Foundation reinforcing structure of existing high-rise building
By combining grouting technology and anchor static pile method, using segmented construction and limit angle steel structures, the space limitation problem of high-rise buildings in weak soil areas is solved, and efficient foundation reinforcement and Improve bearing capacity.
Patent Information
- Application Number
- CN202323489621.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2033-12-21
AI Technical Summary
In areas with thicker weak soil layers, the foundation reinforcement of existing high-rise buildings requires longer anchor static piles or a larger number, resulting in limited construction space and affecting building operations.
Combining grouting technology and anchor static pile method, the segmented construction technology and limited angle steel, protective angle steel and other structures are adopted. Through the assembly of steel pipe segments and grouting pipes, the foundation reinforcement in a narrow space is achieved and the load bearing is improved. and reduce material usage.
The foundation reinforcement of high-rise buildings in a narrow space has been achieved, which has improved the single pile bearing capacity of anchor static press piles, reduced the amount of steel pipes, reduced the impact of construction on daily operations, and improved the reinforcement effect.
Smart Images
Figure CN222140149U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building engineering, in particular to a foundation reinforcement structure of an existing high-rise building. Background Art
[0002] There are few existing high-rise building foundation reinforcement methods, and anchor static pressure piles are generally used. However, in areas with thick soft soil layers, longer piles or more piles are required to meet the design bearing capacity requirements. However, during the use of existing high-rise buildings, the space available for construction is often very small, and construction often affects the daily operation of high-rise buildings. Summary of the invention
[0003] The purpose of the utility model is to provide a foundation reinforcement structure for an existing high-rise building in accordance with the above-mentioned deficiencies of the prior art, which combines grouting technology with the anchor static pressure pile method to improve the single pile bearing capacity of the anchor static pressure pile, and at the same time adopts a segmented construction process to achieve the foundation reinforcement of an existing high-rise building in a narrow construction space.
[0004] The purpose of this utility model is achieved by the following technical solutions:
[0005] A foundation reinforcement structure for an existing high-rise building, characterized in that it comprises a plurality of steel pipe segments, wherein the plurality of steel pipe segments are extended by being connected by sleeves; a grouting pipe is arranged in each of the steel pipe segments, the length of the grouting pipe matches the length of the steel pipe segment, the grouting pipes are extended by a detachable fixed connection, and a grouting device is arranged at the bottom end of the lowest grouting pipe.
[0006] A limiting angle steel is provided on the inner wall of the steel pipe segment, and the grouting pipe is arranged in a limiting area between the limiting angle steel and the inner wall of the steel pipe segment.
[0007] A protective angle steel is arranged on the inner wall of the steel pipe segment corresponding to the position of the grouting device, and the protective angle steel is located below the grouting device.
[0008] The upper and lower adjacent grouting pipes are fixedly connected by arranging inner and outer threads.
[0009] The grouting pipe is a galvanized grouting pipe with a length not exceeding 2m.
[0010] The grouting device is a grouting device with a non-return function.
[0011] The advantages of the utility model are:
[0012] (1) By setting up grouting pipes in sections, construction can be carried out in narrow (low-rise) spaces without affecting the daily operation of high-rise buildings;
[0013] (2) The threads at the upper and lower ends of the single-section grouting pipe are used to achieve welding-free extension, while improving the sealing performance of the grouting pipe;
[0014] (3) The grouting pipe is fixed by the limiting angle steel and the protective angle steel inside the steel pipe pile so that the grouting pipe can effectively enter the bearing layer vertically along with the steel pipe pile;
[0015] (4) It can improve the bearing capacity of steel pipe piles;
[0016] (5) Under the same conditions, the amount of steel pipes used can be reduced, which is beneficial to economic savings and energy consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the structure of the utility model;
[0018] Figure 2 It is a detailed structural diagram of the steel pipe connection position in the utility model;
[0019] Figure 3 It is a schematic diagram of the detailed structure of the pile end in the utility model;
[0020] Figure 4 It is a schematic diagram of the arrangement of the limiting angle steel in the utility model;
[0021] Figure 5 for Figure 4 Cross-sectional view of . DETAILED DESCRIPTION
[0022] The following is a further detailed description of the features of the present invention and other related features through embodiments in conjunction with the accompanying drawings to facilitate understanding by technicians in the same industry:
[0023] like Figure 1-5 As shown, the marks 1-8 in the figure respectively represent: steel pipe pile 1, grouting pipe 2, concrete 3, soil plug 4, grouting device 5, casing 6, protective angle steel 7, and limit angle steel 8.
[0024] Example: Combination Figures 1 to 5 As shown, in this embodiment, the existing high-rise building foundation reinforcement structure is arranged on the foundation bottom plate of the existing high-rise building and can be connected with the foundation bottom plate as a whole, and the foundation of the existing high-rise building is reinforced by the bearing capacity provided by the reinforcement structure.
[0025] Specifically, the reinforcement structure in this embodiment includes a steel pipe pile 1, which adopts a segmented structure, that is, it is composed of a number of steel pipe segments assembled together, wherein the length of each steel pipe segment is consistent with the constructible height in the existing high-rise building; for example, when the floor height of the existing high-rise building is 2m, the length of each steel pipe segment is less than 2m, so as to ensure that it can be constructed in a narrow space.
[0026] In this embodiment, the assembly and extension between the steel pipe segments can be achieved by setting a sleeve 6 between the upper and lower adjacent steel pipe segments. Specifically, the sleeve 6 is sleeved on the connecting ends of the upper and lower adjacent steel pipe segments, and then the upper part of the sleeve 6 is welded and fixed to the upper steel pipe segment, and the lower part is welded and fixed to the lower steel pipe segment, so that the upper and lower adjacent steel pipe segments form an integral structure, thereby improving the overall structural performance of the formed steel pipe pile 1, especially the bearing capacity.
[0027] Combination Figure 1 and Figure 4 As shown, a grouting pipe 2 is provided in each steel pipe segment, and the length of the grouting pipe 2 matches the length of the steel pipe segment. Figure 5 As shown, the grouting pipe 2 is fixed to the inner wall of the steel pipe segment by the limiting angle steel 8, so as to ensure that the grouting pipe 2 can effectively enter the bearing layer vertically along with the steel pipe pile 1. In this embodiment, each grouting pipe 2 in each steel pipe segment is extended by threaded connection, that is, matching inner and outer threads are arranged at the connecting ends of the upper and lower adjacent grouting pipes 2, and then the fixed connection between the grouting pipes 2 is realized by the cooperation of the inner and outer threads, so as to realize the non-welding extension and improve the sealing performance of the grouting pipe.
[0028] Combination Figure 1 and Figure 3 As shown, a grouting device 5 is connected below the lowest grouting pipe 2. The grouting device 5 is a grouting device with a check function. Grouting is performed on the pile end and pile side of the steel pipe pile 1 through the grouting pipe 2 and the grouting device 5. In this embodiment, in order to fix and protect the grouting device 5, a protective angle steel 7 is arranged below it. The protective angle steel 7 is welded to the inner wall of the steel pipe segment and corresponds to the position of the grouting device 5 to prevent the grouting device 5 from being damaged during the sinking project.
[0029] This embodiment, when applied, includes the following construction method:
[0030] 1) The grouting device 5 is connected to the grouting pipe 2 at the lowest section by threaded connection, and the protective angle steel 7 is fixed to the inner wall of the lowest section of the steel pipe segment by welding.
[0031] 2) Connect the piles through the casing 6 and press down the steel pipe segment, pass the grouting pipe through the limiting angle steel 8 on the inner wall of the upper steel pipe segment and connect it with the grouting pipe on the inner wall of the lower steel pipe segment through threads.
[0032] 3) According to step 2), the steel pipe segments and the grouting pipes 2 fixed on the inner wall thereof are sequentially extended until the steel pipe segments reach the designed length to form the steel pipe pile 1. In the process of pressing the steel pipe segments, a soil plug 4 is formed inside thereof, and the soil plug 4 also improves the bearing capacity of the steel pipe pile 1 to a certain extent through the soil plug effect.
[0033] 4) Pour concrete 3 into the steel pipe pile 1 to fill the core. After the concrete 3 solidifies, inject reinforcement slurry through the grouting pipe and seal the pile for maintenance. By reinforcing the pile end and pile side, the bearing capacity is improved, thereby improving the foundation reinforcement effect of existing high-rise buildings.
[0034] Although the above embodiments have described the concepts and embodiments of the purpose of the utility model in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the utility model without departing from the scope of the claims, so they are not described one by one here.
Claims
1. A foundation reinforcement structure for an existing high-rise building, characterized in that: It comprises a plurality of steel pipe segments, which are extended by sleeve connection; a grouting pipe is arranged in each of the steel pipe segments, the length of the grouting pipe matches the length of the steel pipe segment, the grouting pipes are extended by detachable fixed connection, and a grouting device is arranged at the bottom end of the lowest grouting pipe.
2. The existing high-rise building foundation reinforcement structure according to claim 1, characterized in that: A limiting angle steel is provided on the inner wall of the steel pipe segment, and the grouting pipe is arranged in a limiting area between the limiting angle steel and the inner wall of the steel pipe segment.
3. The existing high-rise building foundation reinforcement structure according to claim 1, characterized in that: A protective angle steel is arranged on the inner wall of the steel pipe segment corresponding to the position of the grouting device, and the protective angle steel is located below the grouting device.
4. The existing high-rise building foundation reinforcement structure according to claim 1, characterized in that: The upper and lower adjacent grouting pipes are fixedly connected by arranging inner and outer threads.
5. The existing high-rise building foundation reinforcement structure according to claim 1 or 4, characterized in that: The grouting pipe is a galvanized grouting pipe with a length not exceeding 2m.
6. The existing high-rise building foundation reinforcement structure according to claim 1, characterized in that: The grouting device is a grouting device with a non-return function.