Internal replacement and reinforcement method for old masonry of rowlock wall

Abstract

The invention provides a method for replacing and reinforcing the interior of old masonry of an empty bucket wall, and belongs to the technical field of reinforcement of existing empty bucket walls. In order to solve the problems of insufficient reinforcement, long construction period and large damage to the appearance of a building of an existing rowlock wall reinforcing structure, the invention provides a rowlock wall old masonry interior replacement reinforcing method which comprises the following steps: S1, position selection: selecting a replacement part which is located on an existing inner wall body and extends in the height direction of the existing inner wall body, the replacement part comprises a plurality of brick layers, and the brick layers are alternately formed by one layer of two bucket bricks and one layer of bucket bricks; s2, replacement is conducted, specifically, the bucket bricks at the replacement part are dismantled, first reinforcing bricks or second reinforcing bricks and steel bars are implanted, the first reinforcing bricks and the second reinforcing bricks are alternately arranged in the height direction of the existing inner wall body and communicate up and down to form a vertical channel, and the steel bars are arranged in the vertical channel or the corresponding position of the vertical channel; s3, grouting is conducted; and S4, surface repairing. The internal wall body of the rowlock wall is reinforced, the appearance of a building can be prevented from being damaged, a structure similar to a constructional column is formed through the first reinforcing bricks, the second reinforcing bricks and the steel bars, the reinforcing effect is good, and the construction period is short.

Description

Technical Field

[0001] The present application relates to the technical field of reinforcement of existing hollow walls, and in particular to a method for internal replacement reinforcement of old masonry of hollow walls. Background Art

[0002] A hollow wall refers to a hollow wall built with bricks laid sideways or alternately horizontally and sideways. It is usually built with standard bricks (240mm×115mm×53mm) and is divided according to the laying direction of the bricks. The most common method is a hollow wall without sleeping holes, that is, each row of bricks is laid alternately with bucket bricks and Ding bricks.

[0003] Compared to conventional solid walls of the same thickness, hollow walls save on bricks, mortar, and labor. Furthermore, the air barrier formed within the wall improves thermal insulation and heat preservation. However, due to the internal voids, hollow walls have poor seismic performance and insufficient overall rigidity, requiring reinforcement after long-term use.

[0004] The existing reinforcement methods for existing hollow wall masonry buildings are usually double-sided steel mesh plastering or pressure grouting. The existing reinforcement methods have the following defects:

[0005] 1. Increase wall load and affect foundation stability;

[0006] 2. The construction period is long and the damage to the building appearance is great;

[0007] 3. It is difficult for the grouting material to fill the cavity evenly, which easily leads to weak areas. Summary of the Invention

[0008] The purpose of this application is to address the existing problems of insufficient reinforcement of existing hollow wall reinforcement structures, long construction periods, and significant damage to the building's appearance. Therefore, this application provides a method for internally replacing and reinforcing the old masonry of a hollow wall. This method reinforces the interior of the hollow wall without damaging the building's appearance. Furthermore, by forming a structure similar to a structural column using first and second reinforcement bricks and steel bars, the method achieves excellent reinforcement and shortens the construction period.

[0009] The present application provides a method for internal replacement reinforcement of old masonry in a hollow wall, comprising:

[0010] S1: selecting a replacement site, wherein the replacement site is located in the existing inner wall and extends along the height direction of the existing inner wall, and the replacement site includes multiple brick layers, and the multiple brick layers are alternately formed by two bucket bricks in one layer and one bucket brick in another layer;

[0011] S2 replacement: removing the bucket bricks at the replacement location and inserting the first reinforcement bricks or the second reinforcement bricks and steel bars, wherein the first reinforcement bricks and the second reinforcement bricks are alternately arranged along the height direction of the existing inner wall and connected up and down to form a vertical channel, and steel bars are arranged in the vertical channel or in the corresponding position of the vertical channel;

[0012] S3 grouting: filling the vertical channel and between the replacement part and the existing outer wall with slurry;

[0013] S4 Surface repair: Cover the surface of the replacement part with a finishing layer and connect it with the outer surface of the existing inner wall.

[0014] By adopting the above technical solution, the inner wall of the hollow wall is reinforced, that is, the reinforcement working surface is located inside the existing building, which can not only reinforce the existing hollow wall, but also avoid damaging its external structure, thereby protecting the original appearance of the existing building; and, by using the first reinforcement bricks, the second reinforcement bricks and the steel bars, the hollow wall is replaced and reinforced along the height direction, that is, a structure similar to a structural column is formed, which has a good reinforcement effect, that is, higher strength and rigidity, and the construction period of brick dismantling and laying is short compared to the existing large-area and large-volume slurry pouring construction period.

[0015] 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 of the existing inner wall;

[0016] 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 are both facing the outside of the existing inner wall;

[0017] The first reinforcing brick replaces the bucket bricks in two bucket bricks in a layer of the replacement position, and the second reinforcing brick replaces the bucket brick in one bucket brick in a layer of the replacement position, and the first through groove of the first reinforcing brick and the second through groove of the second reinforcing brick on one side of the second reinforcing brick are vertically connected to form one vertical channel, and the first through groove of the first reinforcing brick and the third through groove of the second reinforcing brick on the other side of the second reinforcing brick are vertically connected to form another vertical channel; and

[0018] The S2 replacement is as follows: the bucket bricks at the replacement position are removed layer by layer, and a first reinforcement brick or a second reinforcement brick is correspondingly implanted for each bucket brick removed, and steel bars are placed in the two vertical channels.

[0019] In some embodiments, the first through grooves are provided on two opposite sides of the first reinforcing brick, and one of the two first through grooves opens toward the outside of the existing inner wall, and the other opens toward the inside of the existing inner wall;

[0020] The second through groove and the third through groove are provided on two opposite sides of the second reinforcing brick, and the openings of the second through groove and the third through groove on one side of the second reinforcing brick are both oriented toward 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 are both oriented toward the inside of the existing inner wall; and

[0021] S2 replacement is: completely remove the bucket bricks at the replacement position, set steel bars in the corresponding positions of the vertical channel with two openings facing the inside of the existing inner wall, implant the first reinforcement block or the second reinforcement block, and then set steel bars in the vertical channel with two openings facing the outside of the existing inner wall.

[0022] In some embodiments, the thickness of the first reinforcement brick and the second reinforcement brick are both greater than the thickness of the bucket brick and less than the difference between the length of the bucket brick and its thickness.

[0023] In some embodiments, the fluidity of the slurry is >300 mm.

[0024] In some embodiments, the finishing surface layer is a wire mesh mortar layer.

[0025] In some embodiments, the density of the first reinforcement brick and the second reinforcement brick is ≤800 kg / m 3 , strength ≥MU10.

[0026] Other features and corresponding beneficial effects of the present application are described in the latter part of the specification, and it should be understood that at least some of the beneficial effects become obvious from the description in the specification of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the application process;

[0028] Figure 2 Schematic diagram of the construction structure for this application;

[0029] Figure 3 This is a schematic diagram of the structure of the first reinforcement brick in this application;

[0030] Figure 4 This is a schematic structural diagram of the second reinforcement brick in this application.

[0031] Description of reference numerals:

[0032] 1. Existing interior walls; 2. Dou bricks; 3. Ding bricks;

[0033] 10. First reinforcement brick; 11. First through groove;

[0034] 20. Second reinforcing brick; 21. Second through groove; 22. Third through groove;

[0035] 30. Steel bars. DETAILED DESCRIPTION

[0036] The following specific embodiments illustrate the implementation of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this application are limited to this implementation. On the contrary, the purpose of introducing the application in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present application. In order to provide an in-depth understanding of the present application, the following description will contain many specific details. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other unless there is a conflict.

[0037] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0038] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting this application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention of this application, unless otherwise specified, "multiple" means two or more. Unless otherwise specified and limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] The hollow bucket wall includes inner and outer walls. Each layer of bricks is usually built alternately with bucket bricks 2 and diagonal bricks 3, and the diagonal bricks 3 in the upper and lower adjacent layers are located in the middle of the bucket bricks 2.

[0040] Bucket bricks 2 and Ding bricks 3 are defined according to the different laying directions of standard bricks, wherein bucket bricks 2 refer to side bricks parallel to the wall surface, and Ding bricks 3 refer to side bricks perpendicular to the wall surface.

[0041] See Figure 1-2 , Figure 1 This is a schematic diagram of the application process; Figure 2 This is a schematic diagram of the construction structure for this application.

[0042] The present application provides a method for internal replacement reinforcement of old masonry in a hollow wall, comprising:

[0043] S1 position selection: select a replacement part, the replacement part is located in the existing inner wall 1 and extends along the height direction of the existing inner wall 1, the replacement part includes multiple brick layers, and the multiple brick layers are alternately formed by two bucket bricks 2 in one layer and one bucket brick 2 in another layer.

[0044] Preferably, the replacement location is close to the door opening on the hollow wall. Usually, the wall close to the door opening is easily damaged and has weaker strength and rigidity.

[0045] Furthermore, a replacement location is set every 2 meters, thereby further enhancing the overall reinforcement effect.

[0046] The replacement part is located in the existing inner wall 1, that is, the reinforcement working surface is located inside the existing building, which can not only reinforce the existing hollow wall but also avoid damaging its external structure, thereby protecting the original appearance of the existing building.

[0047] However, this method only reinforces one wall in the hollow wall. If a conventional reinforcement structure is used, such as 30-mesh steel bar plastering, the reinforcement strength and rigidity are relatively weak.

[0048] Therefore, this method not only ensures the reinforcement effect by forming a structure similar to a structural column, but is also more suitable for later reinforcement construction than forming a structure similar to a reinforced masonry shear wall structure. In addition, the construction period of brick removal is shorter than the construction period of existing large-area and large-volume slurry pouring. Specifically,

[0049] S2 Replacement: Remove the bucket bricks 2 at the replacement location and replace them with first reinforcement bricks 10 or second reinforcement bricks 20, along with steel bars 30. The first reinforcement bricks 10 and second reinforcement bricks 20 are alternately arranged along the height of the existing inner wall 1 and connected vertically to form a vertical channel. Steel bars 30 are installed in the vertical channel or at corresponding positions within the vertical channel.

[0050] S3 Grouting: Fill the vertical channels and between the replacement site and the existing exterior wall with grout, strengthening the bond between the first reinforcement bricks 10, second reinforcement bricks 20, rebar 30, and the existing wall, forming an integrated grid structure and further enhancing the reinforcement effect. Preferably, the grout has a fluidity greater than 300 mm, for example, ultra-fine cement can be used.

[0051] S4 Surface Repair: Cover the replacement area with a finishing layer and connect it to the exterior surface of the existing interior wall 1. Usually, a steel wire mesh mortar compatible with the original wall is used to restore the appearance consistency.

[0052] 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 of the existing inner wall 1, that is, toward the construction working surface.

[0053] The second reinforcement 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 of the existing inner wall 1, that is, towards the construction working surface.

[0054] The first reinforcement brick 10 replaces the bucket brick 2 in one layer of two bucket bricks 2 at the replacement position, and the second reinforcement brick 20 replaces the bucket brick 2 in one layer of one bucket brick 2 at the replacement position, and the first through groove 11 of the first reinforcement brick 10 and the second through groove 21 of the second reinforcement brick 20 located on one side of the second reinforcement brick 20 are connected up and down to form a vertical channel, and the first through groove 11 of the first reinforcement brick 10 and the third through groove 22 of the second reinforcement brick 20 located on the other side of the second reinforcement brick 20 are connected up and down to form another vertical channel.

[0055] At this point, the vertical channels are located outside the reinforcement bricks. Therefore, S2 replacement involves removing the bucket bricks 2 at the replacement location layer by layer, and replacing each bucket brick 2 with a corresponding first reinforcement brick 10 or second reinforcement brick 20. This approach ensures the stability of the existing wall during construction and improves construction safety. Furthermore, after the replacement is completed, a vertical channel is formed directly opposite the construction surface, with rebar 30 placed in each of the two vertical channels. Furthermore, this approach, incorporating two rebars 30 into the two vertical channels, further enhances the reinforcement effect.

[0056] See Figure 3-4 , Figure 3 This is a schematic structural diagram of the first reinforcement brick 10 in this application; Figure 4 This is a schematic structural diagram of the second reinforcement brick 20 in this application.

[0057] In one embodiment, first through grooves 11 are provided on two opposite sides of the first reinforcement brick 10 , and one of the two first through grooves 11 opens toward the outside of the existing inner wall 1 , while the other opens toward the inside of the existing inner wall 1 .

[0058] The second reinforcing brick 20 is provided with a second through groove 21 and a third through groove 22 on two opposite sides, and the openings of the second through groove 21 and the third through groove 22 on one side of the second reinforcing brick 20 are both facing 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 are both facing the inside of the existing inner wall 1.

[0059] At this point, four vertical channels are formed around the circumference of the reinforcement brick, namely, two on the inner side and two on the outer side, facing the construction work surface. Therefore, replacement S2 involves completely removing the bucket brick 2 at the replacement location, installing rebar 30 in the corresponding positions of the two vertical channels with openings facing the interior of the existing inner wall 1, then implanting the first or second reinforcement block, and then installing rebar 30 in the two vertical channels with openings facing the exterior of the existing inner wall 1.

[0060] This method provides steel bars 30 both inside and outside the reinforcement structure, forming a structure with four steel bars 30 in the circumferential direction, further improving the reinforcement effect.

[0061] In one embodiment, the thickness of the first reinforcement brick 10 and the second reinforcement brick 20 are both greater than the thickness of the bucket brick 2 and less than the difference between the length of the bucket brick 2 and its thickness, so that the reinforcement brick has a certain thickness, which is convenient for the setting of the through groove and ensures the strength of the reinforcement brick; at the same time, since the gap space between the reinforcement brick and the existing exterior wall becomes smaller, the amount of subsequent slurry injection can be reduced, the slurry curing is accelerated, and the construction period is shortened.

[0062] In one embodiment, the density of the first reinforcement brick 10 and the second reinforcement brick 20 is ≤800 kg / m 3 , strength ≥MU10 to ensure processing strength.

[0063] The standard bricks used for hollow wall masonry are usually 240mm×115mm×53mm. To facilitate construction, in a specific embodiment, the overall dimensions of the first reinforcement brick 10 and the second reinforcement brick 20 are both 240mm×115mm×177mm. The fixed dimensions facilitate construction and improve efficiency. At the same time, the gap between the reinforced structure and the existing exterior wall is small, avoiding a large amount of wet work (grouting) on site, further improving efficiency, and being more environmentally friendly.

[0064] Furthermore, the through grooves have dimensions of 15 mm×115 mm×40 mm, and use steel bars 30 with a diameter of 12 mm.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for internal replacement reinforcement of old masonry of a hollow wall, characterized in that: include: S1: selecting a replacement site, wherein the replacement site is located in the existing inner wall and extends along the height direction of the existing inner wall, and the replacement site includes multiple brick layers, and the multiple brick layers are alternately formed by two bucket bricks in one layer and one bucket brick in another layer; S2 replacement: removing the bucket bricks at the replacement location and inserting the first reinforcement bricks or the second reinforcement bricks and steel bars, wherein the first reinforcement bricks and the second reinforcement bricks are alternately arranged along the height direction of the existing inner wall and connected up and down to form a vertical channel, and steel bars are arranged in the vertical channel or in the corresponding position of the vertical channel; S3 grouting: filling the vertical channel and between the replacement part and the existing outer wall with slurry; S4 Surface repair: Cover the surface of the replacement part with a finishing layer and connect it with the outer surface of the existing inner wall.

2. The method for internal replacement and reinforcement of old masonry of a hollow wall 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 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 are both facing the outside of the existing inner wall; The first reinforcing brick replaces the bucket bricks in two bucket bricks in a layer of the replacement position, and the second reinforcing brick replaces the bucket brick in one bucket brick in a layer of the replacement position, and the first through groove of the first reinforcing brick and the second through groove of the second reinforcing brick on one side of the second reinforcing brick are vertically connected to form one vertical channel, and the first through groove of the first reinforcing brick and the third through groove of the second reinforcing brick on the other side of the second reinforcing brick are vertically connected to form another vertical channel; and The S2 replacement is as follows: the bucket bricks at the replacement position are removed layer by layer, and a first reinforcement brick or a second reinforcement brick is correspondingly implanted for each bucket brick removed, and steel bars are placed in the two vertical channels.

3. The method for internal replacement and reinforcement of old masonry of hollow wall according to claim 2, characterized in that: The first through grooves are provided on two opposite sides of the first reinforcing brick, and one of the two first through grooves opens toward the outside of the existing inner wall, and the other opens toward the inside of the existing inner wall; The second through groove and the third through groove are provided on two opposite sides of the second reinforcing brick, and the openings of the second through groove and the third through groove on one side of the second reinforcing brick are both oriented toward 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 are both oriented toward the inside of the existing inner wall; and S2 replacement is: completely remove the bucket bricks at the replacement position, set steel bars in the corresponding positions of the vertical channel with two openings facing the inside of the existing inner wall, implant the first reinforcement block or the second reinforcement block, and then set steel bars in the vertical channel with two openings facing the outside of the existing inner wall.

4. The method for internal replacement and reinforcement of old masonry of a hollow wall according to claim 1, characterized in that: The thickness of the first reinforcement brick and the second reinforcement brick are both greater than the thickness of the bucket brick and less than the difference between the length of the bucket brick and its thickness.

5. The method for internal replacement and reinforcement of old masonry of a hollow wall according to claim 1, characterized in that: The fluidity of the slurry is greater than 300 mm.

6. The method for internal replacement and reinforcement of old masonry of a hollow wall according to claim 1, characterized in that: The modified surface layer is a wire mesh mortar layer.

7. The method for internal replacement and reinforcement of old masonry of a hollow wall according to any one of claims 1 to 6, characterized in that: The density of the first reinforcement brick and the second reinforcement brick is ≤800kg / m 3 , strength ≥MU10.

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