PC prefabricated outer wall joint overrun structure and construction method thereof

Abstract

The invention provides a PC prefabricated outer wall joint ultralimit structure and a construction method thereof. The structure comprises a joint filling rod, a flexible filling material, an interface agent layer, a waterproof anti-seepage composite layer and weather-proof sealant. A first horizontal gap between every two adjacent PC prefabricated outer wall components in the vertical direction is filled with the joint filling rods and the flexible filling materials, and the flexible filling materials are located on the outer sides of the joint filling rods and horizontally extend outwards to the outer vertical faces of the PC prefabricated outer wall components; the interface agent layer is coated on the flexible joint filling material and the outer vertical surface of the PC prefabricated outer wall component, and the waterproof anti-seepage composite layer is coated on the interface agent layer; and the weather-proof glue is filled in a second horizontal gap between the upper and lower adjacent outer facing layers. The invention relates to the technical field of building construction, and can solve the technical problems in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a PC prefabricated outer wall joint out-of-limit structure and a construction method thereof. BACKGROUND

[0002] PC prefabricated outer wall components are widely used in the outer walls of new projects due to the advantages of high component precision in factory processing, fast on-site installation operation, less wet operation, and the like. The PC outer wall plate is installed on the cast-in-place concrete floor or edge beam, and the joints between the interlayer PC prefabricated outer wall components are generally filled and treated with flexible materials to ensure that the joints have a certain ability to "absorb" component deformation. However, due to construction errors of site pouring components, the joint positions between the interlayer PC prefabricated outer wall components are often out-of-limit in joint width, which leads to the fact that the PC prefabricated outer wall component joint structure in the original design drawing is no longer applicable.

[0003] Currently, when the above problems are encountered at the construction site, the conventional solution is to trim the joint width to the design joint width by batch embedding mortar at the positions where the joint width of the interlayer PC prefabricated outer wall component is out-of-limit, and then to process the joint according to the structure in the design drawing. This method mainly has the following problems:

[0004] 1. The joint width out-of-limit situation of the interlayer PC prefabricated outer wall component joint may not be the same at different positions, which brings great difficulty to batch embedding repair, and causes more labor and lower construction efficiency.

[0005] 2. The local joint width may exceed the design joint width by 1-2 centimeters, and the upper and lower joints are both out-of-limit, which requires the PC prefabricated outer wall components above and below the joint to be repaired when repairing, and the repair width of each component is small, further increasing the difficulty of repair work.

[0006] 3. The PC prefabricated outer wall component is prefabricated in the factory, and the surface of the component is smooth and has high flatness, so the bonding performance between the batch embedded mortar and the PC prefabricated outer wall component is poor without meshing, and the risk of batch embedded mortar falling off later is high.

[0007] 4. If the repair method of batch embedding after meshing is used, although the repair width of the joint is not large, the meshing width needs to meet the structural requirements, which causes the need for meshing and batch embedding mortar within a certain range on both sides of the joint, on the one hand, causing an increase in engineering cost, and on the other hand, losing the advantage of high overall flatness of the PC outer wall, causing the surface of the PC prefabricated outer wall component at the local batch embedding position to be high.

[0008] Therefore, it is necessary to provide a PC prefabricated outer wall joint out-of-limit structure and a construction method thereof, which can solve the above technical problems in the prior art. SUMMARY

[0009] The application aims to provide a PC prefabricated outer wall joint over-limit structure and a construction method thereof, which can solve the above technical problems in the prior art.

[0010] To achieve the above-mentioned purpose, the technical scheme of the application is as follows:

[0011] A PC prefabricated outer wall joint over-limit structure comprises a caulking bar, a flexible filling material, an interface agent layer, a waterproof and anti-permeable composite layer, and weather-resistant glue. The caulking bar and the flexible filling material are both filled in a first horizontal gap between two adjacent PC prefabricated outer wall components. The flexible filling material is located outside the caulking bar and extends horizontally and outwardly to the outer facade of the PC prefabricated outer wall component. The interface agent layer is coated on the outer facade of the flexible filling material and the PC prefabricated outer wall component. The waterproof and anti-permeable composite layer is coated on the interface agent layer. The weather-resistant glue is filled in a second horizontal gap between two adjacent outer facade layers.

[0012] The outer facade of the flexible filling material is flush with the outer facade of the PC prefabricated outer wall component. The outer side of the flexible filling material forms a U-shaped concave part. The width and position of the concave part are consistent with the design seam width and position of the first horizontal gap.

[0013] The wall surface of the concave part is coated with the interface agent layer and the waterproof and anti-permeable composite layer. The weather-resistant glue is filled in the concave part.

[0014] The outer facade of the weather-resistant glue is flush with the outer facade of the two adjacent outer facade layers.

[0015] The PC prefabricated outer wall component is composed of an inner wall, a thermal insulation board, and an outer wall from inside to outside.

[0016] A construction method of a PC prefabricated outer wall joint over-limit structure comprises the following steps:

[0017] Step 1: After installing two layers of PC prefabricated outer wall components on the cast-in-place concrete floor, measure the actual seam width of the first horizontal gap between the two adjacent PC prefabricated outer wall components and determine the interlayer joint treatment method.

[0018] Step 2: Customize the caulking bar according to the actual seam width of the first horizontal gap and embed the caulking bar in the first horizontal gap between the two adjacent PC prefabricated outer wall components.

[0019] Step 3: Embed the flexible filling material outside the caulking bar in the first horizontal gap.

[0020] Step 4: In the middle part of the outer side of the flexible filling material, draw a U-shaped concave part according to the interlayer joint width of the PC prefabricated outer wall component in the design drawing.

[0021] Step 5: coating interface agent on the inner wall surface of the inner recess and the range above and below it to form an interface agent layer;

[0022] Step 6: coating waterproof and impermeable material on the outer surface of the interface agent layer in the range above and below the inner recess to form a waterproof and impermeable composite layer;

[0023] Step 7: constructing an outer facing layer on the outer surface of the waterproof and impermeable composite layer, and the upper and lower adjacent two outer facing layers are located above and below the inner recess, respectively;

[0024] Step 8: filling weather-resistant glue in the inner recess, and the weather-resistant glue is filled into the second horizontal gap between the upper and lower adjacent two outer facing layers and is flush with the outer facade of the outer facing layer.

[0025] In the step 1, if the actual joint width measured by the first horizontal gap is within the range of the designed joint width, the interlayer joint of the PC prefabricated outer wall component is processed according to the original design; if the actual joint width measured by the first horizontal gap exceeds the range of the designed joint width, steps 2 to 8 are executed.

[0026] In the step 2, the customized size of the caulking rod is not less than the actual joint width of the first horizontal gap.

[0027] In the step 5, the interface agent layer extends to the range of 150 mm above and below the inner recess.

[0028] In the step 6, the waterproof and impermeable composite layer extends to the range of 100 mm above and below the inner recess.

[0029] Compared with the prior art, the present application has the following beneficial effects:

[0030] 1. The present application sets the caulking rod, fills the flexible filling material and forms the inner recess, coats the interface agent layer and the waterproof and impermeable composite layer at the over-limit position of the interlayer horizontal joint of the PC prefabricated outer wall component caused by the construction flatness error of the cast-in-place concrete floor, which ensures the good waterproof performance of the over-limit position of the interlayer horizontal joint of the PC prefabricated outer wall component, does not affect the decoration effect of the outer facade of the building, maintains the uniform joint width of the over-limit position and the normal position of the interlayer horizontal joint of the PC prefabricated outer wall component, and ensures the continuity of the outer facade, the decoration effect of the outer facade and the use function of the building.

[0031] 2. The present application is suitable for the working condition that the actual joint width of the first horizontal gap between the upper and lower adjacent two PC prefabricated outer wall components exceeds the range of the designed joint width, which can ensure the waterproof performance of the joint between the upper and lower two PC prefabricated outer wall components, can "absorb" the deformation of the two PC prefabricated outer wall components at the joint, does not affect the decoration effect of the outer facade of the building, and has the advantages of convenient and fast construction. Attached Figure Description

[0032] The above and other objects, features and advantages of this disclosure will become more apparent from the accompanying drawings, in which like reference numerals generally denote like parts.

[0033] Figure 1 This is a structural schematic diagram of the PC precast exterior wall joint exceeding the limit according to the present invention;

[0034] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0035] Figure 3 This is a construction diagram of step 1 in the construction method of the PC precast exterior wall joint exceeding the limit according to the present invention.

[0036] Figure 4 This is a construction diagram of step 2 in the construction method of the PC precast exterior wall joint exceeding the limit according to the present invention.

[0037] Figure 5 This is a construction diagram of step 3 in the construction method of the PC precast exterior wall joint exceeding the limit according to the present invention.

[0038] Figure 6 This is a construction diagram of step 4 in the construction method of the PC precast exterior wall joint exceeding the limit according to the present invention.

[0039] Figure 7 This is a construction diagram of step 5 in the construction method of the PC precast exterior wall joint exceeding the limit according to the present invention.

[0040] Figure 8 This is a construction diagram of step 6 in the construction method of the PC precast exterior wall joint exceeding the limit according to the present invention.

[0041] Figure 9 This is a construction diagram of step 7 in the construction method of the PC precast exterior wall joint exceeding the limit according to the present invention.

[0042] Figure 10 This is a construction diagram of step 8 in the construction method of the PC precast exterior wall joint exceeding the limit according to the present invention.

[0043] In the diagram, 1 is a cast-in-place concrete floor slab, 2 is a precast PC exterior wall component, 201 is an inner wall panel, 202 is an insulation board, 203 is an outer wall panel, 3 is an adhesive strip and high-strength grouting material, 4 is a caulking rod, 5 is a flexible filling material, 6 is an interface agent layer, 7 is a waterproof and seepage-resistant composite layer, 8 is an exterior finishing layer, and 9 is a weather-resistant sealant. Detailed Implementation

[0044] The PC prefabricated outer wall joint over-limit structure and the construction method thereof will be further described in detail below in combination with the drawings and specific embodiments. The advantages and features of the present application will be more apparent according to the following description and claims. It should be noted that the drawings are very simplified and non-precise in proportion, which are only used to facilitate and clarify the purpose of assisting the description of the embodiments of the present application.

[0045] Please refer to the drawings Figure 1 and the drawings Figure 2 A PC prefabricated outer wall joint over-limit structure, comprising a joint filling rod 4, a flexible joint filling material 5, an interface agent layer 6, a waterproof and anti-permeation composite layer 7 and a weather-resistant glue 9; the joint filling rod 4 and the flexible joint filling material 5 are both filled in a first horizontal gap between two adjacent PC prefabricated outer wall components 2, the flexible joint filling material 5 is located outside the joint filling rod 4 and horizontally extends to the outer facade of the PC prefabricated outer wall component 2; the interface agent layer 6 is coated on the outer facade of the PC prefabricated outer wall component 2 and the flexible joint filling material 5, and the waterproof and anti-permeation composite layer 7 is coated on the interface agent layer 6; the weather-resistant glue 9 is filled in a second horizontal gap between two adjacent outer facing layers 8.

[0046] Preferably, the joint filling rod 4 can be made of polyethylene (PE) material, which has good mechanical properties, thermal properties and weather resistance, is easier to construct than traditional joint filling mortar, and is safer, more reliable and durable. The flexible joint filling material 5 can be high-strength flexible joint filling mortar, which is used to fill the first horizontal gap. The joint filling rod 4 and the flexible joint filling material 5 ensure that the two PC prefabricated outer wall components can produce a certain free deformation at the joint, thereby preventing the PC prefabricated outer wall component 2 from generating internal stress due to thermal expansion and contraction, causing component damage, and making the over-limit joint structure have a certain "absorption" deformation ability.

[0047] The interface agent layer 6 is formed by brushing a special interface agent for PC prefabricated outer wall construction. The waterproof and anti-permeation composite layer 7 is formed by compounding waterproof material and anti-permeation material. The weather-resistant glue 9 is used to fill and seal the second horizontal gap between the two adjacent outer facing layers 8, ensuring the flatness and aesthetics of the outer facade.

[0048] The outer facade of the flexible joint filling material 5 is flush with the outer facade of the PC prefabricated outer wall component 2, and the outer side of the flexible joint filling material 5 forms a U-shaped structure recess, the width and position of which are consistent with the design joint width and position of the first horizontal gap.

[0049] Through the setting of the U-shaped structure recess with the same width and position as the design joint width and position of the first horizontal gap, the visual perception effect of the over-limit joint position is the same as that of the normal joint width position, which does not affect the overall effect of the building outer facade.

[0050] The wall surface of the inner recess is coated with an interface agent layer 6 and a waterproof and anti-seepage composite layer 7, and weather-resistant glue 9 is filled into the inner recess.

[0051] By coating the interface agent layer 6 and the waterproof and anti-seepage composite layer 7 in the inner recess, the waterproof and anti-seepage composite layer 7 and the PC prefabricated outer wall component 2 have good adhesion, and there is no risk of falling off later. At the same time, the waterproof performance of the joint is also guaranteed, so that the use function of the building is not affected due to the joint width exceeding the limit.

[0052] The outer facade of the weather-resistant glue 9 is flush with the outer facades of the two adjacent outer facing layers 8 above and below, ensuring the integrity and aesthetics of the entire outer facing.

[0053] The width of the caulking rod 4 is not less than the actual width of the first horizontal gap between the two adjacent PC prefabricated outer wall components 2 above and below, so that the caulking rod 4 is sealed and filled in the first horizontal gap, ensuring the waterproof and anti-seepage performance of the gap.

[0054] The PC prefabricated outer wall component 2 is composed of an inner leaf wall 201, a thermal insulation board 202, and an outer leaf wall 203 from inside to outside.

[0055] Please refer to the accompanying drawings Figure 1 and the accompanying drawings Figure 2 , a construction method of a PC prefabricated outer wall joint exceeding structure, comprising the following steps:

[0056] Please refer to the accompanying drawings Figure 3 , step 1: after installing two layers of PC prefabricated outer wall components 2 on the cast-in-place concrete floor 1, measuring the actual joint width of the first horizontal gap between the two adjacent PC prefabricated outer wall components 2 above and below, and determining the interlayer joint treatment method.

[0057] In step 1, if the actual joint width of the first horizontal gap is within the design joint width range, the interlayer joint treatment of the PC prefabricated outer wall component 2 is carried out according to the original design structure, which is generally a glue strip and high-strength grouting material 3, which is a conventional interlayer joint treatment means, and the construction process is not repeated here. If the actual joint width of the first horizontal gap exceeds the design joint width range, the interlayer joint treatment of the PC prefabricated outer wall component 2 is carried out by using the construction method of the PC prefabricated outer wall joint exceeding structure of the present application, that is, steps 2 to 8 are executed.

[0058] Please refer to the accompanying drawings Figure 4 , step 2: customizing the caulking rod 4 according to the actual joint width of the first horizontal gap, and embedding the caulking rod 4 into the first horizontal gap between the two adjacent PC prefabricated outer wall components 2 above and below.

[0059] In step 2, the caulking rod 4 is customized to a size not less than the actual joint width of the first horizontal gap.

[0060] Please refer to the attached drawings Figure 5 Step 3: In the first horizontal gap, outside the caulking rod 4, embed the flexible caulking material 5.

[0061] Please refer to the attached drawings Figure 6 Step 4: In the middle of the outer side of the flexible caulking material 5, draw the inner recess of the U-shaped structure according to the layer gap width of the PC prefabricated outer wall component 2 in the design drawing.

[0062] Please refer to the attached drawings Figure 7 Step 5: In the inner wall surface of the inner recess and the range above and below it, apply the interface agent to form the interface agent layer 6.

[0063] In the above-mentioned step 5, preferably, the interface agent layer 6 extends to the range of 150mm above and below the inner recess.

[0064] Please refer to the attached drawings Figure 8 Step 6: In the inner wall surface of the inner recess and the range above and below it, on the outer surface of the interface agent layer 6, apply the waterproof and impermeable material to form the waterproof and impermeable composite layer 7.

[0065] In the above-mentioned step 6, preferably, the waterproof and impermeable composite layer 7 extends to the range of 100mm above and below the inner recess.

[0066] Please refer to the attached drawings Figure 9 Step 7: On the outer surface of the waterproof and impermeable composite layer 7, construct the outer facing layer 8, and the upper and lower adjacent two pieces of the outer facing layer 8 are located above and below the inner recess respectively.

[0067] The outer facing layer 8 is constructed by conventional process, which is not described here.

[0068] Please refer to the attached drawings Figure 10 Step 8: Fill the weather-resistant glue 9 in the inner recess, the weather-resistant glue 9 is filled into the second horizontal gap between the upper and lower adjacent two pieces of the outer facing layer 8, and is flush with the outer facade of the outer facing layer 8. The above description is only a description of the preferred embodiments of the present application, and is not any limitation on the scope of the present application, any modification made by the person skilled in the art according to the above disclosure is within the protection scope of the claims.

Claims

1. A PC precast exterior wall joint out-of-plane construction, characterized in that, It comprises a filling rod (4), a flexible filling material (5), an interface agent layer (6), a waterproof and anti-permeable composite layer (7) and a weather-resistant glue (9); the filling rod (4) and the flexible filling material (5) are embedded in the first horizontal gap between the two adjacent PC prefabricated outer wall components (2), and the flexible filling material (5) is located outside the filling rod (4) and extends horizontally and outwardly to the outer facade of the PC prefabricated outer wall component (2); the interface agent layer (6) is coated on the outer facade of the flexible filling material (5) and the PC prefabricated outer wall component (2), and the waterproof and anti-permeable composite layer (7) is coated on the interface agent layer (6); the weather-resistant glue (9) is filled in the second horizontal gap between the two adjacent outer facing layers (8). The outer facade of the flexible filling material (5) is flush with the outer facade of the PC prefabricated outer wall component (2), and the outer side of the flexible filling material (5) is formed with a U-shaped concave part, and the width and position of the concave part are consistent with the design seam width and position of the first horizontal gap.

2. The PC precast wall joint out-of-plane construction of claim 1, wherein, The wall surface of the concave part is coated with the interface agent layer (6) and the waterproof and anti-permeable composite layer (7), and the weather-resistant glue (9) is filled in the concave part.

3. The PC precast wall joint out-of-plane construction of claim 2, wherein, The outer facade of the weather-resistant glue (9) is flush with the outer facade of the two adjacent outer facing layers (8).

4. The PC precast wall joint out-of-plane construction of claim 1 or 3, wherein, The PC prefabricated outer wall component (2) is composed of an inner wall (201), a thermal insulation board (202) and an outer wall (203) from inside to outside.

5. The PC precast wall joint out-of-plane construction according to claim 1 or 2, wherein, It comprises the following steps:

6. A method of constructing a PC precast exterior wall joint overrunning construction as defined in claim 2, wherein Step 1: after installing two layers of PC prefabricated outer wall components (2) on the cast-in-place concrete floor (1), the actual seam width of the first horizontal gap between the two adjacent PC prefabricated outer wall components (2) is measured, and the interlayer joint treatment method is determined; Step 2: the filling rod (4) is customized according to the actual seam width of the first horizontal gap, and the filling rod (4) is embedded in the first horizontal gap between the two adjacent PC prefabricated outer wall components (2); Step 3: in the first horizontal gap, the flexible filling material (5) is embedded outside the filling rod (4); Step 4: in the middle part of the outer side of the flexible filling material (5), a U-shaped concave part is outlined according to the interlayer joint width of the PC prefabricated outer wall component (2) in the design drawing; Step 5: the interface agent is coated on the inner wall surface of the concave part and the range above and below it to form the interface agent layer (6); Step 6: the waterproof and anti-permeable material is coated on the outer surface of the interface agent layer (6) in the range above and below the inner wall surface of the concave part to form the waterproof and anti-permeable composite layer (7); Step 7: the outer facing layer (8) is constructed on the outer surface of the waterproof and anti-permeable composite layer (7), and the two adjacent outer facing layers (8) are located above and below the concave part respectively; Step 8: the weather-resistant glue (9) is filled in the concave part, and the weather-resistant glue (9) is filled in the second horizontal gap between the two adjacent outer facing layers (8) and flush with the outer facade of the outer facing layer (8). In step 1, if the actual seam width of the first horizontal gap is within the design seam width, the interlayer joint of the PC prefabricated outer wall component (2) is treated according to the original design.

7. The construction method according to claim 6, wherein ​ If the actual gap width of the first horizontal gap measurement is out of the range of the design gap width, steps 2 to 8 are performed.

8. The construction method according to claim 6, wherein In step 2, the customized size of the caulking rod (4) is not less than the actual gap width of the first horizontal gap.

9. The construction method according to claim 6, wherein In step 5, the interface agent layer (6) extends to the range of 150 mm above and below the inner recess.

10. The construction method according to claim 6, wherein In step 6, the waterproof and anti-permeable composite layer (7) extends to the range of 100 mm above and below the inner recess.

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