1. A precast concrete outer-hanging wallboard system comprises a concrete outer-hanging wallboard (1), an upper hanging component and a lower hanging component; the concrete external wall boards (1) are arranged in a group and are arranged on the outer side of the main body structure (2), and the group of concrete external wall boards (1) are spliced and connected; the method is characterized in that: a notch (3) is formed in the bottom of the inner side face of the concrete external wallboard (1) along the longitudinal direction; the upper hanging components are in a group and are connected between the upper part of the concrete external wall-hanging plate (1) and the main body structure (2) at intervals; the hanging component comprises a first hanging plate (4), a vertical embedded plate (5), a first vertical reinforcing steel bar (6), a horizontal embedded plate (7) and a horizontal reinforcing steel bar (8); the first hanging plate (4) is embedded at the upper part of the concrete external wall-hanging plate (1) and is close to the inner side surface of the concrete external wall-hanging plate (1), and the first hanging plate (4) is parallel to the inner side surface of the concrete external wall-hanging plate (1); the upper end of the first hanging plate (4) exceeds the top surface of the concrete external hanging wall plate (1), and the height of the exceeding part is not more than the height of the gap (3); a U-shaped groove (9) is arranged in the middle of the top of the first hanging plate (4); first through holes (15) are arranged at intervals on the part of the first hanging plate (4) embedded in the concrete outer-hanging wall plate (1); a shear resistant piece (16) penetrates through the first through hole (15); the vertical buried plate (5) is vertically connected to the lower part of the first hanging plate (4) along the vertical axis of the first hanging plate (4); the top of the vertical embedded plate (5) does not exceed the top surface of the concrete external wall-hanging plate (1), and the inner side edge of the vertical embedded plate (5) exceeds the inner side surface of the concrete external wall-hanging plate (1); the part of the vertical embedded plate (5) exceeding the inner side surface of the concrete external wallboard (1) is embedded in the main structure (2), and second through holes (17) are formed in the part of the vertical embedded plate (5) and positioned in the main structure (2) at intervals; the first vertical reinforcing steel bars (6) are arranged in a group at intervals on the lower part of the first hanging plate (4), the upper parts of the first vertical reinforcing steel bars (6) are welded with the first hanging plate (4), and the lower parts of the first vertical reinforcing steel bars (6) are embedded in the concrete external wall-hanging plate (1); the horizontal buried plate (7) is connected to the bottom of the vertical buried plate (5) and buried in the main structure (2); the horizontal reinforcing steel bar (8) penetrates through the second through hole (17); the lower hanging components are arranged in a group and are embedded at intervals at the lower part of the concrete external hanging wallboard (1), and the lower hanging components and the upper hanging components are arranged correspondingly; the lower hanging assembly comprises a second hanging plate (10), a first clamping plate (11), a second clamping plate (12), a second vertical reinforcing steel bar (13) and a connecting bolt (14); the second hanging plates (10), the first clamping plates (11) and the second clamping plates (12) are arranged in parallel at intervals along the transverse direction, the second hanging plates (10) are embedded in the concrete external wall-hanging plate (1), and the first clamping plates (11) are attached to the vertical tangent planes of the notches (3); the second hanging plate (10), the first clamping plate (11) and the second clamping plate (12) are connected through a connecting bolt (14); the second vertical reinforcing steel bars (13) are in a group and are connected to the plate surface of the second hanging plate (10) at intervals; the lower end of the second vertical reinforcing steel bar (13) exceeds the lower edge of the second hanging plate (10), and the upper end of the second vertical reinforcing steel bar (13) exceeds the upper edge of the second hanging plate (10); the first clamping plate (11) and the second clamping plate (12) on the upper concrete outer wallboard (1) are clamped on two sides of the first hanging plate (4) of the lower concrete outer wallboard (1), and the connecting bolt (14) on the upper layer is clamped in the U-shaped groove (9) on the lower layer.

2. The precast concrete outer wall panel system according to claim 1, wherein: the depth of the notch (3) is 45-55 mm; the height of the gap (3) is 10-15 cm.

3. The precast concrete outer wall panel system according to claim 1, wherein: the depth h of the U-shaped groove (9) is more than or equal to (d + 5)/2 +60 mm; h is the depth of the U-shaped groove (9), and d is the diameter of the screw in the connecting bolt (14).

4. The precast concrete outer wall panel system of claim 3, wherein: the height H of the first hanging plate (4) beyond the top surface of the concrete external hanging wall plate (1) is H & gt H; the distance between the first hanging plate (4) and the inner side surface of the concrete external hanging wall plate (1) is larger than 36 mm.

5. The precast concrete outer wall panel system according to claim 1, wherein: vertical caulking grooves (18) are arranged on the plate surface of the second hanging plate (10) at intervals; the second vertical reinforcing steel bars (13) are correspondingly embedded in the caulking grooves (18) and are connected with the second hanging plates (10) in a welding mode.

6. The precast concrete outer wall panel system according to claim 1, wherein: the length L of the second vertical reinforcing steel bar (13) beyond the top edge of the second hanging plate (10) is more than or equal to 35D; d is the diameter of the second vertical reinforcing steel bar (13), and L is the length of the second vertical reinforcing steel bar (13) exceeding the top edge of the second hanging plate (10); the length of the second vertical reinforcing steel bar (13) exceeding the bottom edge of the second hanging plate (10) is 20-50 mm.

7. The precast concrete outer wall panel system according to claim 1, wherein: a connecting plate (19) is welded and connected on the outer side surface of the first clamping plate (11); the connecting plate (19) is embedded in the concrete external wall panel (1).

8. The precast concrete outer wall panel system according to claim 1, wherein: the top of the concrete external wall-hung panel (1) is provided with an upper tongue-and-groove (20), and the bottom of the concrete external wall-hung panel (1) is provided with a lower tongue-and-groove (21); the vertically adjacent concrete external wall boards (1) are connected through tongue-and-groove; sealing glue rods (22) are respectively arranged at the joints and the positions close to the inner side surface and the outer side surface of the concrete external wall panel (1).

9. A method of constructing a precast concrete outer panel system according to any one of claims 1 to 8, comprising the steps of:

manufacturing an upper hanging component and a lower hanging component;

step two, prefabricating the concrete external wall panel (1) in a factory, hanging and connecting components on the upper part of the concrete external wall panel (1) in a pre-embedded mode, and hanging and connecting components on the lower part of the concrete external wall panel (1) in a pre-embedded mode;

thirdly, positioning the concrete external wall board (1) before installation;

transporting the concrete external wallboard (1) to a site, hoisting the concrete external wallboard to an installation position, and installing a first clamping plate (11);

putting a screw rod of a connecting bolt (14) into a U-shaped groove (9) of an upper hanging component of the lower-layer concrete outer hanging wallboard (1), installing a second clamping plate (12), and tightening a nut of the connecting bolt (14);

step six, erecting and fixing a template of the main body structure;

and seventhly, pouring concrete to finish the construction of the main body structure.

Background

Compared with the traditional brick wall structure, the prefabricated external wall panel has the characteristics of good integrity, light structure, increase of the effective use area of the building, reduction of field wet operation, improvement of labor conditions, improvement of labor productivity and the like, is one of important ways for realizing wall reformation and improving the building industrialization level, and promotes the standardization, industrial production and installation of building structural parts. The existing common precast concrete sandwich heat-insulation external wall panel connecting piece in China has a plurality of problems, such as anchoring mechanics problem, complex structure, difficult positioning of the connecting piece, easy displacement, difficult control of the thickness of a protective layer, easy floating of the heat-insulation layer during secondary concrete pouring and the like during concrete pouring. Therefore, the external wallboard connecting piece which is safe, economical and convenient to construct is urgently needed to be designed.

Disclosure of Invention

The invention provides a precast concrete external wallboard system and a construction method thereof, and aims to solve the technical problems that the traditional external wallboard anchoring structure is difficult to position and displace a connecting piece, the thickness of a protective layer is difficult to control, the insulating layer is easy to float during secondary concrete pouring, and the anti-seismic performance is poor.

In order to achieve the above object, the present invention provides the following solutions.

A precast concrete outer-hanging wallboard system comprises a concrete outer-hanging wallboard, an upper hanging component and a lower hanging component; the concrete outer wall boards are arranged in a group and are arranged on the outer side of the main body structure, and the group of concrete outer wall boards are spliced and connected; a notch is formed in the bottom of the inner side face of the concrete external wall-hanging plate along the longitudinal direction; the upper hanging components are in a group and are connected between the upper part of the concrete external wall-hanging plate and the main body structure at intervals; the hanging component comprises a first hanging plate, a vertical embedded plate, a first vertical reinforcing steel bar, a horizontal embedded plate and a horizontal reinforcing steel bar; the first hanging plate is embedded at the upper part of the concrete external hanging wallboard and is close to the inner side surface of the concrete external hanging wallboard, and the first hanging plate is parallel to the inner side surface of the concrete external hanging wallboard; the upper end of the first hanging plate exceeds the top surface of the concrete external hanging wall plate, and the height of the exceeding part is not more than the height of the gap; a U-shaped groove is formed in the middle of the top of the first hanging plate; first through holes are arranged at intervals on the position where the first hanging plate is embedded in the concrete outer-hanging wall plate; a shear resistant part penetrates through the first through hole; the vertical buried plate is vertically connected to the lower part of the first hanging plate along the vertical axis of the first hanging plate; the top of the vertical buried plate does not exceed the top surface of the concrete external wall panel, and the inner side edge of the vertical buried plate exceeds the inner side surface of the concrete external wall panel; the part of the vertical embedded plate, which exceeds the inner side surface of the concrete external wallboard, is embedded in the main structure, and second through holes are arranged on the vertical embedded plate and the part of the vertical embedded plate, which is positioned in the main structure, at intervals; the first vertical reinforcing steel bars are arranged in a group at intervals on the lower part of the first hanging plate, the upper parts of the first vertical reinforcing steel bars are welded with the first hanging plate, and the lower parts of the first vertical reinforcing steel bars are embedded in the concrete external wall-hanging plate; the horizontal buried plate is connected to the bottom of the vertical buried plate and buried in the main body structure; the horizontal reinforcing steel bar penetrates through the second through hole; the lower hanging components are embedded at intervals at the lower part of the concrete externally-hung wallboard, and are arranged corresponding to the upper hanging components; the lower hanging assembly comprises a second hanging plate, a first clamping plate, a second vertical reinforcing steel bar and a connecting bolt; the second hanging plates, the first clamping plates and the second clamping plates are arranged in parallel at intervals along the transverse direction, the second hanging plates are embedded in the concrete external hanging wall plate, and the first clamping plates are attached to the vertical tangent planes of the notches; the second hanging plate, the first clamping plate and the second clamping plate are connected through connecting bolts; one group of second vertical reinforcing steel bars are connected to the plate surface of the second hanging plate at intervals; the lower end of the second vertical reinforcing steel bar exceeds the lower edge of the second hanging plate, and the upper end of the second vertical reinforcing steel bar exceeds the upper edge of the second hanging plate; the first clamping plate and the second clamping plate on the upper concrete outer wallboard are clamped on two sides of the first hanging plate of the lower concrete outer wallboard, and the connecting bolt on the upper layer is clamped in the U-shaped groove on the lower layer.

Preferably, the depth of the notch is 45 mm-55 mm; the height of the gap is 10-15 cm.

Preferably, the depth h of the U-shaped groove is more than or equal to (d + 5)/2 +60 mm; h is the depth of the U-shaped groove, and d is the diameter of the screw in the connecting bolt.

Preferably, the height H of the first hanging plate, which exceeds the top surface of the concrete external hanging wallboard, is more than H; the distance between the first hanging plate and the inner side surface of the concrete outer hanging wall plate is more than 36 mm.

Preferably, vertical caulking grooves are formed in the plate surface of the second hanging plate at intervals; and the second vertical reinforcing steel bars are correspondingly embedded in the caulking grooves and are connected with the second hanging plates in a welding manner.

Preferably, the length L of the second vertical reinforcing steel bar exceeding the top edge of the second hanging plate is equal to or more than 35D, D is the diameter of the second vertical reinforcing steel bar, and L is the length of the second vertical reinforcing steel bar exceeding the top edge of the second hanging plate; the length of the second vertical reinforcing steel bar beyond the bottom edge of the second hanging plate is 20-50 mm.

Preferably, a connecting plate is welded and connected to the outer side surface of the first clamping plate; the connecting plate is embedded in the concrete external wall panel.

Preferably, the top of the concrete external wall panel is provided with an upper tongue-and-groove, and the bottom of the concrete external wall panel is provided with a lower tongue-and-groove; the vertically adjacent concrete external wall boards are connected through the tongue-and-groove; and sealing rubber bars are respectively arranged at the joint and the positions close to the inner side surface and the outer side surface of the concrete external wall panel.

A construction method of a precast concrete external wallboard system comprises the following steps.

Step one, manufacturing an upper hanging component and a lower hanging component.

And secondly, prefabricating the concrete external wall panel in a factory, hanging and connecting the assembly on the upper part of the concrete external wall panel in a pre-embedded mode, and hanging and connecting the assembly on the lower part of the concrete external wall panel in a pre-embedded mode.

And step three, positioning the concrete external wall panel before installation.

And step four, transporting the concrete external wallboard to a site, hoisting the concrete external wallboard to the installation position, and installing the first clamping plate.

And fifthly, putting the screw rod of the connecting bolt into a U-shaped groove of an upper hanging component of the lower concrete outer hanging wallboard, installing a second clamping plate, and screwing a nut of the connecting bolt.

And step six, erecting and fixing the template of the main body structure.

And seventhly, pouring concrete to finish the construction of the main body structure.

Compared with the prior art, the invention has the following beneficial effects.

1. As the existing common precast concrete sandwich heat-insulation external wall panel connecting piece in China has a plurality of problems, such as anchoring mechanics problem and complex structure; when concrete is poured outside the external wall panel, the connecting piece is difficult to position and easy to displace, the thickness of the protective layer is difficult to control, and the insulating layer is easy to float during secondary pouring of the concrete; the upper hanging component and the lower hanging component in the precast concrete externally-hung wallboard system can simultaneously meet the connection between the precast concrete externally-hung wallboards and the connection with the main body structure, and the upper hanging component and the lower hanging component are combined to be accurately positioned, so that the precast concrete externally-hung wallboard system is convenient to construct and operate, and is safe and reliable.

2. The upper hanging component and the main body structure are fixedly connected, and the lower hanging component and the main body structure are fixedly connected, so that the reliable connection of the external hanging wallboard and the main body is ensured; meanwhile, the lower hanging component and the upper hanging component are hinged to each other, so that the effect of hinged connection between the upper concrete outer wallboard and the lower concrete outer wallboard is achieved, the influence of the outer wallboard on the main structure is small under the action of an earthquake, and the shock resistance of the main structure and the concrete outer wallboard is guaranteed.

3. The upper hanging component and the lower hanging component are mainly prefabricated in a factory, so that the site construction is reduced, the construction error is controlled, the positioning accuracy of the hanging components is ensured, the thickness of a protective layer of an embedded part can be effectively ensured to be aligned on site only by screwing the nut, the installation is simple, the operation is easy and convenient, and the disturbance of the prefabricated concrete externally-hung wallboard component during secondary concrete pouring is effectively reduced because the upper hanging component and the lower hanging component are finished products in the factory.

4. The components of the upper hanging component and the lower hanging component are simple to manufacture and convenient to assemble, and the steel plates in the hanging components can be thickened, the diameter of the anchoring steel bar can be increased through the welding mode of welding seams, the diameter of the anchoring steel bar can be increased, and the like, so that the requirements of different projects can be flexibly met.

Drawings

FIG. 1 is a schematic structural view of a precast concrete exterior wall panel system of the present invention.

Fig. 2 is a schematic structural diagram of the upper hanging component of the present invention.

FIG. 3 is a schematic view of a lower hitch assembly of the present invention.

Fig. 4 is a schematic view of the structure of the present invention in which the upper hitch assembly is connected between the concrete outer panel and the main structure.

Fig. 5 is a schematic view of the construction of the present invention with the lower hitch assembly attached to a concrete outer panel.

Fig. 6 is a schematic structural view of a first vertical reinforcing bar according to the present invention.

Reference numerals: the concrete external wallboard comprises 1-concrete external wallboard, 2-main body structure, 3-gap, 4-first hanging plate, 5-vertical embedded plate, 6-first vertical reinforcing steel bar, 6.1-upper vertical section, 6.2-lower vertical section, 6.3-inclined section, 7-horizontal embedded plate, 8-horizontal reinforcing steel bar, 9-U-shaped groove, 10-second hanging plate, 11-first clamping plate, 12-second clamping plate, 13-second vertical reinforcing steel bar, 14-connecting bolt, 15-first perforation, 16-shearing resistant piece, 17-second perforation, 18-caulking groove, 19-connecting plate, 20-upper rabbet, 21-lower rabbet and 22-sealing glue bar.

Detailed Description

As shown in fig. 1 to 6, the precast concrete outer wall panel system includes a concrete outer wall panel 1, an upper hanging assembly and a lower hanging assembly; the concrete external wall boards 1 are arranged in a group and are arranged on the outer side of the main body structure 2, and the group of concrete external wall boards 1 are spliced and connected; a notch 3 is formed in the bottom of the inner side face of the concrete external wallboard 1 along the longitudinal direction; the upper hanging components are in a group and are connected between the upper part of the concrete external wall-hanging plate 1 and the main body structure 2 at intervals; the hanging component comprises a first hanging plate 4, a vertical buried plate 5, a first vertical reinforcing steel bar 6, a horizontal buried plate 7 and a horizontal reinforcing steel bar 8; the first hanging plate 4 is embedded at the upper part of the concrete external wall-hanging plate 1 and is close to the inner side surface of the concrete external wall-hanging plate 1, and the first hanging plate 4 is parallel to the inner side surface of the concrete external wall-hanging plate 1; the upper end of the first hanging plate 4 exceeds the top surface of the concrete external hanging wall plate 1, and the height of the exceeding part is not more than the height of the gap 3; a U-shaped groove 9 is arranged in the middle of the top of the first hanging plate 4; the first hanging plate 4 is embedded in the concrete outer-hanging wall plate 1, and first through holes 15 are arranged at intervals; a shear resistant piece 16 penetrates through the first through hole 15; the vertical buried plate 5 is vertically connected to the lower part of the first hanging plate 4 along the vertical axis of the first hanging plate 4; the top of the vertical embedded plate 5 does not exceed the top surface of the concrete external wallboard 1, and the inner side edge of the vertical embedded plate 5 exceeds the inner side surface of the concrete external wallboard 1; the part of the vertical embedded plate 5, which exceeds the inner side surface of the concrete external wallboard 1, is embedded in the main structure 2, and second through holes 17 are arranged on the vertical embedded plate 5 and the part of the vertical embedded plate, which is positioned in the main structure 2, at intervals; the first vertical reinforcing steel bars 6 are arranged in a group at intervals on the lower part of the first hanging plate 4, the upper parts of the first vertical reinforcing steel bars 6 are welded with the first hanging plate 4, and the lower parts of the first vertical reinforcing steel bars 6 are embedded in the concrete external wall-hanging plate 1; the horizontal buried plate 7 is connected to the bottom of the vertical buried plate 5 and buried in the main structure 2; the horizontal reinforcing steel bar 8 is arranged in the second through hole 17 in a penetrating mode; the lower hanging components are arranged in a group and are embedded at intervals at the lower part of the concrete externally-hung wallboard 1, and the lower hanging components and the upper hanging components are arranged correspondingly; the lower hanging assembly comprises a second hanging plate 10, a first clamping plate 11, a second clamping plate 12, a second vertical reinforcing steel bar 13 and a connecting bolt 14; the second hanging plates 10, the first clamping plates 11 and the second clamping plates 12 are arranged in parallel at intervals along the transverse direction, the second hanging plates 10 are embedded in the concrete external hanging wallboard 1, and the first clamping plates 11 are attached to the vertical tangent planes of the notches 3; the second hanging plate 10, the first clamping plate 11 and the second clamping plate 12 are connected through a connecting bolt 14; a group of second vertical reinforcing steel bars 13 are connected to the plate surface of the second hanging plate 10 at intervals; the lower end of the second vertical reinforcing steel bar 13 exceeds the lower edge of the second hanging plate 10, and the upper end of the second vertical reinforcing steel bar 13 exceeds the upper edge of the second hanging plate 10; the first clamping plate 11 and the second clamping plate 12 on the upper concrete outer wallboard 1 are clamped at two sides of the first hanging plate 4 of the lower concrete outer wallboard 1, and the connecting bolt 14 on the upper layer is clamped in the U-shaped groove 9 on the lower layer.

In this embodiment, the concrete external wall panel 1 includes an outer slat, a heat insulation layer, and an inner slat.

In this embodiment, the first vertical reinforcing steel bar 6 includes an upper vertical section 6.1, a lower vertical section 6.2, and a middle oblique section 6.3; the upper vertical section 6.1 is connected with the first hanging plate 4 by double-seam welding; the length of the inclined section 6.3 is 50mm, so that the lower vertical section 6.2 is positioned in the middle of the inner blade plate of the concrete external wall-hanging panel 1 as much as possible, and the anchoring of the first vertical reinforcing steel bar 6 is facilitated; the angle between the inclined section 6.3 and the upper vertical section 6.1 is 45 deg.

In the embodiment, the depth of the notch 3 is 45 mm-55 mm; the height of the gap 3 is determined according to specific practical projects, and a space for screwing the nut on the connecting bolt 14 in construction is reserved, and is generally 10-15 cm.

In this embodiment, the depth h of the U-shaped groove 9 is not less than (d + 5)/2 +60 mm; h is the depth of the U-shaped groove 9, and d is the diameter of the screw in the connecting bolt 14; 60mm is the operating space when the nut of the connecting bolt 14 is screwed, namely the distance between the axle center of the screw rod of the connecting bolt 14 and the top edge of the U-shaped groove 9; the diameter of the circle where the bottom arc of the U-shaped groove 9 is located is d + 5.

In the embodiment, a reinforcing mesh is arranged inside the concrete external wallboard 1 and at a position close to the inner side surface; the hanging plate 4 is arranged on the outer side of the steel bar mesh, the distance between the hanging plate 4 and the inner side surface of the concrete external wall panel 1 is larger than the sum of the thickness of the steel bar mesh and the thickness of the protective layer, and the diameter of the steel bar of 8mm and the thickness of the protective layer of 20mm are taken as examples and are larger than 36 mm; the height H of the first hanging plate 4 beyond the top surface of the concrete external hanging wall plate 1 is H & gt H.

In this embodiment, vertical caulking grooves 18 are arranged on the plate surface of the second hanging plate 10 at intervals; the second vertical reinforcing steel bars 13 are correspondingly embedded in the caulking grooves 18 and are connected with the second hanging plates 10 in a welding mode.

In this embodiment, the length L of the second vertical reinforcing steel bar 13 beyond the top edge of the second hanging plate 10 is equal to or greater than 35D; d is the diameter of the second vertical reinforcing steel bar 13, and L is the length of the second vertical reinforcing steel bar 13 exceeding the top edge of the second hanging plate 10; the length of the second vertical reinforcing steel bar 13 exceeding the bottom edge of the second hanging plate 10 is 20-50 mm.

In this embodiment, a connecting plate 19 is welded and connected to the outer side surface of the first clamping plate 11; the connecting plate 19 is embedded in the concrete outer wall panel 1.

In the embodiment, the top of the concrete external wallboard 1 is provided with an upper tongue-and-groove 20, and the bottom of the concrete external wallboard 1 is provided with a lower tongue-and-groove 21; the vertically adjacent concrete external wall boards 1 are connected through a tongue-and-groove; sealing glue rods 22 are respectively arranged at the joints and the positions close to the inner side and the outer side of the concrete external wall panel 1.

The construction method of the precast concrete external wallboard system comprises the following steps.

Step one, manufacturing an upper hanging component and a lower hanging component.

And step two, prefabricating the concrete external wall panel 1 in a factory, hanging and connecting the components on the upper embedded part of the concrete external wall panel 1, and hanging and connecting the components on the lower embedded part of the concrete external wall panel 1.

And step three, positioning the concrete external wall panel 1 before installation.

And step four, transporting the concrete external wallboard 1 to a site, hoisting the concrete external wallboard to the installation position, and installing the first clamping plate 11.

And step five, putting the screw rod of the connecting bolt 14 into the U-shaped groove 9 of the upper hanging component of the lower concrete outer hanging wallboard 1, installing the second clamping plate 12, and screwing the nut of the connecting bolt 14.

And step six, erecting and fixing the template of the main body structure.

And seventhly, pouring concrete to finish the construction of the main body structure.