Replacement and reinforcement structure inside old cavity wall masonry
By setting first and second reinforcing bricks inside the hollow hopper wall to form a structure similar to a structural column, combined with vertical channels and steel reinforcement, the problems of insufficient reinforcement of the hollow hopper wall and long construction period are solved, achieving efficient reinforcement and appearance protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 央固工程科技(上海)有限公司
- Filing Date
- 2025-06-25
- Publication Date
- 2026-07-07
AI Technical Summary
Existing methods for reinforcing hollow walls suffer from problems such as insufficient reinforcement, long construction periods, and significant damage to the building's appearance.
The first and second reinforcing bricks are alternately arranged along the height direction to form a structure similar to a structural column, and reinforcement is achieved through vertical channels and steel bars to avoid damaging the building's appearance and shorten the construction period.
It improves the reinforcement strength and rigidity of the hollow wall, protects the building's appearance, and has a short construction period.
Smart Images
Figure CN224468846U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of existing hollow cavity wall reinforcement technology, and in particular to the internal replacement and reinforcement structure of old hollow cavity wall masonry. Background Technology
[0002] Hollow brick walls refer to hollow walls constructed by side-laying or alternating side-laying with bricks. They are usually constructed using standard bricks (240mm×115mm×53mm) and are classified according to the direction of brick laying. The most common method is the sleepless hollow brick wall, where each row of bricks consists of alternating header and header bricks.
[0003] Compared to ordinary solid walls of the same thickness, hollow cavity walls save on bricks, mortar, and labor. Furthermore, the air gaps within the wall improve thermal insulation and heat preservation. However, due to their internal hollow structure, hollow cavity walls have poor seismic performance and insufficient overall rigidity, requiring reinforcement after long-term use.
[0004] Existing reinforcement methods for existing hollow brick masonry structures typically involve double-sided reinforced mesh plastering or pressure grouting. These methods have the following drawbacks:
[0005] 1. Increased wall load, affecting foundation stability;
[0006] 2. The construction period is long and causes significant damage to the building's appearance;
[0007] 3. Grouting material is difficult to fill cavities evenly, which can easily create weak areas. Utility Model Content
[0008] The purpose of this application is to address the problems of insufficient reinforcement, long construction period, and significant damage to the building's appearance caused by existing hollow wall reinforcement structures. Therefore, this application provides an internal replacement and reinforcement structure for old hollow wall masonry, which strengthens the internal walls of the hollow wall, avoids damage to the building's appearance, and forms a structure similar to a structural column through first reinforcing bricks, second reinforcing bricks, and steel bars, resulting in good reinforcement effect and short construction period.
[0009] This application provides an internal replacement and reinforcement structure for old hollow brick masonry, used to replace part of the existing inner wall along the height direction, including multiple first reinforcement bricks, second reinforcement bricks and steel bars;
[0010] Both the first reinforcing brick and the second reinforcing brick are used to replace the dou brick, and are alternately arranged along the height direction of the existing inner wall, and are connected vertically to form a vertical channel, which is reinforced with steel bars;
[0011] At least two first reinforcing bricks are provided in the same brick layer and are used to replace adjacent bucket bricks; at least one second reinforcing brick is provided in the same brick layer and is used to replace the bucket bricks that are connected to two first reinforcing bricks located in adjacent brick layers.
[0012] By adopting the above technical solution, the internal wall of the hollow cavity wall is reinforced, meaning that the reinforcement work surface is located inside the existing building. This not only reinforces the existing hollow cavity wall but also avoids damaging its external structure, thus protecting the original appearance of the existing building. Furthermore, by using first reinforcing bricks, second reinforcing bricks, and steel bars, the hollow cavity wall is reinforced along the height direction, forming a structure similar to a structural column. This results in a good reinforcement effect, meaning higher strength and rigidity. Moreover, the construction period for dismantling and laying bricks is shorter than the construction period for large-area, large-volume grouting.
[0013] In some embodiments, the first reinforcing brick is provided with a first through groove along the height direction, and the opening of the first through groove faces the outside or inside of the existing inner wall.
[0014] The second reinforcing brick is provided with a second through groove and a third through groove along the height direction, and the openings of the second through groove and the third through groove both face the outside or inside of the existing inner wall.
[0015] The first through groove of the first reinforcing brick located on one side of the second reinforcing brick and the second through groove of the second reinforcing brick are connected vertically to form a vertical channel, and the first through groove of the first reinforcing brick located on the other side of the second reinforcing brick and the third through groove of the second reinforcing brick are connected vertically to form another vertical channel.
[0016] By adopting the above technical solution, a vertical channel is formed by the first through groove and the second or third through groove, and the opening of the through groove faces the outside or inside of the existing inner wall, so that the vertical channel has a lateral opening facing the construction work surface, which facilitates the combination of steel bars and vertical channel during construction; in addition, two steel bars are set in the two vertical channels to further improve the reinforcement effect.
[0017] In some embodiments, the first reinforcing brick is provided with the first through groove on both opposite sides, and one of the two first through grooves has an opening facing the outside of the existing inner wall and the other has an opening facing the inside of the existing inner wall.
[0018] The second reinforcing brick is provided with a second through groove and a third through groove on both opposite sides. The openings of the second through groove and the third through groove on one side of the second reinforcing brick face the outside of the existing inner wall, and the openings of the second through groove and the third through groove on one side of the second reinforcing brick face the inside of the existing inner wall.
[0019] By adopting the above technical solution, steel bars are installed both inside and outside the reinforced structure, forming a circumferential four-bar steel bar structure, which further improves the reinforcement effect.
[0020] In some embodiments, the thickness of both the first reinforcing brick and the second reinforcing brick is greater than the thickness of the bucket brick, and less than the difference between the length and thickness of the bucket brick.
[0021] The above technical solution facilitates the setting of the through-channel and ensures the strength of the reinforcing bricks. At the same time, the reduced gap space reduces the amount of grout to be injected, accelerates grout curing, and shortens the construction cycle.
[0022] In some embodiments, the vertical channel and the space between the reinforcement structure and the existing exterior wall are filled with grout.
[0023] In some embodiments, the fluidity of the slurry is >300 mm.
[0024] In some embodiments, a decorative surface layer is also included, which covers the outer sides of the first and second reinforcing bricks and is in contact with the outer surface of the existing interior wall.
[0025] In some embodiments, the decorative surface layer is a wire mesh mortar layer.
[0026] In some embodiments, the density of the first reinforcing brick and the second reinforcing brick is ≤800kg / m³. 3 Strength ≥ MU10.
[0027] Other features and corresponding beneficial effects of this application will be described in the latter part of the specification, and it should be understood that at least some of the beneficial effects will become obvious from the description in this application. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the structure after construction of this application;
[0029] Figure 2 This is a structural schematic diagram of the first reinforcing brick in this application;
[0030] Figure 3 This is a schematic diagram of the structure of the second reinforcing brick in this application.
[0031] Explanation of reference numerals in the attached figures:
[0032] 1. Existing interior walls; 2. Concrete bricks; 3. Header bricks;
[0033] 10. First reinforcing brick; 11. First through groove;
[0034] 20. Second reinforcing brick; 21. Second through groove; 22. Third through groove;
[0035] 30. Steel bars. Detailed Implementation
[0036] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application is presented in conjunction with preferred embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.
[0037] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0038] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more. Unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0039] The hollow wall includes inner and outer walls. Each layer of bricks is usually laid alternately with dou bricks 2 and header bricks 3, and the header bricks 3 are located in the middle of the dou bricks 2 in adjacent layers.
[0040] The terms "douzhuan 2" and "zhangzhuan 3" are defined based on the different laying directions of standard bricks. Douzhuan 2 refers to side bricks laid parallel to the wall, while zhangzhuan 3 refers to side bricks laid perpendicular to the wall.
[0041] Please see Figure 1-3 , Figure 1 This is a schematic diagram of the structure after construction of this application; Figure 2 This is a schematic diagram of the structure of the first reinforcing brick 10 in this application; Figure 3 This is a schematic diagram of the structure of the second reinforcing brick 20 in this application.
[0042] This application provides an internal replacement and reinforcement structure for old hollow brick walls, which is used to replace part of the existing inner wall 1 along the height direction. That is, the reinforcement working surface is located inside the existing building. This can both reinforce the existing hollow brick walls and avoid damaging their external structure, thereby protecting the original appearance of the existing building.
[0043] However, this method only reinforces one side of the hollow wall. If conventional reinforcement structures are used, such as 30 mesh steel reinforcement plastering, the reinforcement strength and rigidity are relatively weak.
[0044] Therefore, by forming a structure similar to a structural column, this reinforcement structure ensures both reinforcement strength and rigidity, and also controls the construction period. Specifically, this reinforcement structure includes multiple first reinforcement bricks 10, second reinforcement bricks 20, and steel bars 30.
[0045] The first reinforcing brick 10 and the second reinforcing brick 20 are both used to replace the dou brick 2, and are alternately set along the height direction of the existing inner wall 1, and are connected vertically to form a vertical channel, and the vertical channel is equipped with steel bars 30.
[0046] At least two first reinforcing bricks 10 are provided in the same brick layer and are used to replace adjacent hopper bricks 2. At least one second reinforcing brick 20 is provided in the same brick layer and is used to replace the hopper bricks 2 that are connected to the two first reinforcing bricks 10 located in adjacent brick layers.
[0047] Meanwhile, this method forms a masonry wall structure similar to structural columns, which is more suitable for later reinforcement construction compared to forming a reinforced masonry shear wall structure. Furthermore, the construction cycle for dismantling and laying bricks is shorter than the construction cycle for large-area, large-volume grouting.
[0048] In one embodiment, the first reinforcing brick 10 is provided with a first through groove 11 along the height direction, and the opening of the first through groove 11 faces the outside or inside of the existing inner wall 1, that is, towards the construction work surface.
[0049] The second reinforcing brick 20 is provided with a second through groove 21 and a third through groove 22 along the height direction, and the openings of the second through groove 21 and the third through groove 22 are both facing the outside or inside of the existing inner wall 1, that is, facing the construction work surface.
[0050] The first through groove 11 of the first reinforcing brick 10 located on one side of the second reinforcing brick 20 and the second through groove 21 of the second reinforcing brick 20 are connected vertically to form a vertical channel. The first through groove 11 of the first reinforcing brick 10 located on the other side of the second reinforcing brick 20 and the third through groove 22 of the second reinforcing brick 20 are connected vertically to form another vertical channel.
[0051] This method forms a vertical channel through the first through groove 11 and the second through groove 21 or the third through groove 22, with the opening of the through groove facing the outside or inside of the existing inner wall 1. This allows the vertical channel to have a lateral opening facing the construction work surface, which facilitates the combination of the reinforcing steel 30 and the vertical channel during construction. For example, if the opening of the through groove faces the outside of the existing inner wall 1, during construction, the reinforcing bricks are laid first, and then the reinforcing steel 30 is pushed horizontally into the corresponding vertical channel. If the opening of the through groove faces the inside of the existing inner wall 1, during construction, the reinforcing steel 30 is placed in the corresponding position first, and then the reinforcing bricks are laid, so that the through groove of the reinforcing bricks covers the reinforcing steel 30.
[0052] At the same time, the two vertical channels are equipped with two steel bars of size 30, which further improves the reinforcement effect, that is, the strength and rigidity are higher.
[0053] In one embodiment, the first reinforcing brick 10 is provided with a first through groove 11 on both opposite sides, and one of the two first through grooves 11 has its opening facing the outside of the existing inner wall 1, while the other has its opening facing the inside of the existing inner wall 1.
[0054] The second reinforcing brick 20 has a second through groove 21 and a third through groove 22 on both opposite sides. The openings of the second through groove 21 and the third through groove 22 on one side of the second reinforcing brick 20 face the outside of the existing inner wall 1, and the openings of the second through groove 21 and the third through groove 22 on one side of the second reinforcing brick 20 face the inside of the existing inner wall 1.
[0055] This method ensures that the reinforced structure has 30 steel bars both inside and outside, forming a structure with 4 30 steel bars in the circumferential direction, which further improves the reinforcement effect.
[0056] In one embodiment, the thickness of the first reinforcing brick 10 and the second reinforcing brick 20 is greater than the thickness of the bucket brick 2 and less than the difference between the length and thickness of the bucket brick 2, so that the reinforcing brick has a certain thickness, which facilitates the setting of the through groove and ensures the strength of the reinforcing brick; at the same time, since the gap between the reinforcing brick and the existing exterior wall is reduced, the amount of subsequent grout can be reduced, the grout curing can be accelerated, and the construction cycle can be shortened.
[0057] In one embodiment, grout is filled within the vertical channel and between the reinforced structure and the existing exterior wall, thereby strengthening the bond between the first reinforcing brick 10, the second reinforcing brick 20, the reinforcing steel bar 30, and the existing wall, forming an integral grid structure and further improving the reinforcement effect. Preferably, the grout has a fluidity >300mm, for example, ultrafine cement-based grout can be used.
[0058] In one embodiment, the reinforcement structure further includes a decorative surface layer that covers the outer side of the first reinforcing brick 10 and the second reinforcing brick 20 and is in contact with the outer surface of the existing inner wall 1.
[0059] In one implementation, the finishing layer is a wire mesh mortar layer, typically using wire mesh mortar compatible with the original wall to restore the uniformity of appearance.
[0060] In one embodiment, the density of the first reinforcing brick 10 and the second reinforcing brick 20 is ≤800kg / m³. 3 The strength must be ≥MU10 to ensure processing strength.
[0061] The standard bricks used for hollow wall construction are usually 240mm×115mm×53mm. To facilitate construction, in one specific embodiment, the overall dimensions of the first reinforcing brick 10 and the second reinforcing brick 20 are both 240mm×115mm×177mm. The fixed dimensions facilitate construction and improve efficiency. At the same time, it makes the gap between the reinforced structure and the existing exterior wall smaller, avoiding a large amount of wet work (grouting) on site, further improving efficiency, and is more environmentally friendly.
[0062] Furthermore, the dimensions of the through grooves are all 15mm×115mm×40mm, and they are made of 12mm diameter steel bars.
[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A replacement and reinforcement structure for the interior of old hollow brick masonry, used to replace a portion of the existing interior wall along the height direction, characterized in that, Includes multiple first reinforcing bricks, second reinforcing bricks, and steel bars; Both the first reinforcing brick and the second reinforcing brick are used to replace the dou brick, and are alternately arranged along the height direction of the existing inner wall, and are connected vertically to form a vertical channel, which is reinforced with steel bars; At least two first reinforcing bricks are provided in the same brick layer and are used to replace adjacent bucket bricks; at least one second reinforcing brick is provided in the same brick layer and is used to replace the bucket bricks that are connected to two first reinforcing bricks located in adjacent brick layers.
2. The internal replacement and reinforcement structure for old hollow brick wall masonry according to claim 1, characterized in that, The first reinforcing brick is provided with a first through groove along the height direction, and the opening of the first through groove faces the outside or inside of the existing inner wall. The second reinforcing brick is provided with a second through groove and a third through groove along the height direction, and the openings of the second through groove and the third through groove both face the outside or inside of the existing inner wall. The first through groove of the first reinforcing brick located on one side of the second reinforcing brick and the second through groove of the second reinforcing brick are connected vertically to form a vertical channel, and the first through groove of the first reinforcing brick located on the other side of the second reinforcing brick and the third through groove of the second reinforcing brick are connected vertically to form another vertical channel.
3. The internal replacement and reinforcement structure for old hollow brick wall masonry according to claim 2, characterized in that, The first reinforcing brick is provided with the first through groove on both opposite sides, and one of the two first through grooves has its opening facing the outside of the existing inner wall, while the other has its opening facing the inside of the existing inner wall. The second reinforcing brick is provided with a second through groove and a third through groove on both opposite sides. The openings of the second through groove and the third through groove on one side of the second reinforcing brick face the outside of the existing inner wall, and the openings of the second through groove and the third through groove on one side of the second reinforcing brick face the inside of the existing inner wall.
4. The internal replacement and reinforcement structure for old hollow brick wall masonry according to claim 1, characterized in that, The thickness of both the first reinforcing brick and the second reinforcing brick is greater than the thickness of the bucket brick, and less than the difference between the length and thickness of the bucket brick.
5. The internal replacement and reinforcement structure for old hollow brick wall masonry according to claim 4, characterized in that, The vertical passage and the space between the reinforced structure and the existing exterior wall are filled with grout.
6. The internal replacement and reinforcement structure for old hollow brick wall masonry according to claim 5, characterized in that, The fluidity of the slurry is >300mm.
7. The internal replacement and reinforcement structure for old hollow brick wall masonry according to claim 1, characterized in that, It also includes a decorative surface layer, which covers the outside of the first and second reinforcing bricks and is in contact with the outer surface of the existing interior wall.
8. The internal replacement and reinforcement structure for old hollow brick wall masonry according to claim 7, characterized in that, The decorative surface layer is a wire mesh mortar layer.
9. The internal replacement and reinforcement structure for old hollow brick wall masonry according to any one of claims 1-8, characterized in that, The density of the first reinforcing brick and the second reinforcing brick is ≤800kg / m³, and the strength is ≥MU10.