Existing beam plate type raft foundation reinforcing structure

Abstract

The utility model relates to the technical field of existing raft foundation reinforcement and transformation, in particular to an existing beam plate type raft foundation reinforcement structure. The foundation structure comprises an existing current foundation flat plate and an existing current foundation main beam, and further comprises a thickening and reinforcing raft plate and a post-embedded anchor bar, the thickening and reinforcing raft plate is arranged on the existing current foundation flat plate, and the post-embedded steel bar anchor bar is arranged between the thickening and reinforcing raft plate and the existing current foundation flat plate. The thickened and reinforced raft plate is arranged on the existing current foundation flat plate and is firmly connected with the existing current foundation flat plate, the service life of the existing current beam plate type raft foundation can be prolonged, meanwhile, the reinforced beam plate type raft foundation is simple in construction process, safe and reliable, the construction period is shortened, and the reinforced existing beam plate type raft foundation has good punching-resistant and shearing-resistant bearing capacity and is suitable for being popularized and applied. The requirements for the use function and the building safety level of the existing beam plate type raft foundation after reinforcement can be effectively met, and the safety problem of the existing beam plate type raft foundation after modification and reinforcement is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of reinforcement and transformation of an existing raft foundation, in particular to an existing beam-slab raft foundation reinforcement structure. Background Art

[0002] In the field of housing construction, beam-slab raft foundations are widely used due to their good integrity, high flexural rigidity, and ability to effectively resist uneven loads transmitted from the building's superstructure and uneven settlement of the underlying foundation. However, buildings and structures that use beam-slab raft foundations inevitably suffer irreversible damage due to factors such as prolonged use or damage from natural disasters. At the same time, when the functional positioning of some buildings and structures changes (such as the conversion of underground shopping malls into underground parking lots), these factors, such as structural damage or changes in the functional positioning of the building and structure itself, will require the modification and reinforcement of the beam-slab raft foundation.

[0003] As a concealed engineering project for buildings (structures), beam-slab raft foundations require structural safety and reliability when they are renovated and reinforced. However, due to the relatively unique location of raft foundations, the renovation and reinforcement process often requires significant manpower, material, and financial resources. Therefore, it is necessary to develop a beam-slab raft foundation reinforcement structure that is safe and reliable, has simple construction technology, saves construction time, and at the same time meets structural safety requirements to ensure the normal function of the building (structure) after renovation and reinforcement. Utility Model Content

[0004] In response to the above problems, the present invention provides a reinforcement structure for an existing beam-slab raft foundation to solve the safety issues of the existing beam-slab raft foundation after renovation and reinforcement. This raft foundation reinforcement structure is safe and reliable. A thickened and reinforced raft slab is arranged on top of the existing foundation slab structure, which is firmly connected to the existing foundation slab structure and can extend the service life of the existing beam-slab raft foundation structure. At the same time, the construction process of this structure is simple and saves construction time. The reinforced existing beam-slab raft foundation has good anti-shear and anti-shear bearing capacity, which can effectively meet the functional requirements of the reinforced raft foundation and the requirements of the building safety level.

[0005] The utility model is achieved through the following technical solutions:

[0006] An existing beam-slab raft foundation reinforcement structure includes an existing existing foundation slab and an existing existing foundation main beam, and also includes a thickened and reinforced raft slab and post-embedded anchor bars; the thickened and reinforced raft slab is arranged on the existing existing foundation slab, and the post-embedded anchor bars are arranged between the thickened and reinforced raft slab and the existing existing foundation slab.

[0007] The existing main beam frame of the foundation is evenly distributed with embedded steel bar holes all around; the thickened and reinforced raft slab includes vertically staggered transverse reinforcing steel bars and longitudinal reinforcing steel bars, and both ends of the transverse reinforcing steel bars and longitudinal reinforcing steel bars are respectively embedded in the embedded steel bar holes.

[0008] The gaps between the transverse reinforcing steel bars, the longitudinal reinforcing steel bars and the embedded steel bar drill holes are filled with adhesive.

[0009] The thickened and reinforced raft slab is a reinforced concrete structure, and the thickness of the thickened and reinforced raft slab is 300mm to 500mm.

[0010] The transverse reinforcement steel bars and the longitudinal reinforcement steel bars are connected by binding or welding. The steel bar model is HRB400, the diameter is 16mm to 22mm, and the spacing is 150mm to 200mm.

[0011] The depth of the embedded reinforcement holes drilled into the existing foundation main beam is not less than 25 times the diameter of the transverse reinforcement steel bars.

[0012] The post-embedded anchor bar steel bar model is HRB400, with a diameter of 10mm to 14mm. The post-embedded anchor bar is arranged in a plum blossom shape, with a horizontal and vertical spacing of 600mm×600mm. Beneficial effects

[0013] A thickened and reinforced raft slab is set on the existing existing foundation slab, which is firmly connected to the existing existing foundation slab structure, and can extend the service life of the existing existing beam-slab raft foundation structure. At the same time, the construction process of the reinforced structure is simple, safe and reliable, and saves construction time. The reinforced raft slab structure has good shear resistance and shear bearing capacity, which can effectively meet the use function of the reinforced raft slab foundation and the requirements of the building safety level, and effectively solve the safety problems of the existing existing beam-slab raft foundation structure after transformation and reinforcement.

[0014] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1It is a plan view of the utility model.

[0017] Figure 2 It is a cross-sectional schematic diagram of the present utility model.

[0018] In the figure: 1. Existing foundation slab; 2. Existing foundation main beam; 3. Thickened and reinforced raft slab; 4. Transverse reinforcement steel bars; 5. Longitudinal reinforcement steel bars; 6. Post-embedded anchor bars; 7. Drilling holes for embedded reinforcement. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0020] The technical solution of the present invention will be described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] like Figure 1 The illustrated embodiment shows an existing beam-slab raft foundation reinforcement structure, comprising an existing foundation slab 1 and an existing foundation main beam 2, and also comprising a thickened and reinforced raft slab 3 and post-embedded anchor bars 6; the thickened and reinforced raft slab 3 is arranged on the existing foundation slab 1, and the post-embedded anchor bars 6 are arranged between the thickened and reinforced raft slab 3 and the existing foundation slab 1; the thickened and reinforced raft slab 3 is arranged on one of the existing foundation slabs, so that the overall thickness of the reinforced raft slab structure is increased, thereby improving the shear resistance and shear bearing capacity of the raft slab structure.

[0022] The existing foundation main beam 2 frame is evenly distributed with embedded steel bar drill holes 7 all around; the thickened and reinforced raft slab 3 includes transverse reinforcing steel bars 4 and longitudinal reinforcing steel bars 5 arranged vertically and horizontally, and the ends of the transverse reinforcing steel bars 4 and longitudinal reinforcing steel bars 5 are respectively embedded in the embedded steel bar drill holes 7.

[0023] Furthermore, in the present invention, anchor holes 7 are provided on the existing foundation main beam 2 to facilitate the construction of the transverse reinforcement bars 4. The depth of the anchor holes 7 is not less than 25d (d is the diameter of the transverse reinforcement bars 4). The transverse reinforcement bars 4 can enhance the integrity between the existing foundation main beam 2 and the thickened and reinforced raft 3. The anchor holes 7 are evenly distributed around the interior of the existing foundation main beam 2 frame. The transverse reinforcement bars 4 and longitudinal reinforcement bars 5 are vertically and staggered on the thickened and reinforced raft 3. The transverse reinforcement bars 4 and longitudinal reinforcement bars 5 are respectively embedded in the anchor holes 7 at both ends. The anchor holes 7 facilitate the implantation of the transverse reinforcement bars 4 and longitudinal reinforcement bars 5 into the existing foundation main beam 2. The gaps between the transverse reinforcement bars 4, longitudinal reinforcement bars 5 and the anchor holes 7 are filled with adhesive. The transverse reinforcement bars 4 and longitudinal reinforcement bars 5 can enhance the integrity between the existing foundation main beam 2 and the thickened and reinforced raft 3, while ensuring the overall bending resistance of the thickened and reinforced raft 3 structure.

[0024] Furthermore, the thickened and reinforced raft 3 is a reinforced concrete structure with a thickness of 300 mm to 500 mm. The thickened and reinforced raft 3 has the same concrete grade as the existing foundation slab 1.

[0025] Furthermore, transverse reinforcing steel bars 4 and longitudinal reinforcing steel bars 5 are provided on the thickened and reinforced raft slab 3, and the transverse reinforcing steel bars 4 and longitudinal reinforcing steel bars 5 are tied or welded together. The transverse reinforcing steel bars 4 and longitudinal reinforcing steel bars 5 are of HRB400 type, with a diameter of 16 mm to 22 mm and a spacing of 150 mm to 200 mm, so as to ensure the overall bending resistance of the thickened and reinforced raft slab 3 structure.

[0026] The depth of the anchoring drill hole 7 penetrating into the existing foundation main beam 2 is not less than 25 times the diameter of the transverse reinforcement steel bar 4.

[0027] Furthermore, the post-embedded anchor bars 6 installed between the thickened and reinforced raft slab 3 and the existing foundation slab 1 are HRB400 steel bars with a diameter of 10mm to 14mm. The post-embedded anchor bars 6 are arranged in a plum blossom pattern, with a horizontal and vertical spacing of 600mm x 600mm. These post-embedded anchor bars ensure a reliable vertical connection between the existing foundation slab 1 and the thickened and reinforced raft slab 3, enabling them to deform and withstand stress in a coordinated manner.

[0028] Furthermore, in the present invention, when the thickened and reinforced raft slab 3 is poured, the surface of the existing foundation plate 1 needs to be roughened to make the surface rough, so as to improve the bonding strength of the mortar and ensure that the thickened and reinforced raft slab 3 and the existing foundation plate 1 are firmly bonded.

[0029] The utility model is composed of an existing existing foundation slab 1, an existing existing foundation main beam 2, and a thickened and reinforced raft slab 3. The thickened and reinforced raft slab 3 is arranged on the existing existing foundation slab 1, and is firmly connected to the existing existing foundation slab 1 structure to jointly bear the upper load. The structure is simple, the engineering amount is moderate, and it can effectively solve the safety problems of the existing existing beam-slab raft foundation structure after transformation and reinforcement. The reinforced structure of the utility model is safe and reliable, and can extend the service life of the existing existing beam-slab raft foundation structure. At the same time, the construction process of the utility model is simple, and the construction period is shortened. The reinforced existing beam-slab raft foundation has good anti-shear and anti-shear bearing capacity, which can effectively meet the functional use of the reinforced raft foundation and the requirements of the building safety level.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0031] In the absence of conflicts, those skilled in the art may combine the relevant technical features in the above examples according to actual circumstances to achieve corresponding technical effects. Specific descriptions of various combinations are omitted here.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, the terms "first," "second," etc., used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0034] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to these embodiments, but is intended to conform to the broadest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent variations, and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An existing beam-slab raft foundation reinforcement structure, comprising an existing foundation slab (1) and an existing foundation main beam (2), characterized in that: It also includes a thickened and reinforced raft slab (3) and post-embedded anchor bars (6); the thickened and reinforced raft slab (3) is arranged on the existing existing foundation slab (1), and the post-embedded anchor bars (6) are arranged between the thickened and reinforced raft slab (3) and the existing existing foundation slab (1).

2. The existing beam-slab raft foundation reinforcement structure according to claim 1, characterized in that: The existing main beam (2) of the foundation is provided with embedded steel bar drill holes (7) uniformly distributed around the frame. The thickened and reinforced raft slab (3) includes transverse reinforcing steel bars (4) and longitudinal reinforcing steel bars (5) arranged vertically and staggered. Both ends of the transverse reinforcing steel bars (4) and longitudinal reinforcing steel bars (5) are respectively embedded in the embedded steel bar drill holes (7).

3. The existing beam-slab raft foundation reinforcement structure according to claim 2, characterized in that: The gaps between the transverse reinforcing steel bars (4), the longitudinal reinforcing steel bars (5) and the embedded steel bar drill holes (7) are filled with adhesive.

4. The existing beam-slab raft foundation reinforcement structure according to claim 2, characterized in that: The thickened and reinforced raft slab (3) is a reinforced concrete structure, and the thickness of the thickened and reinforced raft slab (3) is 300 mm to 500 mm.

5. The existing beam-slab raft foundation reinforcement structure according to claim 3 is characterized in that: The transverse reinforcement steel bars (4) and the longitudinal reinforcement steel bars (5) are connected by binding or welding, and the steel bar model is HRB400, with a diameter of 16mm to 22mm and a spacing of 150mm to 200mm.

6. The existing beam-slab raft foundation reinforcement structure according to claim 2, characterized in that: The depth of the embedded reinforcement drill hole (7) into the existing foundation main beam (2) is not less than 25 times the diameter of the transverse reinforcement steel bar (4).

7. The existing beam-slab raft foundation reinforcement structure according to claim 1 is characterized in that: The post-embedded anchor bar (6) has a steel bar model of HRB400 and a diameter of 10 mm to 14 mm. The post-embedded anchor bar (6) is arranged in a plum blossom shape with a horizontal and vertical spacing of 600 mm × 600 mm.

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