Reinforcement structure and method for reinforcement structure of masonry wall foundation of existing building
By using a combination of concrete protective layer and concrete wall in the reinforcement of existing masonry wall foundations, the problems of complex and low stability of existing reinforcement methods are solved, and the compressive bearing capacity and overall stability are improved.
Patent Information
- Application Number
- CN202211562389.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-12-07
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2042-12-07
AI Technical Summary
Existing reinforcement methods for masonry wall foundations are complex and have low stability, failing to effectively improve seismic performance.
A combined reinforcement structure of concrete cover and concrete wall is adopted, which includes covering both sides of the lower wall of the masonry wall with concrete cover and embedding longitudinal bars inside the lower wall to form a reinforced concrete structure. Then, a concrete wall is poured at the top of the lower wall to replace the upper wall.
Without damaging the original foundation structure, it improves the compressive bearing capacity and overall stability of the masonry wall foundation, and the construction is simple, low-cost, and has a short construction period.
Smart Images
Figure CN115822300B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of building construction, in particular to a reinforcing structure and method for the foundation of an existing building masonry wall. BACKGROUND
[0002] With the progress of society and the increasing improvement of people's living standards, many existing building masonry wall foundations have been unable to meet people's needs. In an earthquake, buildings with poor seismic performance of masonry wall foundations threaten people's lives and property safety. If the buildings are demolished and rebuilt, the construction period will greatly increase, and the construction cost will also greatly increase. However, the reconstruction and reinforcement of the old house foundation has the following advantages compared with the foundation structure of the newly built building: short construction period, convenient construction, and low cost. Therefore, the existing masonry wall reinforcement method is relatively complex and has low stability. SUMMARY
[0003] In view of the above-mentioned deficiencies in the prior art, the present application provides a reinforcing structure and method for the foundation of an existing building masonry wall, which solves the technical problem of the prior art that the masonry wall reinforcement method is relatively complex and has low stability.
[0004] In a first aspect, the present application discloses a reinforcing structure for the foundation of an existing building masonry wall, comprising a concrete protective layer fixed on both sides of the lower wall of the masonry wall, and a concrete wall fixed on the top end of the lower wall and the top end of the concrete protective layer to replace the upper wall of the masonry wall. The concrete protective layer is a reinforced concrete structure, the main reinforcement in the concrete protective layer extends upward into the concrete wall, and the longitudinal reinforcement of the concrete protective layer is implanted into the interior of the lower wall.
[0005] The reinforcing structure for the foundation of an existing building masonry wall further improves in that at least one concrete structural column is arranged in the concrete wall.
[0006] The reinforcing structure for the foundation of an existing building masonry wall further improves in that the outer side of the concrete wall is flush with the outer side of the concrete protective layer on both sides of the lower wall.
[0007] The reinforcing structure for the foundation of an existing building masonry wall further improves in that the depth of the longitudinal reinforcement of the concrete protective layer implanted into the masonry wall is not less than 150 mm, and the length of the longitudinal reinforcement of the concrete protective layer outside the masonry wall is not less than 200 mm.
[0008] The reinforcing structure for the foundation of an existing building masonry wall further improves in that the distance between adjacent longitudinal reinforcements of the concrete protective layer is not greater than 300 mm.
[0009] The further improvement of the existing building masonry wall foundation reinforcing structure is that the bottom end of the lower wall body is fixed with a masonry wall foundation, and the bottom end of the concrete protective layer is fixed with a concrete cushion layer corresponding to the position of the masonry wall foundation.
[0010] The further improvement of the existing building masonry wall foundation reinforcing structure is that the thickness of the concrete cushion layer is not less than 120 mm.
[0011] In the second aspect, the application further provides an existing building masonry wall foundation reinforcing method, which comprises the following steps: removing the upper wall body of the masonry wall; embedding longitudinal reinforcement of a concrete protective layer on both sides of the lower wall body of the masonry wall, and fixing the main reinforcement of the concrete protective layer on the longitudinal reinforcement of the concrete protective layer, and extending the main reinforcement of the concrete protective layer out of the lower wall body; covering and pouring the concrete protective layer on both sides of the lower wall body, and pouring the longitudinal reinforcement and the main reinforcement together to form a reinforced concrete structure; pouring a concrete wall body on the top of the lower wall body and the top of the concrete protective layer, and replacing the removed upper wall body with the concrete wall body.
[0012] Compared with the prior art, the application has positive and obvious effects. The application solves the technical problems of the prior art, i.e., the masonry wall reinforcing method is relatively complex and has low stability, by reinforcing the combination of the concrete protective layer and the concrete wall body. The reinforcing structure of the application improves the compressive bearing capacity of the masonry wall foundation without damaging the original foundation structure, and has simple structure and convenient construction. BRIEF DESCRIPTION OF DRAWINGS
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description only show some embodiments of the application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor.
[0014] Figure 1 It is a vertical sectional view of the existing building masonry wall foundation reinforcing structure of the application.
[0015] Figure 2 It is a horizontal sectional view of the existing building masonry wall foundation reinforcing structure of the application at the position of the masonry wall. DETAILED DESCRIPTION
[0016] The technical solutions in the embodiments of the application will be described clearly and completely in the following with reference to the drawings of the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, but not all the embodiments. Based on the embodiments of the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.
[0017] As shown in Figure 1 and Figure 2 , the present application provides a reinforcement structure for masonry wall foundation, which comprises concrete protection layers 2 fixed on both sides of the lower wall 1 of the masonry wall, and a concrete wall 4 for replacing the upper wall of the masonry wall and fixed on the top end of the lower wall 1 and the top end of the concrete protection layer 2, the concrete protection layer 2 is a reinforced concrete structure, the main reinforcement 7 in the concrete protection layer 2 extends into the concrete wall 4, and the longitudinal reinforcement 6 of the concrete protection layer 2 is embedded into the lower wall 1. In this embodiment, the main reinforcement 7 is hot-rolled ribbed steel C16 hot-rolled ribbed steel (HRB400 grade, diameter 16 mm). The strength grade of the concrete protection layer 2 is C30 concrete. The reinforcement structure of the present application further replaces the upper half part with a concrete structure while retaining the masonry wall foundation, greatly improving the bearing capacity of the masonry wall.
[0018] Preferably, at least one concrete structure column 5 is arranged in the concrete wall 4. The main reinforcement 7 in the concrete structure column 5 is directly embedded in the cast-in-place concrete wall 4 and extends to the position of the concrete structure column 5. In this embodiment, the specification of the main reinforcement 7 in the concrete structure column 5 is C25 hot-rolled ribbed steel (HRB400 grade, diameter 25 mm), and the concrete strength grade of the concrete structure column 5 is C30.
[0019] Preferably, the concrete wall 4 is flush with the outer side of the concrete protection layer 2 on both sides of the lower wall 1. The main reinforcement 7 and the longitudinal reinforcement 6 of the concrete wall 4 are tied together, and the main reinforcement 7 of the concrete structure column is anchored into the concrete wall 4 by 500 mm, which plays a role in forming an integral whole and improves the stability and bearing capacity of the masonry wall.
[0020] Preferably, the depth of the longitudinal reinforcement of the concrete protection layer embedded in the lower wall 1 is not less than 150 mm, and the length of the longitudinal reinforcement of the concrete protection layer outside the lower wall 1 is not less than 200 mm. The outer end of the longitudinal reinforcement 6 is provided with a 5d right-angled elbow, so that the concrete is fully wrapped around the longitudinal reinforcement 6, thereby forming an integral whole with the longitudinal reinforcement 6 and improving the overall strength.
[0021] Preferably, the distance between the longitudinal reinforcements 6 adjacent to the concrete protection layer 2 is not greater than 300 mm, so as to ensure the strength of the concrete protection layer 2.
[0022] Preferably, the bottom end of the lower wall 1 is fixed with a masonry wall foundation, and the concrete protection layer 2 corresponds to the position of the masonry wall foundation and is a concrete cushion layer 3. The concrete cushion layer 3 can also be poured with concrete of strength grade C20 to save cost.
[0023] Preferably, the thickness of the concrete cushion 3 is not less than 120mm, so as to ensure the strength of the concrete cushion 3 and improve the stability of the whole reinforcing structure.
[0024] In another aspect, the present application also provides a method for reinforcing the foundation of a masonry wall of an existing building, comprising the following steps: removing the upper wall of the masonry wall; embedding longitudinal reinforcement 6 of the concrete protective layer 2 on both sides of the lower wall 1 of the masonry wall, and fixing the main reinforcement 7 of the concrete protective layer on the longitudinal reinforcement 6 of the concrete protective layer 2, and extending the main reinforcement 7 of the concrete protective layer 2 out of the lower wall 1 upward; covering and pouring the concrete protective layer 2 on both sides of the lower wall 1, and pouring the longitudinal reinforcement and the main reinforcement together to form a reinforced concrete structure; pouring the concrete wall 4 on the top of the lower wall 1 and the top of the concrete protective layer 2, and replacing the removed upper wall with the concrete wall 4.
[0025] The reinforcing method is convenient to construct, short in construction period, and low in cost, and can improve the integrity and anti-collapse ability of the building structure without damaging the original structure, and can be used for a long time. Not only the long-term use effect is achieved, but also the existing building is stably fixed.
[0026] The present application solves the technical problems of the prior art that the reinforcing method of the masonry wall is relatively complex and the stability is low by the combination of the concrete protective layer and the concrete wall. The reinforcing structure of the present application improves the compression bearing capacity of the masonry wall foundation without damaging the original foundation structure, and is simple in structure and convenient to construct.
[0027] The parts not involved in the present application are the same as or can be realized by the prior art. The above description is only the preferred embodiments of the present application, and does not limit the present application in any form. Although the present application has been disclosed as the preferred embodiments, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical contents to make equivalent embodiments with equivalent changes, but as long as the changes do not deviate from the technical solution of the present application, any simple modification, equivalent change and modification of the above embodiments based on the technical essence of the present application are still within the scope of the technical solution of the present application.
Claims
1. A reinforcement structure for the foundation of masonry walls in existing buildings, characterized in that, It includes a concrete protective layer covering both sides of the lower wall fixed to the masonry wall, and a concrete wall that replaces the masonry wall and is fixed to the top of the lower wall and the top of the concrete protective layer. The concrete protective layer is a reinforced concrete structure, and the main reinforcement in the concrete protective layer extends upward into the concrete wall. The longitudinal reinforcement in the concrete protective layer is embedded into the interior of the lower wall. The concrete wall contains at least one concrete structural column; the main reinforcement bars in the concrete structural column are directly embedded in the cast-in-place concrete wall and extend to the position of the concrete structural column.
2. The existing building masonry wall foundation reinforcement structure according to claim 1, characterized in that, The concrete wall and the concrete protective layer on both sides of the lower wall are flush with each other on the outer side.
3. The existing building masonry wall foundation reinforcement structure according to claim 1, characterized in that, The longitudinal reinforcement of the concrete protective layer is embedded to a depth of not less than 150mm into the lower wall, and the longitudinal reinforcement of the concrete protective layer is at least 200mm long outside the lower wall.
4. The existing building masonry wall foundation reinforcement structure according to claim 1, characterized in that, The distance between the longitudinal reinforcement bars of adjacent concrete protective layers shall not exceed 300mm.
5. The existing building masonry wall foundation reinforcement structure according to claim 1, characterized in that, The bottom of the lower wall is fixed with a masonry wall foundation, and the bottom of the concrete protective layer is fixed with a concrete pad corresponding to the position of the masonry wall foundation.
6. The existing building masonry wall foundation reinforcement structure according to claim 5, characterized in that, The thickness of the concrete cushion layer shall not be less than 120 mm.
7. A construction method for reinforcing the foundation of a masonry wall in an existing building as described in claim 1, characterized in that, Includes the following steps: Demolish the upper part of the masonry wall; Longitudinal reinforcement bars for concrete cover are inserted on both sides of the lower part of the masonry wall, and main reinforcement bars for concrete cover are fixed on the longitudinal reinforcement bars for concrete cover, with the main reinforcement bars for concrete cover extending upward out of the lower part of the wall. A concrete protective layer is poured on both sides of the lower wall, and the longitudinal reinforcement and the main reinforcement are poured together to form a reinforced concrete structure. The main reinforcement bars and longitudinal reinforcement bars of the concrete wall are tied together, and the main reinforcement bars of the concrete structural column are anchored into the concrete wall. A concrete wall is poured on top of the lower wall and the concrete protective layer, replacing the demolished upper wall.