Preparation of outer wall and cast-in-place beam joint leakage-proof structure

Abstract

The utility model discloses a prefabricated outer wall and cast-in-place beam joint seepage prevention structure, including cast-in-place beam and prefabricated wallboard, cast-in-place beam and prefabricated wallboard transverse joint adopts rabbet connection. The utility model discloses two waterproof structural design of rabbet and pressure tank two -layer waterproof structure setting of cast-in-place beam and prefabricated wallboard structure, combine half grouting sleeve connection technology, form two waterproof barriers, realize the accurate installation of outer wall board, and the pressure tank setting waterproof paint, glass fiber gridding cloth, anti -crack mortar plaster, waterproof putty way and outer wall coating of outer root of outer wall board, can reach the process effect of prefabricated wallboard and cast-in-place beam joint seepage prevention of assembly type building and outer wall plastering -free, through the half grouting sleeve setting, through embedding in prefabricated wallboard, from grouting mouth carries out the grouting, and after grouting material fills the pressure tank between cast-in-place beam and prefabricated wallboard, grouting material will continue to fill half grouting sleeve, until grouting material spills from the grouting outlet.

Description

Technical Field

[0001] This utility model relates to the field of assembly construction technology, specifically to a leak-proof structure for the joint between prefabricated exterior walls and cast-in-place beams. Background Technology

[0002] Driven by the "dual carbon" goals, prefabricated buildings have become a direction for the transformation of the construction industry due to their low-carbon advantages of industrialized production. However, compared with traditional cast-in-place structures, the number of joints between prefabricated components and cast-in-place parts has increased dramatically. Affected by factors such as thermal expansion and contraction of materials, construction errors, and natural settlement, problems such as leakage and cracking are prone to occur at the joints, which directly affect the durability and safety of the building.

[0003] Traditional organic sealants suffer from drawbacks such as insufficient bond strength, poor weather resistance, and demanding application conditions, making it difficult to meet the needs of a building throughout its entire lifecycle. This is especially true for the connection between exterior wall panels and beams, which not only affects the planar relationship between floor construction joints but also requires ensuring the reliability and waterproofing performance of the joints. Utility Model Content

[0004] The purpose of this utility model is to provide a leak-proof structure for the joint between prefabricated exterior walls and cast-in-place beams, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof structure for the joint between a precast exterior wall and a cast-in-place beam, comprising a cast-in-place beam and a precast wall panel, wherein the transverse joint between the cast-in-place beam and the precast wall panel is connected by a tongue and groove joint.

[0006] The tongue and groove form a stepped shape with a lower outer edge and a higher inner edge. A PE rod is embedded in the tongue and groove on the inner side of the precast wall panel. One end of the tongue and groove is sealed with wood mortar. A pressure groove is provided at the root of the outer side of the cast-in-place beam. The pressure groove has a height of 150mm and a depth of 10mm.

[0007] In the above technical solution, the structure of the cast-in-place beam and precast wall panel is designed with two layers of waterproofing structure, namely tongue and groove, combined with semi-grouting sleeve connection technology, to form two waterproof barriers.

[0008] As a further preferred embodiment of this technical solution, the cast-in-place beam is provided with grouting end steel bars arranged on the inner side, the precast wall panel is provided with threaded end steel bars arranged on the inner side, and a semi-grouting sleeve is installed between the grouting end steel bars and the threaded end steel bars.

[0009] As a further preferred embodiment of this technical solution, each of the semi-grouting sleeves is provided with a grouting port at the bottom and a grout outlet at the top, and both the grouting port and the grout outlet extend outward from the outside of the precast wall panel for grouting.

[0010] As a further preferred embodiment of this technical solution, the inner wall of the semi-grouting sleeve is provided with spiral grooves to guide the grouting material to fill evenly from bottom to top.

[0011] As a further preferred embodiment of this technical solution, a positioning ring is fixedly connected to the inner wall of the upper part of the semi-grouting sleeve for positioning the inner end of the reinforcing bar at the grouting end.

[0012] In the above technical solution, the positioning ring can position the reinforcing bars at the grouting end to prevent displacement from affecting the construction quality.

[0013] As a further preferred embodiment of this technical solution, the groove is sequentially coated with waterproof coating, fiberglass mesh, 8mm crack-resistant mortar plaster, waterproof putty, and exterior wall coating.

[0014] In the above technical solution, the groove at the base of the outer side of the exterior wall panel is filled with waterproof coating, fiberglass mesh, crack-resistant mortar plaster, waterproof putty, and exterior wall paint, which can achieve the process effect of preventing leakage at the joint between prefabricated wall panels and cast-in-place beams in prefabricated buildings and eliminating the need for plastering the exterior walls.

[0015] As a further preferred embodiment of this technical solution, the tongue and groove connection includes a protruding portion on the top of the cast-in-place beam and a recessed portion on the bottom of the precast wall panel, wherein the depth difference between the protruding portion and the recessed portion is not less than 50mm.

[0016] This utility model provides a leak-proof structure for the joint between precast exterior walls and cast-in-place beams, which has the following beneficial effects:

[0017] (1) This utility model uses a two-layer waterproof structure design of tongue and groove and pressure groove for the structure of cast-in-place beams and precast wall panels, combined with semi-grouting sleeve connection technology, to form two waterproof barriers, so as to achieve precise installation of the exterior wall panels. The pressure groove at the root of the outer side of the exterior wall panel is equipped with waterproof coating, fiberglass mesh, crack-resistant mortar plaster, waterproof putty and exterior wall coating, which can achieve the process effect of preventing leakage at the joint between precast wall panels and cast-in-place beams in prefabricated buildings and eliminating the need for plastering the exterior wall.

[0018] (2) This utility model uses a semi-grouting sleeve that is pre-embedded in the precast wall panel. Grouting is performed from the grouting port. After the grouting material fills the groove between the cast-in-place beam and the precast wall panel, the grouting material will continue to fill the semi-grouting sleeve until the grouting material overflows from the outlet. A spiral groove is set on the inner wall of the semi-grouting sleeve to guide the grouting material to fill evenly from bottom to top. The positioning ring can position the reinforcing steel at the grouting end to prevent displacement from affecting the construction quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2This is a schematic diagram of the tongue and groove and the pressure groove of this utility model;

[0021] Figure 3 This is a schematic diagram of the bottom structure of the prefabricated wall panel of this utility model;

[0022] Figure 4 This is a cross-sectional view of the semi-grouting sleeve of this utility model;

[0023] Figure 5 This is an enlarged view of Figure A of this utility model;

[0024] In the diagram: 1. Cast-in-place beam; 2. Precast wall panel; 6. PE rod; 7. Timber mortar sealing; 8. Groove; 9. Grouting end reinforcement; 10. Threaded end reinforcement; 11. Semi-grouting sleeve; 111. Grouting port; 112. Grout outlet; 113. Spiral groove; 114. Positioning ring. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0026] This utility model provides a technical solution: such as Figure 1 As shown in this embodiment, a leak-proof structure for the joint between a precast exterior wall and a cast-in-place beam includes a cast-in-place beam 1 and a precast wall panel 2. The transverse joint between the cast-in-place beam 1 and the precast wall panel 2 is connected by a tongue and groove joint.

[0027] like Figure 1-3 As shown, the tongue and groove joint forms a stepped shape with a lower outer edge and a higher inner edge. The tongue and groove connection includes a protruding part at the top of the cast-in-place beam 1 and a recessed part at the bottom of the precast wall panel 2. The depth difference between the protruding part and the recessed part is not less than 50mm. A PE rod 6 is embedded in the tongue and groove joint on the inner side of the precast wall panel 2. A wooden mortar sealing 7 is provided at one end of the tongue and groove joint. A pressure groove 8 is provided at the root of the outer side of the cast-in-place beam 1. The pressure groove 8 has a height of 150mm and a depth of 10mm. The pressure groove 8 is coated with waterproof paint, fiberglass mesh, and 8mm crack-resistant mortar plaster in sequence. The structure of the precast beam 1 and precast wall panel 2 is designed with a two-layer waterproof structure of tongue and groove and pressure groove 8. Combined with the semi-grouting sleeve 11 connection technology, two waterproof barriers are formed to achieve precise installation of the exterior wall panel. The pressure groove 8 at the root of the outer side of the exterior wall panel is filled with waterproof coating, fiberglass mesh, crack-resistant mortar plaster, waterproof putty and exterior wall coating. It can achieve the process effect of preventing leakage at the joint between the precast wall panel 2 and the cast-in-place beam 1 and eliminating the need for plastering the exterior wall. The waterproof coating is polyurethane waterproof coating.

[0028] like Figure 4 and Figure 5As shown, grouting end steel bars 9 are arranged on the inner side of the cast-in-place beam 1, and threaded end steel bars 10 are arranged on the inner side of the precast wall panel 2. A semi-grouting sleeve 11 is installed between the grouting end steel bars 9 and the threaded end steel bars 10. A grouting port 111 is provided below each semi-grouting sleeve 11, and a grout outlet 112 is provided above each semi-grouting sleeve 11. Both the grouting port 111 and the grout outlet 112 extend beyond the outer side of the precast wall panel 2 for grouting. A spiral groove 113 is formed on the inner wall of each semi-grouting sleeve 11 to guide the grout material to fill evenly from bottom to top. The upper inner wall of each semi-grouting sleeve 11 is fixed... A positioning ring 114 is fixedly connected to position the inner end of the reinforcing bar 9 at the grouting end. Through the semi-grouting sleeve 11, which is pre-embedded in the precast wall panel 2, grout is injected from the grouting port 111. After the grout fills the groove 8 between the cast-in-place beam 1 and the precast wall panel 2, the grout will continue to fill the semi-grouting sleeve 11 until the grout overflows from the outlet 112. In addition, a spiral groove 113 is provided on the inner wall of the semi-grouting sleeve 11 to guide the grout to fill evenly from bottom to top. The positioning ring 114 can position the reinforcing bar at the grouting end to prevent displacement from affecting the construction quality.

[0029] This utility model provides a leak-proof structure for the joint between a precast exterior wall and a cast-in-place beam. The specific working principle is as follows: The precast wall panel 2 is hoisted, so that the cast-in-place beam 1 and the precast wall panel 2 are positioned by a tongue and groove joint. After the PE rod 6 is embedded in the inside, it is temporarily fixed by sealing with wooden mortar 7. Flowable grout is injected through the grouting port 111. The semi-grouting sleeve 11 is set and is embedded in the precast wall panel 2. Grout is injected from the grouting port 111. After the grout fills the pressure groove 8 between the cast-in-place beam 1 and the precast wall panel 2, the grout will continue to fill the semi-grouting sleeve 11 until the grout overflows from the grout outlet 112 and overflows from the upper grout outlet 112. After the grout solidifies, the wooden mortar is removed, the tongue and groove joint is sealed with mortar, and a structural layer of waterproof coating, fiberglass mesh, crack-resistant mortar plaster, waterproof putty and exterior wall coating is added at the pressure groove 8.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leak-proof structure for the joint between a precast exterior wall and a cast-in-place beam, comprising a cast-in-place beam (1) and a precast wall panel (2), characterized in that: The transverse joints between the cast-in-place beam (1) and the precast wall panel (2) are connected by tongue and groove joints; The tongue and groove form a stepped shape with a lower outer edge and a higher inner edge. A PE rod (6) is embedded in the tongue and groove on the inner side of the precast wall panel (2). A wooden mortar seal (7) is provided at one end of the tongue and groove. A pressure groove (8) is provided at the root of the outer side of the cast-in-place beam (1). The pressure groove (8) has a height of 150mm and a depth of 10mm.

2. The anti-leakage structure for the joint between precast exterior walls and cast-in-place beams according to claim 1, characterized in that: The cast-in-place beam (1) is provided with grouting end steel bars (9) arranged on the inner side, and the precast wall panel (2) is provided with threaded end steel bars (10) arranged on the inner side. A semi-grouting sleeve (11) is installed between the grouting end steel bars (9) and the threaded end steel bars (10).

3. The anti-leakage structure for the joint between precast exterior wall and cast-in-place beam according to claim 2, characterized in that: Each of the semi-grouting sleeves (11) is provided with a grouting port (111) at the bottom and a grout outlet (112) at the top. Both the grouting port (111) and the grout outlet (112) extend outward from the outside of the precast wall panel (2) for grouting.

4. The anti-leakage structure for the joint between precast exterior wall and cast-in-place beam according to claim 2, characterized in that: The inner wall of the semi-grouting sleeve (11) is provided with spiral grooves (113) to guide the grouting material to fill evenly from bottom to top.

5. A leak-proof structure for the joint between a precast exterior wall and a cast-in-place beam according to claim 2, characterized in that: The upper inner wall of each of the semi-grouting sleeves (11) is fixedly connected with a positioning ring (114) for positioning the inner end of the grouting end steel bar (9).

6. The anti-leakage structure for the joint between precast exterior wall and cast-in-place beam according to claim 1, characterized in that: The groove (8) is sequentially coated with waterproof paint, fiberglass mesh, 8mm crack-resistant mortar plaster, one coat of waterproof putty, and exterior wall paint.

7. The anti-leakage structure for the joint between precast exterior wall and cast-in-place beam according to claim 1, characterized in that: The tongue and groove connection includes a protruding part on the top of the cast-in-place beam (1) and a recessed part on the bottom of the precast wall panel (2), and the depth difference between the protruding part and the recessed part is not less than 50mm.

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