Pre-embedded split bolt prefabricated part structure in wall and construction method of pre-embedded split bolt prefabricated part structure

Abstract

The invention discloses a pre-embedded split bolt prefabricated part structure in a wall. The pre-embedded split bolt prefabricated part structure comprises an embedded pull rod and a fixing assembly. Embedded ends are arranged at the two ends of the embedded pull rod, glass fiber reinforced plastic connecting threaded sleeves are arranged in the middles of the interiors of the embedded ends, and the interiors of the embedded pull rod, the embedded ends, the water stop ring and the expansion water stop ring are doped with glass fiber reinforced plastic fibers; the fixing assembly is of a U-shaped structure made of metal materials, double rows of reinforcing steel pipes are arranged at the upper end and the lower end of the U-shaped structure of the fixing assembly, and a connecting plate is arranged in the middle of the interior of the fixing assembly and located between the two double rows of reinforcing steel pipes. Limiting pins are arranged between the upper end and the lower end of the fixing assembly and on the outer sides of the two double-row reinforcing steel pipes in a penetrating mode, the phenomena that concrete on the periphery of a hole is loose, and an outer vertical face is subjected to anti-alkali flow marks are reduced, the construction efficiency is improved, the compactness is controllable, the durability is improved, and the requirements of green buildings for waterproof durability and construction standardization are met.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering, and in particular to a prefabricated structure of pre-buried tension bolts in a wall and a construction method thereof. Background Art

[0002] With the acceleration of my country's urbanization process, the construction industry has ushered in unprecedented development opportunities, but it is also facing new requirements such as low carbon, energy saving, and environmental protection. The traditional external wall bolt hole plugging process adopts the method of filling mortar or foaming agent on site, which has problems such as large material shrinkage and poor adhesion to the substrate. It is difficult to resist the penetration of groundwater pressure, resulting in frequent leakage and dampness. Especially in shear walls, basement exterior walls and other parts, after conventional plugging, the concrete around the holes is often loose, and the facades are often alkali-backed. The long-term rust of the metal water stop screw is easy to cause rust pollution on the wall. Although the existing technology attempts to use expansion water stop strips or grouting repairs, there are defects such as low construction efficiency, uncontrollable density, and insufficient durability, which makes it difficult to meet the requirements of green buildings for waterproof durability and construction standardization. To this end, this project proposes a new solution for sealing exterior wall bolt holes based on prefabricated parts technology. Through factory-prefabricated high-density composite plugs, integrated water-stop structures and tension screw reinforcement functions, it can effectively solve the pain points of performance defects of traditional process materials and unstable on-site construction quality, and provide innovative solutions for building waterproofing systems. It aims to improve construction quality and efficiency through technological innovation and promote the sustainable development of the construction industry. Summary of the invention

[0003] The object of the present invention is to provide a prefabricated structure of pre-embedded tension bolts in a wall and a construction method thereof, so as to solve the problems proposed in the above-mentioned background technology that the traditional external wall bolt hole sealing process adopts the method of on-site filling of mortar or foaming agent, which has the problems of large material shrinkage and poor adhesion with the substrate, and is difficult to resist the penetration of groundwater pressure, resulting in frequent leakage and moisture regurgitation, especially in shear walls, basement exterior walls and other parts. After conventional sealing, the concrete around the holes is often loose, and there are alkali flow marks on the facades. In addition, the long-term rusting of the metal waterstop screws can easily cause rust pollution on the wall. Although the prior art attempts to use expansion waterstop strips or grouting repairs, there are defects such as low construction efficiency, uncontrollable density, and insufficient durability, which makes it difficult to meet the requirements of green buildings for waterproof durability and construction standardization.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a prefabricated structure of pre-buried tension bolts in a wall, comprising an embedded tension rod and a fixing assembly;

[0005] Both ends of the embedded stay bar are provided with embedded ends. A water stop ring is arranged on the outer surface of the embedded stay bar and between the two embedded ends. An expansion water stop ring is arranged on one side of the outer surface of the embedded stay bar and between the water stop rings. A fiberglass connection threaded sleeve is arranged at the middle position inside the embedded end. The embedded stay bar, the embedded end, the water stop ring and the expansion water stop ring are integrally formed by casting with concrete material, and fiberglass fibers are doped inside the embedded stay bar, the embedded end, the water stop ring and the expansion water stop ring;

[0006] The fixing component is a metal C-shaped structure. Double-row reinforcement steel pipes are arranged at the upper and lower ends between the C-shaped structures of the fixing component. A connecting plate is arranged at the middle position inside the fixing component and between the two double-row reinforcement steel pipes. A connecting screw is arranged on one side of the connecting plate close to the embedded stay bar. The connecting screw is connected to the fiberglass connection threaded sleeve by threads. A limit pin is arranged through the outside of the two double-row reinforcement steel pipes between the upper and lower ends of the fixing component. The two limit pins penetrate through the connecting plate.

[0007] Preferably, strengthening connection seats are arranged at the upper and lower ends inside the fixing component at positions corresponding to the limit pins. The limit pins penetrate through the strengthening connection seats. Guide wedges are arranged on the outer surface of the strengthening connection seats and at positions corresponding to the limit pins on the outer surface of the connecting plate. Grooves are arranged on the side walls of the fixing component at positions corresponding to the double-row reinforcement steel pipes.

[0008] Preferably, the outer diameters of the embedded end, the water stop ring and the expansion water stop ring are the same, and the outer diameter of the embedded stay bar is smaller than the outer diameters of the embedded end, the water stop ring and the expansion water stop ring.

[0009] Preferably, the fixing component is a C-shaped structure formed by shearing and bending metal plates. A slot for the connecting plate to penetrate through is arranged at the middle position of the inner side wall of the fixing component.

[0010] Preferably, it includes the following steps:

[0011] Step 1: Component selection and pre-assembly. Select the embedded stay bar with a corresponding size according to the designed thickness of the wall, and complete the threaded fastening assembly of the connecting plate with the fiberglass connection threaded sleeve through the connecting screw;

[0012] Step 2: Positioning and installation. Install the above structure into the wall steel bar framework that has passed the acceptance;

[0013] Step 3: Formwork system installation. Install the formwork in the order of "inner formwork → screw penetration → outer formwork", and ensure that the expansion water stop ring faces the water-facing side;

[0014] Step 4: Strengthen the formwork system. Use the fixing components to cooperate with the limit pins to lock the double-row reinforcement steel pipes outside the formwork.

[0015] Step 5: Acceptance of concealed works. Check the perpendicularity of the connecting screw rods, the layout direction of the expansion water-stop ring on the water-facing side, the joint accuracy between the opening position of the formwork and the close-fitting degree of the formwork:

[0016] Step 6: Concrete pouring. Implement layered pouring and synchronously monitor the formwork displacement;

[0017] Step 7: Demould in stages:

[0018] Initial demoulding: First, remove the double-row reinforcement steel pipes outside the formwork on the fixing components by knocking the limit pins;

[0019] Screw rod recovery: By clamping the connecting plate, screw out the connecting screw rod counterclockwise;

[0020] Formwork removal: After reaching the demoulding strength, remove the formwork as a whole;

[0021] Step 8: Plug and cure. Use micro-expansion cement mortar to fill the glass fiber reinforced plastic connecting screw-thread sleeves in layers.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: It replaces the traditional external wall bolt hole plugging process using on-site filled mortar or foaming agent, etc., avoids problems such as large shrinkage of materials and poor bonding with the matrix, effectively resists groundwater pressure penetration, replaces the conventional plugging method, reduces phenomena such as concrete loosening around the holes and alkali leakage marks on the outer facade, replaces metal water-stop screw rods, avoids wall rust pollution caused by long-term corrosion, the methods of using expansion water-stop strips or grouting repair in the prior art cannot meet the construction requirements, improves construction efficiency, the compactness is controllable, improves durability, and meets the requirements of green buildings for waterproof durability and construction standardization. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an isometric view of the main structure of the present invention;

[0024] Figure 2 It is an axonometric exploded view of the main structure of the present invention;

[0025] Figure 3 It is a front view schematic diagram of the main structure of the present invention;

[0026] Figure 4 It is a front view cross-sectional view of the main structure of the present invention;

[0027] Figure 5 It is a schematic diagram of the construction steps of the present invention.

[0028] In the figure: 1 - Embedded stay rod, 2 - Fixed component, 3 - Embedded end, 4 - Water stop ring, 5 - Expanding water stop ring, 6 - Fiberglass connecting threaded sleeve, 7 - Fiberglass fiber, 8 - Double-row reinforcement steel pipes, 9 - Connecting plate, 10 - Connecting screw, 11 - Limit pin, 12 - Reinforced connecting seat, 13 - Guide wedge, 14 - Groove, 15 - Grooving. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figures 1-5 , the present invention provides a precast structure of an embedded tie bolt in a wall, including an embedded stay rod 1 and a fixed component 2;

[0031] Both ends of the embedded stay rod 1 are provided with embedded ends 3. A water stop ring 4 is provided on the outer surface of the embedded stay rod 1 and between the two embedded ends 3. An expanding water stop ring 5 is provided on one side of the outer surface of the embedded stay rod 1 and between the water stop rings 4. A fiberglass connecting threaded sleeve 6 is provided at the middle position inside the embedded end 3. The embedded stay rod 1, the embedded end 3, the water stop ring 4 and the expanding water stop ring 5 are integrally formed by casting with concrete material. Fiberglass fiber 7 is doped inside the embedded stay rod 1, the embedded end 3, the water stop ring 4 and the expanding water stop ring 5;

[0032] The fixed component 2 is a metal C-shaped structure. Double-row reinforcement steel pipes 8 are provided at the upper and lower ends between the C-shaped structures of the fixed component 2. A connecting plate 9 is provided at the middle position inside the fixed component 2 and between the two double-row reinforcement steel pipes 8. A connecting screw 10 is provided on one side of the connecting plate 9 close to the embedded stay rod 1. The connecting screw 10 is connected to the fiberglass connecting threaded sleeve 6 by threads. Limit pins 11 are penetrated through the outside of the two double-row reinforcement steel pipes 8 between the upper and lower ends of the fixed component 2. The two limit pins 11 penetrate through the connecting plate 9.

[0033] During use, the concrete material is integrally formed by the casting process. The water stop ring 4 and the expansion water stop ring 5 are integrally cast on the outer surface of the embedded tie rod 1 to improve the water stop effect of the overall structure of the embedded tie rod 1. The two ends of the embedded tie rod 1 are cast into embedded ends 3, and the fiberglass connecting threaded sleeve 6 is embedded inside the embedded ends 3. When casting the embedded tie rod 1, the embedded ends 3, the water stop ring 4, and the expansion water stop ring 5, fiberglass fibers 7 are doped in the concrete to improve the overall structural strength so that the overall structural strength meets the tensile requirements;

[0034] Through the threaded connection between the connecting screw 10 and the fiberglass connecting threaded sleeve 6, the connecting plate 9 is connected to both ends of the embedded tie rod 1. The fixing component 2 is inserted and connected with the connecting plate 9, and the fixing component 2 is arranged at both ends of the embedded tie rod 1. The double-row reinforcement steel pipes 8 are arranged inside the fixing component 2 and are respectively arranged at the upper and lower ends of the connecting plate 9, and are fixedly arranged inside the fixing component 2 through the insertion connection of the limit pin 11 with the fixing component 2.

[0035] At the positions corresponding to the limit pin 11 at the upper and lower ends inside the fixing component 2, there are strengthening connection seats 12. The limit pin 11 penetrates through the strengthening connection seats 12. At the positions corresponding to the limit pin 11 on the outer surface of the strengthening connection seats 12 and the outer surface of the connecting plate 9, there are guide wedges 13. At the positions corresponding to the double-row reinforcement steel pipes 8 on the side wall of the fixing component 2, there are grooves 14. Strengthening connection seats 12 are arranged at the upper and lower ends of the fixing component 2 to improve the connection strength between the limit pin 11 and the fixing component 2. Guide wedges 13 are arranged on the outer surface of the strengthening connection seats 12 to facilitate the insertion connection of the limit pin 11 with the fixing component 2. Grooves 14 are arranged on the side wall of the fixing component 2 to limit the double-row reinforcement steel pipes 8.

[0036] The outer diameters of the embedded ends 3, the water stop ring 4, and the expansion water stop ring 5 are the same, and the outer diameter of the embedded tie rod 1 is smaller than the outer diameters of the embedded ends 3, the water stop ring 4, and the expansion water stop ring 5. The outer diameters of the embedded ends 3, the water stop ring 4, and the expansion water stop ring 5 are all larger than the outer diameter of the embedded tie rod 1 to ensure the water stop effect.

[0037] The fixing component 2 is a U-shaped structure formed by shearing and bending metal plates. An opening slot 15 for the connecting plate 9 to penetrate through is opened at the middle position of the inner side wall of the fixing component 2. The opening slot 15 is arranged at the rear side of the fixing component 2 so that the connecting plate 9 can be inserted and connected into the inside of the fixing component 2 through the opening slot 15.

[0038] It includes the following steps:

[0039] Step (1): Component selection and pre-assembly. Select the embedded tie rod 1 with a corresponding size according to the designed thickness of the wall. The size of the embedded tie rod 1 can be customized according to the size requirements of the construction site, and complete the threaded fastening assembly of the connecting plate 9 with the fiberglass connecting threaded sleeve 6 through the connecting screw 10.

[0040] Step (2): Positioning and installation. Install the above structure into the accepted wall steel bar framework.

[0041] Step (3): Formwork system installation. Install the formwork in the order of "inner formwork → screw penetration → outer formwork", ensure that the expansion water stop ring 5 faces the water-facing side, ensure that both ends of the embedded tie rod 1 are correspondingly arranged with the formwork, and the connecting plate 9 extends to the outside of the formwork.

[0042] Step (4): Formwork system reinforcement. Use the fixing component 2 to cooperate with the limit pin 11 to lock the double-row reinforcement steel pipes 8 outside the formwork, so as to reinforce the formwork system.

[0043] Step (5): Hidden works acceptance. Check the perpendicularity of the connecting screw 10, the layout direction of the expansion water stop ring 5 on the water-facing side, the joint accuracy of the opening position of the formwork and the close-fitting degree of the formwork.

[0044] Step (6): Concrete pouring. Implement layered pouring and synchronously monitor the formwork displacement.

[0045] Step (7): Demoulding in stages:

[0046] Initial demoulding: First, remove the limit pin 11 by knocking the limit pin 11, and remove the double-row reinforcement steel pipes 8 outside the formwork on the fixing component 2, so as to remove the fixing component 2 as a whole.

[0047] Screw recovery: By clamping the connecting plate 9, screw out the connecting screw 10 counterclockwise, and leave the overall structure of the embedded tie rod 1 in the concrete structure.

[0048] Formwork removal: Remove the formwork as a whole after reaching the demoulding strength.

[0049] Step (8): Plugging and curing. Use micro-expansion cement mortar to fill the fiberglass connecting threaded sleeve 6 in layers, and plug the threaded opening of the fiberglass connecting threaded sleeve 6.

[0050] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A prefabricated structure of pre-buried tension bolts in a wall, characterized by: It includes a buried tie rod (1) and a fixing component (2); Both ends of the buried tie rod (1) are provided with embedded ends (3). A water stop ring (4) is arranged on the outer surface of the buried tie rod (1) between the two embedded ends (3). An expansion water stop ring (5) is arranged on one side of the outer surface of the buried tie rod (1) between the water stop rings (4). A fiberglass connection threaded sleeve (6) is arranged at the middle position inside the embedded end (3). The buried tie rod (1), the embedded end (3), the water stop ring (4) and the expansion water stop ring (5) are integrally formed by casting with concrete material, and fiberglass fibers (7) are doped inside the buried tie rod (1), the embedded end (3), the water stop ring (4) and the expansion water stop ring (5); The fixing component (2) is a metal U-shaped structure. Double-row reinforcement steel pipes (8) are arranged at the upper and lower ends between the U-shaped structures of the fixing component (2). A connecting plate (9) is arranged at the middle position inside the fixing component (2) between the two double-row reinforcement steel pipes (8). A connecting screw (10) is arranged on one side of the connecting plate (9) close to the buried tie rod (1). The connecting screw (10) is connected to the fiberglass connection threaded sleeve (6) by threads. A limiting pin (11) is arranged through the outside of the two double-row reinforcement steel pipes (8) between the upper and lower ends of the fixing component (2). The two limiting pins (11) penetrate through the connecting plate (9).

2. The prefabricated structure of pre-buried tension bolts in a wall according to claim 1, characterized in that: Reinforcing connection seats (12) are arranged at the positions corresponding to the limiting pins (11) at the upper and lower ends inside the fixing component (2). The limiting pins (11) penetrate through the reinforcing connection seats (12). Guide wedges (13) are arranged at the positions corresponding to the limiting pins (11) on the outer surface of the reinforcing connection seats (12) and the outer surface of the connecting plate (9). Grooves (14) are arranged at the positions corresponding to the double-row reinforcement steel pipes (8) on the side wall of the fixing component (2).

3. The prefabricated structure of pre-buried tension bolts in a wall according to claim 1, characterized in that: The outer diameters of the embedded end (3), the water stop ring (4) and the expansion water stop ring (5) are the same, and the outer diameter of the buried tie rod (1) is smaller than the outer diameters of the embedded end (3), the water stop ring (4) and the expansion water stop ring (5).

4. The prefabricated structure of pre-buried tension bolts in a wall according to claim 1, characterized in that: The fixing component (2) is a U-shaped structure formed by shearing and bending metal plates. A slot (15) for the connecting plate (9) to penetrate through is arranged at the middle position of the inner side wall of the fixing component (2).

5. The method for constructing prefabricated pre-buried tension bolts in a wall according to claim 1, characterized in that: It includes the following steps: Step (1): Component selection and pre-assembly. Select the buried tie rod (1) with a corresponding size according to the designed thickness of the wall, and complete the threaded fastening assembly of the connecting plate (9) and the fiberglass connection threaded sleeve (6) through the connecting screw (10); Step (2): Positioning and installation. Install the above structure into the accepted wall steel bar framework; Step (3): Formwork system installation. Install the formwork in the order of "inner formwork → screw penetration → outer formwork", and ensure that the expansion water stop ring (5) faces the water-facing side; Step (4): reinforcing the formwork system, using the fixing assembly (2) in conjunction with the limiting pin (11) to lock the double-row reinforcement steel pipes (8) on the outer side of the formwork; Step (5): Concealed project acceptance, check the verticality of the connecting screw (10), the layout direction of the water-facing surface of the expansion water stop ring (5), the accuracy of the joint with the template opening position and the degree of close fit of the template: Step (6): pouring concrete in layers and simultaneously monitoring the displacement of the formwork; Step (7): Demolding in stages: Initial disassembly: firstly, the double-row reinforcement steel pipes (8) on the outer side of the upper template of the fixing assembly (2) are removed by knocking the limit pin (11); Screw recovery: by clamping the connecting plate (9), unscrewing the connecting screw (10) counterclockwise; Formwork removal: After reaching the demoulding strength, remove the formwork as a whole; Step (8): sealing and curing, using micro-expansive cement mortar to fill the fiberglass reinforced plastic connecting threaded sleeve (6) in layers.

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