Building exterior wall construction structure and building exterior wall construction method

Abstract

The present invention provides a building exterior wall construction structure and a building exterior wall construction method. The construction structure includes supporting steel, cast-in-place concrete blocks and cantilever scaffolding. One end of the supporting steel is detachably connected to a floor slab of a building main body, and the other end penetrates the cast-in-place concrete block and is cantilevered to the outside of the building main body for installing the cantilever scaffolding. The cast-in-place concrete block is a part of the exterior wall to be constructed of the building main body, and the cast-in-place concrete block is also connected to the concrete beam of the building main body through a plurality of connecting steel bars. The cast-in-place concrete block is constructed before the exterior wall to be constructed. After the construction of the exterior wall to be constructed is completed, the cast-in-place concrete block is directly used as a part of the exterior wall. When the supporting steel is subsequently pulled out, it is only necessary to quickly grout and repair the holes of the steel. Compared with the traditional method of pre-reserving the exterior wall holes to install the supporting steel, the repair time is short, and the traditional cumbersome concrete wet operation sealing is also avoided, solving the problem of the long waiting period of the traditional repair and maintenance period.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering construction, and in particular to a building exterior wall construction structure. Background Art

[0002] During construction, traditional cantilever scaffolding is fixed to the internal structure of the building by passing supporting steel through the outer wall. The supporting steel is cantilevered outside the building to form a support to bear the load of the upper cantilever scaffolding. Therefore, it is inevitable to reserve holes in the outer wall to facilitate the passage of the supporting steel.

[0003] Later, after the supporting steel is removed, fine stone concrete is poured on both sides of the hole using formwork. Due to the large hole, it is often necessary to fill it with fine stone concrete in multiple times. However, the space at the hole is small, and the vibrating rod is not easy to operate, so it is often not possible to vibrate it densely. The quality of the repair is difficult to guarantee, resulting in frequent water leakage in this area.

[0004] In addition, when repairing a hole, after the concrete repair is completed, it is necessary to wait for the water vapor inside the concrete to evaporate before the exterior wall can be painted. Otherwise, the exterior wall paint at the repair point is prone to hollowing, which will require the exterior wall insulation or paint construction to wait for a maintenance period, resulting in a longer construction period. Summary of the invention

[0005] The purpose of the present invention is to provide a building exterior wall construction structure and a building exterior wall construction method, which avoids the cumbersome concrete wet operation blocking of the reserved holes in the traditional exterior wall, solves the problem of long waiting period during the traditional repair and maintenance period, and also simplifies the fixing structure of the supporting steel section, ensuring the installation stability of the cantilever scaffolding.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a building exterior wall construction structure, including supporting steel, cast-in-place concrete blocks and cantilever scaffolding, one end of the supporting steel is detachably connected to the floor slab of a building body, and the other end passes through the cast-in-place concrete block and is cantilevered to the outside of the building body for installing the cantilever scaffolding, the cast-in-place concrete block serves as a part of the exterior wall to be constructed of the building body, and the cast-in-place concrete block is also connected to the concrete beam of the building body through a plurality of connecting steel bars.

[0007] Optionally, the cast-in-place concrete block and the concrete beam are cast integrally.

[0008] Optionally, the cast-in-place concrete block is overlapped with the structural steel bars in the concrete beam through the connecting steel bars.

[0009] Optionally, one end of the connecting steel bar is fixed in the concrete beam by planting or pre-embedding, and the other end is located in the cast-in-place concrete block.

[0010] Optionally, both side walls of the cast-in-place concrete block are flush with both side walls of the exterior wall to be constructed.

[0011] Optionally, the exterior wall to be constructed is a masonry wall or a concrete wall.

[0012] Optionally, the portion of the supporting steel that passes through the cast-in-place concrete block is covered with a concrete isolation layer.

[0013] Based on this, the present invention also provides a method for constructing a building exterior wall, comprising:

[0014] Install the supporting steel so that one end of the supporting steel is detachably connected to the floor slab of the building main body and the other end is cantilevered outside the building main body;

[0015] Delimiting a cast-in-place concrete area for the support steel to pass through at the exterior wall to be constructed of the building body;

[0016] Apply a concrete isolation layer on the outside of the portion of the support steel passing through the cast-in-place concrete area;

[0017] A formwork is provided at the concrete casting area, and a plurality of connecting steel bars are arranged in the concrete casting area, wherein one end of the connecting steel bars is located in the building body;

[0018] pouring concrete in the cast-in-place concrete area to form a cast-in-place concrete block;

[0019] Installing a cantilever scaffolding on the other end of the supporting steel;

[0020] Using the cantilever scaffolding to complete the construction of the exterior wall to be constructed;

[0021] After the construction is completed, the supporting steel is pulled out from the cast-in-place concrete block, and the holes of the steel are filled. The cast-in-place concrete block serves as a part of the completed exterior wall.

[0022] Optionally, when the exterior wall to be constructed is constructed using the cantilever scaffolding, the cast-in-place concrete blocks are used as guide walls, and the exterior wall to be constructed is directly built on the cast-in-place concrete blocks.

[0023] Optionally, self-compacting concrete is used to fill the holes in the steel sections after they are pulled out.

[0024] The present invention provides a building exterior wall construction structure and a building exterior wall construction method, which have at least one of the following beneficial effects:

[0025] 1) Since the cast-in-place concrete blocks are constructed before the exterior wall to be constructed, when the exterior wall to be constructed is completed, the cast-in-place concrete blocks are directly used as part of the exterior wall. When the supporting steel is subsequently pulled out, it is only necessary to quickly grout and repair the holes in the steel. Compared with the traditional method of reserving holes in the exterior wall, the repair time is short, and the traditional cumbersome concrete wet operation sealing is avoided, solving the problem of long waiting period during the traditional repair and maintenance period;

[0026] 2) When fixing the conventional support steel, it is not only necessary to set a fixed support point at the end, but also usually to set a fixed support point at a position close to the outer wall. In the present application, the cast-in-place concrete block is connected to the concrete beam of the building body through a plurality of connecting steel bars, so that the cast-in-place concrete block can replace the fixed support point of the support steel near the outer wall, which not only simplifies the construction steps and ensures the installation stability of the cantilever scaffolding, but also improves the connection stability between the outer wall and the concrete beam;

[0027] 3) The portion of the support steel that passes through the cast-in-place concrete block is covered with a concrete isolation layer to facilitate the subsequent extraction of the support steel from the cast-in-place concrete block;

[0028] 4) Self-compacting concrete is used to fill the holes in the extracted steel sections. The self-compacting characteristics of the material make the filling density high, avoiding the situation where the repair quality is scattered due to human operation. The quality of the hole sealing is better than that of traditional concrete pouring, and the waterproof and anti-seepage effect is better. At the same time, the labor cost is low and the repair is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Those skilled in the art will appreciate that the accompanying drawings are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention.

[0030] Figure 1 An overall diagram of the building exterior wall construction structure provided by an embodiment of the present invention;

[0031] Figure 2 A cross-sectional view of a cast-in-place concrete block provided in an embodiment of the present invention.

[0032] In the attached figure:

[0033] 1-Supporting steel; 2-Cast-in-place concrete blocks; 3-Cantilever scaffolding; 4-Floor slab; 5-Exterior wall; 6-Connecting steel bars; 7-Concrete beam; 8-Concrete isolation layer. DETAILED DESCRIPTION

[0034] In order to make the purpose, advantages and features of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In addition, the structure shown in the drawings is often a part of the actual structure. In particular, the emphasis of each drawing is different, and sometimes different scales are used.

[0035] As used in the present invention, the singular forms "one", "an", and "the" include plural objects, unless the content clearly indicates otherwise. As used in the present invention, the term "or" is generally used in a sense that includes "and / or", unless the content clearly indicates otherwise. As used in the present invention, the term "several" is generally used in a sense that includes "at least one", unless the content clearly indicates otherwise. As used in the present invention, the term "at least two" is generally used in a sense that includes "two or more", unless the content clearly indicates otherwise. In addition, the terms "first", "second", and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", and "third" may explicitly or implicitly include one or at least two of the features.

[0036] Please refer to Figure 1-Figure 2 , Figure 1 An overall diagram of the building exterior wall construction structure provided by an embodiment of the present invention;

[0037] Figure 2 A cross-sectional view of a cast-in-place concrete block provided in an embodiment of the present invention. This embodiment provides a building exterior wall construction structure, comprising a supporting steel 1, a cast-in-place concrete block 2 and a cantilever scaffold 3, wherein one end of the supporting steel 1 is detachably connected to a floor slab 4 of a building body, and the other end passes through the cast-in-place concrete block 2 and is cantilevered to the outside of the building body for installing the cantilever scaffold 3, the cast-in-place concrete block 2 is a part of the exterior wall to be constructed of the building body, and the cast-in-place concrete block 2 is also connected to the concrete beam 7 of the building body through a plurality of connecting steel bars 6.

[0038] Specifically, the cast-in-place concrete block 2 is constructed before the exterior wall to be constructed. After the construction of the exterior wall to be constructed is completed, the cast-in-place concrete block 2 is directly used as a part of the completed exterior wall 5. After the supporting steel section 1 is subsequently pulled out, only the holes in the steel section need to be quickly grouted and repaired. Compared with the traditional method of reserving holes in the exterior wall, the repair time is short, and the traditional cumbersome concrete wet operation sealing is avoided, solving the problem of long waiting period during the traditional repair and maintenance period.

[0039] In addition, when fixing, the traditional supporting steel 1 not only needs to set a fixed fulcrum at the end, but usually also needs to set at least one fixed fulcrum at a position close to the outer wall 5 to ensure the construction safety of the cantilever scaffolding 3. In the present application, since the cast-in-place concrete block 2 is connected to the concrete beam 7 of the building body through a plurality of connecting steel bars 6, the cast-in-place concrete block 2 can replace the fixed fulcrum of the supporting steel 1 near the outer wall 5, which not only ensures the stability of the cantilever scaffolding 3, but also improves the connection stability between the outer wall 5 and the concrete beam 7.

[0040] As a preferred example in this embodiment, the cast-in-place concrete block 2 is cast integrally with the concrete beam 7. During specific construction, the cast-in-place concrete block 2 can be determined according to the wall penetration position of the support steel 1, and then the casting template of the cast-in-place concrete block 2 and the concrete beam 7 is set up and cast integrally, so that the cast-in-place concrete block 2 can be used as a fixed fulcrum of the support steel 1.

[0041] Furthermore, the cast-in-place concrete block 2 is overlapped with the structural steel bars in the concrete beam 7 through the connecting steel bars 6. Before pouring concrete, the connecting steel bars 6 can be arranged so that one end of the connecting steel bars 6 overlaps with the structural steel bars in the concrete beam 7, and the other end extends into the pouring area of ​​the cast-in-place concrete block 2. After the cast-in-place concrete block 2 and the concrete beam 7 are integrally cast, the connecting steel bars 6 can improve the connection strength between the cast-in-place concrete block 2 and the concrete beam 7. At the same time, the connecting steel bars 6 can also be used as structural steel bars to improve the mechanical strength of the cast-in-place concrete block 2. Of course, in addition to arranging the connecting steel bars 6, the cast-in-place concrete block 2 can also be reinforced, and this application does not impose specific restrictions on this.

[0042] As a preferred example in this embodiment, the concrete beam 7 can be constructed first, and then one end of the connecting steel bar 6 is fixed in the concrete beam 7 by embedding or pre-embedding, and the other end is located in the cast-in-place concrete block 2. Then the cast-in-place concrete block 2 is constructed. This can also improve the connection strength between the cast-in-place concrete block 2 and the concrete beam 7.

[0043] Preferably, the side walls of the cast-in-place concrete block 2 are flush with the side walls of the exterior wall to be constructed. Since the cast-in-place concrete block 2 needs to be used as a part of the exterior wall 5 after the exterior wall to be constructed is completed, the width of the cast-in-place concrete block 2 can be designed according to the width of the exterior wall to be constructed when constructing the cast-in-place concrete block 2, so that the wall surface of the entire exterior wall 5 is smoother and more beautiful after the exterior wall 5 is completed.

[0044] In this embodiment, the exterior wall to be constructed is a masonry wall or a concrete wall. When the exterior wall to be constructed is a masonry wall, the cast-in-place concrete block 2 can be used as a guide wall, and the exterior wall to be constructed can be directly built on the cast-in-place concrete block 2, which makes construction more convenient. If the exterior wall to be constructed is a concrete wall, after the casting template is set up, part of the concrete can be directly cast on the cast-in-place concrete block 2, so that the cast-in-place concrete block 2 and the post-cast exterior wall form a whole.

[0045] Preferably, please combine Figure 2 The portion of the support steel 1 that passes through the cast-in-place concrete block 2 is coated with a concrete isolation layer 8. The concrete isolation layer 8 is mainly used to isolate concrete, so as to facilitate the subsequent extraction of the support steel 1 from the cast-in-place concrete block 2. In this embodiment, the concrete isolation layer 8 includes, for example, a friction-reducing material (such as butter) applied on the outside of the support steel 1 and a PE film for wrapping.

[0046] In this embodiment, the supporting steel 1 is, for example, a channel steel or an I-beam, which is not limited in the present application.

[0047] In this embodiment, one end of the support steel 1 can be detachably connected to the floor plate 4 through a U-shaped screw commonly used in the art. The opening of the U-shaped screw faces upward, and the closed end of the U-shaped screw is buried in the floor plate 4. The two ends of the open end pass through a steel plate and are locked by nuts. The steel plate is pressed on the support steel 1, and the support steel 1 is pressed and fixed on the floor plate 4.

[0048] Based on this, please combine Figure 1 and Figure 2 The present invention also provides a method for constructing a building exterior wall, comprising:

[0049] S1. Install the support steel 1 so that one end of the support steel 1 is detachably connected to the floor slab 4 of the building body, and the other end is cantilevered outside the building body;

[0050] S2, defining a cast-in-place concrete area for the support steel 1 to pass through at the exterior wall to be constructed of the building body;

[0051] S3, applying a concrete isolation layer 8 on the outside of the portion of the support steel 1 passing through the concrete cast-in-place area;

[0052] S4, supporting a formwork at the concrete cast-in-place area, and arranging a plurality of connecting steel bars 6 in the concrete pouring area, wherein one end of the connecting steel bars 6 is located in the building body;

[0053] S5, pouring concrete in the cast-in-place concrete area to form a cast-in-place concrete block 2;

[0054] S6, installing the cantilever scaffolding 3 on the other end of the supporting steel 1;

[0055] S7, using the cantilever scaffolding 3 to complete the construction of the exterior wall to be constructed;

[0056] S8. After the construction is completed, the support steel 1 is pulled out from the cast-in-place concrete block 2, and grouting is performed on the pulled-out holes. The cast-in-place concrete block 2 serves as a part of the completed exterior wall 5.

[0057] First, step S1 is performed to determine the position of the support steel 1 according to the design scheme of the cantilever scaffolding 3, and to install the support steel 1 so that one end of the support steel 1 is detachably connected to the floor plate 4 of the building body, and the other end is cantilevered outside the building body. The support steel 1 and the floor plate 4 can be detachably connected to the floor plate 4 of the building body through components such as U-shaped screws, and this application does not limit this.

[0058] Then, step S2 is executed to define a cast-in-place concrete area for the support steel 1 to pass through at the exterior wall to be constructed of the building body. According to the area of ​​the exterior wall to be constructed, a cast-in-place concrete area is defined to form cast-in-place concrete blocks 2, which are directly used as part of the exterior wall 5 after the exterior wall 5 is constructed.

[0059] Then, step S3 is performed to apply a concrete isolation layer 8 on the outside of the portion of the supporting steel section 1 that passes through the cast-in-place concrete area. The concrete isolation layer 8 mainly serves to isolate the concrete poured in the cast-in-place concrete area, so as to facilitate the subsequent extraction of the steel section from the cast-in-place concrete block 2.

[0060] Then, step S4 is performed, a casting template is set up at the concrete cast-in-place area, and a plurality of connecting steel bars 6 are arranged in the concrete casting area, one end of the connecting steel bars 6 is located in the building body. In this embodiment, the cast-in-place concrete block 2 and the concrete beam 7 of the building body can be cast as one piece, or the concrete beam 7 can be cast first and then the cast-in-place concrete block 2 can be cast, and this application does not limit this. If the cast-in-place concrete block 2 and the concrete beam 7 of the building body are cast as one piece, the connecting steel bars 6 can be arranged before the concrete is cast, so that one end of the connecting steel bar 6 overlaps with the structural steel bar in the concrete beam 7, and the other end extends into the casting area of ​​the cast-in-place concrete block 2 to improve the connection strength between the cast-in-place concrete block 2 and the concrete beam 7. At the same time, the connecting steel bars 6 can also be used as structural steel bars to improve the mechanical strength of the cast-in-place concrete block 2. If the concrete beam 7 is cast first and the cast-in-place concrete block 2 is cast later, one end of the connecting steel bar 6 can be fixed in the concrete beam 7 by planting or pre-embedding, and the other end is located in the cast-in-place concrete block 2.

[0061] Then, step S5 is performed to pour concrete in the cast-in-place concrete area to form a cast-in-place concrete block 2 .

[0062] Then, step S6 is performed to install the cantilever scaffold 3 on the other end of the support steel 1. The cantilever scaffold 3 is fixed in a conventional manner in the art and is not within the protection scope of this application.

[0063] Then, step S7 is performed to complete the construction of the exterior wall to be constructed using the cantilever scaffold 3. In this embodiment, the exterior wall to be constructed is a masonry wall or a concrete wall. When the exterior wall to be constructed is a masonry wall, the cast-in-place concrete block 2 can be used as a guide wall, and the exterior wall to be constructed can be directly built on the cast-in-place concrete block 2, which makes construction more convenient. If the exterior wall to be constructed is a concrete wall, part of the concrete can be directly poured on the cast-in-place concrete block 2 after the casting formwork is set up, so that the cast-in-place concrete block 2 is integrated into the entire exterior wall 5.

[0064] Finally, step S8 is performed. After the construction is completed, the supporting steel 1 is extracted from the cast-in-place concrete block 2, and the holes of the extracted steel are grouted. The cast-in-place concrete block 2 serves as a part of the completed exterior wall 5. In this embodiment, self-compacting concrete materials can be used to fill the extracted steel holes. Due to the self-compacting characteristics of the material, the filling density is high, avoiding the situation where the repair quality is scattered due to "human" operation. The hole sealing quality is better than the traditional concrete pouring density, and the waterproof and anti-seepage effect is better. At the same time, the labor cost is low, and the repair is convenient and quick.

[0065] In summary, the embodiments of the present invention provide a building exterior wall construction structure and a building exterior wall construction method. Since the cast-in-place concrete block is constructed before the exterior wall to be constructed, when the exterior wall to be constructed is completed, the cast-in-place concrete block directly serves as part of the exterior wall. When the supporting steel is subsequently pulled out, it is only necessary to quickly grout and repair the holes in the steel. Compared with the traditional method of reserving holes in the exterior wall, the repair time is short, and the traditional cumbersome wet concrete operation sealing is avoided, solving the problem of long waiting period during the traditional repair and maintenance period. At the same time, the cast-in-place concrete block can also be used as a fixed fulcrum for the supporting steel, which not only simplifies the construction steps and ensures the installation stability of the cantilever scaffolding, but also improves the connection stability between the exterior wall and the concrete beam.

[0066] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the content of the technical solution of the present invention and still falls within the protection scope of the present invention.

Claims

1. A method for constructing an exterior wall of a building, characterized in that: include: Install the supporting steel so that one end of the supporting steel is detachably connected to the floor slab of the building main body and the other end is cantilevered outside the building main body; Demarcate a cast-in-place concrete area for the support steel to pass through at the exterior wall to be constructed of the building body; Apply a concrete isolation layer on the outside of the portion of the support steel passing through the cast-in-place concrete area; A formwork is provided at the concrete cast-in-place area, and a plurality of connecting steel bars are arranged in the concrete cast-in-place area, wherein one end of the connecting steel bars is located in the building body; pouring concrete in the cast-in-place concrete area to form a cast-in-place concrete block; Installing a cantilever scaffolding on the other end of the supporting steel; Using the cantilever scaffolding to complete the construction of the exterior wall to be constructed; After the construction is completed, the supporting steel is pulled out from the cast-in-place concrete block, and the holes of the pulled-out steel are filled, and the cast-in-place concrete block serves as a part of the completed exterior wall.

2. The building exterior wall construction method according to claim 1, wherein the exterior wall to be constructed is a masonry wall, characterized in that: When the cantilever scaffold is used to construct the exterior wall to be constructed, the cast-in-place concrete blocks are used as guide walls, and the exterior wall to be constructed is directly built on the cast-in-place concrete blocks.

3. The building exterior wall construction method according to claim 1, characterized in that: Self-compacting concrete is used to fill the holes in the steel sections after they are pulled out.

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