Reinforced concrete full prefabricated bathroom bottom basin side plate and shear wall connecting structure

Abstract

The utility model relates to the technical field of fabricated building structure discloses a connecting structure of reinforced concrete full prefabricated bathroom bottom basin side plate and shear wall, including full prefabricated bathroom bottom basin side plate and shear wall, both are connected through reinforced connecting structure and water stop structure, reinforced connecting structure contains mutually connected embedded reinforcing steel and lap reinforcing steel, superimposed shear wall contains prefabricated layer and cast-in-place layer, and reinforcing steel lap or is connected through joint in cast-in-place layer, and also can be combined with steel plate welding, water stop structure contains horizontal sealing rubber strip, waterproof coating, and the bottom basin side plate is equipped with concave-convex structure and shear wall mechanical bite. The structure adapts to superimposed shear wall single side or double side connection scene, improves the mechanical reliability and waterproof tightness of connection, and the construction is convenient, and the application range is wide.

Description

Technical Field

[0001] This utility model belongs to the field of prefabricated building technology, specifically relating to a connection structure between a reinforced concrete prefabricated bathroom sink side panel and a shear wall. Background Technology

[0002] Prefabricated buildings have significant advantages such as being green and environmentally friendly, and having high construction efficiency, leading to their increasingly widespread application in the construction industry. As a core component of prefabricated interior decoration, the connection between the fully prefabricated bathroom sink and the shear wall is a crucial link in ensuring the structural integrity, waterproofing, and durability of the bathroom.

[0003] Traditional connection methods (such as grouting sleeve connection) have the following shortcomings: First, the alignment accuracy of the reinforcing bars is extremely high, making on-site construction difficult; second, waterproofing relies on a single structure, resulting in a high risk of leakage; and third, the process is cumbersome, and the construction efficiency is difficult to meet the "rapid assembly" requirements of prefabricated buildings.

[0004] Therefore, there is an urgent need for a fully prefabricated bathroom sink and shear wall connection structure that is reliable, waterproof, and easy to construct. Utility Model Content

[0005] This utility model aims to overcome the shortcomings of the existing technology and provide a connection structure between the prefabricated bathroom sink and the shear wall that is reliable, has excellent waterproof performance, and is easy to construct, so as to realize the coordinated force bearing and efficient assembly of the prefabricated bathroom sink and the shear wall.

[0006] This utility model proposes a connection structure between a precast reinforced concrete bathroom sink side panel and a shear wall, comprising a precast reinforced concrete bathroom sink side panel and a shear wall; the sink side panel and the shear wall are connected by a steel reinforcement connection structure and a waterproof structure; the steel reinforcement connection structure includes interconnected embedded steel bars and lapped steel bars, the waterproof structure includes a horizontal sealing strip and a waterproof coating, and the waterproof structure also includes a concave-convex structure provided on the sink side panel, which is used to assist in forming a mechanical interlock with the shear wall. The combination of steel reinforcement connection, waterproof structure, and concave-convex interlock improves the connection reliability and waterproof sealing performance.

[0007] Preferably, the shear wall is a precast shear wall, with a corrugated metal pipe embedded within it. The embedded reinforcing bars are inserted through the corrugated metal pipe, and grout is injected into the corrugated metal pipe. The corrugated metal pipe and the grout work together to ensure the connection strength of the embedded reinforcing bars and the density of the grout.

[0008] Preferably, a straight threaded joint is provided at the connection node between the precast shear wall and the base plate side panel. The straight threaded joint is used to connect the embedded reinforcing bars and the lapped reinforcing bars. The straight threaded joint connects the reinforcing bars, improving the connection accuracy and mechanical properties, and making construction convenient and efficient.

[0009] More preferably, the base plate is disposed on one side of the precast shear wall, and the one side of the precast shear wall is connected to the base plate via steel plate welding and rebar lap splicing in conjunction with the water-stop structure. The single-sided steel plate welding, rebar lap splicing, and water-stop structure achieve reliable connection and waterproofing on one side.

[0010] Preferably, the base plate side panels are disposed on both sides of the precast shear wall, and both sides of the precast shear wall are connected to the corresponding base plate side panels by welding steel plates and lapping reinforcing bars in conjunction with the water-stop structure. The combination of welded steel plates, lapped reinforcing bars, and the water-stop structure on both sides ensures balanced stress on both sides and reliable waterproofing.

[0011] Preferably, the shear wall is a composite shear wall, comprising a precast shear wall layer and a cast-in-place concrete layer. The embedded reinforcing bars are embedded in the precast shear wall layer, and the lapped reinforcing bars are lapped with the embedded reinforcing bars within the cast-in-place concrete layer. The lapped reinforcement within the cast-in-place layer of the composite shear wall simplifies construction and enhances the overall structural integrity.

[0012] More preferably, the base plate is disposed on one side of the composite shear wall, and the one side of the composite shear wall is connected to the water-stop structure and the base plate via the steel reinforcement connection. This one-sided connection of the composite shear wall balances construction efficiency with the reliability of the one-sided connection and waterproofing.

[0013] More preferably, the bottom basin side plates are disposed on both sides of the composite shear wall, and both sides of the composite shear wall are connected to the water-stop structure and the corresponding bottom basin side plates through the steel reinforcement connection structure. The double-sided connection of the composite shear wall ensures the stability of the double-sided connection and good overall stress resistance and waterproof performance.

[0014] Preferably, the concave-convex structure includes grooves and embossing distributed at intervals along the side surface of the base plate. The grooves are trapezoidal, rectangular, or dovetail-shaped, and the embossing includes a grid pattern or diagonal corrugations. The concave-convex structure (grooves and embossing) enhances mechanical interlocking and improves the shear resistance and waterproofing of the connection.

[0015] Preferably, the horizontal sealing strip is a water-swellable waterproof strip, and the waterproof coating is a polymer cement waterproof coating. The water-swellable waterproof strip and the polymer cement coating form a double waterproof layer, adapting to humid environments.

[0016] Compared with the prior art, the beneficial results of this utility model are as follows:

[0017] Through the synergistic effect of the steel reinforcement connection structure, the water-stop structure and the interlocking of the concave and convex mechanical joints, the mechanical reliability and shear resistance of the connection are improved, and the waterproof sealing is strengthened to prevent leakage. At the same time, it is suitable for single-sided / double-sided connection scenarios of precast shear walls and composite shear walls, with flexible construction methods (straight thread joints, steel plate welding, cast-in-place lap joints, etc.), reducing precision requirements, improving construction efficiency, and having a wider range of applications. Attached Figure Description

[0018] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and, together with the description, serve to explain the principles of the present invention. Other embodiments and many anticipated advantages of the embodiments will be readily recognized as they become better understood through reference to the following detailed description. Elements in the drawings are not necessarily to scale. The same reference numerals refer to corresponding similar parts.

[0019] Figure 1 A schematic diagram of the connection structure between the bottom basin side plate and the shear wall according to an embodiment of the present invention is shown;

[0020] Figure 2 A schematic diagram of a single-sided connection node of an EMC precast shear wall according to Embodiment 1 of the present invention is shown.

[0021] Figure 3 A schematic diagram of a single-sided connection node two of an EMC precast shear wall according to Embodiment 1 of this utility model is shown;

[0022] Figure 4 A schematic diagram of the double-sided connection node three of the EMC precast shear wall according to Embodiment 2 of this utility model is shown;

[0023] Figure 5 A schematic diagram of the four-sided connection node of the EMC precast shear wall according to Embodiment 2 of this utility model is shown;

[0024] Figure 6 A schematic diagram of a single-sided connection node of a fully prefabricated shear wall according to Embodiment 3 of the present invention is shown;

[0025] Figure 7 A schematic diagram of a single-sided connection node two of a fully prefabricated shear wall according to Embodiment 3 of this utility model is shown;

[0026] Figure 8 A schematic diagram of the double-sided connection node three of the fully prefabricated shear wall according to Embodiment 4 of this utility model is shown;

[0027] Figure 9 A schematic diagram of the four-sided connection node of the fully prefabricated shear wall according to Embodiment 4 of the present invention is shown;

[0028] Figure 10 A schematic diagram of a single-sided connection node of a composite shear wall according to Embodiment 5 of the present invention is shown;

[0029] Figure 11 A schematic diagram of the second double-sided connection node of the composite shear wall according to Embodiment 5 of the present invention is shown;

[0030] Figure 12 A schematic diagram of a single-sided connection node three of a composite shear wall according to Embodiment 6 of the present invention is shown;

[0031] Figure 13 A schematic diagram of the double-sided connection node four of the composite shear wall according to Embodiment 6 of the present invention is shown;

[0032] Figure 14 A schematic diagram of the specific structure of the concave-convex structure according to an embodiment of the present invention is shown.

[0033] The meanings of the numbers in the diagram are as follows: 1. Base plate; 2. Shear wall; 3. Embedded steel bars; 4. Lap steel bars; 5. Concave-convex structure; 6. Corrugated metal pipe; 7. Straight threaded joint. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0035] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] This utility model proposes a connection structure between the side panel of the precast reinforced concrete bathroom sink and the shear wall, such as... Figure 1 and Figure 2 As shown, the connection structure includes a precast reinforced concrete bathroom sink side panel 1 and a shear wall 2. The sink side panel 1 and the shear wall 2 are connected by a steel reinforcement connection and a waterproofing structure. The steel reinforcement connection includes interconnected embedded steel bars 3 and lapped steel bars 4. The waterproofing structure includes a horizontal sealing strip and a waterproof coating. The waterproofing structure also includes a concave-convex structure 5 on the sink side panel 1, which helps to form a mechanical interlock with the shear wall 2. The combination of the steel reinforcement connection, the waterproofing structure, and the concave-convex interlock improves the reliability of the connection and the waterproof sealing.

[0037] Specifically, the precast bathroom basin side panel 1 is made of C35 reinforced concrete and reinforced with HRB400 grade longitudinal steel bars with a diameter of 10-14mm and a spacing of ≤200mm. The side of the basin side panel 1 is provided with a profiled thin wall, and grooves are distributed at intervals on the profiled thin wall. The cross-sectional shape of the grooves includes trapezoidal, rectangular or dovetail shapes. The embossed structure pressed on the side of the side panel is located on the profiled thin wall, including grid pattern, size 8-12mm×8-12mm; or oblique corrugation, wave height 3-5mm, wavelength 15-25mm), to enhance the mechanical interlocking with the cast-in-place structure.

[0038] Precast shear walls include: fully precast shear walls, which are prefabricated in the factory and have pre-drilled holes at the corresponding longitudinal reinforcement positions, with a diameter of 2-4mm, penetrating the thickness of the shear wall. Composite shear walls include precast and cast-in-place parts. The precast part has semi-pre-drilled holes with a depth ≥15 times the diameter of the reinforcement, and the cast-in-place part requires binding reinforcement and connection with the bottom reinforcement.

[0039] The profiled thin-walled steel sheet is galvanized steel sheet with a thickness of 0.5-3mm. It is pre-cut in the factory according to the node shape. It is spot-welded to the longitudinal steel bars (the weld spacing is 80-120mm and the weld diameter is 5-8mm). It is also welded to the pre-embedded bars of the shear wall with a weld length ≥50mm.

[0040] The grouting material should be high-strength, non-shrink grouting material of C40 or above, with an initial flowability ≥300mm, a 24h compressive strength ≥35MPa, and a 28d compressive strength ≥85MPa.

[0041] The waterproof structure includes: a horizontal sealing strip, filled at the joint between the galvanized steel plate and the base basin side plate 1, with a width of 20-30mm and an elongation rate ≥300%. The horizontal sealing strip is a water-swellable waterproofing strip and can also be pasted at the rounded corner of the base basin side plate 1 (rounded corner radius 15-25mm), with a water expansion ratio ≥200%. A waterproof coating, a polymer cement waterproof coating, with a thickness ≥1.5mm, covering the galvanized steel plate and a 50-80mm area on the outer side of the base basin side plate 1.

[0042] In addition, a concrete inverted curb is installed at the bottom of the side plate 1 of the base basin, with a height of 150-250mm, using C35 concrete, and reinforced with transverse steel bars of 6-8mm in diameter, spaced ≤200mm apart, which are tied to the longitudinal steel bars of the base basin. A buckling-resistance steel plate, 2-4mm thick, is covered with C30 concrete on both sides and fixed with M8-M12 tie bolts; the steel plate is welded to the transverse steel bars of the inverted curb. Shear-resistant steel members are made of I-beams (such as I10) or channel steel, spaced 250-350mm apart; the flanges are welded with studs and spot-welded to the longitudinal steel bars of the base basin.

[0043] Example 1:

[0044] Reference Figure 2 and Figure 3 This embodiment describes the connection node between the reinforced concrete precast bathroom sink side panel and the EMC precast shear wall, applicable to bathroom areas in prefabricated residential buildings. Due to functional requirements, the EMC precast shear wall presents two single-sided connection scenarios:

[0045] Node 1: For example Figure 2 As shown, the bathroom is close to the edge component of the shear wall 2 (such as the end column), and the bottom basin side plate 1 needs to be connected to the outside of the "end post" protruding on one side of the edge component. The joint is a "short joint" that fits the outline of the end post.

[0046] A corrugated metal pipe 6, with an inner diameter of 30mm, is partially arranged inside the end stack of the edge component, covering only the end stack area. Pre-embedded reinforcing bars 3 are installed inside the pipe. A trapezoidal groove is provided on the outer side of the end stack. A trapezoidal tenon and a grid-patterned embossed design are provided on the side facing the end stack. The tenon matches the trapezoidal groove of the end stack, and lapped reinforcing bars 4 are pre-embedded inside, extending 400mm outwards. The joint is a "short seam" that conforms to the outline of the end stack, with a length consistent with the width of the end stack.

[0047] Node 2: For example Figure 3 As shown, for the straight section of shear wall 2 in the bathroom (without protruding end piers), the basin side plate 1 needs to be connected along the entire length of one side of the wall, and the joint is a "continuous joint" extending along the wall.

[0048] A continuous metal corrugated pipe 6 is installed inside the wall, with pre-embedded steel bars 3 running through it; a rectangular groove is provided on one side of the wall, and a rectangular tenon and diagonal corrugated embossing are provided facing the side of the wall. The rectangular tenon matches the rectangular groove of the wall, and lapped steel bars 4 are pre-embedded inside. The joint is a "continuous joint" extending along the wall, with a length consistent with the span of the wall.

[0049] Example 2:

[0050] Reference Figure 4 and Figure 5 This embodiment addresses the scenario of a fully prefabricated bathroom sink side panel connected to two sides of an EMC prefabricated shear wall, including the two-side connection of the edge members of shear wall 2 and the two-side connection of the wall piers of shear wall 2. It is applicable to scenarios in prefabricated buildings where the bathroom needs to be arranged across both sides of shear wall 2.

[0051] Node 3: For example Figure 4 As shown, the edge members of the shear wall 2 corresponding to the bathroom (such as seismic end columns) need to be connected to the bottom basin side plate 1 on both sides of the edge members to enhance the reliability of the connection by utilizing the dense steel reinforcement of the edge members.

[0052] The edge components consist of rectangular end columns with symmetrically arranged corrugated metal pipes 6 on both sides, each containing pre-embedded reinforcing bars 3. Trapezoidal grooves are provided on both sides of the end column. Trapezoidal tenons and a grid-patterned embossed design are provided on both sides of the end column, with the tenons matching the grooves. Double-sided lapped reinforcing bars 4 are pre-embedded inside, extending 400mm outwards. The joints on both sides are symmetrical short joints that conform to the outline of the end column, with each side having the same length as the width of the end column.

[0053] Node 4: For example Figure 5 As shown, the bathroom has a shear wall pier 2 (a short protruding part of the wall body), and the basin side plate 1 needs to be connected to both sides of the pier to meet the small size and short span connection requirements of the pier.

[0054] The wall pier is a rectangular short limb, with corrugated metal pipes 6 partially arranged on both sides inside the pier, and pre-embedded steel bars 3 running through the pipes; rectangular grooves are provided on both sides of the wall pier. Rectangular tenons and diagonal corrugated patterns are provided on both sides of the wall pier, with the rectangular tenons matching the rectangular grooves of the wall pier, and double-sided lapped steel bars 4 pre-embedded inside, extending outwards by 350mm. The joints on both sides are "symmetrical short joints" that fit the outline of the wall pier, with the length of each side being the same as the width of the wall pier.

[0055] Both adopt a unified system of "double-sided straight threaded joint 7 steel bar connection + double-sided concave and convex structure mechanical interlocking + water-swellable waterstop strip + polymer cement waterproof coating". By adjusting the structure of the shear wall adaptation part and the interlocking shape of the bottom basin side plate 1, different double-sided connection scenarios can be met.

[0056] Example 3:

[0057] Reference Figure 6 and Figure 7 This embodiment addresses the scenario of a fully precast shear wall with a single-sided connection to a reinforced concrete precast bathroom sink side panel. It includes single-sided connection to the precast shear wall pier and single-sided connection to the precast shear wall pier at a non-end point. Both are based on a unified technical framework for single-sided connections, but are differentiated according to the positional characteristics of the shear wall pier. This approach is suitable for scenarios in prefabricated buildings where the bathroom needs to be connected to a single-sided shear wall pier.

[0058] Node 1: For example Figure 6 As shown, the bathroom corresponds to the end area of ​​the precast shear wall pier, and the side plate of the basin is connected to one side of the wall pier. The construction efficiency is improved by utilizing the simplicity of the end structure of the wall pier.

[0059] The end reinforcement of the wall pier consists of pre-embedded end-cut steel bars 3, 16mm in diameter, extending 350mm outwards, with straight threaded joints at the ends. A trapezoidal groove is provided at the end of the wall pier, and a trapezoidal tenon and grid-patterned embossing are provided on the side facing the end of the wall pier. The trapezoidal tenon matches the trapezoidal groove of the wall pier. Lap reinforcement bars 4 are pre-embedded internally, extending 400mm outwards, with joints adapted to the wall pier reinforcement bars. The end-cut steel bars of the wall pier are connected to the lap reinforcement bars of the base plate in a one-to-one straight thread connection, with no additional steel bars passing through.

[0060] Node 2: For example Figure 7 As shown, the bathroom corresponds to the non-end area (middle section of the precast shear wall pier), and the bottom basin side plate 1 is connected to one side of the wall pier. It is necessary to take into account the distribution of steel bars and the reliability of connection in the non-end area of ​​the wall pier.

[0061] The non-end reinforcement of the wall pier consists of continuous embedded steel bars (3), 16mm in diameter, penetrating the wall pier, with the connecting section extending outwards with a straight threaded joint. A rectangular groove is provided at the non-end of the wall pier, with a rectangular tenon and oblique corrugated embossing on the side facing the non-end. The rectangular tenon matches the rectangular groove of the wall pier. An embedded lapped steel bar (4) extends 400mm outwards, with a joint adapted to the wall pier reinforcement. The continuous reinforcement of the wall pier is connected to the lapped reinforcement of the base plate with a one-to-one straight threaded connection, ensuring the rigidity of the non-end connection.

[0062] Both adopt a unified system of "straight threaded joint steel bar connection + concave-convex structure mechanical interlocking + water-swellable waterstop strip + polymer cement waterproof coating". By adjusting the steel bar connection details of the wall pier and the interlocking precision of the bottom plate, different single-sided connection scenarios can be met.

[0063] Example 4:

[0064] Reference Figure 8 and Figure 9 This embodiment addresses the scenario of a fully precast shear wall with reinforced concrete side panels for the bathroom sink, including both sides of the precast shear wall and the non-end sides of the precast shear wall pier. It is applicable to prefabricated buildings where the bathroom needs to be arranged across both sides of a fully precast shear wall.

[0065] Node 3: For example Figure 8 As shown, the bathroom corresponds to the conventional wall section of the fully prefabricated shear wall, with the basin side panels connected on both sides of the wall, utilizing the continuous structure of the wall to ensure the integrity of the connection;

[0066] The wall section is a continuous rectangle, with double-sided corrugated metal pipes (6) of 30mm inner diameter running along the entire length of the wall. Pre-embedded reinforcing bars (3) are run through the pipes. Trapezoidal grooves are provided on both sides of the wall, with trapezoidal tenons and a grid-patterned embossed design on both sides. The trapezoidal tenons match the trapezoidal grooves, and double-sided lapped reinforcing bars (4) are pre-embedded inside. The joints on both sides are continuous joints extending along the wall, with a length consistent with the wall span.

[0067] Node 4: For example Figure 9 As shown, in the non-end area of ​​the wall pier corresponding to the fully prefabricated shear wall 2 in the bathroom, the basin side plate 1 is connected on both sides of the non-end of the wall pier, and the small size of the wall pier and the reliability of the connection on both sides need to be taken into account.

[0068] The non-end sections of the wall pier are rectangular short limbs, with double-sided corrugated metal pipes (25mm inner diameter) partially arranged within each limb, covering only the pier area. Pre-embedded reinforcing bars (3) are run through the pipes. Rectangular grooves are provided on both sides of the wall pier, with rectangular tenons and diagonal corrugated patterns on both sides. The rectangular tenons match the rectangular grooves of the wall pier, and double-sided lapped reinforcing bars (4) are pre-embedded inside, extending 350mm outwards. The double-sided joints are symmetrical short joints conforming to the outline of the wall pier, with each side having the same length as the width of the wall pier.

[0069] Both adopt a unified system of "double-sided straight threaded joint steel bar connection + double-sided concave-convex structure mechanical interlocking + water-swellable waterstop strip + polymer cement waterproof coating". By adjusting the structural details of the adaptable part of shear wall 2 and the interlocking shape of bottom basin side plate 1, different double-sided connection scenarios can be met.

[0070] Example 5:

[0071] Reference Figure 10 and Figure 11 This embodiment addresses the connection scenario between the side panel of a fully precast reinforced concrete bathroom sink and a composite shear wall, including single-sided and double-sided connections of the composite shear wall. Based on the structural characteristics of the composite shear wall—a "precast layer + cast-in-place layer"—differentiated adaptations are made according to the single / double-sided connection requirements, as detailed below:

[0072] Node 1: For example Figure 10 As shown, this method is applicable to scenarios where a precast reinforced concrete bathroom sink side panel is connected to a single side of a composite shear wall. It utilizes the characteristic of composite shear walls that "the precast layer provides a reference and the cast-in-place layer strengthens the connection" to achieve a reliable connection on one side.

[0073] The precast layer of the composite shear wall uses single-sided embedded steel bars 3, extending outward to the cast-in-place layer area with a length of 400mm; a trapezoidal groove is provided on the single-sided surface, and a trapezoidal tenon and grid pattern embossing are provided on the side facing the composite shear wall 2, with the trapezoidal tenon matching the trapezoidal groove of the precast layer; single-sided lapped steel bars 4 with a diameter of 16mm are embedded internally, extending outward with straight threaded joints. Distribution bars are configured to form a single-sided connection and reinforcement system with the bottom plate side plate and the precast layer steel bars.

[0074] Node 2: For example Figure 11 As shown, this method is suitable for scenarios where reinforced concrete precast bathroom sink side panels are connected on both sides of a composite shear wall. By using "precast layer positioning + cast-in-place layer overall wrapping" on both sides of the composite shear wall, the integrity and waterproofness of the connection on both sides are ensured.

[0075] Symmetrical 16mm diameter steel bars are pre-embedded on both sides, extending 400mm into the cast-in-place layer area; rectangular grooves are provided on both sides, and rectangular tenons and diagonal corrugated patterns are provided on both sides facing the composite shear wall. The rectangular tenons match the rectangular grooves of the precast layer; four lapped steel bars with a diameter of 16mm are pre-embedded internally, extending outward with straight threaded joints. Distribution bars are configured to enhance the overall load-bearing performance of the double-sided connection.

[0076] Both adopt the technical system of "precast steel reinforcement in composite shear wall + steel reinforcement connection in cast-in-place layer + mechanical interlocking of concave and convex structure + water-swellable waterstop strip + polymer cement waterproof coating".

[0077] Example 6:

[0078] Reference Figure 12 and Figure 13 This embodiment addresses the connection scenario between the side panel of a fully precast reinforced concrete bathroom sink and a composite shear wall, including single-sided connections with partial structural elements and double-sided connections with reinforced structural elements. Based on the core structure of the composite shear wall—a "precast layer + cast-in-place layer"—it adapts to the differentiated requirements of single-sided / double-sided connections, as detailed below:

[0079] Node 3: For example Figure 12 As shown, this method is applicable to scenarios where a precast reinforced concrete bathroom sink side panel is connected to a single side of a composite shear wall, and the precast layer of the composite shear wall has a localized reinforcement structure on one side (such as specific steel bar arrangement or texture optimization). The reliability of the single-sided connection is improved through localized reinforcement.

[0080] The precast layer of the composite shear wall adopts a single-sided pre-embedded steel bar 3, extending outward to the cast-in-place layer area with a length of 450mm; the single-sided surface is provided with a trapezoidal groove and local grid embossing, the groove spacing is 220mm and the groove depth is 18mm; the side facing the composite shear wall is provided with a trapezoidal tenon and matching grid embossing; the single-sided lapped steel bar 4 is pre-embedded inside; and distribution bars are configured to strengthen the force transmission in the single-sided connection area.

[0081] Node 4: For example Figure 13 As shown, this method is suitable for precast reinforced concrete bathroom sink side panels with double-sided connections in composite shear walls, where the precast layer of the composite shear wall has reinforced connection structures on both sides, such as symmetrical steel bar anchorage and double-sided concave-convex interlocking optimization, to ensure the integrity and waterproof sealing of the double-sided connection.

[0082] The precast layer of the composite shear wall adopts double-sided symmetrical pre-embedded steel bars 3, which extend outward to the cast-in-place layer area with a length of 450mm; rectangular grooves and symmetrical oblique corrugated embossing are provided on both sides of the surface; rectangular protrusions and matching oblique corrugated embossing are provided on both sides facing the composite shear wall; double-sided lapped steel bars 4 are pre-embedded inside; and distribution bars are configured to form a double-sided symmetrical stress enhancement system.

[0083] Both rely on a technical system of "pre-embedded steel bars in the precast layer of the composite shear wall + steel bar connection in the cast-in-place layer + mechanical interlocking of the concave and convex structure + water-swellable waterstop strip + polymer cement waterproof coating", and adapt to different connection requirements by adjusting the structural details of the precast layer.

[0084] like Figure 14 As shown, in preferred embodiments, the profiled thin wall forming the convex-concave structure 5 mainly includes three shapes: Type I, Type II, and Type III, with the cross-sectional shapes of the grooves corresponding to trapezoidal, dovetail, and rectangular shapes, respectively. The profiled thin wall is mainly made of 0.5–1 mm thick prefabricated galvanized or undyed steel sheet specifically for anti-reverse supports. The groove depth is approximately 15 mm, the groove width is 40–50 mm, and the spacing between adjacent grooves is 50–70 mm. In all the above embodiments, the convex-concave structure 5 is exemplified by Type I.

[0085] The specific dimensions and shape of the concave-convex structure 5 are designed and used according to the specific project requirements and are not specifically limited here.

[0086] This utility model improves the mechanical reliability and shear resistance of the connection through the synergistic effect of the steel bar connection structure, the water-stop structure and the interlocking of the concave and convex mechanical joints, and strengthens the waterproof sealing to prevent leakage. At the same time, it is suitable for single-sided / double-sided connection scenarios of precast shear walls and composite shear walls, with flexible construction methods (straight thread joints, steel plate welding, cast-in-place lap joints, etc.), reducing precision requirements, improving construction efficiency, and having a wider range of applications.

[0087] The specific embodiments of this utility model have been described above, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

[0088] In the description of this utility model, it should be understood that the terms "upper," "lower," "inner," "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The simple fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used for improvement. Any reference signs in the claims should not be construed as limiting the scope.

Claims

1. A connection structure between the side panel of a precast reinforced concrete bathroom sink and a shear wall, characterized in that, The system includes a precast reinforced concrete bathroom sink side panel and a shear wall; the sink side panel and the shear wall are connected by a steel reinforcement connection structure and a water-stop structure; the steel reinforcement connection structure includes interconnected embedded steel bars and lapped steel bars, the water-stop structure includes a horizontal sealing strip and a waterproof coating, and the water-stop structure also includes a concave-convex structure set on the sink side panel, which is used to assist in forming a mechanical interlock with the shear wall.

2. The connection structure between the reinforced concrete precast bathroom sink side panel and the shear wall according to claim 1, characterized in that, The shear wall is a precast shear wall, and a metal corrugated pipe is embedded in the precast shear wall. The embedded steel bars are inserted into the metal corrugated pipe, and grout is injected into the metal corrugated pipe.

3. The connection structure between the reinforced concrete precast bathroom sink side panel and the shear wall according to claim 2, characterized in that, A straight threaded joint is provided at the connection node between the precast shear wall and the bottom basin side plate. The straight threaded joint is used to connect the embedded steel bars and the lapped steel bars.

4. The connection structure between the reinforced concrete precast bathroom sink side panel and the shear wall according to claim 2, characterized in that, The bottom basin side plate is set on one side of the precast shear wall, and the one side of the precast shear wall is connected to the bottom basin side plate by steel plate welding and steel bar lap splicing in conjunction with the water-stop structure.

5. The connection structure between the reinforced concrete precast bathroom sink side panel and the shear wall according to claim 2, characterized in that, The bottom basin side plates are provided on both sides of the precast shear wall. Both sides of the precast shear wall are connected to the corresponding bottom basin side plates by steel plate welding and steel bar lap splicing in conjunction with the water-stop structure.

6. The connection structure between the reinforced concrete precast bathroom sink side panel and the shear wall according to claim 1, characterized in that, The shear wall is a composite shear wall, which includes a precast shear wall layer and a cast-in-place concrete layer. The embedded steel bars are embedded in the precast shear wall layer, and the lapped steel bars are lapped with the embedded steel bars in the cast-in-place concrete layer.

7. The connection structure between the reinforced concrete precast bathroom sink side panel and the shear wall according to claim 6, characterized in that, The bottom basin side plate is disposed on one side of the composite shear wall, and the one side of the composite shear wall is connected to the water-stop structure and the bottom basin side plate through the steel reinforcement connection structure.

8. The connection structure between the reinforced concrete precast bathroom sink side panel and the shear wall according to claim 6, characterized in that, The bottom basin side plate is provided on both sides of the composite shear wall, and both sides of the composite shear wall are connected to the water-stop structure and the corresponding bottom basin side plate through the steel reinforcement connection structure.

9. The connection structure between the reinforced concrete precast bathroom sink side panel and the shear wall according to any one of claims 1-8, characterized in that, The concave-convex structure includes grooves and embossings spaced apart along the side of the base plate. The grooves are trapezoidal, rectangular, or dovetail-shaped, and the embossings are grid patterns or diagonal wavy patterns.

10. The connection structure between the reinforced concrete precast bathroom sink side panel and the shear wall according to any one of claims 1-8, characterized in that, The horizontal sealing strip is a water-swellable waterproofing strip, and the waterproof coating is a polymer cement waterproof coating.

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