Thermal-insulation anti-crack semi-prefabricated externally-hung wallboard

Abstract

The utility model discloses a thermal-insulation anti-crack semi-prefabricated externally-hung wallboard which comprises an outer acanthus, a thermal-insulation layer and an inner acanthus which are arranged in sequence, the outer acanthus is made of anti-crack fiber mortar, and the thickness of the outer acanthus is 15-20 mm; the heat preservation layer is made of hard foaming polyurethane, the thickness of the heat preservation layer ranges from 40 mm to 50 mm, and the heat preservation layer is sprayed on the inner surface of the outer acanthus. The inner acanthus is made of fine aggregate concrete, the thickness of the inner acanthus is 40-50 mm, and the inner acanthus is formed in a construction site in a spraying mode. Lower chord ribs of the truss steel bars are arranged in the outer acanthus, upper chord ribs of the truss steel bars are arranged in the inner acanthus, one end of each steel connecting piece is arranged in the outer acanthus, and the other end of each steel connecting piece penetrates through the outer acanthus, the heat preservation layer and the inner acanthus to the outside. The connecting piece is used for being fixedly connected with a pre-buried connecting piece on a main body structure. The method is high in production efficiency, good in finished product quality and convenient to construct and install.

Description

TECHNICAL FIELD

[0001] The utility model relates to prefabricated building technical field, concretely relates to a kind of thermal insulation anti-cracking semi-precast external wall panel. BACKGROUND

[0002] Building envelope system includes building envelope wall structure, building energy-saving insulation system and building exterior decoration system, and is the important component of building windbreak, rainproof, resist the influence of external environment.

[0003] The production method of prefabricated concrete sandwich thermal insulation external wall panel is mainly divided into reverse beating method and positive beating method, but both have deficiencies. Reverse beating method needs formwork to transport and assemble and disassemble, resulting in low production efficiency, and the stress of puller is too large when demolding, which may be pulled out. Positive beating method has poor finishing degree and smoothness, and the surface is easy to crack, especially in cold northern areas. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of thermal insulation anti-cracking semi-precast external wall panel, solve the problems, such as easy cracking of external wall panel in prior art, high maintenance cost, poor thermal insulation performance and poor durability, can significantly improve the thermal insulation performance and construction quality of wall, and have excellent durability and decoration effect.

[0005] In order to solve the above technical problems, the utility model provides a kind of thermal insulation anti-cracking semi-precast external wall panel, which comprises outer leaf plate, thermal insulation layer and inner leaf plate arranged in sequence;The outer leaf plate is made of anti-cracking fiber mortar, and the thickness is 15-20mm;The thermal insulation layer is made of hard foam polyurethane, and the thickness is 40-50mm, which is sprayed on the inner surface of the outer leaf plate;The inner leaf plate is made of fine stone concrete, and the thickness is 40-50mm, which is formed by spraying at construction site.

[0006] It also includes truss reinforcement and steel connecting piece, the bottom chord of the truss reinforcement is arranged in the outer leaf plate, the top chord of the truss reinforcement is arranged in the inner leaf plate, one end of the steel connecting piece is arranged in the outer leaf plate, the other end passes through the outer leaf plate, the thermal insulation layer and the inner leaf plate to the outside, and is used for fixed connection with the embedded connecting piece on the main structure.

[0007] Further, the steel connecting piece includes embedded plate and angle steel arm, the embedded plate is arranged in the outer leaf plate, one end of the angle steel arm is fixedly connected with the embedded plate, and the other end passes through the outer leaf plate, the thermal insulation layer and the inner leaf plate to the outside.

[0008] Further, the embedded plate is welded with the bottom chord of the truss reinforcement, steel wire mesh fence is arranged on the embedded plate, the steel wire mesh fence is arranged on the outer periphery of the angle steel arm, and the top of the steel wire mesh fence is flush with the surface of the thermal insulation layer on the inner leaf plate side.

[0009] Further, the gap between the heat preservation layer and the upper chord of the truss steel is 10-15mm.

[0010] Further, the upper chord of the plurality of truss steels is provided with a steel mesh.

[0011] Further, the anti-cracking fiber mortar of the outer leaf plate is poured into the web of the truss steel and wraps the lower chord in the wall mold, ensuring that the thickness of the outer leaf plate is 15-20mm, and the anti-cracking fiber mortar is poured in the steel wire mesh area, so that the steel connecting piece is wrapped.

[0012] Further, the gap between the heat preservation layer surface and the bottom of the upper chord is 10-15mm.

[0013] Further, the inner leaf plate surface is smoothed using 1:3 cement mortar to form a finishing layer.

[0014] Further, the distance between the two adjacent truss steels is not greater than 600mm.

[0015] The beneficial effects of the utility model are:

[0016] I. The inner leaf plate can be prepared on site, so the remaining part is light in weight when pre-prepared in the factory, does not need to repeatedly disassemble and assemble the formwork, reduces the transportation and installation difficulty, and improves the production efficiency;

[0017] II. The truss steel has large sectional area, ensures that the puller of the outer hanging wall plate will not be pulled out when demolding, and has high shear efficiency;

[0018] III. The outer leaf plate is made of anti-cracking fiber mortar, and has good surface flatness and compactness, and no surface cracking phenomenon;

[0019] IV. The inner leaf layer is made of sprayed concrete in the on-site construction, the heat preservation layer is located between the inner leaf layer and the outer leaf plate, and the heat preservation, durability and fire resistance are considered. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure schematic diagram of the heat preservation and anti-cracking semi-precast outer hanging wall plate of the utility model.

[0021] Figure 2 It is a flow chart in the preparation process of the utility model;

[0022] Figure 3 It is a truss steel swing schematic diagram of the utility model;

[0023] Figure 4 It is a structure schematic diagram of the outer leaf plate after preparation of the utility model;

[0024] Figure 5 It is a structure schematic diagram of the heat preservation layer after preparation of the utility model;

[0025] Figure 6 It is the structure schematic diagram after the reinforcing mesh is bound. DETAILED DESCRIPTION

[0026] Referring to Figures 1 to 6 The embodiment of the heat preservation and anti-crack semi-precast external hanging wallboard of the utility model, including factory prefabricated outer leaf plate 1 and site preparation inner leaf layer 7, the inner surface of outer leaf plate is provided with heat preservation layer 2, the above structure is prefabricated in factory, and the complete external hanging wallboard is obtained by carrying out secondary construction on site, the mode of making in stages can guarantee that the prefabricated part is light in weight, and the transportation and hoisting process are relatively convenient.

[0027] Still pre-buried in the outer leaf plate is steel connecting piece 4 fixedly connected with the main body structure, and fixedly connected with the pre-buried connecting piece on the main body structure, realizes the external hanging effect, the outer leaf plate is connected with the inner leaf plate through truss reinforcement 3, the truss reinforcement is used to firmly connect the outer leaf plate, the heat preservation layer and the inner leaf plate together, and the truss reinforcement has high shearing efficiency, the truss reinforcement and steel connecting piece not only act as connecting pieces between layers, but also act as the framework of inner and outer leaf wallboard, form two lines of defense, greatly increase the safety of wall body;The steel connecting piece is composed of pre-buried plate and angle steel arm, the angle steel arm is welded and fixed with the pre-buried plate, the pre-buried plate is arranged in the outer leaf plate, and can be welded and fixed with the truss reinforcement, the angle steel arm passes through the outer leaf plate, the heat preservation layer, the inner leaf plate to the outside, the structure is simple, and the material is easy to obtain, guaranteeing the connecting strength.

[0028] Based on the above structure, referring to Figure 2 The preparation method has the following steps:

[0029] First, factory prefabrication, specifically, on the steel platform floor layout side edge mold, wall mold, then placed in the wall mold reinforcement cover block 111, on the reinforcement cover block placed multiple truss reinforcement, reinforcement cover block material is fiber, easy to combine with the subsequent pouring material firmly, the spacing between adjacent two truss reinforcement is not more than 600mm, to ensure the overall strength; one end of the steel connector and the truss reinforcement chord in the mold is welded, and a steel mesh fence 5 is provided around the embedded plate, the steel mesh fence can form a circular ring, which can be welded on the embedded plate, the top of the steel mesh fence is flush with the surface of the insulation layer, which can mark the height and does not affect the effect of the site construction; in the wall mold, the anti-cracking fiber mortar is poured to the truss reinforcement web and wrapped around the chord, the thickness of the outer leaf plate formed by pouring the anti-cracking fiber mortar to the truss reinforcement web is 15-20mm, which can effectively reduce the weight and ensure the overall strength, the anti-cracking fiber mortar is poured in the steel mesh fence area to wrap the steel connector, and the outer leaf plate is obtained by one-time forming and steam curing; after the anti-cracking fiber mortar solidifies, the outer leaf plate is sprayed with hard foamed polyurethane to form an insulation layer below the top chord of the truss reinforcement, the thickness of the insulation layer is 40-50mm, and the gap between the bottom of the top chord and the surface of the insulation layer is controlled to be 10-15mm; after the foamed polyurethane solidifies, the steel mesh 6 is tied on the surface of the top chord of the truss reinforcement, the aperture of the steel mesh is 100mm x 100mm, the prefabricated external wall panel is formed, and the prefabrication is completed.

[0030] Then, the site construction is carried out, the prefabricated external wall panel is demolded and transported from the factory to the construction site, and the steel connector on the prefabricated external wall panel is connected and fixed with the embedded connector on the main structure; then, the steel mesh is sprayed with fine stone concrete, and the fine stone concrete is hung between the steel mesh and the insulation layer and on the surface of the steel mesh; after the fine stone concrete solidifies, the inner leaf plate is formed, and the thickness of the inner leaf layer is 40-50mm; finally, the surface of the inner leaf plate is smoothed with 1:3 cement mortar to form a finishing layer, and the preparation and construction are completed.

[0031] Based on the above prefabrication and site construction, the following advantages are shown:

[0032] 1. Good weather resistance: the outer leaf plate of the house external wall panel is prefabricated in the factory, and the outer leaf plate is obtained by one-time forming and steam curing of anti-cracking fiber mortar, which can completely achieve the same service life as the structure and avoid the quality problems such as hollowing and cracking of traditional painting.

[0033] 2. Better decorative effect: the external wall is divided according to the design requirements, and the dividing line can be positioned by computer, and the finishing flatness and density are significantly better than traditional painting. The outer finish can be painted with metal paint according to the design, and the decorative effect is equivalent to that of aluminum plate curtain wall.

[0034] 3. Good component integrity, stronger building seismic performance: the outer enclosure wall, door and window opening, wall insulation can be integrally prefabricated, the outer hanging wall and the main structure use special hanging parts, the connection is more reliable, the component integrity is higher, and the building seismic performance is stronger; the traditional outer wall and the main structure are connected by mortar, which is a rigid connection and has large stiffness, and shear failure between the main structure and the outer wall is easy to occur during earthquake, which is contrary to the principle of seismic design, the outer hanging plate of the application is connected with the main structure through the hanging part, and there is a flexible deformation space between the plates, so that the main structure will not be damaged during earthquake, so that the seismic performance is more reasonable than that of the rigid connection wall.

[0035] 4. Better promote green construction: factory prefabrication can be carried out, and inner leaf plates are prepared on the construction site, without wall masonry and twice structure construction, which maximally reduces the formwork, construction labor, material loss, construction dust and construction water, and achieves the purpose of green construction.

[0036] 5. Fewer quality defects: the outer wall and the secondary structure of the design are prefabricated in the factory, and the construction site does not need secondary structure and infilled wall construction, which maximally avoids wall cracks, painting cracks, insulation falling and other quality defects, and maximally guarantees the engineering quality; the construction progress is also accelerated; since a large number of components are manufactured and maintained in the prefabrication factory, the quality of construction workers, construction machines, construction environment, process quality assurance system and component maintenance environment are essentially improved compared with the construction site, and all component manufacturing processes can be monitored by video, the quality formation process can be traced, and many traditional construction quality defects can be avoided.

[0037] 6. Higher assembly rate: the overall assembly rate is increased to more than 60%.

[0038] 7. Shorter construction period and lower cost: the construction period is shortened by about 10%, and the civil structure engineering cost is reduced by 5%.

[0039] The above-described embodiments are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art based on the present application are within the protection scope of the present application. The protection scope of the present application is subject to the claims.

Claims

1. A heat-insulating anti-crack semi-precast external wall panel, characterized in that, The outer leaf plate, the thermal insulation layer and the inner leaf plate are sequentially arranged; the outer leaf plate is made of anti-crack fiber mortar and has a thickness of 15-20 mm; the thermal insulation layer is made of rigid foamed polyurethane and has a thickness of 40-50 mm and is sprayed on the inner surface of the outer leaf plate; and the inner leaf plate is made of fine stone concrete and has a thickness of 40-50 mm and is formed by spraying at the construction site. The steel connecting piece is provided with a pre-embedded plate and an angle steel arm, the pre-embedded plate is arranged in the outer leaf plate, one end of the angle steel arm is fixedly connected with the pre-embedded plate, and the other end of the angle steel arm penetrates through the outer leaf plate, the thermal insulation layer and the inner leaf plate to the outside and is used for fixedly connecting with the pre-embedded connecting piece on the main body structure.

2. The heat-insulating anti-cracking semi-precast external wall panel according to claim 1, characterized in that, The pre-embedded plate is welded with the lower chord of the truss steel bar, the pre-embedded plate is provided with a steel mesh fence, the steel mesh fence is arranged on the outer periphery of the angle steel arm, and the top of the steel mesh fence is flush with the surface of the thermal insulation layer on the side of the inner leaf plate.

3. The heat-insulating anti-cracking semi-precast external wall panel according to claim 2, characterized in that, The gap between the thermal insulation layer and the upper chord of the truss steel bar is 10-15 mm.

4. The heat-insulating anti-cracking semi-precast external wall panel according to claim 1, characterized in that, The upper chords of the plurality of truss steel bars are provided with steel mesh sheets.

5. The heat-insulating anti-cracking semi-precast external wall panel according to claim 1, characterized in that, The gap between the surface of the thermal insulation layer and the bottom of the upper chord is 10-15 mm.

6. The heat-insulating anti-cracking semi-precast external wall panel according to claim 1, characterized in that, The surface of the inner leaf plate is smoothed by using 1:3 cement mortar to form a finishing layer.

7. The heat-insulating anti-cracking semi-precast external wall panel according to claim 1, characterized in that, The distance between the adjacent two truss steel bars is not greater than 600 mm.

8. The heat-insulating anti-cracking semi-precast external wall panel according to claim 1, characterized in that, ​

Images