Fabricated shear wall seamless connection structure

Abstract

The utility model discloses an assembly type shear wall seamless connection structure which comprises a first prefabricated shear wall and a second prefabricated shear wall. A butt joint protrusion is arranged at the bottom of the first prefabricated shear wall, and a butt joint groove allowing the butt joint protrusion to be embedded therein is formed in the top of the second prefabricated shear wall. A plurality of lower grouting channels are formed in the bottom surface of the butt joint groove, a plurality of upper grouting channels corresponding to the lower grouting channels one to one are formed in the bottom surface of the butt joint protrusion, and openings in the tail ends of the upper grouting channels and openings in the tops of the lower grouting channels coincide with each other after the first prefabricated shear wall and the second prefabricated shear wall are assembled. The top of the upper grouting channel penetrates out of the side wall of the first prefabricated shear wall to form a grouting opening. The upper grouting channel and the lower grouting channel are filled with grouting materials. The utility model has the beneficial effects that the technical scheme has the characteristics of high construction efficiency, excellent anti-seismic performance, reliable waterproof sealing and the like, is suitable for severe scenes such as high-rise buildings and earthquake-prone areas, and has economic and social benefits.

Description

A prefabricated seamless connection structure for shear walls Technical Field

[0001] This utility model relates to a prefabricated shear wall technology solution, and more particularly to a seamless connection structure for prefabricated shear walls. Background Technology

[0002] In recent years, with the rapid development of industrialized construction, prefabricated buildings have been widely used in residential and public buildings due to their advantages such as high construction efficiency, controllable quality, and low environmental pollution. As a core lateral force resisting component in building structures, the connection performance of prefabricated shear walls directly affects the overall stability, seismic resistance, and service life of the building. However, existing prefabricated shear wall connection technologies still have the following prominent problems: Insufficient joint sealing: Traditional shear walls mostly use simple tongue-and-groove butt joints or bolt connections, and the joints are prone to small gaps due to installation errors or material shrinkage. These gaps not only affect the building's appearance but also lead to problems such as water seepage and poor airtightness. Especially in humid or rainy areas, this may cause durability risks such as concrete corrosion and steel reinforcement rust; Limited seismic energy dissipation capacity: Under earthquake or wind loads, existing connection structures (such as grouted sleeve connections) mainly rely on rigid force transmission and lack effective energy dissipation mechanisms. Joints are prone to cracking due to stress concentration, leading to a decrease in the overall structural integrity and even causing localized damage. Construction is complex and unreliable: some technologies achieve connections through multi-step grouting or welding, but problems such as grout shrinkage and incomplete grouting are common. For example, the shear wall connection disclosed in patent application CN202321439633.3, which uses rebar insertion and overall grouting, simplifies the assembly process, but internal micro-cracks may still form after the grout layer shrinks, and the lack of dynamic sealing design results in significant performance degradation after long-term use. Durability and maintenance costs are high: existing sealing materials (such as ordinary rubber strips) are easily affected by environmental factors such as ultraviolet radiation and temperature differences, leading to aging and failure, requiring frequent maintenance. Furthermore, traditional connection structures require stringent construction precision; installation deviations may cause joint misalignment, further exacerbating the risk of seal failure.

[0003] To address the aforementioned issues, the industry urgently needs a prefabricated shear wall connection solution that combines seamless connection, high seismic performance, convenient construction, and long-term durability. Based on this background, this application proposes an innovative seamless connection structure. Through a comprehensive design including stepped interlocking, multiple grouting channels, elastic compression sealing, and weather-resistant protection, it effectively overcomes the shortcomings of existing technologies and provides technical support for the high-quality development of prefabricated buildings. Summary of the Invention

[0004] The main technical problem solved by this utility model is to provide a seamless connection structure for prefabricated shear walls, thereby solving one or more of the above-mentioned problems in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: a seamless connection structure for prefabricated shear walls, the innovation of which is: including a first prefabricated shear wall and a second prefabricated shear wall; the bottom of the first prefabricated shear wall is provided with a butt joint protrusion, and the top of the second prefabricated shear wall is provided with a butt joint groove into which the butt joint protrusion can be embedded;

[0006] The bottom surface of the docking groove is provided with several lower grouting channels, and the bottom surface of the docking protrusion is provided with several upper grouting channels that correspond one-to-one with the lower grouting channels. The end opening of the upper grouting channel and the top opening of the lower grouting channel overlap each other after the first precast shear wall and the second precast shear wall are assembled. The top of the upper grouting channel extends out from the side wall of the first precast shear wall to form a grouting port.

[0007] The upper and lower grouting channels are filled with grouting material.

[0008] In some implementations, the top of the upper grouting channel is inclined, and the grouting port is located at the highest point of the upper grouting channel.

[0009] In some embodiments, a recessed filling groove is provided on the side wall of the first precast shear wall at the edge of the grouting port. The filling groove contains a filling block, which is used to cover the grouting port after grouting is completed in the upward and downward grouting channels from the grouting port.

[0010] In some embodiments, an elastic rubber strip is pre-embedded at the bottom of the mating groove. The elastic rubber strip is compressed during assembly to fill the interlocking gap and achieve physical seamlessness.

[0011] In some embodiments, the mating protrusion and the mating groove have a stepped sawtooth interlocking structure, and each stepped surface is provided with a micro-sloping surface with an inclination angle of 3°-5°.

[0012] In some embodiments, the outer side of the elastic rubber strip is coated with polyurethane waterproof sealant, and the outer surface of the joint is covered with a silicone weather-resistant adhesive layer.

[0013] In some embodiments, the grout is a non-shrink epoxy resin.

[0014] The beneficial effects of this utility model are: this technical solution has the characteristics of high construction efficiency, excellent seismic performance, and reliable waterproof sealing, and is suitable for harsh scenarios such as high-rise buildings and earthquake-prone areas, with significant economic and social benefits. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0016] Figure 1 is a structural schematic diagram of a prefabricated shear wall seamless connection structure according to this utility model.

[0017] Figure 2 is a cross-sectional view of Figure 1.

[0018] Note: In Figures 1 and 2, the grouting material and filler block are shown to indicate the grouting port and grouting channel. Detailed Implementation

[0019] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] 1. Overall structural composition and connection method

[0021] As shown in Figures 1 and 2, this embodiment provides a seamless connection structure for prefabricated shear walls, including a first prefabricated shear wall 100 and a second prefabricated shear wall 200. The bottom of the first prefabricated shear wall 100 is provided with a mating protrusion, and the top of the second prefabricated shear wall 200 is provided with a mating groove that matches the mating protrusion. The two are seamlessly connected through the following design:

[0022] Stepped serrated interlocking structure:

[0023] The mating protrusions and mating grooves adopt a stepped sawtooth interlocking design, with each step being 30mm high and 20mm deep. The step surface has a slight bevel with an inclination angle of 3°-5°.

[0024] Its working principle is: stepped interlocking increases the contact area and disperses shear force; the micro-sloping surface guides natural fit during assembly and reduces installation errors.

[0025] Its advantages include: reducing construction difficulty, avoiding local stress concentration, and enhancing shear resistance and structural integrity.

[0026] 2. Grouting channel and sealing design

[0027] As shown in Figure 2, the upper grouting channel 302 and the lower grouting channel 301 are:

[0028] The bottom surface of the mating protrusion is provided with multiple upper grouting channels 302, and the bottom surface of the mating groove is provided with corresponding lower grouting channels 301; after assembly, the openings of the upper and lower grouting channels 301 overlap to form a continuous channel.

[0029] The top of the grouting channel 302 is inclined, and the grouting port 303 is located at the highest point of the channel.

[0030] Its working principle is: the inclined design uses gravity to guide the flow of grout, ensuring that the grout fills the channel; the highest grouting port 303 avoids air bubbles and improves density.

[0031] Its advantages are: improved grouting efficiency and reduced cavities and defects.

[0032] Grouting material and filler blocks:

[0033] The grouting material uses non-shrink epoxy resin with added micro-expansion agents (such as aluminum powder), and there are no shrinkage cracks after curing.

[0034] The grouting port 303 on the side wall of the first precast shear wall 100 is provided with a filling groove 400, and a lightweight polymer filling block is embedded in the groove. After grouting is completed, the grouting port 303 is covered.

[0035] Its working principle is as follows: epoxy resin grout is injected through grouting port 303, filling the upper and lower channels and curing; the filling block seals the grouting port 303 to prevent external erosion.

[0036] Its advantages are: the grouting layer is dense and seamless, the filling block is aesthetically pleasing and protects the grouting port 303.

[0037] 3. Multiple sealing and durability design

[0038] As shown in Figure 2, the elastic rubber strip 500 and the sealant layer:

[0039] An EPDM rubber strip (Shore hardness 60-70) is pre-embedded at the bottom of the mating groove. During assembly, the compression amount is ≥5mm to fill the interlocking gap.

[0040] The outer side of the rubber strip is coated with polyurethane waterproof sealant, and the outer surface of the joint is covered with a silicone weather-resistant adhesive layer.

[0041] Its working principle is as follows: the rubber strip provides an initial seal after compression; polyurethane glue fills the micropores; and silicone glue resists ultraviolet rays and temperature difference deformation.

[0042] Its advantages are: triple sealing ensures long-term waterproofing and airtightness, extending the service life of the structure.

[0043] 4. Assembly process and structural advantages

[0044] Assembly steps:

[0045] The second precast shear wall 200 is hoisted, and the docking protrusion is embedded into the docking groove. The stepped interlocking and the micro-sloping surface are used for automatic alignment.

[0046] Inject non-shrink epoxy resin grout through grouting port 303 until the grout overflows from filling groove 400.

[0047] Install the filler block to seal the grouting port 303, and apply polyurethane sealant and silicone weather-resistant sealant.

[0048] The structural advantages of this technical solution are:

[0049] Seamless connection: The stepped interlocking, elastic rubber strip 500, grout and sealant work together to eliminate physical gaps and visual seams.

[0050] High durability: EPDM rubber is resistant to aging, epoxy grouting material has no shrinkage, and silicone sealant has strong weather resistance and can adapt to extreme environments.

[0051] Convenient construction: Standardized components are prefabricated in the factory, and only alignment, grouting and sealing are required on site, which shortens the construction period by 30%.

[0052] Seismic performance: The stepped interlocking structure disperses seismic forces, while the elastic rubber and grouting layer buffer energy, enhancing the overall seismic resistance of the structure.

[0053] This prefabricated shear wall seamless connection structure achieves efficient and reliable seamless connection through the following core designs: stepped interlocking: enhances shear resistance and reduces installation errors; multi-channel grouting: ensures tight joints and improves overall integrity; multiple sealing: elastic rubber, sealant, and weather-resistant adhesive work together for protection; material optimization: non-shrink epoxy resin and aging-resistant rubber extend service life.

[0054] This structure features high construction efficiency, excellent seismic performance, and reliable waterproofing and sealing, making it suitable for harsh environments such as high-rise buildings and earthquake-prone areas, and yielding significant economic and social benefits.

[0055] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A seamless connection structure for prefabricated shear walls, characterized in that: The system includes a first precast shear wall (100) and a second precast shear wall (200). The first precast shear wall (100) has a butt joint protrusion at its bottom, and the second precast shear wall (200) has a butt joint groove at its top for the butt joint protrusion to be inserted into. The bottom surface of the butt joint groove has a plurality of lower grouting channels (301), and the bottom surface of the butt joint protrusion has a plurality of upper grouting channels (302) that correspond one-to-one with the lower grouting channels (301). The end opening of the upper grouting channel (302) and the top opening of the lower grouting channel (301) overlap each other after the first precast shear wall (100) and the second precast shear wall (200) are assembled. The top of the upper grouting channel (302) extends out from the side wall of the first precast shear wall (100) to form a grouting port (303). The upper grouting channel (302) and the lower grouting channel (301) are filled with grouting material.

2. The prefabricated shear wall seamless connection structure according to claim 1, characterized in that: The top of the upper grouting channel (302) is inclined, and the grouting port (303) is located at the highest point of the upper grouting channel (302).

3. The prefabricated shear wall seamless connection structure according to claim 2, characterized in that: The first precast shear wall (100) has a recessed filling groove (400) on its side wall at the edge of the grouting port (303). The filling groove (400) is provided with a filling block, which is used to cover the grouting port (303) after grouting is completed in the upward grouting channel (302) and the downward grouting channel (301) from the grouting port (303).

4. The prefabricated shear wall seamless connection structure according to claim 1, characterized in that: An elastic rubber strip (500) is pre-embedded at the bottom of the mating groove. The elastic rubber strip (500) is compressed during assembly to fill the interlocking gap and achieve physical seamlessness.

5. The prefabricated shear wall seamless connection structure according to claim 1, characterized in that: The mating protrusion and mating groove have a stepped sawtooth interlocking structure, and each stepped surface is provided with a micro-sloping surface with an inclination angle of 3°-5°.

6. The prefabricated shear wall seamless connection structure according to claim 4, characterized in that: The outer side of the elastic rubber strip (500) is coated with polyurethane waterproof sealant, and the outer surface of the joint is covered with a silicone weather-resistant adhesive layer.

7. The prefabricated shear wall seamless connection structure according to claim 1, characterized in that: The grouting material is non-shrink epoxy resin.

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