Horizontal limiting device for existing structure stress conversion support

Abstract

The utility model relates to the field of quality improvement and reconstruction of existing buildings in urban renewal, and aims to provide a horizontal limiting device for an existing structure stress conversion support, which comprises an existing bottom plate, an existing underpinning part and an existing wall column, a temporary support used for bearing the load of the existing underpinning part is arranged on a jacking part of the hydraulic jack in a supported mode, a plurality of horizontal limiting assemblies are arranged in the height direction of the existing wall column at intervals, and transverse limiting rods in one-to-one correspondence with the horizontal limiting assemblies are arranged in the height direction of the temporary support; one end of the transverse limiting rod is fixedly connected with the temporary support, the other end of the transverse limiting rod is fixedly provided with a steel connecting piece, and the steel connecting piece is in longitudinal sliding fit with the horizontal limiting assembly. According to the utility model, the stability, reliability and safety of the existing structure in the stress conversion process can be enhanced, the implementation is easy, the manufacturing cost is low, and the applicability is wide.

Description

A horizontal limiting device for load-bearing conversion supports in existing structures Technical Field

[0001] This utility model relates to the field of existing building improvement, specifically a horizontal limiting device for a load-bearing conversion support for 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 underpinning for existing load-bearing structures are column underpinning, wall underpinning, and overall structural underpinning. The traditional method for temporary support of the existing superstructure before adding new load-bearing components involves using jacks to apply prestress and tighten the steel beams and columns to the floor slab. Steel wedges are then used to fill the jack positions, the jacks are removed, and after adding the new load-bearing components, the floor slab is lifted again using jacks before the steel wedges are removed. This traditional method has some drawbacks. For example, the steel columns experience eccentric stress during the lifting process, and their stability deteriorates beyond a certain height, posing a safety hazard. Furthermore, the traditional method has a limited scope of application; due to the instability of the steel columns, it cannot be used in underpinning areas with high heights (such as single-story basements with high ceilings or multi-story basements) or heavy loads.

[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. Summary of the Invention

[0006] The purpose of this utility model is to provide a horizontal limiting device for a load-bearing conversion support of an existing structure, which can enhance the stability, reliability and safety of the load-bearing conversion process of the existing structure, and is easy to implement, low in cost and has wide applicability.

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

[0008] A horizontal limiting device for a load-bearing conversion support of an existing structure includes an existing base plate, an existing support portion located above the existing base plate, and an existing wall column. The lower end of the existing wall column is connected to the existing base plate, and the upper end of the existing wall column is supported at the bottom of the existing support portion. A hydraulic jack is installed above the existing base plate, and a temporary support for bearing the load of the existing support portion is supported on the lifting part of the hydraulic jack. Several horizontal limiting components are spaced apart along the height direction of the existing wall column. A transverse limiting rod corresponding to each horizontal limiting component is provided along the height direction of the temporary support. One end of the transverse limiting rod is fixedly connected to the temporary support, and a steel connector is fixedly provided at the other end. The steel connector and the horizontal limiting components slide longitudinally together.

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

[0010] 1. By setting up several horizontal limiting components and corresponding transverse limiting rods, the temporary support can avoid eccentric force, effectively limit the horizontal displacement of the temporary support during the working process, and ensure that the temporary support only slides in the vertical direction, thereby significantly improving the integrity and stability of the force conversion support.

[0011] 2. Through the cooperation of sliding groove, mating groove, limit bolt and fixing nut, the steel connector and the connecting plate can be detachably connected. This not only allows for quick installation and disassembly, improving construction efficiency, but also enhances the firmness of the horizontal limit component by embedding long steel bars inside the existing wall and locking the long steel bars with the fixing seat, thus providing good safety. Attached Figure Description

[0012] Figure 1 is a schematic diagram of a first embodiment of the horizontal limiting device for a force conversion bracket of an existing structure according to the present invention.

[0013] Figure 2 is an enlarged view of the structure of method one in part A of Figure 1;

[0014] Figure 3 is a schematic diagram of section AA in Figure 2;

[0015] Figure 4 is an enlarged view of the structure of method two in part A of Figure 1;

[0016] Figure 5 is a schematic diagram of the BB section of Figure 4;

[0017] Figure 6 is a schematic diagram of a second embodiment of the horizontal limiting device for a force conversion bracket of an existing structure according to the present invention.

[0018] Labeling Explanation: 1 Existing base plate, 2 Existing support unit, 3 Existing wall column, 4 Horizontal limiting component, 41 Fixed seat, 42 Connecting plate, 420 Sliding groove, 43 Limiting bolt, 430 Fixing nut, 44 Long steel bar, 45 Threaded locking component, 5 Hydraulic jack, 6 Temporary support, 7 Lateral limiting rod, 8 Steel connector, 800 Matching groove, 9 Existing floor slab, 10 Steel pad. Detailed Implementation

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

[0020] Figures 1-5 show a schematic diagram of one embodiment of the horizontal limiting device for a load-bearing conversion bracket in an existing structure provided by this utility model:

[0021] A horizontal limiting device for a load-bearing conversion support of an existing structure includes an existing base plate 1, an existing support 2 located above the existing base plate 1, and an existing wall column 3. The lower end of the existing wall column 3 is connected to the existing base plate 1, and the upper end of the existing wall column 3 is supported on the bottom of the existing support 2. A hydraulic jack 5 is installed above the existing base plate 1. A temporary support 6 for bearing the load of the existing support 2 is supported on the lifting part of the hydraulic jack 5. Several horizontal limiting components 4 are spaced apart in the height direction of the existing wall column 3. A transverse limiting rod 7 corresponding to each horizontal limiting component 4 is provided in the height direction of the temporary support 6. One end of the transverse limiting rod 7 is fixedly connected to the temporary support 6, and a steel connector 8 is fixedly provided at the other end. The steel connector 8 and the horizontal limiting components 4 are longitudinally slidingly engaged.

[0022] Furthermore, the hydraulic jack 5 can be selected as an ordinary jack or a hydraulic synchronous jack based on a programmable logic controller (PLC) depending on whether the temporary support 6 requires synchronous lifting force during actual construction.

[0023] The horizontal limiting component 4 includes a fixing seat 41 installed on the existing wall column 3, a connecting plate 42 welded to the fixing seat 41, and a limiting bolt 43 detachably connected between the steel connector 8 and the connecting plate 42. The connecting plate 42 has a longitudinally extending sliding groove 420, and the steel connector 8 has a mating groove 800 corresponding to the sliding groove 420. The threaded part of the limiting bolt 43 passes through the sliding groove 420 and the mating groove 800, and a fixing nut 430 is screwed onto the threaded part of the limiting bolt 43. Specifically, the fixing nut 430 engages the limiting bolt 43 only to prevent its threaded part from disengaging from the sliding groove 420 and the mating groove 800, without affecting the longitudinal relative movement between the steel connector 8 and the connecting plate 42.

[0024] The width of the sliding groove 420 and the mating groove 800 is greater than the diameter of the threaded portion of the limiting bolt 43, and less than the minimum width of the head of the limiting bolt 43 and the fixing nut 430.

[0025] The horizontal limiting component 4 also includes several long steel bars 44. One end of each long steel bar 44 is fixed inside the existing wall column 3, and the other end is provided with external threads. The fixing seat 41 is provided with several matching holes corresponding to each long steel bar 44. The threaded end of each long steel bar 44 extends out of the fixing seat 41 through the corresponding matching hole, and the threaded end of each long steel bar 44 is screwed with a threaded locking member 45 for locking the fixing seat 41.

[0026] Furthermore, the long steel bar 44 is fixed to one end inside the existing wall column 3 using a rebar anchoring construction process.

[0027] As shown in Figure 3, the transverse limiting rod 7 is an I-beam, and the steel connector 8 is welded and fixed to the web of the I-beam; as shown in Figure 5, the transverse limiting rod 7 may be a round steel pipe, and the steel connector 8 may be welded and fixed to the inner wall of the round steel pipe.

[0028] A steel pad 10 is also provided between the top side of the existing base plate 1 and the hydraulic jack 5. The steel pad 10 is used to distribute the load on the hydraulic jack 5, thereby preventing local damage to the existing base plate 1 and improving the safety and stability of the lifting process.

[0029] Furthermore, the steel pad 10 is selected based on the stress calculation, and the strength and thickness of the steel plate meet the calculation conditions to ensure that the steel pad 10 does not produce large deformation, while it can evenly transfer the upper load to the existing base plate 1.

[0030] Example 2:

[0031] As shown in Figure 6, this embodiment 2, based on embodiment 1, also includes an existing floor slab 9 located between the existing base plate 1 and the existing support part 2. The existing floor slab 9 has an opening at the support position of the temporary support 6 to allow the temporary support 6 to pass through.

[0032] The general usage of this utility model is as follows:

[0033] Step S1: Level the existing base plate 1 in the area where temporary supports 6 need to be installed.

[0034] Step S2: Place the steel pad 10 on the designed position of the existing base plate 1.

[0035] Step S3: Install the hydraulic jack 5 onto the steel pad 10, ensuring that it is in stable contact with the steel pad 10 to distribute the load and avoid localized damage.

[0036] Step S4: Place the temporary support 6 on the lifting part of the hydraulic jack 5 to ensure a stable connection between the temporary support 6 and the hydraulic jack 5; then fix the long steel bar 44 on the existing wall column 3 using the rebar installation process, and then fix the fixing seat 41 on the existing wall column 3 by the matching hole of the fixing seat 41, the threaded locking part 45 and the threaded end of the long steel bar 44.

[0037] Step S5: Weld transverse limiting rods 7 corresponding to each horizontal limiting component 4 in the height direction of the temporary support 6. Then, the steel connecting piece 8 and the connecting plate 42 are detachably connected by limiting bolts 43. The screw part of the limiting bolt 43 passes through the sliding groove 420 and the mating groove 800, and the screw part is prevented from disengaging from the sliding groove 420 and the mating groove 800 by tightening the fixing nut 430.

[0038] Step S6: Start the hydraulic jack 5 to lift the temporary support 6. The temporary support 6 gradually rises. Due to the limiting effect of the limiting bolt 43, the sliding groove 420 and the mating groove 800, the temporary support 6 can only move in the vertical direction, thereby maintaining the vertical force state and reducing the eccentric force, until the temporary support 6 bears the load of the existing support part 2 and completes the force conversion of the existing structure.

[0039] 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 horizontal limiting device for a load-bearing conversion support of an existing structure, comprising an existing base plate (1), an existing support section (2) located above the existing base plate (1), and an existing wall column (3), wherein the lower end of the existing wall column (3) is connected to the existing base plate (1), the upper end of the existing wall column (3) is supported on the bottom of the existing support section (2), a hydraulic jack (5) is installed above the existing base plate (1), and a temporary support (6) for bearing the load of the existing support section (2) is provided on the lifting part of the hydraulic jack (5), characterized in that: The existing wall column (3) is provided with several horizontal limiting components (4) at intervals in the height direction. The temporary support (6) is provided with transverse limiting rods (7) corresponding to each horizontal limiting component (4) in the height direction. One end of the transverse limiting rod (7) is fixedly connected to the temporary support (6), and the other end is fixedly provided with a steel connector (8). The steel connector (8) and the horizontal limiting components (4) slide longitudinally together.

2. The horizontal limiting device for the load-bearing conversion bracket of an existing structure according to claim 1, characterized in that: The horizontal limiting component (4) includes a fixing seat (41) installed on the existing wall column (3), a connecting plate (42) welded to the fixing seat (41), and a limiting bolt (43) detachably connected between the steel connector (8) and the connecting plate (42); the connecting plate (42) has a longitudinally extending sliding groove (420), the steel connector (8) has a mating groove (800) corresponding to the sliding groove (420), the threaded part of the limiting bolt (43) passes through the sliding groove (420) and the mating groove (800), and a fixing nut (430) is screwed on the threaded part of the limiting bolt (43).

3. The horizontal limiting device for the load-bearing conversion bracket of an existing structure according to claim 2, characterized in that: The width of the sliding groove (420) and the mating groove (800) is greater than the diameter of the threaded part of the limiting bolt (43) and less than the minimum width of the head of the limiting bolt (43) and the fixing nut (430).

4. The horizontal limiting device for the load-bearing conversion bracket of an existing structure according to claim 2, characterized in that: The horizontal limiting component (4) also includes several long steel bars (44), one end of which is fixed inside the existing wall column (3), and the other end of which is provided with external threads. The fixing seat (41) is provided with several matching holes corresponding to each long steel bar (44). The threaded end of each long steel bar (44) extends out of the fixing seat (41) through the corresponding matching hole, and the threaded end of each long steel bar (44) is provided with a threaded locking member (45) for locking the fixing seat (41).

5. The horizontal limiting device for the load-bearing conversion bracket of an existing structure according to claim 1, characterized in that: The transverse limiting rod (7) is an I-beam, and the steel connector (8) is welded and fixed to the web of the I-beam; or the transverse limiting rod (7) is a round steel pipe, and the steel connector (8) is welded and fixed to the inner wall of the round steel pipe.

6. The horizontal limiting device for the load-bearing conversion bracket of an existing structure according to claim 1, characterized in that: It also includes an existing floor slab (9) located between the existing base plate (1) and the existing support section (2), wherein the existing floor slab (9) has an opening at the support position of the temporary support (6) to allow the temporary support (6) to pass through.

7. The horizontal limiting device for a load-bearing conversion support for an existing structure according to any one of claims 1 to 6, characterized in that: A steel pad (10) is also provided between the top side of the existing base plate (1) and the hydraulic jack (5).

Images