Prefabricated concrete sandwich heat preservation shear wall opposite-pull connection structure and construction method

Abstract

The invention discloses a prefabricated concrete sandwich heat preservation shear wall opposite-pull connection structure and a construction method, and belongs to the field of buildings. Comprising a prefabricated concrete sandwich heat preservation shear wall outer acanthus, a heat preservation layer, a prefabricated concrete sandwich heat preservation shear wall inner acanthus, an inner acanthus lossless opposite-pull piece, a cast steel nut, a keel, an aluminum mold, an opposite-pull screw and a reinforcing back ridge, and the prefabricated concrete sandwich heat preservation shear wall outer acanthus, the heat preservation layer and the prefabricated concrete sandwich heat preservation shear wall inner acanthus are sequentially arranged; the lossless opposite-pulling embedded part and slab joint opposite-penetrating screw combined connecting system is designed, in the construction process, the lossless opposite-pulling embedded threaded sleeve and the matched screw form a pulling structure, and meanwhile, the opposite-pulling screw and the outer side reinforcing back edge at the abutted seam between the slabs are connected in a reinforcing mode; and lossless construction in the mounting process of the fabricated concrete shear wall and the concrete pouring process of the edge member can be realized.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to a prefabricated concrete sandwich insulation shear wall tension connection structure and a construction method. Background Art

[0002] The proportion of prefabricated buildings in my country's newly built buildings is steadily increasing due to their advantages such as high construction efficiency, quality control, environmental protection and energy saving. Prefabricated shear walls are a commonly used structural system for high-rise residential buildings because of their good seismic performance and easy realization of spatial regularity. However, the existing prefabricated sandwich insulation shear wall method is still relatively traditional, with low functional integration, and usually requires on-site installation and casting of edge components before finishing operations can be carried out. In recent years, with the vigorous promotion of the country's dual carbon policy, prefabricated shear walls that integrate structure, insulation, decoration and other multifunctional integration have gradually received attention, but there is still a problem of mismatch between construction technology and design research and development, which limits the promotion and application of multifunctional integrated prefabricated shear walls.

[0003] At present, the on-site construction of the edge components of prefabricated shear walls generally adopts a combination of aluminum molds and tension screws. Therefore, a large number of through holes need to be reserved in the prefabricated wall panels, and the sealing and waterproofing construction are carried out after the edge components are poured. Even though the sealing of the through screw holes has formed a standardized operation process, the following problems still exist during the use of the building: First, the quality of the sealing of the tension screw holes is unstable, which is heavily dependent on the technical proficiency and sense of responsibility of the operators, and it is easy to cause rainwater leakage and cold and hot bridge problems on the exterior wall, affecting the durability and energy-saving effect of the building; third, when the concrete of the edge components is poured on site, it is easy to cause pollution to the integrated exterior finish; third, even if the hole sealing quality meets the requirements, the prefabricated shear wall still has the problem of functional discontinuity, which is not conducive to the realization of the structural insulation and decoration integrated functions of the multifunctional integrated prefabricated shear wall.

[0004] To solve this problem, some scholars have conducted relevant research. For example, patent 202410801741.3 proposes a tension connection structure for precast concrete sandwich insulation shear walls. However, in order to avoid the problems of mold expansion and insulation layer debonding that may occur during construction, a single-piece sandwich insulation shear wall usually requires a total of about 20 sets of lossless tension embedded parts to be embedded in the outer blade and the inner blade, which significantly increases the cost. Therefore, the present invention proposes a new lossless tension connection structure and construction method. Summary of the invention

[0005] In view of the problems mentioned in the background technology, the purpose of the present invention is to provide a precast concrete sandwich insulation shear wall tension connection structure and a construction method to solve the problems mentioned in the background technology.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A precast concrete sandwich insulation shear wall tension connection structure comprises a precast concrete sandwich insulation shear wall outer blade, an insulation layer, a precast concrete sandwich insulation shear wall inner blade, inner blade non-destructive tension members, cast steel nuts, a keel, an aluminum mold, tension screws, and a reinforcing back rib. The precast concrete sandwich insulation shear wall outer blade, the insulation layer, and the precast concrete sandwich insulation shear wall inner blade are arranged in sequence. The precast concrete sandwich insulation shear wall inner blade is provided with a pre-embedded threaded sleeve, a threaded screw is provided in the threaded sleeve, and the threaded sleeve and the threaded screw constitute a plastic sleeve. The plastic sleeve is fixed to the keel through a cast steel nut to form an inter-plate joint tension screw connection structure, and the aluminum mold is located outside the threaded sleeve.

[0008] The invention also discloses a construction method of a prefabricated concrete sandwich insulation shear wall tension connection structure, comprising the following steps:

[0009] S1. Prefabricated shear walls in factories;

[0010] S2. On-site installation and fixation of non-destructive tension structure;

[0011] S3. Installation and fixation of the tension structure between the panels;

[0012] S4, pouring concrete in the post-casting area of ​​edge components;

[0013] S5. Remove the intact tension screws and the tension screws in the joints between plates and seal them.

[0014] Preferably, in S1, when the prefabricated shear wall is prefabricated in the factory, the outer blade of the precast concrete sandwich insulation shear wall including the exterior facing, the insulation layer, and the inner blade of the precast concrete sandwich insulation shear wall are prefabricated in the factory according to the design, and the threaded sleeve is embedded in the outer blade of the precast concrete sandwich insulation shear wall during the component prefabrication process.

[0015] Preferably, in S2, when the non-destructive tension structure is installed and fixed on site, the plastic sleeve is installed first, and then the screw is screwed into the threaded sleeve and fixed to the keel by the cast steel nut, thereby completing the installation and fixation of all non-destructive tension parts.

[0016] Preferably, in S3, when installing and fixing the tension structure between the panels, the tension screws are extended from the reserved holes in the aluminum mold, passed through the joints between the assembled shear wall panels, and the plastic sleeves are installed and fixed to the outer reinforcing back ribs and the inner keels through nuts to form the tension screw connection structure between the panels.

[0017] Preferably, in S4, when pouring concrete in the post-casting area of ​​the edge member, after completing the on-site installation of all non-destructive tension members, concrete is poured in the post-casting area of ​​the edge member, utilizing the lateral restraint provided by the non-destructive tension connection and ensuring the stability of the concrete pouring process.

[0018] Preferably, in S5, when the non-destructive tension screws and the tension screws in the joints between the plates are removed and sealed, after the concrete reaches the curing age, the cast steel nuts, keels and screws are removed, and the inner blade side is filled with polyurethane insulation material and waterproof mortar for sealing to prevent rainwater leakage and hot and cold bridge problems, the holes in the joints between the plates are filled with polyurethane insulation material and sealed with waterproof mortar, and a quality inspection is carried out.

[0019] In summary, the present invention mainly has the following beneficial effects:

[0020] The present invention designs a combined connection system of non-destructive tension embedded parts and plate seam through-screws. During the construction process, the non-destructive tension embedded threaded sleeves and matching screws form a tensioning structure. At the same time, the tension screws at the inter-plate joints and the outer reinforcing back ribs are reinforced and connected. By combining the non-destructive tension embedded parts system and the inter-plate joint tension screw system, non-destructive construction can be achieved during the installation of the assembled concrete shear wall and the pouring of the edge component concrete, ensuring that the outer blade surface is neat without expanding the mold during the construction of the assembled shear wall. Compared with the previous technology, this patent can avoid a large number of openings in the sandwich insulation exterior wall panel by coordinating the non-destructive tension system of the inner blade of the precast concrete sandwich insulation shear wall and the inter-plate joint tension screw system, maintain the functional continuity of the outer blade wall panel, reduce the rainwater leakage and cold and hot bridge problems caused by the sealing quality of the through-screws in the assembled exterior wall, and improve the construction quality and efficiency of the assembled shear wall.

[0021] The use of the present invention is conducive to realizing the integration of structure, insulation and decoration of assembled shear walls: since the outer blade does not need to be designed with through holes, the outer surface can be directly manufactured in the prefabricated component factory, and the wall panels can be directly installed and adjusted at the construction site, thereby realizing the integration of structure, insulation and decoration, and reducing on-site operations. The present invention does not affect the stability of the main structure: the present invention only optimizes the design of the reserved tension screw holes, and does not change the original anchor system of the precast concrete sandwich insulation shear wall, so it has no negative impact on the stability of the main structure. The present invention can significantly improve the performance: the feature of the present invention is to avoid through holes in the outer wall, cut off the transfer path of moisture and heat from the source, and improve the integrity, safety, fire resistance, durability and decorative effect of the assembled shear wall. The reinforcement effect of the present invention is better than that of a single non-destructive embedded part design: the present invention adopts the inner blade non-destructive tension system and the inter-plate joint tension screw system to ensure sufficient lateral constraints during concrete pouring and vibration, and has stronger reinforcement ability than a single non-destructive embedded design. The present invention can realize the recycling and reuse of the existing through-thread screws: on the basis of the existing lossless tensioning structure, not only can 50% of the lossless tensioning embedded parts be reduced, but also the through-thread screws can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional view of the efficient installation of lossless tension connection structure of precast concrete sandwich insulation shear wall;

[0023] Figure 2 This is the front view of the efficient installation of lossless tension connection structure of precast concrete sandwich insulation shear wall;

[0024] Figure 3 It is a top view of the efficient installation of lossless tension connection structure of precast concrete sandwich insulation shear wall;

[0025] Figure 4 It is a cross-sectional view of the inner blade non-destructive tension member structure.

[0026] Figure numerals: 100, outer blade of precast concrete sandwich insulation shear wall; 200, insulation layer; 300, inner blade of precast concrete sandwich insulation shear wall; 400, non-destructive tension member of inner blade; 500, cast steel nut; 600, keel; 700, aluminum mold; 800, tension screw; 900, reinforcement back rib; 401, threaded sleeve; 402, plastic sleeve; 403, screw; 401, threaded sleeve; 404, cast steel nut. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] refer to Figures 1 to 4 A precast concrete sandwich insulation shear wall tension connection structure, comprising a precast concrete sandwich insulation shear wall outer blade 100, an insulation layer 200, a precast concrete sandwich insulation shear wall inner blade 300, an inner blade non-destructive tension member 400, a cast steel nut 500, a keel 600, an aluminum mold 700, a tension screw 800, and a reinforcement back rib 900. The inner blades 300 of the shear wall are arranged in sequence, and a pre-buried threaded sleeve 401 is arranged in the inner blade 300 of the precast concrete sandwich insulation shear wall, and a threaded screw 403 is arranged in the threaded sleeve 401. The threaded sleeve 401 and the threaded screw 403 constitute a plastic sleeve 402, and the plastic sleeve 402 is fixed to the keel 600 through a cast steel nut 500 to form a plate joint tension screw connection structure, and the aluminum mold 700 is located outside the threaded sleeve 401.

[0029] This embodiment also discloses a construction method of a precast concrete sandwich insulation shear wall tension connection structure, comprising the following steps:

[0030] S1. Prefabricated shear walls in factories;

[0031] S2. On-site installation and fixation of non-destructive tension structure;

[0032] S3. Installation and fixation of the tension structure between the panels;

[0033] S4, pouring concrete in the post-casting area of ​​edge components;

[0034] S5. Remove the intact tension screws and the tension screws in the joints between plates and seal them.

[0035] Among them, in S1, when the prefabricated shear wall is prefabricated in the factory, the precast concrete sandwich insulation shear wall outer blade 100 including the exterior finish, the insulation layer 200, and the precast concrete sandwich insulation shear wall inner blade 300 are prefabricated in the factory according to the design, and the threaded sleeve 401 is embedded in the precast concrete sandwich insulation shear wall outer blade 100 during the component prefabrication process.

[0036] Among them, in S2, when the non-destructive tensioning structure is installed and fixed on site, the plastic sleeve 402 is first installed, and then the screw 403 is screwed into the threaded sleeve 401, and fixed to the keel 600 through the cast steel nut 404, completing the installation and fixation of all non-destructive tensioning parts.

[0037] Among them, in S3, when the tension structure of the joints between the plates is installed and fixed, the tension screw 800 is extended from the reserved hole of the aluminum mold 700, passed through the joints between the assembled shear wall panels, and the plastic sleeve is installed and fixed to the outer reinforcing back rib 900 and the inner keel 600 through nuts to form the tension screw connection structure of the joints between the plates.

[0038] Among them, in S4, when pouring concrete in the post-casting area of ​​the edge member, after completing the on-site installation of all non-destructive tension members, concrete is poured in the post-casting area 10000 of the edge member, using the lateral restraint provided by the non-destructive tension connection and ensuring the stability of the concrete pouring process.

[0039] Among them, in S5, when the non-destructive tension screws and the tension screws between the plates are removed and sealed, after the concrete reaches the curing age, the cast steel nuts 404, keels 600 and screws 403 are removed, and the inner blade side is filled with polyurethane insulation materials and waterproof mortar for sealing to prevent rainwater leakage and cold and hot bridge problems. The holes in the joints between the plates are filled with polyurethane insulation materials and sealed with waterproof mortar, and a quality inspection is carried out.

[0040] Among them, the present invention designs a non-destructive tensioning embedded part and a plate seam through-screw combined connection system. During the construction process, the non-destructive tensioning embedded threaded sleeve 401 and the matching screw 403 form a tensioning structure, and at the same time, the tensioning screw 800 at the inter-plate joint and the outer reinforcing back rib 900 are reinforced and connected. By combining the non-destructive tensioning embedded part system and the inter-plate joint tensioning screw system, non-destructive construction can be achieved during the installation of the assembled concrete shear wall and the concrete pouring of the edge components, ensuring that the outer blade surface is neat without expanding the mold during the construction of the assembled shear wall. Compared with the previous technology, this patent can avoid a large number of openings in the sandwich insulation exterior wall panel by coordinating the non-destructive tensioning system of the inner blade 300 of the precast concrete sandwich insulation shear wall and the inter-plate joint tensioning screw system, maintain the functional continuity of the outer blade wall panel, reduce the rainwater leakage and cold and hot bridge problems caused by the plugging quality of the through-screw in the assembled exterior wall, and improve the construction quality and construction efficiency of the assembled shear wall. Among them, the use of the present invention is conducive to realizing the integration of structure, insulation and decoration of assembled shear walls: since the outer blade does not need to be designed with through holes, the outer surface can be directly made in the prefabricated component factory, and the wall panels can be directly installed and adjusted at the construction site, thereby realizing the integration of structure, insulation and decoration, and reducing on-site operations. The present invention does not affect the stability of the main structure: the present invention only optimizes the design of the reserved tension screw holes, and does not change the original tie system of the precast concrete sandwich insulation shear wall, so it has no negative impact on the stability of the main structure. The present invention can significantly improve the performance: the feature of the present invention is to avoid through holes in the outer wall, cut off the transfer path of moisture and heat from the source, and improve the integrity, safety, fire resistance, durability and decorative effect of the assembled shear wall. The reinforcement effect of the present invention is better than that of a single non-destructive embedded part design: the present invention adopts the inner blade non-destructive tension system and the inter-plate joint tension screw system to ensure sufficient lateral constraints during concrete pouring and vibration, and has stronger reinforcement ability than a single non-destructive embedded design. The present invention can realize the recycling and reuse of the existing through-thread screws: on the basis of the existing lossless tensioning structure, not only can 50% of the lossless tensioning embedded parts be reduced, but also the through-thread screws can be reused.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A prefabricated concrete sandwich insulation shear wall tension connection structure, characterized in that: The invention comprises a precast concrete sandwich insulation shear wall outer blade (100), an insulation layer (200), a precast concrete sandwich insulation shear wall inner blade (300), an inner blade non-destructive tension member (400), a cast steel nut (500), a keel (600), an aluminum mold (700), a tension screw (800), and a reinforcing back rib (900). The precast concrete sandwich insulation shear wall outer blade (100), the insulation layer (200), and the precast concrete sandwich insulation shear wall inner blade (300) are arranged in sequence. A pre-buried threaded sleeve (401) is arranged in the inner blade plate (300) of the precast concrete sandwich insulation shear wall, a threaded screw (403) is arranged in the threaded sleeve (401), the threaded sleeve (401) and the threaded screw (403) form a plastic sleeve (402), the plastic sleeve (402) is fixed to the keel (600) through a cast steel nut (500) to form an inter-plate joint tension screw connection structure, and the aluminum mold (700) is located outside the threaded sleeve (401).

2. A construction method for a prefabricated concrete sandwich insulation shear wall tension connection structure, characterized in that: The following steps are involved: S1. Prefabricated shear walls in factories; S2. On-site installation and fixation of non-destructive tension structure; S3. Installation and fixation of the tension structure between the panels; S4, pouring concrete in the post-casting area of ​​edge components; S5. Remove the intact tension screws and the tension screws in the joints between plates and seal them.

3. The construction method of a precast concrete sandwich insulation shear wall tension connection structure according to claim 2, characterized in that: In S1, when the assembled shear wall is prefabricated in a factory, the precast concrete sandwich insulation shear wall outer blade (100) including the exterior facing, the insulation layer (200), and the precast concrete sandwich insulation shear wall inner blade (300) are prefabricated in the factory according to the design, and the threaded sleeve (401) is embedded in the precast concrete sandwich insulation shear wall outer blade (100) during the component prefabrication process.

4. The construction method of a precast concrete sandwich insulation shear wall tension connection structure according to claim 2, characterized in that: In S2, when the non-destructive tension structure is installed and fixed on site, the plastic sleeve (402) is first installed, and then the screw (403) is screwed into the threaded sleeve (401) and fixed to the keel (600) through the cast steel nut (404), completing the installation and fixation of all non-destructive tension parts.

5. The construction method of a precast concrete sandwich insulation shear wall tension connection structure according to claim 2, characterized in that: In S3, when the inter-plate joint tension structure is installed and fixed, the tension screw (800) is extended from the reserved hole of the aluminum mold (700), passed through the joint between the assembled shear wall panels, and the plastic sleeve is installed and fixed to the outer reinforcing back rib (900) and the inner keel (600) by nuts to form the inter-plate joint tension screw connection structure.

6. The construction method of a precast concrete sandwich insulation shear wall tension connection structure according to claim 2, characterized in that: In S4, when pouring concrete in the post-casting area of ​​the edge member, after completing the on-site installation of all non-destructive tension members, concrete is poured in the post-casting area (10000) of the edge member, utilizing the lateral constraints provided by the non-destructive tension connection and ensuring the stability of the concrete pouring process.

7. The construction method of a precast concrete sandwich insulation shear wall tension connection structure according to claim 1, characterized in that: In S5, when the non-destructive tension screws and the tension screws in the joints between the plates are removed and sealed, after the concrete reaches the curing age, the cast steel nuts (404), the keels (600) and the screws (403) are removed, and the inner blade side is filled with polyurethane insulation material and waterproof mortar for sealing to prevent rainwater leakage and hot and cold bridge problems. The holes in the joints between the plates are filled with polyurethane insulation material and sealed with waterproof mortar, and a quality inspection is performed.

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