Prefabricated wallboard spliced horizontal joint drain pipe structure and using method thereof

Abstract

The invention relates to the technical field of prefabricated wallboard joint waterproofing, and discloses a prefabricated wallboard assembly horizontal joint drain pipe structure and a using method thereof.The prefabricated wallboard assembly horizontal joint drain pipe structure comprises a prefabricated wallboard, a connecting mechanism, a rubber drain pipe and a rain baffle, a cavity is formed between an outer wallboard and a waterproof layer of the prefabricated wallboard, and the bottom of the cavity is provided with a drainage slope and communicates with a tongue-and-groove joint; a rubber drain pipe is arranged at the communication part; the rubber drain pipe achieves double preliminary positioning through attraction of a magnetic attraction block and a magnetic attraction strip and clamping of a protruding block and a groove, and the rubber drain pipe is matched with bolt fixing of a semi-split type positioning plate, so that it is guaranteed that installation is accurate and firm. The tongue-and-groove seam is filled with seam filling mortar to be sealed and fixed, the connecting mechanism is filled and spliced through grouting materials, and rain wash backflow is blocked through a rain baffle. A double-waterproof system of external prevention and internal drainage is constructed, the drainage efficiency and the joint sealing performance are improved, the stability of a building structure is guaranteed, the service life is prolonged, and the problems that an existing drain pipe is inaccurate in positioning and prone to displacement, and the joint rainwater leakage risk is high are solved.

Description

Technical Field

[0001] This invention relates to the field of waterproofing technology for precast wall panel joints, and in particular to a drainage pipe structure for horizontal joints in precast wall panel assembly and its usage method. Background Technology

[0002] With the continuous improvement of industrialization and prefabrication in the construction industry, precast wall panels are increasingly widely used in construction projects due to their advantages such as high construction efficiency and controllable quality. However, the horizontal joints of precast wall panels are a weak link in building waterproofing and have long faced a series of problems caused by rainwater infiltration: rainwater can easily penetrate the surface of the exterior wall panel and form seepage water between the outer layer of the wall panel and the waterproof layer. Traditional structures lack a dedicated carrier for collecting and channeling seepage water, resulting in disordered diffusion of seepage water, making it difficult to concentrate and drain. As a result, the seepage water seeps into the interior of the wall through the joint gaps, which not only erodes the concrete wall and corrodes the steel reinforcement, but also damages the thermal insulation performance of the insulation board, seriously affecting the stability and service life of the building structure.

[0003] In existing technologies, drainage pipes are often installed at the horizontal joints of precast wall panels for drainage. However, the installation and splicing structure of drainage pipes have many defects: First, the installation of drainage pipes relies heavily on manual adjustment. Workers need to constantly adjust the position of the drainage pipes to ensure the output of accumulated water. The lack of a reliable positioning structure makes them prone to displacement due to external construction forces and joint filling operations, making it impossible to accurately connect to the water collection area and causing drainage failure. Second, the outside of the joint lacks a rainproof structure, allowing rainwater to directly wash over the joint or backflow and seep in, exacerbating the risk of leakage. Summary of the Invention

[0004] To overcome the above deficiencies, this invention provides a structure and usage method for a drainage pipe at the horizontal joint of a prefabricated wall panel assembly, which enables precise positioning and firm fixation of the drainage pipe, preventing displacement during construction and use; and strengthens external rainwater protection, preventing rainwater from directly scouring or backflowing into the joint.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a drainage pipe structure for horizontal joints of precast wall panels, comprising precast wall panels and a connecting mechanism located between the precast wall panels; the precast wall panel includes a steel reinforcement keel located inside the wall panel, a concrete wall filling between the steel reinforcement keels, a waterproof layer applied to the outside of the concrete wall, and an insulation board fixedly installed on the inside of the concrete wall; an outer wall panel is fixedly installed on the outside of the waterproof layer, a cavity is provided between the outer wall panel and the waterproof layer, and a tongue and groove joint is provided at the bottom of the precast wall panel; a rubber drainage pipe is provided at the connection between the tongue and groove joint and the cavity.

[0006] As a further description of the above technical solution: the rubber drainage pipe includes a pipe body, an interface end disposed at one end of the pipe body, a water outlet end disposed at the other end of the pipe body, and a magnetic block; the magnetic block is fixedly installed on the outside of the interface end, and a protrusion is provided on one side of the magnetic block.

[0007] As a further description of the above technical solution: the rubber drainage pipe also includes a semi-split positioning plate, fixing holes and fixing bolts. The positioning plate is installed on the outside of the pipe body by splicing on both sides. The fixing holes are opened at the four corners of the positioning plate. The fixing bolts pass through the inner cavity of the fixing holes and are fixedly connected to the outer wall panel.

[0008] As a further description of the above technical solution: a magnetic strip is fixedly installed at the bottom of the inner cavity of the cavity by stainless steel screws. The magnetic strip has a groove adapted to the protrusion. The magnetic strip attracts the magnetic block, and the protrusion engages with the groove.

[0009] As a further description of the above technical solution: the connecting mechanism includes connecting ribs, limiting grooves, bolt holes and fastening bolts; the connecting ribs are respectively fixedly connected to the left and right sides of the precast wall panel, the limiting grooves are set between the two connecting ribs, the bolt holes are opened on the surface of the connecting ribs, and the fastening bolts are fixedly installed in the inner cavity of the bolt holes.

[0010] As a further description of the above technical solution: the bottom of the connecting rib is provided with a casting hole, and the top of the connecting rib is provided with an overflow hole, the overflow hole being a concave structure.

[0011] As a further description of the above technical solution: a rain shield is fixedly installed on the outer side of the tongue and groove joint, the rain shield including a first slope, a second slope, and a drip surface disposed between the first slope and the second slope.

[0012] As a further description of the above technical solution: the inside of the tongue and groove joint is filled with grout.

[0013] As a further description of the above technical solution: the bottom of the cavity is provided with a drainage slope towards the interface end.

[0014] A method for using a drainage pipe structure at a horizontal joint of a precast wall panel assembly includes the following steps:

[0015] Step S1: Align the tongue and groove joint at the bottom of the precast wall panel with the connection joint of the floor slab and fix the precast wall panel; insert the interface end of the rubber drain pipe into the connection between the tongue and groove joint and the cavity, the magnetic block and the magnetic strip attract each other, and the protrusion is inserted into the groove of the magnetic strip to achieve initial positioning;

[0016] Step S2: Pour grout into the tongue and groove joint to seal the joint and fix the rubber drain pipe; Splice the semi-split positioning plate from both sides of the pipe body, align it with the reserved installation holes on the outer wall panel, and lock it with fixing bolts and elastic washers to complete the final fixing of the rubber drain pipe.

[0017] Step S3: Align adjacent precast wall panels and pre-tighten them with bolts to ensure a smooth joint. Inject fluid grout into the pouring hole and observe the overflow hole. When grout continuously overflows from the overflow hole, stop grouting and plug the pouring hole and overflow hole with rubber plugs. After the grout has initially set for 4-6 hours, tighten the bolts and use elastic washers to compress and compensate for grout shrinkage. After the grout has completely solidified, apply sealant to the outside of the pouring hole and overflow hole.

[0018] Step S4: Fix the rain shield to the outside of the horizontal joint of the wall panel. When rain falls, the rainwater drips down the first slope and the drip plate. The second slope prevents the rainwater from flowing back into the tongue and groove joint. The water collected in the cavity is discharged outside the building through the rubber drainage pipe.

[0019] The present invention has the following beneficial effects:

[0020] 1. In this invention, the rubber drainage pipe uses magnetic adsorption and a combination of protrusions and grooves for initial positioning. Combined with the bolt fixing of the semi-split positioning plate, this achieves precise installation and secure fixation of the rubber drainage pipe, effectively avoiding displacement issues caused by external forces during construction, caulking operations, and use. This ensures that the drainage pipe interface always precisely connects to the cavity water collection area. At the same time, the drainage slope set at the bottom of the cavity towards the interface accelerates the flow rate of seepage water, significantly improving drainage efficiency. This prevents the risk of seepage water accumulating at the joint and seeping into the wall from the source, ensuring the dryness and structural stability of the wall panel insulation layer and the concrete wall.

[0021] 2. In this invention, the mortar filling the tongue and groove joint not only achieves the sealing and protection of the joint, but also forms a wrapping and auxiliary fixation for the rubber drainage tube. Combined with the rainproof plate, a dual waterproof system of internal sealing and external protection is constructed, which effectively prevents external rainwater from directly washing away or flowing back into the joint. Attached Figure Description

[0022] Figure 1 A schematic diagram of the overall structure of a drainage pipe for a horizontal joint of a prefabricated wall panel assembly;

[0023] Figure 2 This is a cross-sectional schematic diagram of a precast wall panel;

[0024] Figure 3 This is a schematic diagram of the connecting mechanism;

[0025] Figure 4This is a schematic diagram of the structure of a rubber hydrophobic tube;

[0026] Figure 5 This is a schematic diagram of the structure of the protrusion on the magnetic block;

[0027] Figure 6 This is a cross-sectional view of the rain shield.

[0028] Figure 7 This is a planar schematic diagram of the cavity and the interface end.

[0029] Legend:

[0030] 1. Precast wall panel; 101. Reinforcing steel keel; 102. Concrete wall; 103. Waterproof layer; 104. Insulation board; 105. Fiberglass mesh; 106. Plastering mortar; 107. Exterior wall panel; 108. Cavity; 2. Rainproof panel; 201. First slope; 202. Second slope; 203. Drip surface; 3. Connecting mechanism; 301. Connecting rib; 302. Limiting groove; 303. Bolt hole; 304. Fastening bolt; 305. Pouring hole; 306. Overflow hole; 4. Tongue and groove joint; 5. Rubber drainage pipe; 501. Pipe body; 502. Interface end; 503. Water outlet end; 504. Magnetic block; 505. Positioning plate; 506. Fixing hole; 507. Fixing bolt; 508. Protrusion; 6. Joint mortar; 7. Magnetic strip. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example

[0033] Reference Figure 1-7 The present invention provides an embodiment of a prefabricated wall panel assembly horizontal joint drainage pipe structure, comprising a prefabricated wall panel 1 and a connecting mechanism 3 located between the prefabricated wall panels 1;

[0034] like Figure 2As shown, the precast wall panel 1 is a multi-layer composite load-bearing and thermal insulation integrated structure, with internal steel reinforcement 101. C30 high-strength concrete is filled between the steel reinforcement 101 to ensure structural strength. A high-polymer waterproof membrane is applied to the outside of the concrete wall 102 to form a waterproof layer 103, preventing water penetration into the wall. Rock wool insulation board 104 is fixedly installed on the inside of the concrete wall 102 to achieve thermal insulation. Fiberglass mesh 105 is fixedly installed on the side of the insulation board 104 away from the concrete wall 102, and crack-resistant and waterproof plastering mortar 106 is applied to the outside of the fiberglass mesh 105. Fiberglass mesh 105 is used to enhance the crack resistance of the plastering mortar layer and further improve the inner protection effect; an exterior wall panel 107 is fixedly installed on the outside of the waterproof layer 103. The exterior wall panel 107 is a precast concrete decorative panel. A cavity 108 with a width of 50-80mm is set between the exterior wall panel 107 and the waterproof layer 103. The cavity 108 serves as a concentrated water collection area for seepage water; a tongue and groove joint 4 with a depth of 30-50mm is set at the bottom of the precast wall panel 1. The tongue and groove joint 4 is connected to the cavity 108. A rubber drainage pipe 5 is set at the connection to drain the seepage water collected in the cavity 108.

[0035] The tongue and groove joint 4 is filled with polymer waterproof sealant mortar 6, which not only seals the tongue and groove joint 4, but also helps to fix the rubber drainage tube 5 to prevent it from loosening and shifting.

[0036] like Figure 7 As shown, the bottom of the cavity 108 is provided with a drainage slope of 1% to 2% towards the interface end 502 to ensure that the permeable water collected in the cavity 108 can quickly flow to the interface end 502 of the rubber drainage pipe 5, thereby improving drainage efficiency.

[0037] like Figure 3 As shown, the connecting mechanism 3 is used to achieve a firm splicing of adjacent precast wall panels 1, including connecting ribs 301, limiting grooves 302, bolt holes 303, and fastening bolts 304. The connecting ribs 301 are made of Q235B steel plates and are welded and fixed to the left and right sides of the precast wall panels 1 respectively. A limiting groove 302 is provided between two opposing connecting ribs 301 to play a role in quick positioning and limiting the splicing. Bolt holes 303 are opened on the surface of the connecting ribs 301, and the fastening bolts 304 are made of high-strength bolts. A bolt is inserted into the inner cavity of the bolt hole 303 to achieve mechanical fixation of adjacent precast wall panels 1; the bottom of the connecting rib plate 301 is provided with a pouring hole 305 with a diameter of 20-30mm, and the top is provided with an overflow hole 306 with a diameter of 15-20mm. The overflow hole 306 has a concave structure with a concave depth of 5-8mm; the pouring hole 305 is used to inject high-strength grout, and the overflow hole 306 serves as the basis for judging whether the grout is fully filled. The concave structure facilitates subsequent filling and compaction of sealant.

[0038] like Figure 2 , Figure 4 and Figure 5 As shown, the rubber drainage pipe 5 includes a pipe body 501, an interface end 502, a water outlet end 503, and a magnetic block 504. The interface end 502 and the water outlet end 503 are respectively located at both ends of the pipe body 501. The interface end 502 has a flared structure to facilitate the expansion of the water collection range and extends into the communication between the tongue and groove 4 and the cavity 108. The water outlet end 503 extends to the outside of the building. The magnetic block 504 is fixedly installed on the outside of the interface end 502. A protrusion 508 is provided on one side of the magnetic block 504 for auxiliary positioning. A strong magnetic strip 7 is fixedly installed at the bottom of the inner cavity of the cavity 108 by stainless steel screws. The magnetic strip 7 has a groove that matches the protrusion 508. The magnetic strip 7 attracts the magnetic block 504, and at the same time, the protrusion 508 engages with the groove to form a dual preliminary positioning structure of magnetic attraction and mechanical engagement.

[0039] The rubber drain pipe 5 also includes a semi-split positioning plate 505, fixing holes 506, and fixing bolts 507. The positioning plate 505 is made of galvanized steel plate and is installed on the outside of the pipe body 501 by splicing on both sides. It does not need to be sleeved from the end, thus avoiding displacement of the rubber drain pipe 5 caused by sleeved from the end. The fixing holes 506 are opened at the four corners of the positioning plate 505. The fixing bolts 507 are stainless steel expansion bolts, which are inserted into the inner cavity of the fixing holes 506 and fixedly connected to the outer wall plate 107. They are locked with elastic washers to achieve the final fixation of the rubber drain pipe 5.

[0040] like Figure 1 and Figure 6 As shown, a rain shield 2 is fixedly installed on the outside of the tongue and groove joint 4. The rain shield 2 is made of aluminum alloy or stainless steel plate and includes a first slope 201, a second slope 202 and a drip surface 203 set between the two. When rainwater drips onto the first slope 201, it slides along the first slope 201 to the drip surface 203 and slides down quickly from the drip surface 203. The second slope 202 effectively blocks the backflow of rainwater on the rain shield 2 and prevents water from entering the tongue and groove joint 4.

[0041] To further illustrate the above embodiments, the present invention also provides a method for using a drainage pipe structure for horizontal joints in prefabricated wall panel assembly. The specific steps for using the present invention are as follows:

[0042] Step S1: Preliminary positioning of precast wall panels and drainage pipes:

[0043] Align the tongue and groove joint 4 at the bottom of the precast wall panel 1 with the connection joint of the floor slab, and fix the precast wall panel 1 with embedded parts or fasteners; insert the interface end 502 of the rubber drain pipe 5 into the connection between the tongue and groove joint 4 and the cavity 108, and use the adsorption force of the magnetic strip 7 and the magnetic block 504 to make the protrusion 508 accurately fit into the groove of the magnetic strip 7, so as to achieve the initial positioning of the rubber drain pipe 5 and ensure that the interface end 502 is aligned with the water collection area of ​​the cavity 108.

[0044] Step S2: Tongue and groove sealing and final fixation of the drainage pipe:

[0045] Filling mortar 6 is poured into the tongue and groove joint 4, filling the inner cavity of the tongue and groove joint 4. While sealing the tongue and groove joint 4, it also wraps and fixes the rubber drain pipe 5. The semi-split positioning plate 505 is spliced ​​from both sides of the pipe body 501, so that the positioning plate 505 is close to the surface of the outer wall panel 107 and aligned with the reserved installation hole of the outer wall panel 107. The fixing bolt 507 is passed through the fixing hole 506 and tightened with the installation hole. The elastic washer is used to lock it, completing the final fixation of the rubber drain pipe 5 and preventing it from shifting during use.

[0046] Step S3, splicing adjacent wall panels and filling with mortar:

[0047] Align adjacent precast wall panels 1 so that the connecting ribs 301 of the two wall panels fit together, and the limiting grooves 302 achieve splicing positioning; insert the fastening bolts 304 into the bolt holes 303 and pre-tighten them, leaving a small gap to ensure that the splicing of the two wall panels is flat and without misalignment; inject fluid grout from the pouring hole 305 at the bottom of the connecting rib 301, and continuously observe the overflow hole 306 at the top. When grout continuously overflows from the overflow hole 306 without air bubbles, it indicates that the gap between the connecting ribs 301 has been fully filled. Stop grouting and plug the pouring hole 305 and the overflow hole 306 with rubber plugs; after the grout has initially set for 4-6 hours, tighten the fastening bolts 304. The compression deformation of the elastic washer compensates for the gap caused by the shrinkage of the grout, ensuring that the wall panel connection is firm; after the grout has completely solidified, apply weather-resistant sealant to the outside of the pouring hole 305 and the overflow hole 306 to complete the splicing of adjacent precast wall panels 1;

[0048] Step S4, Rainproof panel installation and external sealing:

[0049] The rain shield 2 is fixed to the outside of the horizontal joint of the wall panel with expansion bolts to ensure that the rain shield 2 completely covers the tongue and groove joint 4; weather-resistant sealant is applied to the exposed parts of the fixing bolts of the rain shield 2 to further block the rainwater infiltration path; when rain falls, the rainwater drips down the first slope 201 and the drip plate 203, the second slope 202 prevents the rainwater from flowing back into the tongue and groove joint 4, and the water collected in the cavity 108 is discharged outside the building through the rubber drainage pipe 5.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A precast wall panel assembly horizontal joint weep tube construction, characterized by: The system includes a precast wall panel (1) and a connecting mechanism (3) located between the precast wall panels (1); the precast wall panel (1) includes a steel keel (101) located inside the wall panel, a concrete wall (102) filled between the steel keels (101), a waterproof layer (103) applied to the outside of the concrete wall (102), and an insulation board (104) fixedly installed on the inside of the concrete wall (102); an outer wall panel (107) is fixedly installed on the outside of the waterproof layer (103), a cavity (108) is provided between the outer wall panel (107) and the waterproof layer (103), and a tongue and groove joint (4) is provided at the bottom of the precast wall panel (1); a rubber drainage pipe (5) is provided at the connection between the tongue and groove joint (4) and the cavity (108).

2. A prefabricated wall panel assembly horizontal joint weep tube construction according to claim 1, wherein: The rubber drainage pipe (5) includes a pipe body (501), an interface end (502) located at one end of the pipe body (501), a water outlet end (503) located at the other end of the pipe body (501), and a magnetic block (504); the magnetic block (504) is fixedly installed on the outside of the interface end (502), and a protrusion (508) is provided on one side of the magnetic block (504).

3. A prefabricated wall panel assembly horizontal joint weep tube construction according to claim 2, wherein: The rubber drainage pipe (5) also includes a semi-split positioning plate (505), fixing holes (506) and fixing bolts (507). The positioning plate (505) is installed on the outside of the pipe body (501) by splicing on both sides. The fixing holes (506) are opened at the four corners of the positioning plate (505). The fixing bolts (507) pass through the inner cavity of the fixing holes (506) and are fixedly connected to the outer wall panel (107).

4. A precast wall panel assembly horizontal joint weep tube construction according to claim 2 wherein: A magnetic strip (7) is fixedly installed at the bottom of the cavity (108) by stainless steel screws. The magnetic strip (7) has a groove that matches the protrusion (508). The magnetic strip (7) attracts the magnetic block (504), and the protrusion (508) engages with the groove.

5. A prefabricated wall panel assembly horizontal joint weep tube construction according to claim 1, wherein: The connecting mechanism (3) includes a connecting rib (301), a limiting groove (302), a bolt hole (303), and a fastening bolt (304); the connecting rib (301) is fixedly connected to the left and right sides of the precast wall panel (1), the limiting groove (302) is set between the two connecting ribs (301), the bolt hole (303) is opened on the surface of the connecting rib (301), and the fastening bolt (304) is fixedly installed in the inner cavity of the bolt hole (303).

6. A precast wall panel abutment horizontal joint weep tube construction according to claim 5 wherein: The bottom of the connecting rib (301) is provided with a casting hole (305), and the top of the connecting rib (301) is provided with an overflow hole (306), which is a concave structure.

7. A prefabricated wall panel assembly horizontal joint weep tube construction according to claim 1, wherein: A rain shield (2) is fixedly installed on the outside of the tongue and groove joint (4). The rain shield (2) includes a first slope (201), a second slope (202), and a drip surface (203) disposed between the first slope (201) and the second slope (202).

8. A prefabricated wall panel assembly horizontal joint weep tube construction according to claim 1, wherein: The tongue and groove joint (4) is filled with grout (6).

9. A prefabricated wall panel assembly horizontal joint weep tube construction according to claim 1, wherein: The bottom of the cavity (108) is provided with a drainage slope towards the interface end (502).

10. A method of using a prefabricated wall panel assembly horizontal joint weep tube construction, characterized by: Includes the following steps: Step S1: Align the tongue and groove joint (4) at the bottom of the precast wall panel (1) with the floor slab connection joint and fix the precast wall panel (1); insert the interface end (502) of the rubber drain pipe (5) into the connection between the tongue and groove joint (4) and the cavity (108), the magnetic block (504) attracts the magnetic strip (7), and the protrusion (508) is inserted into the groove of the magnetic strip (7) to achieve preliminary positioning; Step S2: Pour grout (6) into the tongue and groove joint (4) to seal the tongue and groove joint (4) and fix the rubber drain pipe (5); Splice the semi-split positioning plate (505) from both sides of the pipe body (501), align it with the reserved installation hole of the outer wall panel (107), and lock it with fixing bolts (507) and elastic washers to complete the final fixing of the rubber drain pipe (5); Step S3: Align the adjacent precast wall panels (1) and pre-tighten them with fastening bolts (304) to ensure that the two wall panels are spliced ​​flat; inject fluid grout into the pouring hole (305) and observe the overflow hole (306). When grout continuously overflows from the overflow hole (306), stop grouting and plug the pouring hole (305) and the overflow hole (306) with rubber plugs; after the grout has initially set for 4-6 hours, tighten the fastening bolts (304) and compress the grout shrinkage by using elastic washers; after the grout has completely solidified, apply sealant to the outside of the pouring hole (305) and the overflow hole (306); Step S4: Fix the rain shield (2) to the outside of the horizontal joint of the wall panel. When rain falls, the rainwater drips down the first slope (201) and the drip plate (203). The second slope (202) prevents the rainwater from flowing back into the tongue and groove joint (4), while the water collected in the cavity (108) is discharged outside the building through the rubber drain pipe (5).

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