A high-precision in-situ construction method for integral insulation exterior walls without form removal

Abstract

The present invention discloses a high-precision in-situ construction method for an integrated thermal insulation exterior wall without formwork removal. An inner aluminum formwork is laid on the inner side of the wall to form a reference surface for the flatness of the outer side; the outer top aluminum formwork is arranged at the top of the outer side of the wall to form a positioning reference surface, and the graphene thermal insulation board is spliced with the outer top aluminum formwork and with each other and arranged on the outer side of the wall; between the outer top aluminum formwork and the inner aluminum formwork, and between the graphene thermal insulation board and the inner aluminum formwork, a number of tension rod assemblies are used for reinforcement; after the wall reaches the formwork removal condition, the outer top aluminum formwork and the inner aluminum formwork will be removed first, and for the graphene thermal insulation board where the tension rod assemblies are removed, the screw holes are blocked by screw hole plugging thermal insulation nail modules and fixedly connected to the wall. The solution provided by the present invention can achieve the ultra-high-precision installation of the graphene thermal insulation board, ensure the flatness of the outer surface, achieve thin plastering, ensure the appearance and effect of the exterior decoration, and save costs and construction period.

Description

Technical Field

[0001] The present invention relates to the field of ultra-low energy consumption buildings, and in particular to thermal insulation exterior wall technology. Background Art

[0002] In recent years, with the continuous advancement of China's green and low-carbon policies, ultra-low energy consumption buildings have become a hot topic in the construction industry. Ultra-low energy consumption buildings refer to reducing energy consumption as much as possible and lowering the energy consumption level of buildings while ensuring indoor comfort. In this context, the use of an external envelope structure system with good thermal insulation performance is one of the important characteristics of ultra-low energy consumption.

[0003] However, the detachment of external insulation has always been a problem in the external wall insulation system. In order to solve this problem, the existing solution provides an integrated external wall insulation system. This system constructs the insulation layer and the external wall as a whole, effectively avoiding the detachment between the insulation layer and the external wall material.

[0004] For cast-in-place systems, the insulation board is currently widely used as a formwork to achieve a construction process that does not require formwork removal, which not only improves construction efficiency but also reduces construction costs. One of the methods is to use silicon-graphene insulation boards as formwork to achieve integrated exterior wall insulation without formwork removal. For example, this method is commonly used in ultra-low energy consumption buildings in Shanghai. Silicon-graphene insulation board is a new type of insulation material with excellent thermal insulation and mechanical properties. However, due to factors such as the limited strength, large thickness, difficulty in reinforcement, and complex connection between the insulation board and the wall, the surface is prone to unevenness, which leads to difficulties in leveling the facade, increased thickness of the plaster layer, poor decorative effects and appearance, and increased costs and construction periods.

[0005] In the existing cast-in-place thermal insulation exterior wall integrated system, it is difficult to ensure the wall construction accuracy and facade flatness mainly due to the following reasons:

[0006] 1. The mechanical properties of the insulation board are limited: Compared with wooden formwork, aluminum formwork and steel formwork, the rigidity, strength and hardness of the silicon graphene insulation board are limited, which makes it easier to deform when used as an outer formwork, and the PVC sleeves of the top form reinforcement and the tension screw are easily embedded in the insulation board, further affecting the wall thickness and surface flatness.

[0007] 2. Both thickness and weight are large: The thickness of wooden formwork is generally only 12 to 20 mm, while the thickness of the external insulation board of ultra-low energy consumption buildings can reach 100 mm or even thicker, resulting in a large weight of the entire insulation board. Therefore, workers are not flexible enough during installation and alignment is difficult.

[0008] 3. Bottom grout leakage and joint grout leakage: Due to the relatively large thickness of the graphene thermal insulation board, it is difficult to ensure that the joint surfaces are completely flat and straight after factory processing or on-site cutting. As a result, it is difficult for adjacent thermal insulation boards to fit tightly at the joints, and it is also difficult for the bottom of the thermal insulation board to fit tightly with the floor slab, resulting in a common grout leakage problem and forming a long and narrow-shaped structure of thermal bridges between cold and heat.

[0009] 4. Exposed insulation nail caps: An effective connection needs to be formed between the thermal insulation board and the wall; otherwise, there is a risk of the thermal insulation board falling off. Currently, the method of using insulation nails is adopted, but the insulation nail caps are exposed outside the thermal insulation board, further exacerbating the unevenness of the surface.

[0010] For the above reasons, in the actual application process of the existing cast-in-place insulation external wall integrated system without form removal, the external wall thermal insulation board will be contaminated and uneven, and the flatness does not meet the requirements. In this case, a thicker mortar layer generally needs to be used for leveling during the actual application process. Then, the thicker mortar layer will cause the following problems:

[0011] 1. Greatly increase the quality and safety hazards of cracking and falling off of the mortar layer.

[0012] 2. The leveling is difficult, which easily leads to the unevenness of the external decoration base layer, affecting the overall decorative appearance and effect of the building facade.

[0013] 3. Cause cost increase and construction period prolongation.

[0014] Chinese patent application with publication number CN109208816A discloses a building external wall cast-in-place and precast thermal insulation integrated system, which can prefabricate the connection nodes between the precast external wall and the cast-in-place external wall, between the precast external wall and the precast non-load-bearing wall, and between the precast non-load-bearing wall and the cast-in-place external wall, ensuring the structural safety of the connection between the precast thermal insulation external wall panel and the concrete structure. When the solution disclosed in this patent application is implemented, relatively high requirements are put forward for the mechanical properties of the thermal insulation board used, so it can only be applicable to conventional thermal insulation boards (such as wooden formwork, aluminum formwork, and steel formwork, etc.), and it is not applicable to graphene thermal insulation boards with limited stiffness, strength, and hardness; moreover, when this disclosed solution is implemented, there are also problems of surface flatness, difficulty in tightly fitting between the bottom of the thermal insulation board and the floor slab, and causing grout leakage existing in the construction process of the conventional cast-in-place insulation external wall integrated system without form removal. Summary of the Invention

[0015] Aiming at the problem of uneven surface in the existing external wall thermal insulation system using graphene thermal insulation boards as formwork to achieve formwork-free external wall thermal insulation integration, the purpose of the present invention is to provide a high-precision cast-in-place formwork-free external wall thermal insulation integration construction method, which can greatly improve the construction precision and surface flatness for the cast-in-place formwork-free external wall thermal insulation integration system using graphene thermal insulation boards, and can effectively overcome the problems existing in the prior art.

[0016] To achieve the above object, the high-precision cast-in-place formwork-free thermal insulation exterior wall integrated construction method provided by the present invention includes: an upper cast-in-place shear wall and floor slab, a lower cast-in-place shear wall and floor slab, an inner aluminum formwork, a graphene thermal insulation board, an outer top aluminum formwork, a tie rod assembly, and a screw hole plugging thermal insulation nail module;

[0017] The upper cast-in-place shear wall and floor slab are arranged on the lower cast-in-place shear wall and floor slab to form a wall body. The inner side of the wall body is lined with an inner aluminum formwork to form a reference surface for the outer flatness;

[0018] The outer top aluminum formwork is arranged at the outer top of the wall body to form a positioning reference surface. The graphene thermal insulation board is spliced with the outer top aluminum formwork and with each other and laid on the outer side of the wall body. Taking the outer top aluminum formwork as the positioning reference surface, the upper edges of multiple graphene thermal insulation boards are forced to be straightened and fixed;

[0019] Between the outer top aluminum formwork and the inner aluminum formwork, and between the graphene thermal insulation board and the inner aluminum formwork, they are reinforced by a number of tie rod assemblies;

[0020] After the wall body reaches the formwork removal condition, the outer top aluminum formwork and the inner aluminum formwork will be removed first. For the graphene thermal insulation board where the tie rod assembly is removed, the screw holes are plugged by the screw hole plugging thermal insulation nail module and fixedly connected to the wall body.

[0021] In some examples of the present invention, both ends of the screw hole plugging thermal insulation nail module are flush with the surface of the graphene thermal insulation board and the inner surface of the wall body.

[0022] In some examples of the present invention, the graphene thermal insulation board and the outer top aluminum formwork are spliced using a concave-convex rabbet structure.

[0023] In some examples of the present invention, the graphene thermal insulation board and the graphene thermal insulation board are spliced using a concave-convex rabbet structure.

[0024] In some examples of the present invention, the graphene thermal insulation board arranged on the outer side of the upper cast-in-place shear wall and floor slab directly hangs down to the lower cast-in-place shear wall and floor slab and is directly inserted into the rabbet structure of the graphene thermal insulation board arranged on the outer side of the lower cast-in-place shear wall and floor slab.

[0025] In some examples of the present invention, the hanging part of the graphene thermal insulation board is reinforced by using the screw holes that have not been plugged on the lower cast-in-place shear wall and floor slab, and the lower edges of multiple graphene thermal insulation boards are forced to be straightened and fixed.

[0026] In some examples of the present invention, PVC sleeves are arranged at a certain distance between the inner and outer formworks of the wall body, and holes are opened.

[0027] In some examples of the present invention, the PVC sleeve includes a sleeve body and outer edge caps distributed at both ends of the sleeve body.

[0028] In some examples of the present invention, the tension rod assembly includes a perforated steel plate, a tension rod, and nuts. The tension rod passes through the formworks on both sides and the PVC sleeve in the middle thereof. Both ends of the tension rod are sleeved into the perforated steel plate and fastened with nuts.

[0029] In some examples of the present invention, main backing ribs are arranged on the inner side of the aluminum formwork, and secondary backing ribs and main backing ribs are arranged on the side of the graphene thermal insulation board.

[0030] In some examples of the present invention, backing ribs are not required on the inner concrete surface at the hanging part under the thermal insulation board.

[0031] The high-precision in-situ casting and non-demolition thermal insulation external wall integrated construction method provided by the present invention can achieve the ultra-high-precision installation of the graphene thermal insulation board, ensure the flatness of the outer surface, achieve thin plastering, ensure the appearance and effect of the external facade decoration, and save costs and construction period.

[0032] At the same time, the high-precision in-situ casting and non-demolition thermal insulation external wall integrated construction method provided by the present invention can greatly reduce the installation difficulty, and eliminate quality problems such as slurry leakage, structural cold and heat bridges, wall thickness deviation, non-dense plugging of screw holes, thermal insulation board detachment, and external wall leakage. Description of the Drawings

[0033] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0034] Figure 1 It is a three-dimensional view from the first perspective of the high-precision in-situ casting and non-demolition thermal insulation external wall integrated system in an example of the present invention;

[0035] Figure 2 It is a three-dimensional view from the second perspective of the high-precision in-situ casting and non-demolition thermal insulation external wall integrated construction method of the high-precision in-situ casting and non-demolition thermal insulation external wall integrated system in an example of the present invention;

[0036] Figure 3 It is an elevation view of the high-precision in-situ casting and non-demolition thermal insulation external wall integrated construction method of the high-precision in-situ casting and non-demolition thermal insulation external wall integrated system in an example of the present invention;

[0037] Figure 4 It is a side view of the high-precision in-situ casting and non-demolition thermal insulation external wall integrated construction method of the high-precision in-situ casting and non-demolition thermal insulation external wall integrated system in an example of the present invention;

[0038] Figure 5 It is Figure 3 A cross-sectional view in the 1-1 direction;

[0039] Figure 6It is a three-dimensional example diagram of the silicon graphene thermal insulation board in the embodiment of the present invention;

[0040] Figure 7 It is a side view example diagram of the silicon graphene thermal insulation board in the embodiment of the present invention;

[0041] Figure 8 It is a sectional view schematic diagram after the construction of the screw hole plugging thermal insulation nail module in the embodiment of the present invention;

[0042] Figure 9 It is a structure example diagram of the PVC sleeve in the embodiment of the present invention. Specific implementation manner

[0043] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the present invention will be further described below in conjunction with specific drawings.

[0044] Aiming at the problems existing in the existing cast-in-place formwork-free thermal insulation exterior wall integrated system, the present invention provides a high-precision cast-in-place formwork-free thermal insulation exterior wall integrated construction method. This system solution innovatively designs and improves from aspects such as the composition of the silicon graphene thermal insulation board and the formwork, the combined structure of the thermal insulation board and the formwork, and the distribution setting scheme of the silicon graphene thermal insulation board, so as to effectively overcome the problems existing in the prior art.

[0045] On this basis, this solution combines the combined setting scheme of the silicon graphene thermal insulation board and the formwork with the forming state of the exterior wall body, dynamically adjusts the connection and cooperation schemes between the silicon graphene thermal insulation board and the formwork, and between the silicon graphene thermal insulation board and the exterior wall body, so that the formwork for auxiliary installation can be removed first after the wall body reaches the formwork removal condition, while the silicon graphene thermal insulation board is formwork-free and is installed on the wall body with high precision, ensuring the flatness of the outer surface and avoiding damage to the silicon graphene thermal insulation board at the same time.

[0046] The high-precision cast-in-place formwork-free thermal insulation exterior wall integrated construction method provided by the solution of the present invention, for the cast-in-place wall structure composed of the upper wall body and the lower wall body, when constructing the formwork-free silicon graphene thermal insulation board on its outer side, aiming at the problem that the stiffness, strength and hardness of the silicon graphene thermal insulation board are limited and it is more likely to deform when used as the outer formwork at the same time, an innovative formwork reinforcement scheme of organically combining the silicon graphene thermal insulation board and the aluminum formwork is adopted.

[0047] Specifically, the aluminum formwork is used on the inner side of the wall, which can ensure a very high flatness of the inner formwork and serve as the basis for ensuring the flatness of the outer silicon graphene thermal insulation board; at the same time, the outer formwork of the wall adopts the combined use of the silicon graphene thermal insulation board and the aluminum formwork. Through the long-strip positioning aluminum formwork on the upper part of the thermal insulation board, the upper edges of multiple thermal insulation boards are forced to be straightened and fixed, so as to ensure the flatness of the upper part of the exterior wall thermal insulation board.

[0048] Meanwhile, the inner and outer templates of the wall are reinforced by a number of tie rod assemblies; at the same time, the outer aluminum formwork and the inner aluminum formwork of the wall will be removed first after the wall reaches the formwork removal condition, and the graphene insulation board for removing the tie rod assembly will block the screw holes through the screw hole plugging insulation nail module and be fixedly connected to the wall.

[0049] On this basis, the solution of the present invention adopts a rabbet splicing method between the graphene insulation board on the outer side of the wall and the aluminum formwork to construct the outer formwork of the wall.

[0050] Specifically, for the joints between the upper graphene insulation board and the lower aluminum graphene insulation board, the joints between the graphene insulation boards of the same layer, and the joints between the graphene insulation board and the aluminum formwork, a concave-convex rabbet splicing method is adopted, which can greatly reduce the installation difficulty caused by the ultra-thick and overweight insulation board, completely eliminate the risk of grout leakage at the bottom and joints and the resulting structural cold and heat bridges, solve the problem of the offset of adjacent insulation boards, and thus ensure the flatness of the middle part of the external wall insulation board.

[0051] On this basis, when the upper graphene insulation board on the outer side of the wall and the lower aluminum graphene insulation board are spliced in the solution of the present invention, a staggered connection structure is adopted between the graphene insulation boards.

[0052] Specifically, the upper graphene insulation board arranged on the outer side of the wall can be directly hung down from the outer side of the upper wall of the wall to the outer side of the lower wall of the wall and directly inserted into the top rabbet of the lower graphene insulation board distributed on the outer side of the lower wall of the wall, so as to achieve an innovative staggered connection, effectively solving the problems of difficult positioning at the bottom of the insulation board and grout leakage; at the same time, since the hanging part of the upper graphene insulation board is the surface after the formwork of the next layer of aluminum formwork is removed, with extremely high flatness, the unblocked screw holes of the lower layer are used for reinforcement to forcibly straighten and fix the lower edges of multiple insulation boards, thus ensuring the flatness of the bottom of the external wall insulation board.

[0053] On this basis, a number of tie rod PVC sleeves are arranged through the wall in the solution of the present invention for the corresponding tie rods to pass through and reinforce the inner and outer templates of the wall.

[0054] Specifically, a number of tie rod PVC sleeves in this solution are arranged on the wall in an equidistant array, and the specific spacing can be determined according to actual needs.

[0055] Furthermore, the tie rod PVC sleeves in this solution can ensure that they are perpendicular between the outer insulation board and the inner aluminum formwork, ensure that the outer graphene insulation board is parallel to the aluminum formwork, and the ends do not embed into the graphene insulation board with relatively weak hardness, ensuring the wall thickness; at the same time, due to the extremely high flatness of the inner aluminum formwork, the overall flatness of the outer insulation board can be further ensured in combination with the PVC sleeves.

[0056] On this basis, after the wall reaches the form removal condition, the corresponding tie bolts are removed to realize the prior removal of the outer aluminum formwork and the inner aluminum formwork of the wall. For the screw holes on the wall after removing the outer aluminum formwork and the inner aluminum formwork of the wall, and in the case where there is no fixed structure between the graphene thermal insulation board on the outer side of the wall and the wall, the solution of the present invention adopts a modular screw hole plugging thermal insulation nail module to realize the integrated and efficient construction of screw hole plugging, connection between the thermal insulation board and the wall, and exterior wall anti-seepage, prevent the thermal insulation board from falling off, ensure the anti-seepage and airtightness of the exterior wall, and at the same time solve the problem of the exposure of the thermal insulation nail caps.

[0057] For the high-precision in-situ casting formwork-free thermal insulation exterior wall integrated construction method given by the present invention, the following will be further illustrated by specific examples.

[0058] See Figures 1 to 9 , the high-precision in-situ casting formwork-free thermal insulation exterior wall integrated construction method given in this example mainly includes an upper in-situ cast shear wall and a floor 1, a lower in-situ cast shear wall and a floor 2, an inner aluminum formwork 3, a graphene thermal insulation board 4, an outer top aluminum formwork 5, a number of secondary back ribs 6, a number of main back ribs 7, a number of tie bolt assemblies 8, vertical steel bars 9, a number of screw hole plugging thermal insulation nail modules 10, and a number of PVC sleeves 11.

[0059] Among them, the upper in-situ cast shear wall and the floor 1 are arranged on the lower in-situ cast shear wall and the floor 2 to form the corresponding wall.

[0060] On this basis, the inner aluminum formwork 3 is laid on the inner side of the upper in-situ cast shear wall and the floor 1 to form a reference surface for the outer flatness; at the same time, the outer top aluminum formwork 5 is arranged at the outer top of the upper in-situ cast shear wall and the floor 1, thereby forming a positioning reference surface at the outer top of the upper in-situ cast shear wall and the floor 1;

[0061] The graphene thermal insulation board 4 is arranged on the outer side of the upper in-situ cast shear wall and the floor 1. The graphene thermal insulation board 4 is spliced with the outer top aluminum formwork 5 and the adjacent graphene thermal insulation boards 4 on the outer side of the upper in-situ cast shear wall and the floor 1, and with the outer top aluminum formwork 5 as the positioning reference surface, the upper edges of multiple graphene thermal insulation boards are forced to be straightened and fixed.

[0062] Furthermore, between the outer top aluminum formwork 5 arranged on the outer side of the wall and the inner aluminum formwork 3 arranged on the inner side of the wall, and between the graphene thermal insulation board 4 arranged on the outer side of the wall and the inner aluminum formwork 3 arranged on the inner side of the wall, a number of tie bolt assemblies 8 are pre-arranged at a certain interval for reinforcement.

[0063] After the wall reaches the form removal condition, the fixed outer top aluminum formwork 5 and the inner aluminum formwork 3 remove the tie rod assembly, and the outer top aluminum formwork 5 and the inner aluminum formwork 3 are removed first. At the same time, after removing the tie rod assembly, for the screw holes and graphene insulation boards on the wall, a number of screw hole plugging insulation nail modules 10 are used to plug the screw holes respectively, and are fixedly connected to the wall. And the end faces of each screw hole plugging insulation nail module 10 are flush with the outer side of the graphene insulation board and the inner side of the wall respectively.

[0064] In some embodiments of this example, refer to Figures 3 - 5 , the graphene insulation board 4 used in this example specifically includes an upper graphene insulation board 41 and a lower graphene insulation board 42. Further refer to Figures 6 to 7 , the upper and lower graphene insulation boards 41 and 42 of this example are provided with corresponding concave-convex rabbets around them, which can realize the rabbet connection between the upper graphene insulation board 41 and the lower graphene insulation board 42, at the joint of graphene insulation boards of the same layer, and at the joint of the graphene insulation board and the aluminum formwork. This can greatly reduce the installation difficulty caused by the ultra-thick and overweight insulation board, completely eliminate the risk of slurry leakage at the bottom and joints, and the resulting structural cold and heat bridges, and solve the problem of the offset of adjacent insulation boards.

[0065] At the same time, a number of screw holes are provided on each graphene insulation board 4, which are used to cooperate with the tie rod assembly 8 during the initial layout and are butt-connected and fixed to the inner aluminum formwork on the inner side; it is also used to cooperate with the screw hole plugging insulation nail module 10 after part of the formwork can be removed first to realize the connection and fixation with the wall.

[0066] In some embodiments of this example, the upper graphene insulation board 41 and the lower graphene insulation board 42 are spliced and matched, and a staggered connection structure of the insulation board is adopted. Specifically, the upper graphene insulation board 41 arranged on the upper cast-in-place shear wall and floor 1 directly hangs down to the lower cast-in-place shear wall and floor 2, and directly inserts into the top rabbet of the lower graphene insulation board 42 arranged on the outside of the lower cast-in-place shear wall and floor 2. In this way, the upper graphene insulation board 41 can cover the joint between the upper cast-in-place shear wall and floor 1 and the lower cast-in-place shear wall and floor 2 (such as Figure 4 and Figure 5 shown), thus effectively solving the problems of difficult bottom positioning and slurry leakage of the insulation board; at the same time, since the hanging part of the insulation board is the surface after the formwork of the next layer is removed, the flatness is extremely high. The lower unblocked screw holes are used for reinforcement to forcibly straighten and fix the lower edges of multiple insulation boards, so as to ensure the flatness of the bottom of the external wall insulation board.

[0067] Preferably, the connection position of the upper graphene board 41 and the lower graphene board 42 is about 300 - 600 mm below the middle floor.

[0068] In some embodiments of this example, after the construction of the lower cast-in-place shear wall and the floor slab 2 is completed, when the wall reaches the formwork removal condition, part of the aluminum formwork can be removed first, and the lower graphene insulation board 42 does not require formwork removal. The screw hole plugging insulation nail module 10 is used to perform the integrated and efficient construction of screw hole plugging, connection between the insulation board and the wall, and exterior wall leakage prevention.

[0069] See Figure 8 , the screw hole plugging insulation nail module 10 in this example includes a graphene end 101, an insulation nail skeleton 102, a waterproof gasket 103, and grouting material 104.

[0070] Among them, one end of the nail cap of the insulation nail skeleton 102 is placed inside the graphene end 101. The width of the graphene end 101 is equal to the thickness of the graphene insulation board 4. It consists of a cylinder with a larger outer diameter and a cylinder with a smaller inner diameter. During processing, the insulation nail skeleton 102 is placed in a mold and formed by extrusion molding to integrate the graphene end 101 and the insulation nail skeleton 102.

[0071] A cylindrical waterproof gasket 103 can be sleeved on the middle part of the insulation nail skeleton 102, which can be made of materials such as water-swellable rubber. The other end of the insulation nail skeleton 102 has barbs to improve the anti-pulling performance.

[0072] As an example, the corresponding process of the screw hole plugging insulation nail module 10 thus formed during specific construction is as follows:

[0073] First, the waterproof gasket 103 is sleeved on the insulation nail skeleton 102, and then the integrated component of the graphene end 101 and the insulation nail skeleton 102, together with the waterproof gasket 103, is inserted into the screw hole until the outer side is flush with the graphene surface;

[0074] Then, high-strength slurry is used for grouting and plugging on the other side of the screw hole. When the grouting material reaches the design strength, an anchoring end of the insulation nail is formed, and the insulation nail can firmly connect the graphene insulation board 4 and the wall. At the same time, a continuous insulation surface is formed on the outer insulation board to eliminate the structural cold and heat bridge.

[0075] In some embodiments of this example, after the steel bars of the upper shear wall are tied, formwork support begins. The inner side of the wall uses the inner aluminum form 3, and the outer side uses a combination of the graphene insulation board 4 and the outer top aluminum form 5.

[0076] Meanwhile, for the lower part of the outer side, the upper graphene thermal insulation board 41 is used as a formwork and is hung down to the next lower layer. Its bottom tongue-and-groove can be directly inserted into the top tongue-and-groove of the lower graphene thermal insulation board 42, achieving easy positioning of the bottom of the thermal insulation board and eliminating the problem of slurry leakage at the bottom. Moreover, for the hanging part of the upper graphene thermal insulation board 41, the base is the surface after the formwork on the outer side of the next lower layer is removed, with extremely high flatness. By using the unblocked screw holes at this part for reinforcement, the lower edges of multiple thermal insulation boards can be forced to be straightened and fixed to ensure the flatness of the lower part of the outer thermal insulation board.

[0077] For the upper part of the outer side, the outer top formwork 5 is used. It is in a long strip shape, and its bottom tongue-and-groove is inserted into the top tongue-and-groove of the upper graphene thermal insulation board 41. When specifically fixing, a tie rod is used to reinforce the formworks on the inner and outer sides of this part. In this way, the upper edges of multiple thermal insulation boards can be forced to be straightened and fixed, thus ensuring the flatness of the upper part of the exterior wall thermal insulation board.

[0078] In some embodiments of this example, for the space between the inner and outer formworks of the wall, PVC sleeves 11 are arranged according to certain spacing requirements, and openings are made to facilitate the passing of tie rods. Such PVC sleeves 11 are distributed in an equidistant array form.

[0079] See Figure 9 , the two ends of the PVC sleeve 11 in this example are provided with outer edge caps, which can ensure its perpendicularity between the inner and outer formworks, ensure the parallelism between the outer formwork and the inner formwork, and the ends do not embed into the relatively soft thermal insulation board. This can ensure the wall thickness, and since the flatness of the inner formwork is extremely high, the overall flatness of the outer formwork is guaranteed through the PVC sleeve 11 with this as the reference surface.

[0080] Based on the set PVC sleeves 11, the inner and outer formworks are reinforced by a number of tie rod assemblies 8. A number of tie rod assemblies 8 are respectively passed through the corresponding PVC sleeves 11, and both ends of each tie rod assembly 8 extend from both ends of the corresponding PVC sleeve 11 to fix the inner and outer formworks.

[0081] In some embodiments of this example, see Figure 2 , the tie rod assembly 8 in this example includes a perforated steel plate 81, a tie rod 82, and a nut 83. Specifically, the tie rod 82 passes through the two side formworks and the PVC sleeve 11 in the middle. A backing strip is installed on the outer side of the formwork, the perforated steel plate 81 is sleeved, and the nut 83 is used for fastening.

[0082] See Figure 1 And Figure 3 , the specific setting scheme of the backing strip in this example is that only the main backing strip 7 is set on the formwork side of the aluminum formwork, while the secondary backing strip 6 and the main backing strip 7 need to be set on the thermal insulation board side, and the backing strip is not required on the inner concrete surface of the hanging part of the thermal insulation board.

[0083] Based on the foregoing solution, after the formwork of this example is completed, methods such as inclined struts and cables are adopted for precise positioning and reinforcement. The vertical steel bars 9 of the shear wall should protrude a part after the binding of the main steel bars of the entire floor structure, the embedding of pipelines, and the completion of the formwork system, so as to facilitate the connection and binding of the steel bars of the next floor. After the concrete is poured, the formwork is removed after the concrete strength reaches the required strength, and the integrated and efficient construction of plugging the screw holes, connecting the insulation board to the wall, and preventing the external wall from leaking is carried out as described above, and the construction of the next floor is carried out in a cycle.

[0084] As a further example, for the integrated construction method of the high-precision cast-in-place insulation external wall without formwork removal given in this example, in actual application, the corresponding construction process is as follows:

[0085] 1. Setting the rabbet of the insulation board: The concave and convex rabbets on the graphene board can be set through a mold during the processing of the insulation board, or can be opened using specific tools after cutting on site;

[0086] 2. Laying out lines, chiseling the concrete rough at the floor slab, and binding the steel bars;

[0087] 3. Installing formwork, using aluminum formwork on the inner side of the wall, and using a combination of graphene insulation board and aluminum formwork on the outer side;

[0088] 4. Setting PVC sleeves as required between the inner and outer formworks, setting the backing bars, and using tie rods for reinforcement;

[0089] 5. After the formwork installation is completed, methods such as inclined struts and cables are adopted for precise positioning and reinforcement;

[0090] 6. Pouring concrete after the binding of the main steel bars of the entire floor structure, the embedding of pipelines, and the completion of the formwork system;

[0091] 7. Removing the aluminum formwork after the concrete strength of the wall reaches the required strength, and the graphene insulation board does not need to have its formwork removed;

[0092] 8. Carrying out the integrated and efficient construction of plugging the screw holes, connecting the insulation board to the wall, and preventing the external wall from leaking.

[0093] As can be seen from the above example, compared with the prior art where only the graphene insulation board with limited stiffness and hardness is used as the outer formwork on the outside, due to the large thickness and weight of the graphene insulation board, it is difficult to install accurately, and there are no effective measures to ensure the flatness of the insulation board; in the solution of the present invention, aluminum formwork is used on the inner side of the wall to form a reference surface for the flatness on the outside, and a combination of graphene insulation board and aluminum formwork is used on the outside, and the upper edges of multiple insulation boards are forced to be straightened and fixed to ensure the upper flatness.

[0094] In contrast to the prior art, the existing method involves placing them side by side, which poses a risk of grout leakage at the bottom and joints, easily forming a narrow and long-shaped structure of thermal bridges, and adjacent insulation boards are prone to uneven steps; in the solution of the present invention, at the joints between upper and lower layers of insulation boards, at the joints of insulation boards on the same layer, and at the joints between insulation boards and aluminum formwork, a concave-convex tongue-and-groove jointing method is adopted, greatly reducing the installation difficulty caused by the ultra-thick and heavy insulation boards and eliminating the problem of grout leakage.

[0095] In contrast to the prior art, when splicing upper and lower layers of insulation boards at the bottom of the wall, there are problems of difficult positioning at the bottom of the insulation board and grout leakage; in the solution of the present invention, the insulation boards are staggered and connected. The upper layer of insulation board hangs down to the lower layer and can be directly inserted into the top tongue-and-groove of the lower layer of insulation board. By using the flat surface after removing the formwork of the lower layer of aluminum formwork, the lower edges of multiple insulation boards are forced to be straightened and fixed to ensure the flatness of the lower part.

[0096] In contrast to the prior art, it is easy to cause the PVC casing to tilt, and the end is easily embedded in the insulation board with relatively weak hardness, resulting in deviation of the wall thickness and difficulty in controlling the flatness of the outer insulation board; the PVC casing adopted in the solution of the present invention improves the flatness of the insulation board by ensuring the parallelism between the outer insulation board and the aluminum formwork;

[0097] In contrast to the prior art, the plugging of screw holes requires separate construction, which is prone to incomplete plugging, resulting in problems such as leakage and poor airtightness, or forming a dot-shaped structure of thermal bridges, and the exposed insulation nail caps will exacerbate the unevenness of the surface of the insulation board; the modular screw hole plugging insulation nails given in the solution of the present invention can achieve the integrated and efficient construction of screw hole plugging, connection between the insulation board and the wall, and external wall leakage prevention, and at the same time solve the problem of exposed insulation nail caps.

[0098] In summary, the high-precision cast-in-place insulation exterior wall integrated construction method given by the present invention has the following advantages compared with the prior art:

[0099] 1) The construction accuracy and surface flatness are greatly improved.

[0100] 2) The positioning and installation difficulty of the insulation board are reduced.

[0101] 3) The installation efficiency of the insulation nails and the plugging efficiency of the screw holes are improved.

[0102] 4) The construction quality is improved, and quality problems such as grout leakage, structural thermal bridges, wall thickness deviation, incomplete plugging of screw holes, insulation board detachment, and external wall leakage are avoided.

[0103] 5) Thin plastering is realized, and costs are saved.

[0104] 6) The decorative effect and appearance of the exterior facade are improved.

[0105] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision cast-in-place non-demolition formwork thermal insulation external wall integrated construction method, characterized in that, including: including the upper cast-in-place shear wall and floor slab, the lower cast-in-place shear wall and floor slab, the inner aluminum formwork, the graphene thermal insulation board, the outer top aluminum formwork, the tie rod assembly, and the screw hole plugging thermal insulation nail module; The upper cast-in-place shear wall and floor slab are arranged on the lower cast-in-place shear wall and floor slab to form a wall, and the inner aluminum formwork is laid on the inner side of the wall to form a reference surface for the outer flatness; The outer top aluminum formwork is arranged on the outer top of the wall to form a positioning reference surface. The graphene thermal insulation board is spliced with the outer top aluminum formwork and with each other on the outer side of the wall, and with the outer top aluminum formwork as the positioning reference surface, the upper edges of multiple graphene thermal insulation boards are forced to be straightened and fixed; The graphene thermal insulation board specifically includes an upper graphene thermal insulation board and a lower graphene thermal insulation board, and the upper graphene thermal insulation board and the lower graphene thermal insulation board are spliced and matched with each other, adopting a staggered connection structure for the thermal insulation boards. The hanging part of the upper graphene thermal insulation board has a very flat surface as the surface after the formwork of the next layer of outer aluminum formwork is removed. The screw holes that have not been plugged in this part are used for reinforcement, and the lower edges of multiple thermal insulation boards are forced to be straightened and fixed; Between the outer top aluminum formwork and the inner aluminum formwork, and between the graphene thermal insulation board and the inner aluminum formwork, several tie rod assemblies are used for reinforcement; The outer top aluminum formwork and the inner aluminum formwork will be removed first after the wall reaches the formwork removal condition, and the screw holes of the graphene thermal insulation board where the tie rod assembly is removed are plugged by the screw hole plugging thermal insulation nail module and fixedly connected to the wall.

2. The high-precision cast-in-place non-demolition formwork thermal insulation external wall integrated construction method according to claim 1, characterized in that, Both ends of the screw hole plugging thermal insulation nail module are flush with the surface of the graphene thermal insulation board and the inner surface of the wall.

3. The high-precision cast-in-place non-demolition formwork thermal insulation external wall integrated construction method according to claim 1, characterized in that, An uneven rabbet structure is adopted for splicing between the graphene thermal insulation board and the outer top aluminum formwork.

4. The high-precision cast-in-place non-demolition formwork thermal insulation external wall integrated construction method according to claim 1, characterized in that, An uneven rabbet structure is adopted for splicing between the graphene thermal insulation board and the graphene thermal insulation board.

5. The high-precision cast-in-place non-demolition formwork thermal insulation external wall integrated construction method according to claim 1, characterized in that, The graphene thermal insulation board arranged on the outside of the upper cast-in-place shear wall and floor slab directly hangs down to the lower cast-in-place shear wall and floor slab and directly inserts into the rabbet structure of the graphene thermal insulation board arranged on the outside of the lower cast-in-place shear wall and floor slab.

6. The high-precision cast-in-place non-demolition formwork thermal insulation external wall integrated construction method according to claim 1, characterized in that, PVC sleeves are arranged between the inner and outer formworks of the wall at a certain interval and openings are provided.

7. The high-precision cast-in-place non-demolition formwork thermal insulation external wall integrated construction method according to claim 6, characterized in that, The PVC sleeve includes a sleeve body and outer edge caps distributed at both ends of the sleeve body.

8. The high-precision cast-in-place non-demolition formwork thermal insulation external wall integrated construction method according to claim 6, It is characterized in that the tie rod assembly includes a perforated steel plate, a tie rod and nuts. The tie rod passes through the formworks on both sides and the PVC sleeve in the middle. Both ends of the tie rod are sleeved into the perforated steel plate and fastened with nuts.

9. The high-precision in-situ cast non-demolition heat-insulating exterior wall integrated construction method according to claim 1, It is characterized in that main backing ribs are arranged on the inner side of the aluminum formwork, and secondary backing ribs and main backing ribs are arranged on the side of the graphene heat-insulating board.

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