A profiled thin-wall embedded reverse ridge structure and a fully prefabricated toilet bottom basin structure

Abstract

The utility model discloses a kind of profiled thin-wall embedded anti-knock structure and reinforced concrete full prefabricated bathroom bottom basin structure, it is related to the field of fabricated building.The anti-knock structure includes profiled thin-wall body, its at least two adjacent side is equipped with the concave-convex structure containing groove and through-hole, groove is trapezoidal and / or dovetail shape, through-hole is arrayed and contains multiple hole type, groove bottom wall is also equipped with through-hole;Full prefabricated bathroom bottom basin structure includes the anti-knock structure and prefabricated floor, anti-knock annular is located at floor edge and integrally pours, and inside side element anti-knock is equipped on floor.The utility model is formed by concave-convex structure and cast-in-place concrete to form three-dimensional mechanical occlusion, strengthen connection strength and shear resistance, reduce leakage risk, improve construction efficiency, applicable to fabricated building.

Description

Technical Field

[0001] This utility model belongs to the field of prefabricated building technology, specifically relating to a profiled thin-walled embedded inverted retaining wall structure and a fully prefabricated bathroom basin structure. Background Technology

[0002] In prefabricated buildings, the waterproofing performance and structural integrity of bathroom sinks are key factors affecting building quality. Traditional bathroom curbs are mostly constructed using on-site casting, which has problems such as long construction periods, high formwork consumption, and weak connections with precast components.

[0003] A Chinese utility model patent with publication number CN 216949672 U discloses a fully prefabricated bathroom and a fully prefabricated multi-bathroom structure with an embedded backsplash. The structure includes a prefabricated base slab, prefabricated backsplashes, and plain backsplashes. The prefabricated backsplashes include wall-mounted backsplashes, beam-mounted backsplashes, and independent backsplashes. The bathroom walls correspond to the wall-mounted backsplashes, and the bathroom beams correspond to the beam-mounted backsplashes. Independent backsplashes connect the wall-mounted and beam-mounted backsplashes, enclosing them on the prefabricated base slab. The wall-mounted backsplashes are provided with first horizontal stirrups and first vertical reinforcing bars. A first concrete layer is poured laterally on the sides and top of the wall-mounted backsplashes to form the wall. The beam-mounted backsplashes are provided with beam stirrups and second vertical reinforcing bars. A second concrete layer is poured laterally on the sides and top of the beam-mounted backsplashes to form the wall. This vertical stacking method ensures the integrity of the vertically stacked prefabricated wall and beam structure, better meeting the stress requirements of the wall and beam structure.

[0004] However, although the precast inverted curb reduces on-site wet work, the connection with the cast-in-place concrete structure relies heavily on surface bonding. The smooth contact surface can lead to insufficient interlocking, resulting in the risk of slippage or leakage, which makes it difficult to meet the requirements of high-quality prefabricated buildings.

[0005] To address the aforementioned issues, this utility model proposes a profiled thin-walled embedded inverted retaining wall structure and a fully prefabricated bathroom basin structure. By setting a special concave-convex structure on the side of the profiled thin-walled wall, the mechanical interlocking with the cast-in-place concrete is enhanced. At the same time, it provides a fully prefabricated bathroom basin structure including this structure, thereby improving the overall performance of the bathroom. Utility Model Content

[0006] This utility model aims to solve the problems of weak connection between existing precast inverted curbs and cast-in-place concrete, insufficient waterproof performance, and low construction efficiency. It provides a profiled thin-walled embedded inverted curb structure and a fully precast bathroom basin structure that enhances connection strength and optimizes waterproof effect through mechanical interlocking.

[0007] Firstly, this utility model proposes a profiled thin-walled embedded inverted retaining wall structure, comprising a profiled thin-walled body having at least two adjacent side surfaces, each side surface being provided with a concave-convex structure for mechanically engaging with cast-in-place concrete. The concave-convex structure includes grooves and through holes spaced apart along the length of the profiled thin-walled body. The three-dimensional mechanical engagement formed by the grooves and through holes enhances the connection strength with the cast-in-place concrete, improves shear resistance, reduces the risk of leakage, and increases construction efficiency.

[0008] Preferably, the opening of the groove faces the outer side of the profiled thin-walled body, and the depth direction of the groove is perpendicular to the side surface of the profiled thin-walled body. This ensures that the cast-in-place concrete can fully fill the groove to form an effective interlock.

[0009] Preferably, the groove is trapezoidal and / or dovetail-shaped. Such shapes enhance the shear resistance of the cast-in-place concrete through a "barb" effect, preventing relative slippage.

[0010] More preferably, the through holes are arranged in an array along the length and width directions of the profiled thin-walled body. This allows the cast-in-place concrete to form a three-dimensional interlocking structure through the through holes, improving the overall connection strength.

[0011] More preferably, the through hole includes one or more of the following: large and small holes, round holes, embossed holes, large fish-scale holes, small fish-scale holes, willow-leaf holes, and fish-eye holes. Different hole types can adapt to different stress scenarios: embossed holes enhance gripping force through raised structures; fish-scale holes form gradient interlocking through layered distribution; willow-leaf holes improve in-plane shear resistance through elongated structures.

[0012] Preferably, the bottom wall of the groove is also provided with the through hole. This allows the cast-in-place concrete in the groove to connect with the concrete in the side through hole, constructing a "groove-through hole" synergistic interlocking system and enhancing the overall structural integrity.

[0013] Preferably, the profiled thin-walled body is further provided with vertical reinforcing bars, one end of which protrudes from the top wall of the profiled thin-walled body, and the protruding end of the vertical reinforcing bar is inclined towards the side. This works in conjunction with the cast-in-place concrete and the uneven structure to transfer force, enhancing shear bearing capacity, improving connection reliability, adapting to construction, and also ensuring waterproofing.

[0014] Secondly, this utility model also proposes a fully prefabricated bathroom basin structure, including a profiled thin-walled embedded inverted curb structure as described in any of the first aspects, and a prefabricated base plate. The profiled thin-walled embedded inverted curb structure is arranged in a ring around the edge of the prefabricated base plate and is integrally cast with the prefabricated base plate. This achieves factory prefabrication and reduces on-site construction procedures.

[0015] Preferably, the precast base slab is further provided with a plurality of intersecting transverse and longitudinal reinforcing bars, one end of each of the transverse and longitudinal reinforcing bars protruding from the side wall of the precast base slab. This arrangement creates a three-dimensional stress network between the transverse and longitudinal reinforcing bars, and the protruding ends can connect with the profiled thin-walled steel and cast-in-place structural reinforcing bars, thereby strengthening the overall rigidity of the base slab, improving crack resistance and load-bearing capacity, and ensuring structural synergy.

[0016] Preferably, the precast base plate is further provided with a plain inverted retaining wall, which is located inside the profiled thin-walled embedded inverted retaining wall structure. This forms a double waterproof barrier with the profiled thin-walled inverted retaining wall, improving the waterproofing performance of the bathroom.

[0017] Compared with the prior art, the beneficial results of this utility model are as follows:

[0018] (1) Significantly improved connection strength: Through the concave-convex structure composed of grooves and through holes, it forms a mechanical interlock with the cast-in-place concrete. The grooves form concrete tenons and the through holes form concrete bolts, upgrading the traditional "surface contact" to "three-dimensional interlocking", greatly enhancing the shear and tensile strength, and effectively preventing relative slippage between precast and cast-in-place structures.

[0019] (2) Waterproof performance optimization: The trapezoidal / dovetail groove and through hole work together to block the water seepage path, and together with the inner plain wall, they form multiple waterproof defenses to reduce the risk of leakage; the through hole at the bottom of the groove makes the concrete filling more compact and avoids the risk of water accumulation.

[0020] (3) Improved construction efficiency: The profiled thin-walled body serves as the side template of the inverted wall and is cast in one piece with the precast base plate, reducing the on-site formwork and demolding process; factory production ensures the accuracy of components, and only the on-site part needs to be hoisted into place before the cast-in-place part is poured, shortening the construction cycle.

[0021] (4) Strong applicability: The combination of various hole types and grooves can be adapted to different building scenarios (such as wall connection and beam connection) to meet diverse stress requirements; the ring-shaped anti-sill structure is suitable for various bathroom layouts and has good versatility. Attached Figure Description

[0022] 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.

[0023] Figure 1 A side view of the pressed thin-walled embedded inverted retaining structure according to Embodiment 1 of the present invention is shown;

[0024] Figure 2 A schematic diagram of the groove shape according to Embodiment 1 of the present invention is shown;

[0025] Figure 3 A schematic diagram showing the through-hole shape of a large and small hole according to an embodiment of the present invention is shown;

[0026] Figure 4 A schematic diagram showing the through-hole shape as a bulging hole according to an embodiment of the present invention is shown;

[0027] Figure 5 A schematic diagram showing the through-hole shape as a large fish scale hole according to an embodiment of the present invention is shown;

[0028] Figure 6 A schematic diagram showing the through-hole shape as small fish scale holes according to an embodiment of the present invention is shown;

[0029] Figure 7 A schematic diagram showing a willow leaf-shaped through hole according to an embodiment of the present invention is shown;

[0030] Figure 8 A schematic diagram showing a through-hole shaped like a fisheye hole according to an embodiment of the present invention is shown;

[0031] Figure 9 A schematic diagram of the overall structure of the fully prefabricated bathroom basin according to Embodiment 2 of this utility model is shown;

[0032] Figure 10 This shows an overall structural schematic diagram of the fully prefabricated bathroom basin structure according to Embodiment 2 of the present invention from another perspective;

[0033] Figure 11 A schematic diagram of the connection node between the prefabricated bathroom basin structure and the cast-in-place shear wall according to the present invention is shown.

[0034] Figure 12 A schematic diagram of the connection node between the adjacent prefabricated bathroom sink structure and the cast-in-place shear wall according to the present invention is shown.

[0035] Figure 13 A schematic diagram of the connection node between the prefabricated bathroom sink structure and the outer frame beam according to this utility model is shown.

[0036] Figure 14 A schematic diagram of the connection node between the adjacent prefabricated bathroom sink structure and the cast-in-place beam according to the present invention is shown.

[0037] Figure 15 A schematic diagram is shown of the connection node between the prefabricated bathroom basin structure and the 100mm partition wall beam with an external embedded beam according to the present invention.

[0038] The meanings of the numbers in the figure are as follows: 1. Pressed thin-walled body; 2. Side; 3. Groove; 4. Through hole; 5. Precast base plate; 6. Plain inverted curb. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] like Figures 1 to 15 As shown, the embodiments of this utility model disclose a profiled thin-walled embedded inverted curb structure and a fully prefabricated reinforced concrete bathroom basin structure. The specific implementation methods are as follows:

[0042] Example 1:

[0043] like Figure 1 As shown, the profiled thin-walled embedded inverted retaining wall structure of this embodiment includes a profiled thin-walled body 1, which is made of galvanized steel sheet and has two vertically adjacent sides 2 to fit the corner of the bathroom. In this embodiment, the thickness of the profiled thin-walled body 1 is 2-4mm.

[0044] Furthermore, the side surface 2 is provided with a concave-convex structure, including grooves 3 and through holes 4 spaced apart along the length direction. The grooves and through holes form a three-dimensional mechanical interlock, which enhances the connection strength with the cast-in-place concrete, improves shear resistance, reduces the risk of leakage, and improves construction efficiency.

[0045] The opening of the groove 3 faces the outer side of the pressed thin-walled body 1, the depth direction is perpendicular to the side 2, and the cross-section is trapezoidal and / or dovetail-shaped, as shown in the reference. Figure 1 and Figure 2 Ensure that the cast-in-place concrete fully fills the groove to form an effective interlock. Such trapezoidal and / or dovetail shapes can enhance the shear resistance of the cast-in-place concrete through the "barb" effect, preventing relative slippage.

[0046] It should be noted that the cross-sectional shape of the groove can be trapezoidal, dovetail-shaped, or designed as one or more trapezoidal sections with one or more dovetail-shaped sections. The design can be flexibly adapted to actual needs, which will not be elaborated on here.

[0047] In one specific embodiment, the cross-section of the groove 3 is dovetail-shaped, with an upper opening width of 30mm, a lower opening width of 20mm, a depth of 15mm, and a spacing of 150mm between adjacent grooves 3.

[0048] The through holes 4 are arranged in an array along both the length and width directions, allowing the cast-in-place concrete to form a three-dimensional interlocking structure, thus improving the overall connection strength. In this embodiment, the spacing of the through holes 4 along the length direction is 100mm, and the spacing along the width direction is 80mm. Figure 1 As shown, in this embodiment, the through hole 4 is a circular hole.

[0049] Preferably, the through hole 4 includes one or more of the following: large and small holes, round holes, embossed holes, large fish-scale holes, small fish-scale holes, willow-leaf holes, and fish-eye holes, such as... Figures 3-7 As shown. Different hole types can be adapted to different stress scenarios: the bulging hole enhances the gripping force through the raised structure; the fish scale hole forms a gradient interlocking through the stacked distribution; the willow leaf hole improves the in-plane shear resistance through the elongated structure.

[0050] In one specific embodiment, the through hole 4 includes a raised hole and small fish-scale holes. The raised hole has a diameter of 15 mm and an outward protrusion height of 5 mm; the small fish-scale holes have a major axis of 20 mm and a minor axis of 10 mm, and the two hole types are distributed alternately.

[0051] In a further preferred embodiment, an 8mm diameter circular hole is provided on the bottom wall 31 of the groove, which communicates with the through hole 4 on the side 2. This allows the cast-in-place concrete in the groove to connect with the concrete in the through hole on the side, constructing a "groove-through hole" synergistic interlocking system and enhancing the overall structural integrity.

[0052] The diameter of the through hole 4 is adapted to the actual needs, and the wall of the through hole 4 is roughened (such as roughening or sandblasting), or the opening is chamfered / flared at an angle of 30°-60° to further enhance the friction and connection stability with the cast-in-place concrete.

[0053] Specifically, the holes include alternating large-diameter and small-diameter through holes, with the diameter of the large-diameter through holes being 1.5-3 times the diameter of the small-diameter through holes. The hole walls of the embossed holes protrude outwards from the outer side of the pressed thin-walled body to form hemispherical bulges, with a bulge height of 5-10mm. The inner sidewalls of the bulges are provided with annular reinforcing ribs to enhance the interlocking force between the cast-in-place concrete and the hole walls.

[0054] The fish scale pores are scale-shaped through holes. Large fish scale pores and small fish scale pores are distributed in an alternating and overlapping manner. The edges of the fish scales are inclined towards the inner side of the pressed thin-walled body at an angle of 10°-25°, forming a "barbed" interlocking structure.

[0055] The willow leaf-shaped hole is a long, narrow through hole with its length direction forming an angle of 45°-60° with the length direction of the side plate. The two ends of the hole are rounded, and the hole wall has axial raised grooves spaced at 2-3mm intervals to increase the frictional resistance with the cast-in-place concrete.

[0056] In one specific embodiment, the profiled thin-walled body 1 includes a wall-mounted section, an independent section, and a beam-mounted section connected in sequence. The side through holes of the wall-mounted section are mainly fish-scale holes, the side through holes of the beam-mounted section are mainly embossed holes, and the side through holes of the independent section are a combination structure of large and small holes.

[0057] Preferably, vertical reinforcing bars are pre-installed on the inner side of the profiled thin-walled body 1, with the upper ends of the vertical reinforcing bars protruding from the top wall of the profiled thin-walled body and spaced apart along the length direction. This works in conjunction with the cast-in-place concrete and the convex-concave structure to transfer force, enhancing shear bearing capacity, improving connection reliability, facilitating construction, and ensuring waterproofing.

[0058] In one specific embodiment, the vertical reinforcing bars have a diameter of 12mm, are spaced every 150mm along the length, protrude 200mm, and are inclined to the side at an angle of 30°. The lower end of the vertical reinforcing bar is embedded inside the profiled thin-walled body, with an embedded section length of 240mm (≥20 times the diameter of the reinforcing bar). A 30mm diameter, 5mm thick barbed anchoring plate is welded to the end, with serrated edges that tightly engage with the inner wall of the profiled thin-walled body to prevent the reinforcing bar from loosening. The surface of the protruding section is provided with continuous spiral ribs with a rib height of 4mm and a pitch of 15mm.

[0059] Example 2:

[0060] like Figure 9 and 10 As shown, the fully prefabricated bathroom sink structure of this embodiment includes the profiled thin-walled embedded inverted curb structure and prefabricated base plate 5 described in Embodiment 1:

[0061] The precast base slab 5 is made of cast concrete and contains several intersecting transverse and longitudinal reinforcing bars forming a two-way reinforcing mesh. One end of each transverse and longitudinal reinforcing bar protrudes from the side wall of the precast base slab.

[0062] In one specific embodiment, the precast base slab 5 is cast with C35 concrete and internally reinforced with interlaced transverse and longitudinal reinforcing bars. The diameter of both transverse and longitudinal reinforcing bars is 10mm, forming a two-way reinforcing mesh with a spacing of 150mm. The ends of both transverse and longitudinal reinforcing bars protrude from the sidewall of the precast base slab by a length of 100mm.

[0063] The transverse reinforcing bars have protruding ends bent to form "U-shaped connections," with an opening width of 14mm, ≥ the diameter of the vertical reinforcing bars + 2mm. The longitudinal reinforcing bars have protruding ends bent into an "L" shape. This design creates a three-dimensional stress network between the transverse and longitudinal reinforcing bars. The protruding ends can connect with the profiled thin-walled and cast-in-place structural reinforcing bars, strengthening the overall rigidity of the base, improving crack resistance and load-bearing capacity, and ensuring structural synergy.

[0064] A profiled thin-walled embedded inverted curb structure is annularly enclosing the edge of the precast base plate 5 and is integrally cast with the precast base plate 5. In this embodiment, the height of the inverted curb is 200mm.

[0065] A plain retaining wall 6 is provided on the upper surface of the precast base slab 5, located inside the profiled thin-walled retaining wall. The plain retaining wall 6 and the profiled thin-walled retaining wall form a double waterproof barrier, improving the waterproof performance of the bathroom. In this embodiment, the plain retaining wall 6 has a height of 100mm and a width of 80mm. A 50mm wide annular gap is formed between the precast base slab 5 and the plain retaining wall 6 for filling with waterproof sealant.

[0066] In one specific embodiment, an annular waterproof groove is formed between the plain retaining wall 6 and the inner wall of the profiled thin-walled body 1. The bottom of the annular waterproof groove is provided with a drainage hole, which is connected to the drainage system of the precast base plate 5.

[0067] This utility model's fully prefabricated bathroom basin structure achieves coordinated connection with cast-in-place shear walls and frame beams through multiple scene nodes. The following is a combination of... Figures 11-15 Node description:

[0068] like Figure 11 As shown, the "steel plate + steel reinforcement" connection system between the side panel (side 2) of the prefabricated bathroom sink structure and the cast-in-place shear wall is as follows:

[0069] The longitudinal reinforcement (diameter 12mm) of the bottom basin side plate (side 2) is inserted into the horizontal reserved hole (diameter 14mm, spacing 200mm) of the cast-in-place shear wall, and the hole is filled with C40 grout. The anchorage length of the reinforcement is 200mm (≥15d).

[0070] A 0.5mm thick galvanized steel plate (or plain steel plate) is installed between the base basin side plate and the shear wall. The steel plate is spot-welded to the longitudinal reinforcement of the base basin (weld spacing 100mm, diameter 6mm). The surface of the steel plate is coated with anti-corrosion paint (2mm thick).

[0071] 6@200 stud bars are pre-embedded on the outside of the steel plate in a staggered pattern. One end of the stud bar is spot-welded to the steel plate, and the other end is anchored into the shear wall (anchorage length 150mm) to form a force transmission zone of "steel bar-steel plate-shear wall".

[0072] like Figure 12As shown, the adjacent prefabricated bathroom sinks have separate side panels (side 2), which are connected to the cast-in-place shear wall using a "double steel plate + waterproof" connection system.

[0073] The longitudinal reinforcement bars (12mm in diameter) of the adjacent bottom basin side plates are inserted into the horizontal reserved holes (14mm in diameter, 200mm apart) of the shear wall, and the holes are filled with C40 grout. The ends of the reinforcement bars are bent at 90° (80mm in length). Two 0.5mm thick galvanized steel plates (30mm apart) are installed between the bottom basin side plates and the shear wall. The steel plates are spot welded to the longitudinal reinforcement bars of the bottom basin (100mm apart). Elastic sealant is filled between the two steel plates.

[0074] The top of the steel plate is matched with the rounded corner (radius 20mm) of the side plate of the basin, and a water-swellable waterproof strip (width 20mm) is pasted at the rounded corner to form a "double steel plate + double waterproof" structure.

[0075] like Figure 13 As shown, the "tie bar + web bar" connection system between the precast bathroom sink side panel (side 2) and the outer frame beam is as follows:

[0076] The longitudinal reinforcement bars (diameter 12mm) of the bottom basin side plate are inserted into the reserved holes (diameter 14mm, spacing 200mm) of the outer frame beam, and the holes are filled with C40 grout. The anchorage length of the reinforcement bars is 200mm (≥15d).

[0077] Horizontal tie bars (8mm in diameter, 200mm spacing) and web bars (10mm in diameter, 200mm spacing) are installed inside the outer frame beam. The tie bars are tied to the longitudinal bars of the bottom basin, and the web bars are spot welded to the embedded steel plate (0.5mm thick galvanized plate) of the bottom basin side plate.

[0078] The joint between the bottom basin side plate and the frame beam is filled with 1:2.5 cement mortar (20mm thick), with 5% waterproofing agent added to the mortar, forming a "reinforcing bar-beam reinforcement-steel plate" force transmission + waterproofing system.

[0079] like Figure 14 As shown, the connection system between the adjacent precast bathroom sink (precast base slab 5) and the cast-in-place beam is "through reinforcement + steel plate sealing":

[0080] The longitudinal reinforcement bars (12mm in diameter) of the adjacent bottom basins pass through the reserved holes (14mm in diameter, 200mm spacing) of the cast-in-place beams, and the holes are filled with C40 grout. The length of the reinforcement bars is 500mm (≥30d).

[0081] A 0.5mm thick galvanized steel plate (or plain steel plate) is installed on the top of the cast-in-place beam. The steel plate is spot-welded to the longitudinal reinforcement of the bottom basin (weld spacing 100mm). The steel plate covers the joint between the top of the beam and the side plate of the bottom basin.

[0082] The steel plate surface is coated with a cement-based penetrating crystalline waterproof coating (1.5mm thick), which extends to the bottom plate side panel (covering height 50mm), forming a "through steel bar-steel plate-waterproof coating" waterproof force transmission system.

[0083] like Figure 15 As shown, the connection system of the prefabricated bathroom sink (prefabricated base plate 5) and the 100mm partition wall beam with an external offset beam is described as follows:

[0084] A 200mm high concrete curb is installed on the outer side of the partition wall beam. A 0.5mm thick galvanized steel plate (500mm long and 100mm wide) is pre-embedded in the curb. The steel plate is spot-welded to the longitudinal reinforcement of the bottom basin side plate (weld spacing 100mm).

[0085] The longitudinal reinforcement (12mm in diameter) of the bottom basin side plate is anchored into the inverted wall (anchorage length 150mm). The inverted wall is equipped with 6@200 longitudinal reinforcement and 6@200 distribution reinforcement, which are tied to the longitudinal reinforcement of the bottom basin to form an integral whole.

[0086] The top of the inverted sill matches the rounded corner (radius 20mm) of the side plate of the base basin. The rounded corner is filled with elastic sealant (width 20mm), and the sealant works in conjunction with the galvanized steel plate to provide waterproofing.

[0087] Through the synergistic force transfer of "reinforcing steel - steel plate - cast-in-place structure", the shear bearing capacity of the joint is improved (compared to traditional connections). The spot welding connection between the steel plate and the reinforcing steel ensures a continuous force transfer path, and the grouting filling ensures the compactness of the joint. The multi-layer waterproof system of "double steel plate + sealant + waterproof coating" ensures that the leakage rate of the joint is ≤0.1% (tested according to GB / T 29906-2013). The anti-corrosion treatment of the galvanized steel plate ensures the durability of the joint. The factory spot welding of the steel plate and the reinforcing steel (prefabrication rate ≥95%) only requires grouting and sealing on site, shortening the construction cycle by 30%, which meets the high-efficiency requirements of prefabricated buildings.

[0088] In one specific embodiment, refer to Figure 1 , Figure 9 and Figure 11 The construction process of this utility model embodiment is described in detail below:

[0089] Factory prefabrication: The thin-walled body 1 is pressed using a customized mold, and the groove 3 and through hole 4 are integrally formed; the thin-walled body 1 is fixed in the prefabricated base plate mold, and after the steel bars are tied, concrete is poured to form a prefabricated bathroom base basin with a reverse curb.

[0090] On-site installation: Hoist the precast base to the design position, adjust the level and temporarily fix it; pour cast-in-place concrete into the groove 3 and through hole 4 on the outside of the profiled thin-walled body 1, so that the concrete fills the groove 3 to form a tenon and passes through the through hole 4 to form a concrete bolt, and connects with the surrounding cast-in-place structure (such as shear wall, floor slab) to form an integral whole.

[0091] This invention achieves a firm connection between the precast retaining wall and the cast-in-place concrete by optimizing the concave-convex structure of the profiled thin wall, while improving the waterproof performance and construction efficiency of the bathroom. It is suitable for widespread application in prefabricated houses, hotels and other buildings.

[0092] 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.

[0093] 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 pressed thin-walled embedded inverted retaining structure, characterized in that, The material includes a profiled thin-walled body having at least two adjacent sides, each side having a concave-convex structure for mechanically engaging with cast-in-place concrete, the concave-convex structure including grooves and through holes spaced apart along the length of the profiled thin-walled body.

2. The pressed thin-walled embedded inverted retaining structure according to claim 1, characterized in that, The opening of the groove faces the outside of the pressed thin-walled body, and the depth direction of the groove is perpendicular to the side of the pressed thin-walled body.

3. The pressed thin-walled embedded inverted retaining structure according to claim 2, characterized in that, The groove can be trapezoidal or dovetail-shaped.

4. The pressed thin-walled embedded inverted retaining structure according to claim 1, characterized in that, The through holes are arranged in an array along the length and width directions of the pressed thin-walled body, respectively.

5. The pressed thin-walled embedded inverted retaining structure according to claim 4, characterized in that, The through hole includes one or more of the following: large and small holes, round holes, embossed holes, large fish scale holes, small fish scale holes, willow leaf holes, and fish eye holes.

6. The pressed thin-walled embedded inverted retaining structure according to claim 5, characterized in that, The bottom wall of the groove is also provided with the through hole.

7. The pressed thin-walled embedded inverted retaining structure according to claim 1, characterized in that, The profiled thin-walled body is also provided with vertical reinforcing bars, one end of which protrudes from the top wall of the profiled thin-walled body and the protruding end of the vertical reinforcing bar is inclined toward the side.

8. A fully prefabricated bathroom sink structure, characterized in that, The structure includes the profiled thin-walled embedded inverted curb structure as described in any one of claims 1-7, and also includes a precast base plate, wherein the profiled thin-walled embedded inverted curb structure is arranged in a ring around the edge of the precast base plate and is integrally cast with the precast base plate.

9. The fully prefabricated bathroom basin structure according to claim 8, characterized in that, The precast base slab is also provided with a number of intersecting transverse and longitudinal reinforcing bars, one end of which protrudes from the side wall of the precast base slab.

10. The fully prefabricated bathroom basin structure according to claim 8, characterized in that, The precast base plate is also provided with a plain inverted retaining wall, which is located inside the profiled thin-walled embedded inverted retaining wall structure.

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