Reinforcing structure for preventing differential settlement of building foundation
By setting inclined columns in the basement of the building, the increased local load is dispersed to areas where the load is not increased, the problem of uneven settlement of the building foundation is solved, and the stability and deformation resistance of the structure are improved.
Patent Information
- Application Number
- CN202421123738.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-22
AI Technical Summary
In building reconstruction projects, the foundations of old buildings are prone to uneven settlement after increasing load, resulting in structural cracking.
Set up an oblique column between the top frame beam of the basement and the bottom frame beam, and place the top of the oblique column towards the increased local load on the center side of the orthogonal projection of the sub-base frame beam. The increased local load is transferred to the range where new loads are not added by continuous oblique columns, dispersing the pressure of newly added local loads on the foundation.
The uniform stress at the basement is achieved, the deformation resistance of the overall basement structure is improved, the uneven settlement of the foundation is prevented, and the cracking of the overall structure is avoided.
Smart Images
Figure CN222456920U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of building structures, and more specifically, to a reinforcement structure for preventing uneven settlement of a building foundation. Background Art
[0002] With the development of economy, the demand for social buildings has increased dramatically, while the land is becoming increasingly scarce, which has led to a trend of adding floors to old buildings. According to the requirements for the beauty of buildings and the needs of functional use, new floors are often added to the local span range of the top. In addition, it is also common to install heavy equipment locally on old buildings. All of these have caused the burden on the original foundation of the old building to increase and disrupted the uniform balance of the foundation reaction force at the bottom of the original foundation.
[0003] In many cases, the total value of the foundation soil pressure within the building coverage area does not exceed the total bearing capacity limit, and the foundation bearing capacity in the area without additional load is sufficient, but the overpressure at the projection position of the increased load is in violation of the regulations. The above situation will cause uneven foundation settlement and cause structural cracks. Utility Model Content
[0004] In order to improve the integrity of the added structure, reduce the overall deformation of the structure, prevent cracking, and effectively disperse the local load increased by the upper structure to the non-increased load area, the utility model provides a reinforcement structure for preventing uneven settlement of the building foundation, which is applied to the reconstruction project of a building with a basement frame with increased local load, comprising an existing single-layer basement concrete frame body and a plurality of inclined columns; the existing single-layer basement concrete frame body comprises two or more frames arranged in parallel and evenly on the foundation, and each of the frames comprises a top frame beam, a bottom frame beam and a frame column connected between the top frame beam and the bottom frame beam; each of the inclined columns is arranged in a diagonal form between adjacent frame columns in the same frame; in the existing single-layer basement concrete frame body with concrete wall, the inclined column is closely attached to the concrete wall cast between the top frame beam, the bottom frame beam and the frame column and is connected to the concrete wall, and the top end of the inclined column faces the center of the positive projection of the increased local load on the top frame beam.
[0005] Preferably, for each frame having an increased local load above, the arrangement range of the inclined columns located on both sides of the center line of the increased local load is the same.
[0006] Preferably, the cross-sectional area of the inclined column whose distance from the increased local load to the orthographic projection of the existing single-layer basement concrete frame body is smaller than the cross-sectional area of the inclined column whose distance from the increased local load to the orthographic projection of the existing single-layer basement concrete frame body is larger.
[0007] Preferably, there is a position of an original concrete wall between the top frame beam, the bottom frame beam and the frame column, and when the frame column protrudes from the concrete wall, the inclined column is flush with the side surface of the frame column.
[0008] Preferably, the increased local load is a newly added floor or heavy equipment installed on any floor.
[0009] Compared with the prior art, the utility model sets an inclined column between the top frame beam and the bottom frame beam of the basement, and the top of the inclined column faces the increased local load on the central side of the positive projection of the second bottom frame beam. The continuous inclined columns will gradually transfer the increased local load to the range without the added new load, dispersing the pressure of the newly added upper local load on the foundation, thereby achieving uniform force on the bottom of the basement. It can improve the deformation resistance of the overall structure of the basement, prevent uneven settlement of the foundation, and avoid cracking of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 is an axial schematic diagram of a reinforcement structure for preventing uneven settlement of a building foundation according to an embodiment of the present application;
[0011] Figure 2 It is a schematic side view of a single-frame frame of a reinforcement structure for preventing uneven settlement of a building foundation according to an embodiment of the present application.
[0012] Description of Reference Numerals
[0013] 1. Existing basement concrete frame body; 11. Top frame beam; 12. Bottom frame beam; 13. Frame column; 14. Concrete wall; 2. Inclined column; 3. Upper building structure; 31. Original upper building structure; 32. Increased local load; 4. Original settlement line; 5. Settlement line after applying ground settlement reinforcement structure. DETAILED DESCRIPTION
[0014] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0015] like Figure 1 and Figure 2 As shown, the utility model discloses a reinforcement structure for preventing uneven settlement of a building foundation.
[0016] See also Figure 1The reinforcement structure for preventing uneven settlement of a building foundation of this embodiment is applied to a building reconstruction project with a basement frame with increased local load. The increased local load 32 may be a newly added floor or heavy equipment installed on any floor (such as a large machine in large industrial production). The reinforcement structure for preventing uneven settlement of a building foundation of this embodiment includes an existing single-layer basement concrete frame body 1 and a plurality of inclined columns 2.
[0017] The above-mentioned existing single-layer basement concrete frame body 1 is a reinforced concrete structure cast on the foundation at the initial stage of construction, which is used to realize the support of the entire building. Like the basement frame of a general building, the above-mentioned existing single-layer basement concrete frame body 1 includes two or more frames arranged in parallel and evenly on the foundation (each frame is located on the same plane), and each frame of the existing single-layer basement concrete frame body 1 includes a top frame beam 11, a bottom frame beam 12 and a frame column 13 connected between the top frame beam 11 and the bottom frame beam 12; each inclined column 2 is arranged in a diagonal form between a number of adjacent frame columns 13 in the same frame; in the existing single-layer basement concrete frame body 1 with a concrete wall surface 14, the inclined column 2 is closely attached to the concrete wall surface 14 cast between the top frame beam 11, the bottom frame beam 12 and the frame column 13 and is connected to the concrete wall surface 14, and the top end of the inclined column 2 faces the center of the positive projection of the increased local load 32 on the top frame beam 11.
[0018] The inclined column 2 is an additional structure, which must be constructed before adding local loads to the existing building. It is generally a reinforced concrete structure, but it can also be a steel structure. The above-mentioned reinforcement structure for preventing uneven settlement of the building foundation has essentially transformed the partial frame structure of the basement into a truss structure due to the addition of the inclined column 2. The bending moment borne by the original beam and column components is decomposed into axial force, which greatly enhances its ability to resist deformation and damage. The mechanical principles of the truss will not be elaborated here. The relevant content in the following text of this embodiment is based on this mechanical feature.
[0019] It should be emphasized that according to the aforementioned description of the inclination direction of the inclined column 2, the interior of the inclined column 2 is subjected to pressure. In the case where the inclined column 2 is a concrete column, the advantages of the concrete material are brought into play, and the anchoring of the longitudinal reinforcements at the upper and lower ends of the inclined column 2 at the corners of the frame beam and the column is simplified. The inclined column 2 is arranged in the basement, especially at the position of the outer wall, which minimizes the interference with its building function. The basement has a complete concrete roof and a thick bottom plate that is often integrated with the foundation. They are cast together with the top and bottom frame beams. They greatly disperse the new tension and pressure of the original frame beams without the need to reinforce them, which significantly saves costs.
[0020] This avoids the situation where the local force imbalance of the bottom frame beam 12 caused by the increase of local load, which in turn causes the original settlement line 4 of the foundation in the area with greater force to move downward, while the original settlement line 4 of the foundation in other areas moves upward. The settlement line 5 after the application of the ground settlement reinforcement structure can still remain horizontal after the local load is increased, thereby improving the stability of the overall building structure when the local load is increased.
[0021] Specifically, to determine whether the foundation pressure exceeds the bearing capacity, the location where the inclined column 2 needs to be added, and the precise determination of the specific cross-sectional dimensions of the inclined column 2 at each location, three-dimensional finite element method software can be used to take into account the later added load, consider the compression modulus of the foundation soil, and comprehensively consider the interaction between the foundation soil, foundation, and superstructure to make the pressure at the bottom of the foundation still relatively uniform, avoid uneven settlement, and achieve the expected indicators.
[0022] In one embodiment of the utility model, for each frame with an increased local load 32 above, the arrangement range of the inclined columns 2 on both sides of the center line of the increased local load 32 is the same, so that the inclined columns 2 can evenly decompose the bending moment borne by the original beam and column components, and the single frame and the inclined columns 2 in the existing single-layer basement concrete frame body 1 are cross-arranged along two mutually perpendicular directions on the ground plane.
[0023] In one embodiment of the utility model, the cross-sectional area of the inclined column 2 whose distance from the increased local load 32 to the orthographic projection of the existing single-layer basement concrete frame body 1 is smaller than the cross-sectional area of the inclined column 2 whose distance from the increased local load 32 to the orthographic projection of the existing single-layer basement concrete frame body 1 is larger than the cross-sectional area of the inclined column 2 whose distance from the increased local load 32 to the orthographic projection of the existing single-layer basement concrete frame body 1 is larger. Because the inclined column 2 closer to the local load side is subjected to greater force, the cross-sectional area is set larger than that of the inclined column 2 farther away from the local load, which can effectively transmit the axial force and improve the structural stability of the inclined column 2.
[0024] In one embodiment of the utility model, there is a position of the original concrete wall 14 between the top frame beam 11, the bottom frame beam 12, and the frame column 13. When the frame column 13 protrudes from the concrete wall 14, the inclined column 2 is flush with the side surface of the frame column 13 (a flat column can be used). Therefore, while ensuring the surface consistency of the inclined column 2 and the bottom frame column 13, it will not affect the use of the basement space, thereby improving the effective utilization of the basement space.
[0025] In one embodiment of the present invention, the increased local load 32 is a newly added floor or heavy equipment installed on any floor or other actions that increase pressure on the top plate. Therefore, this reinforced structure can meet various reasonable indicators of the structure when increasing local loads.
[0026] The above are only preferred specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A reinforcement structure for preventing uneven settlement of building foundations, applied to reconstruction projects of buildings with basement frames with increased local loads, characterized in that: It comprises an existing single-layer basement concrete frame body and a plurality of inclined columns; the existing single-layer basement concrete frame body comprises two or more frames arranged in parallel and evenly on a foundation, and each of the frames comprises a top frame beam, a bottom frame beam and a frame column connected between the top frame beam and the bottom frame beam; each of the inclined columns is arranged in a diagonal form between adjacent frame columns in the same frame; in the existing single-layer basement concrete frame body with a concrete wall, the inclined columns are closely attached to the concrete wall cast between the top frame beam, the bottom frame beam and the frame columns and are connected to the concrete wall, and the top end of the inclined column faces the center of the positive projection of the increased local load on the top frame beam.
2. The reinforcement structure for preventing uneven settlement of a building foundation according to claim 1 is characterized in that: For each frame having an increased local load above, the arrangement range of the inclined columns located on both sides of the center line of the increased local load is the same.
3. The reinforcement structure for preventing uneven settlement of a building foundation according to claim 1, characterized in that: The cross-sectional area of the inclined column whose distance from the increased local load to the positive projection of the existing single-layer basement concrete frame body is smaller than the cross-sectional area of the inclined column whose distance from the increased local load to the positive projection of the existing single-layer basement concrete frame body is larger.
4. The reinforcement structure for preventing uneven settlement of a building foundation according to claim 1, characterized in that: There is a position of the original concrete wall between the top frame beam, the bottom frame beam and the frame column. When the frame column protrudes from the concrete wall, the inclined column is flush with the side surface of the frame column.
5. The reinforcement structure for preventing uneven settlement of a building foundation according to claim 1, characterized in that: Increased local loads are additional floors or heavy equipment installed on any floor.