CN107795038B - Prefabricated part, connecting structure and mounting method - Google Patents
Prefabricated part, connecting structure and mounting method Download PDFInfo
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- CN107795038B CN107795038B CN201710312813.8A CN201710312813A CN107795038B CN 107795038 B CN107795038 B CN 107795038B CN 201710312813 A CN201710312813 A CN 201710312813A CN 107795038 B CN107795038 B CN 107795038B
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- prefabricated wall
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- wallboard
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- 238000000034 method Methods 0.000 title description 6
- 239000011324 bead Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 description 13
- 239000011440 grout Substances 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000009415 formwork Methods 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
Images
Classifications
-
- 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
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/82—Removable non-load-bearing partitions; Partitions with a free upper edge characterised by the manner in which edges are connected to the building; Means therefor; Special details of easily-removable partitions as far as related to the connection with other parts of the building
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/61—Connections for building structures in general of slab-shaped building elements with each other
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Load-Bearing And Curtain Walls (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention discloses a prefabricated wallboard connecting structure. The prefabricated wall panel comprises a wall panel body, wherein at least one end of the lower part of the wall panel body and/or the middle position of the lower part of the wall panel body are provided with notches; the wallboard body is provided with a lower rib partially extending into the gap; the left end and/or the right end of the wallboard body are/is provided with end stirrups extending relative to the wallboard body, and/or the middle part of the wallboard body is provided with middle stirrups extending outwards perpendicular to the side faces of the wallboard; the top wall surface of the notch forms a slope. The invention can greatly reduce the using amount of the grouting sleeve of the prefabricated wallboard, save the cost and improve the benefit.
Description
Technical Field
The invention relates to a prefabricated wallboard, a connecting structure and an installation method, and belongs to the field of PC (personal computer) housing industrialization.
Background
At present stage prefabricated wallboard is basically connected the back through two rows of grout sleeves and lower floor play muscle and pours fixedly, and especially edge member department grout sleeve quantity is more, has directly promoted the cost of prefabricated wallboard, and during the on the other hand installation, the sleeve installation need be aimed at, wastes time and energy and needs increase the grout cost.
Disclosure of Invention
The invention aims to provide a prefabricated wallboard, a connecting structure and an installation method.
In order to achieve the purpose, the invention adopts the technical scheme that:
a prefabricated wall panel comprises a wall panel body and is structurally characterized in that at least one end of the lower part of the wall panel body and/or the middle position of the lower part of the wall panel body are provided with notches; the wallboard body is provided with a lower rib partially extending into the gap; the left end and/or the right end of the wallboard body are/is provided with end stirrups extending relative to the wallboard body, and/or the middle part of the wallboard body is provided with middle stirrups extending outwards perpendicular to the side faces of the wallboard; the top wall surface of the notch forms a slope; preferably, when the notch is arranged at least at one end of the lower part of the wallboard body, the elevation of the outer end of the top wall surface of the notch is larger than the elevation of the inner end of the top wall surface of the notch; when the breach is seted up in the intermediate position of wallboard body lower part, the roof face of this breach is towards the elevation of the one end of middle part stirrup is higher than the elevation of the roof face other end.
Therefore, the gap is creatively introduced, so that the sleeve is not arranged in the existing sleeve dense area of the prefabricated wallboard, and the manufacturing cost and the installation cost of the prefabricated wallboard are greatly reduced. Preferably, the upper part of the next layer of prefabricated wall panel is bound with the lower part of the layer of prefabricated wall panel through the binding.
At least one end of the lower part of the wall board body is provided with a notch, and then the wall board body can be used for forming a straight-line-shaped or L-shaped node. The middle position of the lower part of the wallboard body is provided with a notch which can be used for forming a T-shaped node. Concrete poured when convenient prefabricated wallboard installation can get into the breach intussuseption and closely knit, and the top of breach forms domatic.
According to the embodiment of the invention, the invention can be further optimized, and the following is the technical scheme formed after optimization:
preferably, the height H =35d2-60d2 of the notch, wherein d2 is the diameter of the lower rib; the width D of the notch is 300mm-700mm, preferably D is 300mm-600mm, more preferably D is 300mm, 400mm or 500 mm.
The notch of the end part of the lower part of the wallboard body is a trapezoidal notch.
For the condition that the middle part is provided with the notch, the notch arranged in the middle of the lower part of the wallboard body is a door-shaped groove.
In a multi-storey building, the top of the wall panel body has a top stiffener extending upwardly; preferably the length of the top bead is greater than 35d1, preferably 35d1-70d1, where d1 is the diameter of the top bead. Therefore, the upper part of the steel bar extends into the gap after penetrating through the floor slab, is bound with the lower part of the steel bar, and is cast in situ.
In order to adapt to the straight-line or L-shaped node, based on the same invention concept, the invention also provides a prefabricated wallboard connecting structure, which comprises a floor slab and the prefabricated wallboard arranged on the floor slab; a cast-in-place section is arranged on one side of the end part of the prefabricated wall panel, and a lower part rib of the prefabricated wall panel is fixedly connected with an upper part rib of the floor slab or a top rib of the next layer of prefabricated wall panel; the end stirrups of the prefabricated wall panel are arranged in the cast-in-place section, and the gap is filled in the lower part of the cast-in-place section so as to fixedly connect the floor slab and the prefabricated wall panel together; preferably, the length of the top protruding rib of the next layer of prefabricated wall panel extending into the gap is more than 35d1 and less than the height of the gap, wherein d1 is the diameter of the top protruding rib.
In order to adapt to the T-shaped node, based on the same invention concept, the invention also provides a prefabricated wallboard connecting structure, which comprises a floor slab and the prefabricated wallboard arranged on the floor slab; a cast-in-place section is arranged at the middle stirrup of the prefabricated wall panel, and the lower part of the prefabricated wall panel is fixedly connected with the upper part of the floor slab or the top of the next layer of prefabricated wall panel; the middle stirrups of the prefabricated wall panels are arranged in the cast-in-place sections, and the gaps are filled in the lower parts of the cast-in-place sections so as to fixedly connect the floor slabs and the prefabricated wall panels together; preferably, the length of the top protruding rib of the next layer of prefabricated wall panel extending into the gap is more than 35d1 and less than the height of the gap, wherein d1 is the diameter of the top protruding rib.
Therefore, when the upper floor slab is cast in place, the upper floor slab, the cast-in-place section between the lower floor slabs and the lower floor slab are connected into a whole, and finally the upper floor slab, the lower floor slab, the middle wall slab and the cast-in-place section are connected into a whole.
In order to improve the installation stability of the prefabricated wall panel, a grouting section is arranged between the upper surface of the floor slab and the bottom end face of the prefabricated wall panel; preferably the thickness of the grout section is 15mm to 30 mm.
Based on the same inventive concept, the invention also provides an installation method of the prefabricated wall panel, which comprises the following steps:
s1, installing the next layer of prefabricated wall board and fixing the prefabricated wall board by using an inclined support, installing a floor slab on the next layer of prefabricated wall board, and installing or pouring a formwork on the floor slab;
s2, casting a next cast-in-place section among the prefabricated wall panels, the adjacent wall panels and the floor slab, or casting a next cast-in-place section and a cast-in-place floor slab among the prefabricated wall panels, the adjacent wall panels and the floor slab formwork; the top of the next layer of prefabricated wall panel is provided with a rib which penetrates through the floor slab;
s3, installing the layer of prefabricated wallboard on a floor slab, wherein a top rib of the next layer of prefabricated wallboard extends into a gap of the layer of prefabricated wallboard, and a lower rib of the layer of prefabricated wallboard is fixed with the top rib of the next layer of prefabricated wallboard;
s4, pouring the cast-in-place section of the floor between the prefabricated wallboard of the floor and the adjacent wallboard, and filling the gap with cast-in-place concrete to fixedly connect the floor, the prefabricated wallboard of the floor and the adjacent wallboard together.
And step S3, installing and fixing the layer of prefabricated wallboard, and then arranging a grouting section on the floor slab, wherein the grouting section fixes the floor slab and the layer of prefabricated wallboard together.
Compared with the prior art, the invention has the beneficial effects that: the invention obviously saves grouting sleeves at the edge members and reduces the installation cost of the prefabricated wall panel, generally speaking, 6-12 grouting sleeves can be saved by arranging a single notch, the cost of each grouting sleeve is about 10 yuan, and the cost of 100 yuan and 300 yuan can be saved by installing a single prefabricated wall panel.
In addition, the wallboard is more convenient to mount and align, the reinforcing steel bars are directly bound at the notches, the alignment of grouting sleeves in dense areas is avoided, and the mounting time is shortened.
The grouting sleeve is reduced, so that the corresponding assembly and alignment are more convenient, the installation time is reduced, and in addition, the grouting section is shortened, the grouting amount and the grouting time are reduced, and the manpower and material resources are saved.
Drawings
FIG. 1 is a schematic diagram of the structure of one embodiment of the present invention;
FIG. 2 is a schematic illustration of an installation of one embodiment of the present invention;
FIG. 3 is a schematic block diagram of another embodiment of the present invention;
FIG. 4 is a schematic longitudinal section of FIG. 3;
FIG. 5 is a bottom view of a type node according to the present invention;
FIG. 6 is a bottom view of the L-shaped node of the present invention;
FIG. 7 is a bottom view of a T-node according to the present invention;
FIG. 8 is a bottom view of another T-node of the present invention;
FIG. 9 is an isometric view of an L-shaped node of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.
Example 1
A prefabricated wall panel, as shown in fig. 1, comprises a wall panel body, wherein a notch 600, preferably a trapezoidal notch 601, is formed at one end of the lower part of the wall panel body. The grouting sleeve 800 can be embedded in the part without the notch, and a grouting hole is formed in the wallboard instead of the grouting sleeve. The wallboard body is provided with a lower rib 201 partially extending into the gap 600, and the top of the wallboard body is provided with an upper rib 202 extending upwards; the left end of the wallboard body has an end stirrup 203 extending relative to the wallboard body.
The distance between the outer end of the top wall surface of the notch 600 at the end part of the lower part of the wallboard body and the bottom end surface of the wallboard body is larger than the distance between the inner end of the top wall surface of the notch 600 and the bottom end surface of the wallboard body. In other words, the notch 601 is preferably a trapezoid notch with a high outer part and a low inner part, so that the concrete of the cast-in-place section can conveniently enter the notch.
The height H =35d2~60d2 of breach 600, wherein d2 is the diameter that the lower portion goes out the muscle 201, can practice thrift 3-6 groups of grout sleeve, namely 6-12.
The width D of the notch 600 is 300mm-700mm, preferably D is 300mm, 400mm, 500 mm.
The grout muffjoint of this embodiment with prefabricated wallboard lower part tip department changes the reinforcement connection into, can save the grout muffjoint of marginal component department, practices thrift the cost. Because grout sleeve has reduced, corresponding dress is counterpointed just more convenient, reduces installation time, in addition because the grout section shortens, and grout volume and grout time reduce, have practiced thrift manpower and material resources.
Preferably, the bottom of the prefabricated wall panel component is provided with a trapezoidal notch, the outer part of the trapezoidal notch is high, the inner part of the trapezoidal notch is low, and the reinforcing steel bars extend out of the notch to the bottom. The top of the prefabricated wall panel also has an upwardly extending upper bead 202 of length 35d3-60d3 where d3 is the diameter of the rebar, typically 12mm or 14 mm.
A prefabricated wall panel connecting structure, as shown in fig. 2, comprising a floor slab 300 and said prefabricated wall panel 200 disposed on the floor slab 300; a cast-in-place section 500 is arranged on one side of the end part of the prefabricated wall panel 200, and a lower rib 201 of the prefabricated wall panel 200 is fixedly connected with an upper rib 101 of the floor slab 300 or a top rib 101 of the next layer of prefabricated wall panel 100; the end stirrups 203 of the prefabricated wall panel 200 are arranged in the cast-in-place section 500, and the lower part of the cast-in-place section 500 fills the gap 600 to fixedly connect the floor slab 300 and the prefabricated wall panel 200 together, thereby forming a straight node as shown in fig. 5 or an L-shaped node as shown in fig. 6 and 9.
The thickness of the cast-in-place section 500 is generally 400-700mm, and the field wet operation is greatly reduced.
The installation method of the prefabricated wall panel, as shown in fig. 2, includes the following steps:
and S1, installing the next layer of prefabricated wall panel 100, fixing the prefabricated wall panel by using an inclined support, pouring a sealing material to connect the next layer of prefabricated wall panel 100 with the next layer of floor, installing the floor 300 on the next layer of prefabricated wall panel 100, installing the floor on the floor or pouring a formwork, erecting the formwork and installing the floor or pouring the floor in situ and the cast-in-situ section on the next layer.
S2, casting a next cast-in-place section 400 among the next prefabricated wall panel 100, the adjacent wall panels and the floor slab 300 in a cast-in-place mode, or casting a next cast-in-place section 400 and a cast-in-place floor slab among the next prefabricated wall panel 100, the adjacent wall panels and the floor slab formwork; the top rib 101 of the next layer of prefabricated wall panel 100 penetrates through the floor slab 300;
s3, installing the layer of prefabricated wall panel 200 on a floor panel 300, arranging a grouting section 301 between the floor panel 300 and the layer of prefabricated wall panel 200, wherein the thickness of the grouting section is about 20mm, the top ribs 101 of the next layer of prefabricated wall panel 100 extend into the gaps 600 of the layer of prefabricated wall panel 200, and binding and fixing the lower ribs 201 of the layer of prefabricated wall panel 200 and the top ribs 101 of the next layer of prefabricated wall panel 100;
s4, pouring the cast-in-place section 500 between the prefabricated wall panel 200 and the adjacent wall panel 700, and filling the gap 600 with cast-in-place concrete to fixedly connect the floor slab 300, the prefabricated wall panel 200 and the adjacent wall panels together.
Therefore, the prefabricated wall panel is firstly installed and fixed on the plane of a floor slab, the binding steel bars on the lower layer are inserted into the stirrups of the upper layer member, the binding steel bars on the upper layer and the lower layer are bound together by binding wires, and the gap of the member is filled with concrete through cast-in-place concrete and is connected with the cast-in-place section into a whole.
Example 2
A prefabricated wall panel, as shown in fig. 3 and 4, comprises a wall panel body, wherein a notch 600, preferably a door-shaped groove 602, is formed in the middle of the lower part of the wall panel body; the body has a lower bead 201 extending partially into the gap 600 and the top of the body has an upper bead 202 extending upwardly. The middle of the wall panel body has a middle stirrup 204 extending outward perpendicular to the wall panel sides. The rest of the structure is similar to that of embodiment 1 and is not described again.
The top wall surface of the door-shaped groove forms a slope surface, and the elevation of one end, facing the middle stirrup 204, of the top wall surface of the door-shaped groove is higher than that of the other end of the top wall surface, namely, the top is higher at the outside and the bottom is lower at the inside, so that the cast-in-place section of concrete can conveniently enter the gap. Preferably, the notch 600 at the lower end of the wall panel body is a trapezoidal notch.
A prefabricated wall panel connection structure comprises a floor slab 300 and the prefabricated wall panel 200 arranged on the floor slab 300; a cast-in-place section 500 is arranged between the middle stirrup 204 of the prefabricated wall panel 200 with the door-shaped groove 602 and the other prefabricated wall panel 200' with the trapezoidal notch 601 at the bottom end part, and the lower part rib 201 of the prefabricated wall panel 200 is fixedly connected with the top rib 101 of the next layer of prefabricated wall panel 100 in a binding manner; the middle stirrups 204 of the prefabricated wall panels 200 are arranged in the cast-in-place section 500, and the lower part of the cast-in-place section 500 fills the gate-shaped grooves and the trapezoidal gaps 601 to fixedly connect the floor slab 300 and the prefabricated wall panels 200, 200', thereby forming a T-shaped node as shown in fig. 7.
Example 3
A prefabricated wallboard T-shaped connecting structure comprises three prefabricated wallboards in embodiment 1, wherein notches 600 are formed in the lower end portions of the butt joints of the three prefabricated wallboards, and T-shaped cast-in-place sections are arranged at the butt joints of the three prefabricated wallboards, as shown in figure 8.
During construction, the prefabricated wall panel is installed and fixed on a floor slab plane, binding steel bars on a lower layer are inserted into stirrups of an upper layer member, binding steel bars on an upper layer and a lower layer are bound together by binding wires, and gaps of the members are filled with concrete through cast-in-place concrete and connected with the cast-in-place section into a whole.
The foregoing examples are set forth to illustrate the present invention more clearly and are not to be construed as limiting the scope of the invention, which is defined in the appended claims to which the invention pertains, as modified in all equivalent forms, by those skilled in the art after reading the present invention.
Claims (9)
1. The prefabricated wall panel connecting structure is characterized by comprising a floor (300) and a prefabricated wall panel (200) arranged on the floor (300);
the prefabricated wall board comprises a wall board body, wherein at least one end of the lower part of the wall board body is provided with a notch (600), and a grouting sleeve (800) is still embedded in the part without the notch; the wallboard body is provided with a lower rib (201) which partially extends into the notch (600);
the left end and/or the right end of the wallboard body is provided with an end stirrup (203) extending relative to the wallboard body; the top wall surface of the notch (600) forms a slope;
a cast-in-place section (500) is arranged on one side of the end part of the prefabricated wall panel (200), and a lower rib (201) of the prefabricated wall panel (200) is fixedly connected with an upper rib of the floor slab (300) or a top rib (101) of the next layer of prefabricated wall panel (100); the end stirrups (203) of the prefabricated wall panel (200) are arranged in the cast-in-place section (500), and the gap (600) is filled at the lower part of the cast-in-place section (500) so as to fixedly connect the floor slab (300) and the prefabricated wall panel (200) together;
the notch (600) at the end part of the lower part of the wallboard body is a trapezoidal notch (601);
a grouting section (301) is arranged between the upper surface of the floor slab (300) and the bottom end surface of the prefabricated wall panel (200);
the length of the top protruding rib (101) of the next layer of prefabricated wall panel (100) extending into the notch (600) is more than 35d1 and less than the height of the notch (600), wherein d1 is the diameter of the top protruding rib (101);
when the notch (600) is arranged at least one end of the lower part of the wallboard body, the elevation of the outer end of the top wall surface of the notch (600) is larger than the elevation of the inner end of the top wall surface of the notch (600).
2. The prefabricated wall panel connecting structure is characterized by comprising a floor (300) and a prefabricated wall panel (200) arranged on the floor (300);
the prefabricated wall board comprises a wall board body, wherein a notch (600) is formed in the middle of the lower portion of the wall board body, and a grouting sleeve (800) is still embedded in the portion without the notch; the wallboard body is provided with a lower rib (201) which partially extends into the notch (600);
the middle part of the wallboard body is provided with a middle stirrup (204) which extends outwards and is vertical to the side surface of the wallboard; the top wall surface of the notch (600) forms a slope;
a cast-in-place section (500) is arranged at a middle stirrup (204) of the prefabricated wall panel (200), and a lower rib (201) of the prefabricated wall panel (200) is fixedly connected with an upper rib of the floor slab (300) or a top rib (101) of the next layer of prefabricated wall panel (100); the middle stirrups (204) of the prefabricated wall panel (200) are arranged in the cast-in-place section (500), and the gap (600) is filled at the lower part of the cast-in-place section (500) so as to fixedly connect the floor slab (300) and the prefabricated wall panel (200) together;
a notch (600) formed in the middle of the lower part of the wallboard body is a door-shaped groove (602);
a grouting section (301) is arranged between the upper surface of the floor slab (300) and the bottom end surface of the prefabricated wall panel (200);
the length of the top protruding rib (101) of the next layer of prefabricated wall panel (100) extending into the notch (600) is more than 35d1 and less than the height of the notch (600), wherein d1 is the diameter of the top protruding rib (101);
when the notch (600) is arranged in the middle of the lower portion of the wall board body, the elevation of the top wall surface of the notch (600) faces towards one end of the middle stirrup (204) and is higher than the elevation of the other end of the top wall surface.
3. A prefabricated wall panel connection according to claim 1 or 2, wherein the grouted section has a thickness of 15mm-30 mm.
4. Prefabricated wall panel connection structure according to claim 1 or 2, wherein the height H =35d2-60d2 of the gap (600), wherein d2 is the diameter of the lower beading (201); the width D of the notch (600) is 300mm-700 mm.
5. A prefabricated wall panel connection according to claim 4, wherein D is 300mm-600 mm.
6. A prefabricated wall panel connection according to claim 5, wherein D is 300mm, 400mm or 500 mm.
7. A prefabricated wall panel connection according to claim 1 or 2, wherein the top of the wall panel body has an upwardly extending upper bead (202).
8. Prefabricated wall panel connection according to claim 7, wherein the length of the upper beading (202) is greater than 35d3, wherein d3 is the diameter of the upper beading (202).
9. A prefabricated wall panel connection structure according to claim 8, wherein the length of said upper beading (202) is 35d3-70d 3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710312813.8A CN107795038B (en) | 2017-05-05 | 2017-05-05 | Prefabricated part, connecting structure and mounting method |
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| CN201710312813.8A CN107795038B (en) | 2017-05-05 | 2017-05-05 | Prefabricated part, connecting structure and mounting method |
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| CN107795038A CN107795038A (en) | 2018-03-13 |
| CN107795038B true CN107795038B (en) | 2020-05-08 |
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| CN109914587B (en) * | 2019-03-25 | 2020-08-18 | 中厦建设有限公司 | Cross connection structure of assembled prefabricated floor and wallboard |
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| CN104763082B (en) * | 2015-03-26 | 2017-01-25 | 天津大学建筑设计研究院 | Upper and lower connecting structure of assembled shearing force wall |
| CN104847039A (en) * | 2015-05-27 | 2015-08-19 | 天津大学建筑设计研究院 | Reinforcing fabricated shear wall structure with shear keys |
| CN204804098U (en) * | 2015-06-13 | 2015-11-25 | 内蒙古建筑职业技术学院 | Assembled shear wall structure |
| CN105040816A (en) * | 2015-08-27 | 2015-11-11 | 湖南大学 | Prefabricated assembly type and hidden-support-equipped superposed plate type reinforced concrete core wall |
| CN106400952A (en) * | 2016-07-29 | 2017-02-15 | 刘祥锦 | Assembly type prefabricated structure wallboard unit and connecting joints thereof |
| CN206957044U (en) * | 2017-05-05 | 2018-02-02 | 中国水利水电第八工程局有限公司 | A kind of prefabricated panel and its attachment structure |
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