Segmented jacking device with alternately stressed steel slideways and column cores and construction method therefor

Abstract

The present invention relates to a segmented jacking device with alternately stressed steel slideways and column cores and a construction method therefor, which are used for jacking up an upper structure. The jacking device comprises steel slideways, suspended lower corbels and hydraulic jacks; the bottoms of the steel slideways are anchored to lower structural columns or a foundation; the suspended lower corbels are fixed to the steel slideways; both sides of each suspended lower corbel are provided with the hydraulic jacks; column cores are provided in the steel slideways; an upper corbel or tray beam is installed on the upper structure; the hydraulic jacks are located below the upper corbel or tray beam; when the steel slideways are stressed, the load of an upper structure is transferred to the hydraulic jacks by means of the upper corbel or tray beam, then transferred to the steel slideways by means of the suspended lower corbels, and finally transferred to a lower structure or foundation; when the column cores are stressed, the load of the upper structure is transferred to the lower structure or foundation by means of the column cores.

Description

Steel slideway and column core alternately loaded segmented jacking equipment and construction method thereof CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] The embodiments of this application are based on and claim the priority of Chinese patent application with application number 202410073797.1 and application date January 18, 2024. The entire contents of the Chinese patent application are hereby introduced into the embodiments of this application as a reference. Technical Field

[0002] The present invention relates to the field of building technology, and more particularly to a segmented lifting device in which a steel slideway and a column core are alternately stressed, and a construction method thereof. Background Art

[0003] In recent years, the stock of existing buildings has grown significantly, while the scale of new construction has shrunk dramatically. Building renovation has become a key focus of my country's future construction industry. Old residential communities are a typical example of this existing market. These communities are generally older and lack supporting facilities and community services. Some of these communities are no longer able to meet the current needs of residents, with problems such as difficulty finding parking, lack of elevators, lack of community-based elderly care, and a lack of other public social services.

[0004] The most crucial issue in building renovation is how to create space within existing structures. By lifting the existing building, one or two floors can be added to the existing residential complex. Connecting the buildings with a new framework creates a new, fully enlarged space that encompasses the entire complex. This space can accommodate ample parking, a community nursing home, a childcare center, public restrooms, and more. The existing upper structures can then undergo exterior wall renovations, plumbing, electrical, and landscaping improvements, and elevators can be installed. This approach can transform old residential communities into modern, functional communities, completely resolving common issues faced by these communities.

[0005] However, worldwide, traditional jacking technology is expensive, takes a long time to complete, and cannot be applied and promoted on a large scale. Therefore, a new method of jacking and adding floors that is efficient and economical is needed to better carry out the renovation of building floors. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a segmented jacking device with steel slideways and column cores subjected to alternating forces and a construction method thereof, which can achieve the purpose of adding floors to a building.

[0007] According to a first aspect of the present invention, there is provided a segmented jacking device with steel slideways and column cores alternately loaded, for jacking up a superstructure, comprising a steel slideway, a suspended lower bracket and a hydraulic jack;

[0008] The bottom of the steel slide is anchored to the lower structure column or foundation, and the suspended lower corbel is fixed to the steel slide. Hydraulic jacks are set on both sides of the suspended lower corbel. A column core is set inside the steel slide. The upper corbel or pallet beam is installed on the upper structure, and the hydraulic jack is located below the upper corbel or pallet beam.

[0009] When the steel slide is under stress, the upper structure load is transferred to the hydraulic jack through the upper corbel or pallet beam, then transferred to the steel slide through the suspended lower corbel, and finally to the lower structure or foundation; when the column core is under stress, the upper structure load is transferred to the lower structure or foundation through the column core.

[0010] According to a second aspect of the present invention, a construction method for a segmented jacking device in which a steel slideway and a column core are alternately loaded is provided, comprising the following steps:

[0011] Step 1: Determine the lifting position and height;

[0012] Step 2: Remove the wall of the building's jacking layer and install the steel slideway;

[0013] Step 3: Connect the digital synchronous lifting equipment dedicated to lifting and debug it;

[0014] Step 4: Before cutting the column, load the hydraulic jack according to the theoretically calculated pressure value, and then cut off the upper and lower structures at the designed position;

[0015] Step 5. Use digital synchronous jacking equipment to jack up. After the hydraulic jack is used to jack up the fixed modulus, place the first concrete pad in the center of the column. The hydraulic jack is retracted. The column core formed by the stacked concrete pads is alternately stressed. A concrete working pad is installed under the hydraulic jack. The hydraulic jack is jacked up again. Then the steel slide is alternately stressed. After jacking up the fixed modulus, the second concrete engineering pad is installed in the column core. This is repeated. When the number of concrete engineering pads superimposed on the column core reaches a certain number, the column core formed by the stacked concrete pads is alternately stressed. The steel slide is partially welded and sealed with an outer sealing steel plate to form a steel pipe column. Fine stone concrete is poured in the gap between the steel pipe column and the column core to form a combined steel tube concrete column. The first section of jacking is completed.

[0016] Step 6: For concrete frame structures, when the jacking reaches a certain height, timely adjust the length of the retractable steel support and the position of the steel clamp to ensure that they do not affect adjacent components; for masonry structures, after the jacking reaches a certain height, the retractable steel support and steel clamp can be installed to ensure that the jacking process resists lateral forces;

[0017] Step 7: Repeat the operation of step 5 and continue to carry out segmented jacking until the designed jacking height is reached;

[0018] Step 8: Connect the top of the composite steel tube concrete column formed by jacking to the upper structure, and remove the hydraulic jack, the suspended lower bracket and the upper bracket;

[0019] Step 9: Cast the beams and slabs of the new layer, and complete the jacking and adding of the layer.

[0020] The steel slideway and column core alternately loaded segmented jacking equipment and its construction method of the present invention have the following beneficial effects:

[0021] 1. The present invention utilizes steel slideways and high-precision and high-strength concrete pads to alternately bear stress on the column core and perform segmented jacking, which is the core principle of the steel slideway jacking technology. This makes the jacking technology project safer to implement, the jacking efficiency higher, the construction period shorter, the jacking cost lower, and the economic benefits significant.

[0022] 2. The present invention can be used to lift and add floors to existing buildings from the bottom to increase the space and transform them into parking lots or other commercial places. The implementation of this technology has no effect on the decoration and decoration of the upper part of the building and does not require additional structural reinforcement, so it is highly feasible. When used for lifting and adding floors in old communities, it can completely solve the problem of insufficient space, effectively improve the high quality of life of residents, and have significant social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0024] FIG1 is a schematic diagram of the force of the steel slideway disclosed in the present invention;

[0025] FIG2 is a schematic diagram showing the stress of a column core formed by stacking high-strength and high-precision concrete pads disclosed in the present invention;

[0026] FIG3 is a plan view of the steel slideway underpinning system and load-bearing components disclosed in the present invention;

[0027] FIG4 is a vertical view showing the technical principle of the column core composed of a steel slideway and high-precision and high-strength concrete pads disclosed in the present invention, which is alternately stressed and lifted in sections. DETAILED DESCRIPTION

[0028] The following will be combined with 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.

[0029] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described below with reference to the accompanying drawings.

[0030] As shown in Figures 1-2, the steel slide and column core alternating force segmented jacking equipment of the present invention utilizes the technology of alternating force and segmented jacking of the steel slide 1 and the column core 61 stacked with high-precision and high-strength concrete pads, which is the core principle of the steel slide jacking technology. Figure 1 is a schematic diagram of the force on the steel slide, and Figure 2 is a schematic diagram of the force on the column core stacked with high-strength and high-precision concrete pads. When the steel slide 1 is subjected to force, the load of the upper structure 200 is transferred to the hydraulic jack 4 through the upper bracket or pallet beam 3, and then transferred to the steel slide 1 through the suspended lower bracket 2, and finally transferred to the lower structure or foundation 300; when the column core 61 is subjected to force, the load of the upper structure 200 is transferred to the lower structure or foundation 300 through the column core 61 stacked with high-precision and high-strength concrete pads.

[0031] As shown in Figure 3, the present invention discloses a segmented jacking device that alternately supports steel slides and column cores. Figure 3 is a plan view of the steel slide support system and load-bearing components. The steel slide support system, consisting of a steel slide 1, a suspended lower corbel 2 and tie rods 21, an upper corbel or pallet beam 3, a hydraulic jack 4, a retractable steel support 5, and a steel clamp 51, supports and lifts the building's superstructure. The steel slide 1 is composed of four angle steels 11, the bottom of the angle steel 11 is anchored to the lower structure column or foundation 300, and the upper part of the angle steel 11 is constrained by a steel clamp 51; the suspended lower corbel 2 is suspended on the connecting plate 8 between the steel slide angle steels 11 by a hook, and the two suspended lower corbels 2 are connected by a pull rod 21; a hydraulic jack 4 is arranged on each side of each suspended lower corbel 2, and a total of 4 hydraulic jacks 4 are arranged; when the upper structure 200 is masonry, a new pallet beam 3 is built on the upper part of the cross-section; when the upper structure 200 is a concrete frame structure, the upper column of the cross-section is installed with a corbel 3; a retractable steel support 5 is installed between the steel slides 1 of adjacent axis networks through a steel clamp 51, thereby playing a role in resisting lateral forces and horizontally constraining the upper structure 200.

[0032] As shown in FIG4 , in combination with FIG1 and FIG2 , the present invention discloses a construction method for a segmented jacking device in which a steel slideway and a column core are alternately stressed, including the following process steps:

[0033] Step 1: Determine the jacking position and height based on functional requirements. Reinforce the original structure and foundation if necessary.

[0034] Step 2: Remove the walls of the building's jacking layer and install the steel slideway 1. For concrete frame structures, install the suspended lower bracket 2 and tie rods 21, upper bracket 3, hydraulic jacks 4, steel clamps 51, and retractable steel supports 5. For masonry structures, build a new pallet beam 3 and install hydraulic jacks 4 between the pallet beam 3 and the foundation 300.

[0035] Step 3: Connect the digital synchronous jacking equipment dedicated to jacking and debug it.

[0036] Step 4: Before cutting the column, load the hydraulic jack 4 according to the theoretically calculated pressure value. Then cut the upper and lower structures at the designed position and insert a thin steel plate at the fracture.

[0037] Step 5. Use digital synchronous jacking equipment to jack. After the hydraulic jack 4 jacks a certain fixed modulus, for example 150mm, place the first high-precision and high-strength concrete pad 6 in the center of the column. The hydraulic jack 4 retracts and alternates to the column core 61 composed of stacked high-precision and high-strength concrete pads to bear the force. Install a concrete working pad 7 under the hydraulic jack 4. The hydraulic jack 4 jacks again and alternates to the steel slideway 1 to bear the force. After jacking the fixed modulus, install the second concrete engineering pad 6 on the column core 61. Repeat this process. When the concrete engineering pads 6 stacked on the column core 61 reach a certain number, such as 6 moduli and 900mm height, alternate to the column core 61 composed of stacked high-precision and high-strength concrete pads to bear the force. Use the outer sealing steel plate 81 to partially weld and seal the steel slideway 1 into a steel pipe column. Pour fine stone concrete 9 into the gap between the steel pipe column and the column core 61 to form a combined steel tube concrete column 100, thereby completing the first section of jacking.

[0038] Step 6. For concrete frame structures, when jacking to a certain height, the length of the retractable steel support 5 and the position of the steel hoop 51 should be adjusted in time to ensure that they do not affect adjacent components; for masonry structures, after jacking to a certain height, the retractable steel support 5 and steel hoop 51 can be installed to ensure that the lateral force can be resisted during the jacking process.

[0039] Step 7. Repeat the operation of step 5 and continue to carry out segmented jacking until the designed jacking height is reached.

[0040] Step 8: Connect the top of the composite steel tube concrete column 100 formed by jacking to the upper structure 200. Remove the hydraulic jack 4, the suspended lower bracket 2, the upper bracket 3, etc.

[0041] Step 9: Cast the beams and slabs of the new layer, and complete the jacking and adding of the layer.

[0042] The construction method and process steps adopt a large-scale synchronous jacking equipment set specially used for jacking. The equipment requires the synchronous displacement error of the hydraulic jack to be controlled to be no more than 1mm, so as to ensure the safety and reliability of the superstructure jacking process.

[0043] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are protected by the present invention.

Claims

1. A steel slideway and column core alternately stressed sectional jacking equipment for jacking up the upper structure, characterized in that, It includes a steel slideway, a suspended lower bracket and a hydraulic jack; The bottom of the steel slideway is anchored to the lower structure column or foundation. The suspended lower bracket is fixed on the steel slideway. Hydraulic jacks are arranged on both sides of the suspended lower bracket. A column core is arranged inside the steel slideway. An upper bracket or a tray beam is installed on the upper structure. The hydraulic jacks are located below the upper bracket or the tray beam; When the steel slideway is stressed, the load of the upper structure is transmitted to the hydraulic jacks through the upper bracket or the tray beam, then transmitted to the steel slideway through the suspended lower bracket, and finally transmitted to the lower structure or foundation; when the column core is stressed, the load of the upper structure is transmitted to the lower structure or foundation through the column core.

2. The steel slideway and column core alternating force-bearing segmented jacking equipment according to claim 1, characterized in that, The steel slideway is composed of four angle steels. The angle steels are connected by connecting plates. The bottom of the angle steels is anchored to the lower structure column or foundation. The upper parts of the angle steels are restricted by steel hoops.

3. The steel slideway and column core alternately stressed sectional jacking equipment according to claim 2, wherein, The suspended lower bracket is suspended on the connecting plate by a hook.

4. The steel slideway and column core alternately stressed sectional jacking equipment according to claim 1, characterized in that, Two suspended lower brackets are connected by a pull rod.

5. The steel slideway and column core alternately stressed segmented jacking equipment according to claim 1, characterized in that, Retractable steel supports are installed between adjacent steel slideways by steel hoops.

6. The steel slideway and column core alternately stressed sectional jacking equipment according to claim 1, characterized in that, The column core is formed by stacking multiple concrete pads.

7. A construction method of the steel slideway and column core alternating stress segmented jacking equipment according to claim 1, characterized in that, It includes the following steps: Step 1: Determine the jacking position and height; Step 2: Demolish the wall of the jacking layer of the building and install the steel slideway; Step 3: Connect the digital synchronous jacking equipment dedicated for jacking and conduct debugging; Step 4: Before cutting the column, load the hydraulic jacks according to the theoretically calculated pressure value, and then cut off the upper and lower structures at the designed position; Step 5: Use the digital synchronous jacking equipment to conduct jacking. Place the first concrete pad at the center of the column after the hydraulic jacks jack up a fixed modulus. The hydraulic jacks retract. Alternate until the column core formed by the stacked concrete pads is stressed. Install a concrete working pad under the hydraulic jacks. The hydraulic jacks jack up again. Then alternate until the steel slideway is stressed. After jacking a fixed modulus, install the second concrete engineering pad in the column core. Repeat this process. When the number of the concrete engineering pads stacked in the column core reaches a certain amount, alternate until the column core formed by the stacked concrete pads is stressed. Use an external sealing steel plate to locally weld and seal the steel slideway into a steel pipe column. Pour fine aggregate concrete into the gap between the steel pipe column and the column core to form a composite steel pipe concrete column. Thus, the jacking of the first section is completed; Step 6: For a concrete frame structure, when jacked to a certain height, timely adjust the length of the retractable steel support and the position of the steel hoop to ensure that there is no mutual influence with adjacent components; for a masonry structure, after jacking to a certain height, the retractable steel support and the steel hoop can be installed to ensure resistance to lateral forces during the jacking process; Step 7: Repeat the operation in Step 5, that is, continuously carry out sectional jacking until the designed jacking height is reached; Step 8: Connect the top of the composite steel pipe concrete column formed by jacking to the upper structure, and remove the hydraulic jacks, the suspended lower brackets and the upper brackets; Step 9: Pour the beams and slabs of the newly added layer, and the jacking and adding layer is completed.

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