Temporary support device for stress conversion of existing structure

Abstract

The utility model relates to the field of building improvement, and aims to provide a temporary support device for stress conversion of an existing structure, which comprises an existing bottom plate, an existing underpinning part positioned above the existing bottom plate and a temporary support for bearing the load of the existing underpinning part, a plurality of steel cushion blocks are arranged on the steel cushion plate at intervals in the left-right direction, and the temporary support is erected on the top sides of the steel cushion blocks; the steel base plate is further provided with a plurality of hydraulic synchronous jacks used for synchronously jacking the temporary support. The device is wide in application range, high in integrity and stability, high in safety and reliability and capable of being widely applied to projects such as existing building maintenance, transformation and construction.

Description

Technical Field

[0001] This utility model relates to the field of existing building improvement, specifically a temporary support device for the stress transformation of existing structures. Background Technology

[0002] Quality improvement projects such as the maintenance, renovation, and revitalization of existing buildings contribute to urban renewal.

[0003] Due to the need to improve the quality of existing buildings, their functional requirements may change during their life cycle, such as adding floors or expanding the space, necessitating "beam and column replacement." During this process, the original load must first be borne by temporary support structures, and then transferred to the new load-bearing components through appropriate methods. This involves the existing structural load transfer support system and its core technologies. Therefore, the existing structural load transfer support system and its core technologies are crucial to the success of the renovation and improvement of existing buildings; simultaneously, they have significant practical engineering implications for ensuring the safety and reliability of the existing structure during the renovation process, as well as the performance of the new structure working collaboratively with the existing structure.

[0004] Currently, the most common types of support for existing load-bearing structures are column support, wall support, and overall structural support. Before the newly added load-bearing components are installed, the traditional method for temporary support of the existing superstructure load is to use jacks to apply prestress to tighten the steel beams and columns to the floor slab, then use steel wedges to fill the jack positions, remove the jacks, add the new load-bearing components, and then use jacks to lift the floor slab before removing the steel wedges. The biggest drawback of this traditional method is the inability to control the loss of prestress. For example, the invention patent with publication number CN 114412228 B (patent name: A support system and control method for load conversion of existing structures) solves the shortcomings of the traditional method by using a synchronous loading method with an axial force servo system. The biggest innovation of this invention patent is the use of a synchronous loading method with an axial force servo system, but this technology is now mature and there are more advanced technologies, such as "hydraulic synchronous jacking technology based on programmable logic controller (PLC)". At the same time, this patent has the following obvious shortcomings: First, poor overall integrity and stability. Each steel column is connected to a jack individually. During the lifting process, each steel column bears the force independently, failing to form a unified force distribution, resulting in uneven stress. Furthermore, the stability of the steel columns deteriorates beyond a certain height, posing a certain safety hazard. Secondly, its applicability is limited. As mentioned earlier, due to the instability of the steel columns, it cannot be used in areas with high heights (such as single-story basements with high ceilings or multi-story basements) or areas subjected to significant stress.

[0005] With the increasing number of existing building quality improvement and renovation projects, high-span and high-load existing structure renovation projects are becoming more and more common. This application studies and improves the overall temporary support device for the stress transfer of high-span and high-load existing structures. Utility Model Content

[0006] The purpose of this utility model is to provide a temporary support device for the stress transformation of existing structures. It has a wide range of applications, strong integrity and stability, and high safety and reliability. It can be widely used in projects such as maintenance, renovation and revitalization of existing buildings.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A temporary support device for load transfer of an existing structure includes an existing base plate, an existing support structure located above the existing base plate, and a temporary support for bearing the load of the existing support structure. A steel pad is laid on the top side of the existing base plate, and several steel blocks are spaced apart on the left and right sides of the steel pad. The temporary support is erected on the top side of each steel block. Several hydraulic synchronous jacks for synchronously lifting the temporary support are also installed on the steel pad.

[0009] Compared with the prior art, the advantages of this utility model are:

[0010] 1. By setting up hydraulic synchronous jacks, the temporary supports are lifted synchronously, ensuring the safety and controllability of the lifting process and possessing good stability and safety. At the same time, by setting up steel pads, the load on the temporary supports is transferred from the jacks or steel pads to the steel pads, and then further to the existing base plate, effectively reducing the local stress on the existing base plate, improving the stability of the support structure, and achieving the goal of enhancing the overall load-bearing capacity of the temporary supports.

[0011] 2. Through the cooperation of the base steel beam, top steel beam, horizontal steel beam, diagonal steel beam and steel column, the overall structure of the temporary support is subjected to uniform stress, which improves the support effect and ensures the safety of high span and large load support. Furthermore, by setting the first reinforcing steel plate, the first reinforcing rib, the second reinforcing steel plate and the second reinforcing rib, the reliability of the node connection is ensured and the stability of the temporary support is improved. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of an embodiment of a temporary support device for stress conversion in existing structures according to the present invention.

[0013] Figure 2 This is a simplified structural diagram of the temporary support of this utility model;

[0014] Figure 3 yes Figure 2 Sectional view of section AA;

[0015] Figure 4 yes Figure 2 BB section sectional view;

[0016] Figure 5 yes Figure 2 CC section sectional view;

[0017] Figure 6 yes Figure 2 DD section sectional view.

[0018] Labeling Explanation: 1 Existing base plate, 2 Existing support section, 3 Temporary support, 31 Base steel beam, 311 First I-beam, 312 First reinforcing steel plate, 313 First reinforcing rib, 32 Top steel beam, 321 Second I-beam, 322 Second reinforcing steel plate, 323 Second reinforcing rib, 33 Steel column, 34 Horizontal steel beam, 35 Diagonal steel beam, 36 Steel stiffening plate, 4 Steel pad plate, 5 Steel pad block, 6 Hydraulic synchronous jack. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0020] like Figure 1-6 The diagram shown is a schematic representation of an embodiment of a temporary support device for stress transfer in existing structures provided by this utility model:

[0021] A temporary support device for load transfer of an existing structure includes an existing base plate 1, an existing support section 2 located above the existing base plate 1, and a temporary support 3 for bearing the load of the existing support section 2. A steel pad 4 is laid on the top side of the existing base plate 1, and a number of steel pad blocks 5 are arranged at intervals on the left and right sides of the steel pad 4. The temporary support 3 is erected on the top side of each steel pad block 5. A number of hydraulic synchronous jacks 6 for synchronously lifting the temporary support 3 are also installed on the steel pad 4.

[0022] Specifically, the existing support 2 is an existing beam structure or an existing floor slab.

[0023] Furthermore, the hydraulic synchronous jack 6 is an existing technology based on a programmable logic controller (PLC) to achieve synchronous jacking.

[0024] Furthermore, several hydraulic synchronizing jacks 6 are installed on the steel pad 4 at left and right intervals, and at least one hydraulic synchronizing jack 6 is installed between two adjacent steel pad blocks 5.

[0025] The temporary support 3 includes a base steel beam 31 erected on a steel pad 5, a top steel beam 32 located above the base steel beam 31, and a number of steel columns 33 longitudinally connected between the base steel beam 31 and the top steel beam 32; the number of steel columns 33 are arranged at intervals on the left and right, and a number of horizontal steel beams 34 are connected laterally between two adjacent steel columns 33, and a number of oblique steel beams 35 that cooperate with the horizontal steel beams 34 to bear the force are also connected obliquely between two adjacent steel columns 33.

[0026] The base steel beam 31 includes a first I-beam 311 connected to the bottom end of the steel column 33, and a first reinforcing steel plate 312 is connected between the opposite openings on both sides of the first I-beam 311; the top steel beam 32 includes a second I-beam 321 connected to the top end of the steel column 33, and a second reinforcing steel plate 322 is connected between the opposite openings on both sides of the second I-beam 321.

[0027] Two first reinforcing ribs 313 are also provided at the connection point of the first I-beam 311 corresponding to the steel column 33. The two first reinforcing ribs 313 are respectively welded and fixed between the first reinforcing steel plates 312 on both sides and the web of the first I-beam 311.

[0028] The second I-beam 321 is also provided with two second reinforcing ribs 323 at the connection point with the steel column 33. The two second reinforcing ribs 323 are respectively welded and fixed between the second reinforcing steel plates 322 on both sides and the web of the second I-beam 321.

[0029] Furthermore, the steel columns 33, horizontal steel beams 34, and inclined steel beams 35 are selected based on actual stress calculations, using I-beams with cross-sectional dimensions and material strength that meet the requirements of self-weight and strength under working conditions. The steel columns 33 are all fixed to the base steel beams 31, top steel beams 32, horizontal steel beams 34, and inclined steel beams 35 by welding.

[0030] The bottom of the steel column 33 is provided with several steel stiffening plates 36 that are welded to the base steel beam 31. The steel stiffening plates 36 are arranged circumferentially on the outer peripheral wall of the bottom of the steel column 33.

[0031] The installation process of this utility model is roughly as follows:

[0032] S1. Level the existing base plate 1 and place the steel pad 4 on the existing base plate 1 according to the preset position.

[0033] S2. Based on the length of the base steel beam 31, several steel pads 5 and several hydraulic synchronous tops 6 are spaced out on the steel pad plate 4.

[0034] S3. The base steel beam 31 is erected on the top side of several steel pads 5. Then, a hoist is used to lift several steel columns 33 to the predetermined position, and the steel columns 33 are ensured to be vertical and stable. Then, steel stiffening plates 36 are used to weld and fix the bottom of the steel columns 33 to the base steel beam 31. Finally, the top steel beam 32 is welded and fixed to the top of the steel columns 33 below the existing support part 2.

[0035] S4. According to the stress calculation requirements, weld a horizontal steel beam 34 and a diagonal steel beam 35 between two adjacent steel columns 33 to ensure the safety of the temporary support.

[0036] S5. Start each hydraulic synchronous jack 6 and achieve synchronous jacking through PLC system debugging. As the temporary support 5 rises and supports the existing support part 2, the load acting on the existing support part 2 is borne by the temporary support 5, thus completing the force transfer of the existing structure.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A temporary bracing device for force transfer in existing structures, characterised in that: It includes an existing base plate (1), an existing support section (2) located above the existing base plate (1), and a temporary support (3) for bearing the load of the existing support section (2). A steel pad (4) is laid on the top side of the existing base plate (1). Several steel pads (5) are arranged on the steel pad (4) at intervals on the left and right. The temporary support (3) is erected on the top side of each steel pad (5). Several hydraulic synchronous jacks (6) for synchronously lifting the temporary support (3) are also installed on the steel pad (4).

2. The temporary bracing device for force transfer in existing structures of claim 1, wherein: The temporary support (3) includes a base steel beam (31) erected on a steel pad (5), a top steel beam (32) located above the base steel beam (31), and several steel columns (33) longitudinally connected between the base steel beam (31) and the top steel beam (32); the several steel columns (33) are arranged at intervals on the left and right, and several horizontal steel beams (34) are connected laterally between two adjacent steel columns (33), and several oblique steel beams (35) that cooperate with the horizontal steel beams (34) to bear the force are also connected obliquely between two adjacent steel columns (33).

3. The temporary bracing device for force transfer in existing structures of claim 2, wherein: The base steel beam (31) includes a first I-beam (311) connected to the bottom end of the steel column (33), and a first reinforcing steel plate (312) is connected between the relative openings on both sides of the first I-beam (311); the top steel beam (32) includes a second I-beam (321) connected to the top end of the steel column (33), and a second reinforcing steel plate (322) is connected between the relative openings on both sides of the second I-beam (321).

4. The temporary bracing device for force transfer in existing structures of claim 3, wherein: Two first reinforcing ribs (313) are also provided at the connection point of the first I-beam (311) and the corresponding steel column (33). The two first reinforcing ribs (313) are respectively welded and fixed between the first reinforcing steel plates (312) on both sides and the web of the first I-beam (311). Two second reinforcing ribs (323) are provided at the connection point of the second I-beam (321) and the corresponding steel column (33). The two second reinforcing ribs (323) are respectively welded and fixed between the second reinforcing steel plates (322) on both sides and the web of the second I-beam (321).

5. The temporary support device for stress transfer in existing structures according to any one of claims 2 to 4, characterized in that: The bottom of the steel column (33) is provided with several steel stiffening plates (36) that are welded to the base steel beam (31). The steel stiffening plates (36) are arranged circumferentially on the outer wall of the bottom of the steel column (33).

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