A underpinning jacking platform for a lintel

Abstract

The utility model discloses a kind of for joist pulls out column's underpinning jacking platform, including frame body underpinning platform and jacking platform;Frame body underpinning platform is set to the lower outer periphery of column to be constructed, and by four steel columns fixedly supported on foundation respectively arranged at its corner position;Jacking platform is set to the upper outer periphery of column to be constructed, jacking platform is connected by being anchored with the column to be constructed by multiple along its circumferential uniform setting of planting nail, and the gap between jacking platform and the column to be constructed is filled with grouting material;Four corner positions between the frame body underpinning platform and the jacking platform are respectively provided with underpinning support, and four edges of the frame body underpinning platform and the jacking platform are respectively provided with vertical jack.The utility model guarantees the effective connection of underpinning platform and the upper structure of column to be constructed, realizes the jacking unloading of upper structure of column to be constructed, and effectively reduces the operation risk in jacking unloading construction process.

Description

Technical Field

[0001] This utility model relates to the field of building renovation and construction technology, and in particular to a support and lifting platform for beam support and column removal. Background Technology

[0002] Column-supporting beam replacement technology refers to a comprehensive and specialized engineering technique that utilizes modern civil engineering technology to replace, remove, or extend columns without or with minimal dismantling of the superstructure, aiming to increase load-bearing capacity, expand base space, or achieve a specific function. Compared to other repair and reinforcement techniques, column-supporting beam replacement technology has a wide range of applications, low investment, short construction period, and minimal impact on building use, thus playing an important role in the renovation and reinforcement of old buildings. However, column-supporting beam replacement projects often require jacking up and unloading the superstructure of the column to be demolished, and the jacking and unloading process carries significant risks. Therefore, effectively establishing a jacking and replacement platform is crucial. Utility Model Content

[0003] The purpose of this utility model is to provide a support and lifting platform for beam and column lifting, thereby solving the technical problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model discloses a support and lifting platform for beam support and column removal, comprising a frame support platform and a lifting platform.

[0006] The frame support platform is located on the lower outer periphery of the column to be constructed and is fixedly supported on the foundation by four steel columns located at its corners.

[0007] The lifting platform is fitted onto the upper outer periphery of the column to be constructed. The lifting platform is anchored to the column to be constructed by multiple reinforcing bars evenly arranged along its circumference, and the gap between the lifting platform and the column to be constructed is filled with grout.

[0008] The frame support platform and the lifting platform are respectively provided with support supports at the four corners, and vertical jacks are respectively provided at the middle of the four sides of the frame support platform and the lifting platform.

[0009] Furthermore, the frame support platform includes a first steel frame fitted around the lower outer periphery of the column to be constructed, the bottom of the first steel frame being fixedly connected to the upper end of each steel column; the lower end of each support bracket being fixedly connected to the four upper corners of the first steel frame; and the main body of each jack being located in the middle of the four upper sides of the first steel frame.

[0010] Furthermore, the first steel frame is made of H400*408*21*21 steel, and multiple first stiffening ribs with a thickness of 16mm are fixedly and evenly spaced inside the first steel frame, with a spacing of 150mm between each two adjacent first stiffening ribs.

[0011] Furthermore, the lifting platform includes a clamping steel plate sleeved on the outer periphery of the upper part of the column to be constructed, and each of the anchor bars is set between the clamping steel plate and the column to be constructed. The gap between the inner wall of the clamping steel plate and the outer wall of the column to be constructed is filled with grout. A second type of steel frame is fixedly sleeved on the outer wall of the clamping steel plate. The upper end of each of the supporting supports is fixedly connected to the four upper corners of the second type of steel frame. The telescopic end of each of the jacks abuts against the middle of the four bottom sides of the second type of steel frame.

[0012] Furthermore, the second steel frame is made of H800*408*16*20 steel, and multiple second stiffening ribs with a thickness of 16mm are fixedly and evenly spaced inside the second steel frame, with a spacing of 150mm between each two adjacent second stiffening ribs.

[0013] Furthermore, each of the aforementioned support supports includes a cylindrical support body, with support brackets at the upper and lower ends of the support body respectively contacting the first steel frame and the second steel frame, and the interior of the support body is provided with reinforcing ribs with a cross-shaped cross section.

[0014] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0015] This invention employs four steel columns for support around the column to be demolished, and uses steel plate structures to clamp the columns (the gaps between the steel plates and the columns are filled with high-performance grout). To ensure an efficient connection between the steel plates and the columns, steel bars are used to reinforce the steel plates and the concrete columns. Above the four steel columns, a support platform is welded from steel plates and upper column-encased steel plates, ensuring an effective connection between the support platform and the upper structure of the column to be constructed. This achieves the lifting and unloading of the upper structure of the column to be constructed, and effectively reduces the operational risks during the lifting and unloading process. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a front view of the overall structure of this utility model;

[0018] Figure 2 This is a three-dimensional view of the overall structure of the present utility model.

[0019] Figure 3 for Figure 1 Cross-sectional view along the AA direction;

[0020] Figure 4 for Figure 1 Cross-sectional view along the BB direction;

[0021] Figure 5 This is a side view of the support bracket of this utility model;

[0022] Figure 6 This is a schematic diagram of the end of the support bracket of this utility model;

[0023] Explanation of reference numerals in the attached drawings: 1. Frame support platform; 1-1. First steel frame; 1-2. First stiffening rib;

[0024] 2. Lifting platform; 2-1. Steel clamp plate; 2-2. Second steel frame; 2-3. Second stiffening rib; 3. Column to be constructed; 4. Rebar installation; 5. Grouting material; 6. Support bearing; 6-1. Support body; 6-2. Support bracket; 6-3. Reinforcing rib; 7. Jack. Detailed Implementation

[0025] like Figures 1-2 As shown, a support and lifting platform for beam support and column removal includes a frame support platform 1 and a lifting platform 2.

[0026] The frame support platform 1 is set on the lower outer periphery of the column 3 to be constructed, and is fixedly supported on the foundation by four steel columns respectively supported at its corner positions.

[0027] The lifting platform 2 is fitted onto the upper outer periphery of the column 3 to be constructed. The lifting platform 2 is anchored to the column 3 to be constructed by a plurality of reinforcing bars 4 evenly arranged along its circumference. The gap between the lifting platform 2 and the column 3 to be constructed is filled with grout 5.

[0028] The frame support platform 1 and the lifting platform 2 are respectively provided with support supports 6 at the four corners, and vertical jacks 7 are respectively provided at the middle of the four sides of the frame support platform 1 and the lifting platform 2.

[0029] like Figure 3 As shown, the frame support platform 1 includes a first steel frame 1-1 fitted around the lower outer periphery of the column 3 to be constructed. The bottom of the first steel frame 1-1 is fixedly connected to the upper end of each steel column. The lower end of each support 6 is fixedly connected to the four upper corners of the first steel frame 1-1, and the main body of each jack 7 is fixedly installed in the middle of the four upper sides of the first steel frame 1-1.

[0030] In this embodiment, the first steel frame 1-1 is made of steel with specifications of H400*408*21*21 by welding. The first steel frame 1-1 is provided with a plurality of first stiffening ribs 1-2 with a plate thickness of 16mm at uniform intervals inside. The distance between any two adjacent first stiffening ribs 1-2 is 150mm.

[0031] like Figure 4 As shown, the lifting platform 2 includes a clamping steel plate 2-1 fitted around the upper outer periphery of the column 3 to be constructed. The clamping steel plate 2-1 is 20mm thick and 1.4m high. Each of the reinforcing bars 4 is positioned between the clamping steel plate 2-1 and the column 3 to be constructed. Specifically, 20 reinforcing bars are installed on each side of the column, for a total of 80 bars on all four sides. The gap between the inner wall of the clamping steel plate 2-1 and the outer wall of the column 3 to be constructed is filled with grout 5. A second steel frame 2-2 is fixedly fitted onto the outer wall of the clamping steel plate 2-1. The upper ends of each of the supporting supports 6 are fixedly connected to the four upper corners of the second steel frame 2-2. The telescopic ends of each of the jacks 7 abut against the middle of the four bottom sides of the second steel frame 2-2.

[0032] In this embodiment, the second steel frame 2-2 is made of steel with specifications of H800*408*16*20 by welding. The interior of the second steel frame 2-2 is fixedly provided with a plurality of second stiffening ribs 2-3 with a plate thickness of 16mm at uniform intervals, and the distance between each pair of adjacent second stiffening ribs 2-3 is 150mm.

[0033] like Figures 5-6 As shown, each of the support supports 6 includes a cylindrical support body 6-1. The upper and lower ends of the support body 6-1 are respectively provided with support brackets 6-2 that contact the first steel frame 1-1 and the second steel frame 2-2. The interior of the support body 6-1 is provided with reinforcing ribs 6-3 with a cross-shaped cross section.

[0034] The specific operating steps for this invention during construction are as follows:

[0035] (1) Fabrication of the support platform: The first steel frame is fabricated by welding using H400*408*21*21 steel profiles. At the same time, a first stiffening rib is set every 150mm in the web of the steel profile, and the thickness of the first stiffening rib is 16mm. The first steel frame is fixedly supported by steel columns arranged along the height direction starting from the bottom of the column foundation to be constructed.

[0036] (2) Construction of the lifting platform: The lifting platform is made of 20mm thick steel plate and is clamped above the column to be constructed. The clamp steel plate is connected to the column to be constructed by C20 rebar anchoring. 20 rebars are set on each of the four sides of the column, for a total of 80 rebars. The gap between the clamp steel plate and the column is filled with grout. The clamp steel plate is 1.4m high. A second steel frame is welded to the outside of the clamp steel plate. The cross-sectional dimensions of the steel frame are H800*408*16*20. A second stiffening rib is set every 150mm. The plate thickness of the second stiffening rib is 16mm.

[0037] (3) Place four support supports at the corner between the support platform and the lifting platform, and then use four jacks to lift the support simultaneously to transfer all the load at the bottom of the column to the support platform. At this time, the lower column is demolished. After the construction is completed, the concrete beam is enlarged. After the concrete beam reaches the design strength, the support platform is unloaded and the structural safety is monitored in real time.

[0038] (4) After unloading is completed and the structural monitoring data is normal, the frame support platform and lifting platform are cut and dismantled to complete the construction.

[0039] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A lifting platform for supporting beams and removing columns, characterized in that: This includes the frame support platform and the lifting platform; The frame support platform is set on the lower outer periphery of the column to be constructed, and is fixedly supported on the foundation by four steel columns respectively set at its corners; The lifting platform is fitted onto the upper outer periphery of the column to be constructed. The lifting platform is anchored to the column to be constructed by multiple reinforcing bars evenly arranged along its circumference. The gap between the lifting platform and the column to be constructed is filled with grout. The frame support platform and the lifting platform are respectively provided with support supports at the four corners, and vertical jacks are respectively provided at the middle of the four sides of the frame support platform and the lifting platform.

2. The underpinning jacking platform for a lintel post according to claim 1, characterized in that: The frame support platform includes a first steel frame fitted around the lower outer periphery of the column to be constructed. The bottom of the first steel frame is fixedly connected to the upper end of each steel column. The lower end of each support is fixedly connected to the four upper corners of the first steel frame. The main body of each jack is located in the middle of the four upper sides of the first steel frame.

3. The underpinning jacking platform for a lintel post according to claim 2, characterized in that: The first steel frame is made of H400*408*21*21 steel. Multiple first stiffening ribs with a thickness of 16mm are fixedly and evenly spaced inside the first steel frame, and the distance between any two adjacent first stiffening ribs is 150mm.

4. The underpinning jacking platform for a lintel pull column according to claim 2, characterized in that: The lifting platform includes a clamping steel plate sleeved on the outer periphery of the upper part of the column to be constructed. Each of the anchor bars is set between the clamping steel plate and the column to be constructed. The gap between the inner wall of the clamping steel plate and the outer wall of the column to be constructed is filled with grout. A second type of steel frame is fixedly sleeved on the outer wall of the clamping steel plate. The upper end of each of the supporting supports is fixedly connected to the four upper corners of the second type of steel frame. The telescopic end of each of the jacks abuts against the middle of the four bottom sides of the second type of steel frame.

5. The jacking platform for beam and column lifting according to claim 4, characterized in that: The second steel frame is made of H800*408*16*20 steel. Multiple second stiffening ribs with a thickness of 16mm are evenly spaced and fixed inside the second steel frame, and the distance between any two adjacent second stiffening ribs is 150mm.

6. The jacking platform for beam and column lifting according to claim 4, characterized in that: Each of the aforementioned support supports includes a cylindrical support body, with support brackets at the upper and lower ends of the support body respectively contacting the first steel frame and the second steel frame, and reinforcing ribs with a cross-shaped cross section provided inside the support body.

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