A method for reinforcing the brick gable wall of an old factory building

Abstract

This invention discloses a method for reinforcing the brick gable wall of an old factory building, belonging to the field of building construction technology. The technical solution is as follows: Repairing the original brick wind-resistant columns and gable wall cross-section; demolishing the top of the gable wall to below the truss elevation and constructing a new horizontal beam; extending the original brick wind-resistant columns to the top of the gable wall, with a pad block at the top of the wind-resistant columns and integrally cast with the newly constructed horizontal beam at the top of the gable wall; encasing the original brick wind-resistant columns in concrete starting 1000mm below the top; excavating the original gable wall foundation, ensuring it does not exceed the gable wall base elevation, and filling and compacting it; adding a raft foundation at the doorway; constructing new columns of the same length as the original brick wind-resistant columns inside the factory building, adjacent to the original brick wind-resistant columns, and constructing structural columns of the same length as the original brick wind-resistant columns outside the factory building, adjacent to the original brick wind-resistant columns; constructing a first beam at the original doorway with the bottom elevation matching the original doorway top elevation, and a second beam with the top elevation matching the new column top elevation. The beneficial effect of this invention is that it provides a method for reinforcing the brick gable wall of an old factory building.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and specifically relates to a method for reinforcing the brick gable wall of an old factory building. Background Technology

[0002] With rapid socio-economic development and the continuous expansion of urban areas, the renovation of old factories is becoming increasingly common across the country. As carriers of the industrial culture of the older generation, the design concept of restoring 20th-century factories to their original state and preserving their original appearance has gradually become mainstream.

[0003] With the continuous development of urban construction, some existing old factory buildings can no longer meet current usage requirements and need to be renovated. The first step is to conduct safety assessments and reinforce any structural components that do not meet the requirements. In the actual safety assessment process, the brick gable walls of old factory buildings often lack integrity and adequate seismic structural measures.

[0004] To address the problem of insufficient integrity and seismic resistance of brick gable walls in old factory buildings, which makes it impossible to preserve their original state, a reinforcement method has been found that can solve the problem of insufficient integrity and seismic resistance of brick gable walls in old factory buildings and is applicable to brick structures in old factory buildings. Summary of the Invention

[0005] The purpose of this invention is to provide a method for reinforcing the brick gable walls of old factory buildings. By adding a raft foundation, columns, and beams to the doorway of the brick gable wall of the old factory building and connecting them to the gable wall, and extending the brick wind-resistant columns to the top of the gable wall, the overall integrity of the old factory building is improved. The process is simple, convenient to construct, and significantly improves the seismic bearing capacity of the gable wall.

[0006] This invention is achieved through the following measures: a method for reinforcing the brick gable wall of an old factory building, characterized by comprising:

[0007] Repair of original brick wind-resistant columns and brick gable wall sections;

[0008] The top of the gable wall was demolished to below the truss elevation and a new horizontal beam was constructed.

[0009] The original brick wind-resistant columns of the gable wall are continued to the top of the gable wall. The top of the brick wind-resistant columns is equipped with pads and is integrally cast with the newly built horizontal beam at the top of the gable wall.

[0010] Starting 1000mm below the top of the original brick wind-resistant column, a concrete sleeve is wrapped around it from the outside upwards;

[0011] The original gable wall foundation should be excavated, but not over-excavated below the gable wall base elevation, and then filled and compacted.

[0012] A new raft foundation was added at the doorway;

[0013] Inside the factory building, new columns of the same length as the original brick wind-resistant columns are installed close to the original brick wind-resistant columns. Outside the factory building, structural columns of the same length as the original brick wind-resistant columns are installed close to the original brick wind-resistant columns.

[0014] A first beam with the same bottom elevation as the original doorway is installed at the original doorway location, and a second beam with the same top elevation as the newly added column is installed at the original doorway location.

[0015] Furthermore, the top of the gable wall is demolished to below the truss elevation and a new horizontal beam is constructed, specifically as follows:

[0016] The top of the gable wall is removed to 240mm below the truss elevation. The top of the newly built horizontal beam is at the same elevation as the top of the truss, with the same slope and the same width as the gable wall thickness.

[0017] The pad block is 240mm thick and equipped with a double-layer bidirectional steel mesh. The steel mesh is anchored into the newly built horizontal beam, with the anchoring length being the same as the wall thickness. The strength grade of the bricks and the strength grade of the mortar used in the continued construction are the same as those of the original structure.

[0018] Furthermore, the outer concrete sleeve extends 80mm beyond the original brick wind-resistant column, and is tied with closed stirrups or U-shaped bars. The holes for the reinforcing bars to pass through the wall are filled with structural adhesive specifically for rebar installation.

[0019] Furthermore, the original gable wall foundation excavation must not exceed the gable wall base elevation, and the excavation must be filled and compacted, including:

[0020] After cleaning the soil particles from the sides of the brick gable wall foundation, C15 concrete is poured and compacted on each side within the height range, with a thickness of not less than 200mm.

[0021] The area within 500mm of the brick gable wall foundation should be backfilled with 2:8 lime-soil mixture, while the area beyond 500mm should be compacted with plain soil.

[0022] Backfill soil should be compacted in layers, with each layer not exceeding 300mm and a compaction coefficient not less than 0.94.

[0023] Furthermore, a new raft foundation is added at the doorway, including:

[0024] The thickness of the bedding layer for the newly added raft foundation is 150mm, and the concrete strength grade of the bedding layer is C20.

[0025] The new raft foundation extends 100mm beyond the foundation on each side;

[0026] The width of the raft foundation is the same as the width of the doorway, and its length extends 1350mm beyond the wall. The foundation beam should extend to the original brick wind-resistant column.

[0027] Furthermore, the structural columns are connected to the new columns at 600mm intervals by tie bars, and the holes for the rebars to pass through the wall are filled with structural adhesive for rebar installation, with an anchorage length of 300mm.

[0028] For newly added columns and structural columns, the stirrups should be reinforced within a range of 500mm above the top of the foundation and 500mm below the bottom of the newly added frame beams (first beam and second beam).

[0029] Furthermore, the foundation beam underframe should be placed on top of the raft foundation underframe.

[0030] Furthermore, it also includes pouring and curing. Before pouring, the concrete is rinsed clean with pressurized water, fully moistened, and then poured with C30 fine aggregate concrete to make it dense.

[0031] Furthermore, the upper and lower lap joints of the closed stirrups are welded on one side and the length is greater than 10 times the outer diameter of the stirrup.

[0032] The beneficial effects of the technical solution provided by this invention are as follows: The successful application of this reinforcement method has created a brand-new construction method for the reinforcement of similar brick gable walls, improving the overall integrity of old factory buildings. The process is simple, convenient, and significantly improves the seismic bearing capacity of the gable walls. This construction method is applicable to the reinforcement of brick gable walls in old factory buildings, and is especially suitable for the reinforcement of brick gable walls in urban renewal projects such as factory renovation. Attached Figure Description

[0033] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings listed below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a flowchart of a method for reinforcing the brick gable wall of an old factory building according to an embodiment of the present invention;

[0035] Figure 2 This is a detailed drawing (U-shaped reinforcement) of the top of the brick wind-resistant column in an embodiment of the present invention.

[0036] Figure 3 This is a detailed drawing of the top extension and reinforcement of the brick wind-resistant column (closed stirrups) in an embodiment of the present invention.

[0037] Figure 4 This is a detailed drawing of the brick wind-resistant column top pad block in an embodiment of the present invention;

[0038] Figure 5 This is a diagram of the newly added column foundation for the brick gable wall reinforcement in an embodiment of the present invention;

[0039] Figure 6 This is a diagram of the foundation of the brick gable wall reinforcement structural column in an embodiment of the present invention;

[0040] Figure 7 These are the reinforcement diagrams for the newly added columns and structural columns in this embodiment of the invention;

[0041] Figure 8 This is a schematic diagram of the reinforcement and tie bars of the newly added columns and structural columns in this embodiment of the invention;

[0042] Figure 9 This is a schematic diagram of the internal reinforcement of the newly added columns and structural columns in this embodiment of the invention;

[0043] Figure 10 The diagram shows the newly added beam for the reinforcement of the brick gable wall in this embodiment of the invention.

[0044] The components represented by each number in the attached diagram are as follows: 1. Gable wall; 2. Concrete sleeve; 4. New horizontal beam; 5. Spacer block; 6. Original brick wind-resistant column; 7. New raft foundation; 8. New column; 9. Structural column; 10. Tie reinforcement; 11. Second beam; 201. U-shaped reinforcement; 202. Vertical main reinforcement; 203. Closed stirrups; 801. Reinforcement inside the new column; 901. Reinforcement inside the structural column. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0046] See Figures 1-10 A method for reinforcing the brick gable wall of an old factory building, the implementation of which is as follows:

[0047] A. Repair of the original brick wind-resistant column 6 and gable wall section 1

[0048] The damaged sections of the original brick wind-resistant column 6 and gable wall 1 were repaired by pouring C20 fine stone concrete.

[0049] B. Construction of the concrete horizontal beam at the top of the gable wall.

[0050] The top of gable wall 1 is removed to 240mm below the truss elevation, and a new horizontal beam 4 is built on top. The top of the new horizontal beam 4 is at the same elevation as the top of the truss, with the same slope and the same width as the thickness of gable wall 1.

[0051] C. The original brick wind-resistant column was extended at the top.

[0052] The original brick wind-resistant column 6 is extended to the top of the gable wall 1. A pad block 5 is installed on the top of the brick wind-resistant column and is poured integrally with the newly built horizontal beam 4 at the top of the gable wall 1. The thickness of the top pad block 5 is 240mm, and it is equipped with a C8@100 double-layer bidirectional steel mesh. The steel mesh is anchored into the concrete horizontal beam, and the anchoring length is the same as the wall thickness. The strength grade of the bricks and the strength grade of the mortar used in the extension are the same as those of the original structure.

[0053] D. Reinforcement of the top of the original brick wind-resistant column 6

[0054] The top of the brick wind-resistant column is encased in a concrete sleeve 2, starting 1000mm below the original brick column top. The encasing concrete is C30 fine aggregate concrete. The concrete sleeve 2 extends 680mm beyond the original brick wind-resistant column, and is secured with closed stirrups 203 or U-shaped bars 201 at 400mm intervals. Figure 2 and Figure 3 As shown, the interior contains vertical main reinforcement bars 202, and the holes for the reinforcement bars to pass through the wall are filled with structural adhesive specifically for rebar installation.

[0055] E. Excavation and treatment of the original gable wall foundation.

[0056] During foundation construction, the condition of the brick gable wall 1 (including the brick wind-resistant column) foundation should be observed while excavating, and excavation should not exceed the base elevation of brick gable wall 1. After cleaning the soil particles from the sides of the brick gable wall 1 foundation, C15 concrete should be poured and compacted on each side within a certain height range, with a thickness of not less than 200mm. The area within 500mm outside this should then be backfilled with 2:8 lime-soil mixture. Beyond 500mm, plain soil can be compacted. The backfill should be compacted in layers, with each layer not exceeding 300mm, and a compaction coefficient of not less than 0.94.

[0057] F. Construction of the new raft foundation 7

[0058] The newly added raft foundation 7 (including foundation beams) has a 150mm thick cushion layer with a C20 concrete strength grade, extending 100mm beyond the foundation on each side. The newly added raft foundation has a C30 strength grade. The width of the raft foundation is the same as the width of the doorway, and its length extends 1350mm beyond the wall. The foundation beams should extend to the brick wind-resistant columns.

[0059] G. Construction of new column 8 and structural column 9

[0060] The newly added column 8 is located adjacent to the original brick wind-resistant column of the factory building, with the same length. A structural column 9 is installed outside the factory building, connected to the newly added column 8 at 600mm intervals via tie bars 10. The holes for the rebars penetrating the wall are filled with structural adhesive specifically for rebar installation, with an anchorage length of 300mm. The newly added column 8 and structural column 9 have their stirrups reinforced within a range of 500mm above the top of the foundation (up to +0.5) and 500mm below the bottom of the newly added frame beams (first and second beams). Figures 7-9 As shown, the newly added internal steel bars 801 and internal steel bars 901 of the structural columns are included.

[0061] H. Construction of New Beams

[0062] The bottom elevation of the first beam is the same as the top elevation of the original doorway, and the top elevation of the second beam (11) is the same as the top elevation of the newly added column (8). The beam cross-section dimensions are 300×400mm.

[0063] I. Pouring and Curing

[0064] Before pouring, rinse thoroughly with pressurized water, fully moisten, and then pour C30 fine aggregate concrete to compact it, followed by proper curing.

[0065] Strict construction procedure control and technical briefing are strong guarantees for improving construction quality. This construction method was successfully applied to the reinforcement of the old factory building's brick gable wall 1 in the South Canal (Dezhou Section) Cultural Protection, Inheritance and Utilization Project - Degong Cultural and Creative Park Project. The South Canal (Dezhou Section) Cultural Protection, Inheritance and Utilization Project - Degong Cultural and Creative Park Project is located in Decheng District, Dezhou City, Shandong Province, bordered by Dongfeng West Road to the north, the canal embankment road to the east, Yangjiaquan Village to the south, and the South Canal to the west. New buildings were incorporated into the existing old factory buildings, and the old factory building's brick gable wall 1 reinforcement technology was adopted. This achieved the reinforcement objective, accelerated the construction progress, and successfully completed the project according to the owner's schedule requirements, with excellent construction results. During the construction process, the South Canal (Dezhou Section) Cultural Protection, Inheritance and Utilization Project - Degong Cultural and Creative Park Project, targeting the characteristics of this type of brick gable wall 1, developed a reinforcement construction technology for the old factory building's brick gable wall 1 through expert discussions and team innovation. This effectively solved construction difficulties and has significant promotional value.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for reinforcing the brick gable wall of an old factory building, characterized in that, include: Repair of original brick wind-resistant columns and gable wall sections; The top of the gable wall was demolished to below the truss elevation and a new horizontal beam was constructed. The original brick wind-resistant columns of the gable wall are continued to the top of the gable wall. The top of the brick wind-resistant columns is equipped with pads and is integrally cast with the newly built horizontal beam at the top of the gable wall. Starting 1000mm below the top of the original brick wind-resistant column, a concrete sleeve is wrapped around it from the outside upwards; The original gable wall foundation should be excavated, but not over-excavated below the gable wall base elevation, and then filled and compacted. A new raft foundation was added at the doorway; Inside the factory building, new columns of the same length as the original brick wind-resistant columns are installed close to the original brick wind-resistant columns. Outside the factory building, structural columns of the same length as the original brick wind-resistant columns are installed close to the original brick wind-resistant columns. A first beam with the same bottom elevation as the original doorway is installed at the original doorway location, and a second beam with the same top elevation as the newly added column. The top of the gable wall is demolished to below the truss elevation and a new horizontal beam is constructed, specifically as follows: The top of the gable wall is removed to 240mm below the truss elevation. The top of the newly built horizontal beam is at the same elevation as the top of the truss, with the same slope and the same width as the gable wall thickness. The original gable wall foundation must be excavated, but not over-excavated below the gable wall base elevation, and then filled and compacted, including: After cleaning the soil particles from the sides of the brick gable wall foundation, C15 concrete is poured and compacted on each side within the height range, with a thickness of not less than 200mm. The area within 500mm of the brick gable wall foundation should be backfilled with 2:8 lime-soil mixture, while the area beyond 500mm should be compacted with plain soil. Backfill soil should be compacted in layers, with each layer not exceeding 300mm and a compaction coefficient not less than 0.94; The structural columns are connected to the new columns at 600mm intervals by tie bars. The holes for the rebars to pass through the wall are filled with structural adhesive for rebar installation, and the anchorage length is 300mm. For newly added columns and structural columns, the stirrups should be reinforced within a range of 500mm above the top of the foundation and 500mm below the bottom of the newly added frame beams.

2. The method for reinforcing the brick gable wall of an old factory building according to claim 1, characterized in that, The pad block is 240mm thick and equipped with a double-layer bidirectional steel mesh. The steel mesh is anchored into the newly built horizontal beam, with the anchoring length being the same as the wall thickness. The strength grade of the bricks and the strength grade of the mortar used in the continued construction are the same as those of the original structure.

3. The method for reinforcing the brick gable wall of an old factory building according to claim 1, characterized in that, The outer concrete sleeve extends 80mm beyond the original brick wind-resistant column, and is tied with closed stirrups or U-shaped bars. The holes for steel bars to pass through the wall are filled with structural adhesive for steel bar installation.

4. The method for reinforcing the brick gable wall of an old factory building according to claim 1, characterized in that, A new raft foundation was added at the doorway, including: The thickness of the bedding layer for the newly added raft foundation is 150mm, and the concrete strength grade of the bedding layer is C20. The new raft foundation extends 100mm beyond the foundation on each side; The width of the raft foundation is the same as the width of the doorway, and its length extends 1350mm beyond the wall. The foundation beam should extend to the original brick wind-resistant column.

5. The method for reinforcing the brick gable wall of an old factory building according to claim 4, characterized in that, The foundation beam underframe should be placed on top of the raft foundation underframe.

6. The method for reinforcing the brick gable wall of an old factory building according to claim 1, characterized in that, It also includes pouring and curing. Before pouring, the concrete is rinsed with pressurized water and thoroughly moistened before being poured with C30 fine aggregate concrete to make it dense.

7. The method for reinforcing the brick gable wall of an old factory building according to claim 3, characterized in that, The upper and lower lap joints of the closed stirrups are welded on one side and the length is greater than 10 times the outer diameter of the stirrup.

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