2 is more stable right by multiple support rods 3
Upper layer inserting component 1 is supported, and it further includes the lower layer's connecting plate 22 connecting with multiple support rods 3, lower layer that lower layer, which inserts component 2,
Screw rod 21 is inserted to be set on lower layer's connecting plate 22.Lower layer's connecting plate 22 is capable of providing bigger connection area, so that upper layer inserts
More support rods 3 can be connected between component 1 and lower layer's inserting component 2, guarantee the support that lower layer's inserting component 2 can be stable
Upper layer inserts component 1.
In at least one embodiment, lower layer's connecting plate 22 is in cuboid plate structure, or is in square plate structure,
Lower layer's connecting plate 22 is equipped with and is used to support the through-hole that bar 3 passes through.
In order to enable lower layer's connecting plate 22 has preferable intensity, lower layer's connecting plate 22 is steel plate.Lower layer inserts screw rod 21
It is welded on lower layer's connecting plate 22, lower layer's inserting screw rod 21 is firmly connect with lower layer connecting plate 22.
Lower layer's connecting plate 22 using 8-12mm thickness steel plate, specifically, lower layer's connecting plate 22 can use 8mm, 9mm,
The steel plate of 10mm, 11mm, 12mm thickness, at least one embodiment, lower layer's connecting plate 22 use the steel plate of 10mm thickness.
In some embodiments, as shown in Figure 1, in order to enable above-mentioned upper layer and lower layer support the structure of supplementary structure more
Stablize, upper layer inserting component 1 and lower layer's inserting component 2 are oppositely arranged.
Above-mentioned upper layer and lower layer support supplementary structure may include the support rods 3 such as two, three, four, five, including multiple
Support rod 3 can make lower layer's inserting component 2 preferably be supported to upper layer inserting component 1.
In some embodiments, as shown in Fig. 2, in order to enable support rod 3 can adequately to upper layer insert component 1 and
Upper layer upright bar 4 on upper layer inserting component 1 is supported, and support rod 3 is four.When upper layer connecting plate 12 is in cuboid plate knot
Structure, or be in square plate structure when, four support rods 3 are respectively connect with one jiao of upper layer connecting plate 12；When lower layer's connecting plate
22 be in cuboid plate structure, or when being in square plate structure, four support rods 3 respectively with one jiao of company of lower layer connecting plate 22
It connects.Four support rods 3 can give upper layer connecting plate 12 1 enough support forces, guarantee the stabilization of upper layer connecting plate 12, from
And enable upper layer upright bar 4 is stable to be set on upper layer inserting screw rod 11.
In some embodiments, in order to facilitate support rod 3 and upper layer connecting plate 12, support rod 3 and lower layer's connecting plate 22 it
Between connection, support rod 3 is bolt, and support rod 3, which by nut inserts component 1 and lower layer with upper layer respectively and inserts component 2, to be connect.
Above-mentioned connection type connection procedure is simple, and the disassembly of support rod 3 is also very convenient.
In order to enable support rod 3 can effectively be supported upper layer inserting component 1, support rod 3 can use 28-
32mm bolt, specifically, support rod 3 can use the bolt of 28mm, 29mm, 30mm, 31mm, 32mm, at least one implementation
In example, support rod 3 uses the bolt of 30mm.
Specifically, as shown in Figure 1, during installation, the direction of support rod 3 from the bottom to top is penetrated lower layer's connecting plate 22 first
On, then support rod 3 is locked on lower layer's connecting plate 22 using a nut, is extremely propped up when needing to install upper layer connecting plate 12
When on strut 3, a nut is first screwed on support rod 3, is then passed through the top of support rod 3 logical on upper layer connecting plate 12
Upper layer connecting plate 12 is finally locked on support rod 3 using a nut by hole.
In some embodiments, in order to facilitate the disassembly of support rod 3, as shown in figures 1 and 3, the outside of support rod 3 is arranged
There is the tube body 31 for separating support rod 3 and floor 6.
It should be noted that as shown in figure 3, floor includes double steel pipe, flitch layer, plank sheathing layer and roof boarding layer.Double steel
Pipe is set on lower layer's connecting plate 22, is successively laid with flitch layer, plank sheathing layer and roof boarding layer then along direction from the bottom to top,
Its structure is identical as traditional floor construction.Wherein, casting concrete is wanted in roof boarding layer.The outer cover of support rod 3 is equipped with pipe
Support rod 3 and floor 6 can be separated after body 31, so that concrete will not be connect with support rod 3 after casting concrete, are convenient for
The disassembly of support rod 3.
When constructing to multi-storey building, one above-mentioned upper layer and lower layer branch of each layer of setting between one to three layer is needed
Supplementary structure is supportted, when needing to continue to construct to four layers, the concrete built due to one layer has been solidified, and one layer of building
Support construction built completion, one layer of upper layer and lower layer support supplementary structure can be disassembled into installation to three layers and four
Between layer, to be supported to four layers.Specifically, first one layer of lower layer inserting component 2 can be disassembled, serve as three layers with
Upper layer between four layers inserts component 1, and one layer of upper layer is then inserted component 1 again and support rod 3 disassembles, is respectively served as
Lower layer's inserting component 2 and support rod 3 between three layers and four layers.That is, construction when can be used only several sets it is above-mentioned on
Lower two layers of support supplementary structure is recycled.
In disassembly, first the bolt of 3 bottom of support rod can be disassembled from support rod 3, remove 5 He of lower layer's upright bar
Lower layer inserts component 2, then pulls out upper layer inserting component 1 above floor together with support rod 3, is disassembled.It inserts
The separate mode and traditional jacking of arrangement and upright bar are identical as upright bar separate mode.
In some embodiments, tube body 31 is pvc pipe, and bar 3 easy to support is isolated with concrete floor, easy to disassemble.
In some embodiments, it when above-mentioned upper layer and lower layer support supplementary structure is in the top layer of building, needs on above-mentioned
Lower two layers of support supplementary structure has certain water-proof function, therefore, sealing piece can be equipped on support rod 3, at this time support rod 3
On be not arranged with pvc pipe, sealing piece is directly set on support rod 3, directly support rod 3 is stayed in floor after demoulding, and will
It is higher by the part excision of floor.
The embodiment of the utility model second aspect provides a kind of construction building structure, the reality of the utility model second aspect
The construction building structure for applying example offer includes above-mentioned upper layer and lower layer support supplementary structure.
The construction building structure that the utility model second aspect provides has the embodiment of the utility model first aspect to provide
Upper layer and lower layer support supplementary structure, thus with the utility model first aspect embodiment provide upper layer and lower layer support it is auxiliary
Help all beneficial effects possessed by structure.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (10)
1. a kind of upper layer and lower layer support supplementary structure, which is characterized in that including upper layer inserting component (1), lower layer's inserting component (2)
With multiple support rods (3), in which:
Upper layer inserting component (1) includes upper layer inserting screw rod (11), and upper layer inserting screw rod (11) is for being inserted into
In layer upright bar (4)；
Lower layer's inserting component (2) includes lower layer's inserting screw rod (21), and lower layer's inserting screw rod (21) is for being inserted into down
In layer upright bar (5)；
The both ends of the support rod (3) are connect with upper layer inserting component (1) and lower layer inserting component (2) respectively, with
Make the space for having for floor slab construction between upper layer inserting component (1) and lower layer inserting component (2).
2. upper layer and lower layer according to claim 1 support supplementary structure, which is characterized in that the upper layer inserts component (1)
It further include the upper layer connecting plate (12) being connect with multiple support rods (3), upper layer inserting screw rod (11) is set on described
On layer connecting plate (12).
3. upper layer and lower layer according to claim 1 support supplementary structure, which is characterized in that the lower layer inserts component (2)
Further include the lower layer's connecting plate (22) being connect with multiple support rods (3), lower layer inserting screw rod (21) be set to it is described under
On layer connecting plate (22).
4. upper layer and lower layer according to claim 1 support supplementary structure, which is characterized in that the upper layer inserts component (1)
It is oppositely arranged with lower layer inserting component (2).
5. upper layer and lower layer according to claim 1 support supplementary structure, which is characterized in that the support rod (3) is bolt,
The support rod (3) is connect with upper layer inserting component (1) and lower layer inserting component (2) respectively by nut.
6. upper layer and lower layer according to claim 1 support supplementary structure, which is characterized in that the support rod (3) is four.
7. upper layer and lower layer according to claim 1 support supplementary structure, which is characterized in that the outside of the support rod (3)
It is arranged with the tube body (31) for separating the support rod (3) and floor (6).
8. upper layer and lower layer according to claim 7 support supplementary structure, which is characterized in that the tube body (31) is pvc pipe.
9. upper layer and lower layer according to claim 1 support supplementary structure, which is characterized in that the support rod (3) is equipped with
Sealing piece.
10. a kind of construction building structure, which is characterized in that including the described in any item upper layer and lower layer supports of such as claim 1-9
Supplementary structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820716166.7U CN208441459U (en) | 2018-05-14 | 2018-05-14 | Upper and lower two-layer support auxiliary structure and construction building structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820716166.7U CN208441459U (en) | 2018-05-14 | 2018-05-14 | Upper and lower two-layer support auxiliary structure and construction building structure |
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| Publication Number | Publication Date |
|---|---|
| CN208441459U true CN208441459U (en) | 2019-01-29 |
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ID=65090984
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|---|---|---|---|
| CN201820716166.7U Expired - Fee Related CN208441459U (en) | 2018-05-14 | 2018-05-14 | Upper and lower two-layer support auxiliary structure and construction building structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425494A (en) * | 2018-05-14 | 2018-08-21 | 中国建筑第二工程局有限公司 | Upper and lower two-layer support auxiliary structure and construction building structure |
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2018
- 2018-05-14 CN CN201820716166.7U patent/CN208441459U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425494A (en) * | 2018-05-14 | 2018-08-21 | 中国建筑第二工程局有限公司 | Upper and lower two-layer support auxiliary structure and construction building structure |
| CN108425494B (en) * | 2018-05-14 | 2024-03-01 | 中国建筑第二工程局有限公司 | Upper and lower two-layer support auxiliary structure and construction building structure |
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