Assembled synthetic building interface structure and interface leak prevention treatment method

Abstract

The present invention discloses an assembled synthetic building interface structure and an interface leak prevention treatment method. The interface structure is located at the joint (2) between two adjacent prefabricated building units (1); several vertical concave holes are provided at both ends and in the middle of the joint (2), and cement grouting is poured into the joint (2) and the vertical concave holes; the maximum dimensions of the vertical concave holes in the vertical and horizontal directions parallel to the joint (2) are 40 to 100 millimeters. The assembled synthetic building interface structure and the interface leak prevention treatment method of the present invention have a simple structure, fast construction, and small future maintenance workload, and are suitable for leak prevention treatment at the interfaces between adjacent prefabricated building units of quickly assembled synthetic buildings.

Description

Technical Field

[0001] The present invention relates to a building structure and a treatment method thereof, and particularly to an improvement of an interface structure between assembled synthetic building units and a leak prevention treatment method at the interface. Background Art

[0002] In order to avoid the problems of long construction period, difficult quality unification and large interference to the surrounding area in traditional cast-in-place concrete buildings, in the prior art, assembled synthetic buildings are gradually adopted in construction projects, that is, precast building units made of reinforced concrete structures prefabricated in factories, such as precast kitchens, precast bathrooms, precast bedrooms, etc. These precast building units are assembled together at the construction site, which can greatly reduce the on-site construction workload, shorten the construction time, reduce the labor, and can greatly reduce the interference to the surrounding residents.

[0003] In existing assembled synthetic buildings, as Figure 1 shown, the interfaces between adjacent precast building units adopt the following 5 leak prevention structures from inside to outside: 1. A moisture-proof layer 91 is provided on one side of the interface between two adjacent precast building units to prevent moisture from entering the precast building unit during long-term use; 2. A PVC sleeve 92 is sandwiched between adjacent moisture-proof layers; 3. A polyurethane foam 93 with a support rod is provided, which is a self-expanding polyurethane foam sealant used for filling, sealing and insulating to form a durable, air-resistant and waterproof bond with the concrete base; 4. A cement mortar section 94 is provided in the interface gap, using hydraulic cement as an additional water ingress defense line; 5. A fireproof joint sealant 95 with a support rod is provided to meet the fire compartment requirements.

[0004] However, the existing interface structure and treatment method not only have more processes, longer treatment time, but also have a large future maintenance workload. Summary of the Invention

[0005] Aiming at the deficiencies of the existing ones, the present invention provides an assembled synthetic building interface structure with simple processes, fast construction and very small future maintenance workload, as well as a leak prevention treatment method at the interface.

[0006] The present invention adopts the following technical solution: An assembled synthetic building interface structure is located at the joint between two adjacent precast building units;

[0007] A number of vertical concave holes are provided at both ends and in the middle of the joint, and cement grouting is poured into the joint and the vertical concave holes; the size of the vertical concave holes in the horizontal direction perpendicular to the joint and the size of the vertical concave holes in the horizontal direction parallel to the joint are 40 to 100 millimeters.

[0008] The horizontal cross-section of the vertical concave holes at both ends of the joint is circular, with a diameter of 80 to 90 mm.

[0009] The horizontal cross-section of the vertical concave hole in the middle of the joint is circular, with a diameter of 45 to 55 mm.

[0010] A foam padding bar and sealant are also provided outside the vertical concave holes at the ends of the joint.

[0011] The vertical concave holes penetrate the entire height direction of the prefabricated building unit, and the distance between adjacent vertical concave holes is 500 to 700 mm.

[0012] The weight ratio of the cement grout in the vertical concave holes at both ends of the joint is 10 kg of cement ∶ 4 - 4.3 liters of water; the weight ratio of the cement grout in the joint between the vertical concave holes at both ends and in the vertical concave hole in the middle is 10 kg of cement ∶ 3.5 - 4 liters of water ∶ 0.05 liters of waterproof admixture ∶ 0.15 liters of binder.

[0013] The method for leak prevention treatment of the interface of the assembled composite building of the present invention includes the following steps:

[0014] Step A: A number of vertical recesses are provided on the side walls of two adjacent prefabricated building units so that a number of vertical concave holes are formed at both ends and in the middle of the joint between the two adjacent prefabricated building units;

[0015] Step B: Cement grout is poured into the vertical concave holes at both ends of the joint;

[0016] Step C: Cement grout is poured into the vertical concave hole in the middle of the joint so that the vertical concave hole in the middle and the joint are filled with cement grout.

[0017] The leak prevention treatment method of the interface of the present invention further includes Step D: A foam padding bar and sealant are provided outside the vertical concave holes at the ends of the joint.

[0018] In Step B, a UPVC conduit is used to guide a plastic bag into the vertical concave hole at the end of the joint, and the cement grout is introduced into the plastic bag from top to bottom until it is full, and then the UPVC conduit is removed.

[0019] In Step C, when the cement grout in the vertical concave holes at both ends of the joint in Step B reaches the initial setting, Step C is started. In this step, a UPVC conduit is inserted into the vertical concave hole in the middle of the joint and grouting is carried out from the bottom.

[0020] Compared with the prior art, the assembled synthetic building interface structure and its leak-proof treatment method of the present invention are to set a number of vertical concave holes with different diameters at both ends and the middle of the joint, and pouring cement grout into the vertical concave holes and the joint can achieve a satisfactory leak-proof and moisture-proof effect, which can greatly reduce the treatment process and treatment time, and can completely seal the interface from the workbench during the building construction period without considering future maintenance, which is very labor-saving and cost-saving for maintenance, and can reduce a large amount of exterior wall works after the superstructure construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a horizontal sectional view of the prior assembled synthetic building interface structure;

[0022] Figure 2 is a horizontal sectional view of the assembled synthetic building interface structure of the present invention;

[0023] Figure 3 is a schematic diagram of the leak-proof treatment method for the interface of the assembled synthetic building of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The embodiments of the present invention will be further described in detail below with reference to the drawings.

[0025] As Figure 2 shown, the assembled synthetic building interface structure of the present invention is located at the joint 2 between two adjacent prefabricated building units 1. A number of vertical concave holes are provided at both ends and the middle of the joint 2, and cement grout is poured into the joint 2 and the vertical concave holes. These vertical concave holes can be that a number of vertical concave positions are preset on the outer side wall of the adjacent side of the prefabricated building unit 1, and the vertical concave holes will be formed after the two adjacent prefabricated building units 1 are spliced on the construction site.

[0026] Among them, the dimension of the vertical concave hole in the horizontal direction perpendicular to the joint 2 and the dimension of the vertical concave hole in the horizontal direction parallel to the joint 2 are 40 to 100 mm and greater than the width of the joint 2. The width of the joint 2 is usually 10 - 20 mm, and in this embodiment, it is taken as 15 mm. The vertical concave holes 5 at both ends of the joint 2 are larger than the vertical concave holes 6 in the middle. The horizontal cross-section of these vertical concave holes can be circular, elliptical or quadrilateral, etc., and there is no limitation on the shape. In this embodiment, the horizontal cross-section of the vertical concave holes 5 at both ends of the joint 2 is circular, and its diameter is 85 mm; the horizontal cross-section of the vertical concave holes 6 in the middle of the joint 2 is also circular, and its diameter is 50 mm. Preferably, these vertical concave holes penetrate the entire height direction of the prefabricated building unit 1, and the distance between adjacent vertical concave holes is 500 to 700 mm. In this embodiment, the center distance between adjacent vertical concave holes is 615 mm. Of course, this distance and the number of vertical concave holes in the middle can be appropriately adjusted according to the length of the splicing surface of the prefabricated building unit 1.

[0027] In addition, a foam padding rod 3 with a diameter of 20 mm and a sealant 4 are provided outside the vertical recess 5 at the end of the joint 2. In this embodiment, the sealant 4 is a fireproof sealant to meet the requirements of fire compartments.

[0028] In this embodiment, the weight ratio of the cement grout in the vertical recesses 5 at both ends of the joint 2 is 10 kg of cement : 4 - 4.3 L of water. For the joint 2 between the vertical recesses 5 at both ends and the vertical recess 6 in the middle, waterproof cement grout is used to further enhance the waterproof and moisture-proof effect, and its weight ratio is 10 kg of cement : 3.5 - 4 L of water : 0.05 L of waterproof admixture : 0.15 L of binder. Among them, the waterproof admixture can be Conmix W1 brand waterproof admixture or equivalent, and the binder can be Boncrete SBR brand adhesive or equivalent.

[0029] As Figure 2 and Figure 3 shown, the method for leak prevention treatment of the interface of the assembled composite building according to the present invention based on the above interface structure includes the following steps:

[0030] Step A: Several vertical recesses are pre-set on the outer wall of the precast building unit 1 so that several vertical recesses are formed at both ends and in the middle of the joint 2 between two adjacent precast building units 1.

[0031] Step B: Cement grout is poured into the vertical recesses 5 at both ends of the joint 2.

[0032] Step C: Cement grout is poured into the vertical recess 6 in the middle of the joint 2 so that the vertical recess 6 in the middle and the joint 2 are filled with cement grout.

[0033] Step D: A foam padding rod 3 and a fireproof sealant 4 are provided outside the vertical recess 5 at the end of the joint 2.

[0034] Taking the full length of the joint 2 of a precast building unit 1 with a height of 2.8 meters as an example, the materials and tools / equipment used in the above steps are described below.

[0035] The materials used in the above steps are as follows:

[0036] a. Plastic bags with a thickness of 0.12 mm (diameter 75 mm);

[0037] b. Cement grout at the end of the joint (in a plastic bag), with a weight ratio of 10 kg of cement : 4 - 4.3 L of water;

[0038] c. Seam-sealing waterproof cement grout, with a weight ratio of 10 kg of cement : 3.85 L of water : 0.05 L of waterproof admixture : 0.15 L of binder;

[0039] d, foam cushion rod (support rod);

[0040] e, fireproof sealant.

[0041] The tools / devices used in the above steps are as follows:

[0042] a, a UPVC conduit with a diameter of 50 mm and a length of 3 m, used to guide the plastic bag into the vertical concave hole at the end of the joint;

[0043] b, a UPVC conduit with a diameter of 32 mm and a length of 1 m, with a guide cone for pouring cement grout into the vertical concave hole and the gap in the middle of the joint. Alternatively, a grouting machine with a guide pipe with a diameter of 25 mm can be used;

[0044] c, a stirring rammer with a diameter of 20 mm, to reduce air bubbles in the joint.

[0045] In the said step B, a UPVC conduit 71 with a diameter of 50 mm is used to guide a plastic bag 8 with a thickness of 0.12 mm into the vertical concave hole 5 at the end of the joint 2, and cement grout is introduced into the plastic bag 8 from top to bottom until it is full, then the UPVC conduit 71 is removed. The initial setting time of the cement grout is about 30 minutes. Before the cement grout in the plastic bag 8 sets, the cement grout material will cause the plastic bag 8 to expand slightly due to thermal expansion, so that the plastic bag 8 is in close contact with the vertical concave hole 5 at the end. This step B is used to seal both ends of the joint 2 to prevent grout leakage during the grouting of the middle part of the joint 2 in step C.

[0046] When the cement grout in the vertical concave hole 5 at the end in the above step B reaches the initial setting, start the said step C. In this step C, a UPVC conduit 72 with a diameter of 32 mm is inserted into the vertical concave hole 6 in the middle of the joint 2 and grouting is carried out from the bottom. Under the action of gravity, the vertical concave hole 6 in the middle and the adjacent joint 2 connected to it are filled with waterproof cement grout. During this period, a rammer with a diameter of 20 mm is used to stir the grout regularly to reduce air bubbles entering the mixture during pouring. And the complete grouting of the joint 2 and the vertical concave hole should be completed before the concrete slab is poured.

[0047] The interface leak-proof treatment method of the present invention can achieve satisfactory water tightness through tests, which can not only solve future maintenance problems, but also reduce a large amount of exterior wall work after the superstructure construction.

[0048] The above description is only the preferred embodiment of the present invention, and is not used to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An assembled synthetic building interface structure is located at the joint (2) between two adjacent precast building units (1); it is characterized in that: A number of vertical concave holes are provided at both ends and in the middle of the joint (2), and the joint (2) and the vertical concave holes are filled with cement grout; the size of the vertical concave holes in the horizontal direction perpendicular to the joint (2) and the size of the vertical concave holes in the horizontal direction parallel to the joint (2) are 40 to 100 mm, and the vertical concave holes at both ends of the joint (2) are larger than the vertical concave holes in the middle; The weight ratio of the cement grout in the vertical concave holes at both ends of the joint (2) is 10 kg of cement ∶ 4 - 4.3 liters of water; the weight ratio of the cement grout in the joint (2) between the vertical concave holes at both ends and the vertical concave holes in the middle is 10 kg of cement ∶ 3.5 - 4 liters of water ∶ 0.05 liters of waterproof admixture ∶ 0.15 liters of binder.

2. The assembled synthetic building interface structure according to claim 1, wherein: The horizontal cross-section of the vertical concave holes at both ends of the joint (2) is circular, and its diameter is 80 to 90 mm.

3. The assembled synthetic building interface structure according to claim 2, characterized in that, The horizontal cross-section of the vertical concave holes in the middle of the joint (2) is circular, and its diameter is 45 to 55 mm.

4. The assembled synthetic building interface structure according to claim 1, 2 or 3, characterized in that: A foam gasket rod (3) and a sealant (4) are further provided outside the vertical concave holes at the end of the joint (2).

5. The assembled synthetic building interface structure according to claim 1, 2 or 3, characterized in that: The vertical concave holes penetrate through the entire height direction of the precast building unit (1), and the distance between adjacent vertical concave holes is 500 to 700 mm.

6. A method for leak prevention treatment of interfaces of assembled composite buildings, characterized in that, It includes the following steps: Step A: A number of vertical concave positions are provided on the side walls of two adjacent precast building units (1) so that a number of vertical concave holes are formed at both ends and in the middle of the joint (2) between the two adjacent precast building units (1), and the vertical concave holes at both ends of the joint (2) are larger than the vertical concave holes in the middle; Step B: Pour cement grout with a weight ratio of 10 kg of cement ∶ 4 - 4.3 liters of water into the vertical concave holes at both ends of the joint (2); Step C: Pour cement grout with a weight ratio of 10 kg of cement ∶ 3.5 - 4 liters of water ∶ 0.05 liters of waterproof admixture ∶ 0.15 liters of binder into the vertical concave holes in the middle of the joint (2) so that the middle vertical concave holes and the joint (2) are filled with cement grout.

7. The method for leak prevention treatment of the interface of the assembled synthetic building according to claim 6, characterized in that, It further includes Step D: A foam gasket rod (3) and a sealant (4) are provided outside the vertical concave holes at the end of the joint (2).

8. The method for leak prevention treatment of the interface of the assembled synthetic building according to claim 6 or 7, characterized in that: In Step B, a UPVC conduit is used to guide a plastic bag into the vertical concave holes at the end of the joint (2) and the cement grout is introduced into the plastic bag from top to bottom until it is full, and then the UPVC conduit is removed.

9. The method for leak prevention treatment of the interface of the assembled synthetic building according to claim 6 or 7, characterized in that: Step C starts when the cement grout in the vertical concave holes at both ends of the joint (2) in Step B reaches the initial setting. In this step C, a UPVC conduit is inserted into the vertical concave holes in the middle of the joint (2) and grouting is carried out from the bottom.

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