Ground-free support equipment and construction method for prefabricated structural floor

Abstract

The present invention discloses a ground-free support equipment for assembled structural floor, which relates to the field of building construction technology, including: a supporting steel truss, supporting members symmetrically arranged at both ends of the supporting steel truss, and a lifting assembly arranged between the supporting steel truss and the supporting member, the supporting member being connected to the bottom of the supporting steel truss by fixing bolts; a heating and softening gasket is provided on the upper edge of the bottom of the supporting steel truss, and the supporting steel truss is separated from the prefabricated board by heating and softening the heating and softening gasket, so as to realize the disassembly and reuse of the supporting member, the lifting assembly and the supporting steel truss. The present invention can effectively improve the local bearing capacity and overall stability of the device through accurate calculation and reasonable arrangement of supporting members, and the height of the supporting steel truss can be adjusted through the lifting assembly, thereby achieving the purpose of adjusting the prefabricated board above the supporting steel truss.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to ground-free support equipment for assembled structural floor slabs and a construction method thereof. Background Art

[0002] In prefabricated building structure systems, the installation and construction of floor slabs usually requires the installation of temporary supports to ensure stability and safety during the construction process. However, traditional temporary support devices have many problems. First of all, traditional support devices usually require a large amount of steel or wood, which not only increases construction costs, but also makes the transportation and storage of materials more cumbersome. At the same time, the installation and removal of these support devices require a lot of manpower and time, which seriously affects construction efficiency. During the construction process, since the support structure adopts a ground support method, the support structure needs to occupy a large space, which will interfere with the layout of the construction site and other construction processes. Moreover, the stability and reliability of traditional supports often depend on the experience and operating level of the construction workers, and there is a certain degree of uncertainty. Therefore, there are now some methods of constructing floor slabs using support-free structures on the market.

[0003] For example, the Chinese patent with patent number ZL201920167703.1 discloses a support-free prefabricated frame structure system, which includes: precast concrete columns, precast concrete composite beams and precast prestressed concrete slabs. The precast concrete composite beams are overlapped in the grooves of the corbels on the precast concrete columns in the length direction, and the precast prestressed concrete slabs are overlapped on the ears of the precast concrete composite beams. Through the above structure, a support-free prefabricated concrete frame structure system that meets the existing structural standards is formed. This solution can eliminate the need for traditional support erection during construction and achieve the goal of rapid construction. This solution can well control the project management goals such as construction efficiency, quality, and progress of prefabricated buildings, and achieve better project development effects.

[0004] The above patent provides a support-free prefabricated frame structure system, which does indeed eliminate the support system of traditional floor slab construction. However, the existing support-free prefabricated frame structure system relies too much on precast concrete composite beams, and it is necessary to set multiple precast concrete composite beams at a certain distance in the direction of precast slab laying. If too few precast concrete composite beams are set, the precast slabs will not have enough support force, and when concrete is subsequently poured on the precast slabs, the precast slabs will not be able to bear the weight of the concrete and will break. At the same time, setting too many precast concrete composite beams in the building will affect the aesthetics of the building, and because the precast concrete composite beams cannot be disassembled and reused after the floor slab construction is completed, the construction cost is greatly increased. At the same time, the existing support-free structure is also inconvenient for fine-tuning the height of the precast slabs. Summary of the Invention

[0005] The purpose of the present invention is to provide a ground-support-free equipment and construction method for prefabricated structural floor slabs, so that during the construction of the floor slabs, there is no need to use ground support to support the floor slabs. At the same time, the support-free structure can be disassembled and reused, is not restricted by building space, and does not require the prefabrication of a large number of precast concrete composite beams, thereby reducing construction costs.

[0006] In order to achieve the above-mentioned object, according to one aspect of the present invention, there is provided a ground-free support device for a prefabricated structural floor, comprising:

[0007] Supporting steel trusses;

[0008] Support members symmetrically arranged at both ends of the supporting steel truss, the support members being connected to the bottom of the supporting steel truss via fixing bolts;

[0009] A lifting assembly is arranged between the supporting steel truss and the supporting member. A heating and softening gasket is provided on the bottom of the supporting steel truss along the upper edge of the lifting assembly. By heating and softening the heating and softening gasket, the supporting steel truss is separated from the prefabricated panel, thereby realizing the disassembly and reuse of the supporting member, the lifting assembly and the supporting steel truss.

[0010] Furthermore, the lifting assembly is configured as a lifting adjuster, and the lifting adjuster includes a plug-in rod;

[0011] The heating and softening gasket is arranged on the plug-in rod, and a hexagonal joint is arranged on the side surface of the bottom of the plug-in rod.

[0012] Furthermore, the lifting adjuster includes an adjusting screw;

[0013] A thread groove is provided at the bottom end of the plug-in rod, and the thread groove is connected to the adjusting screw.

[0014] Furthermore, a bottom rod is provided at the bottom of the adjusting screw, and a plug connector is provided at the bottom end of the bottom rod.

[0015] Furthermore, the lifting component is a lifting screw, the top end of the lifting screw is set as a support surface, the bottom end is provided with a driving joint, and the heating and softening gasket is sleeved on the lifting screw.

[0016] Furthermore, the support member is L-shaped, a nut is provided on its upper surface, and a threaded hole penetrating the support member is provided in the middle of the nut.

[0017] Furthermore, the two ends of the support member are connected by an oblique support rod to increase the strength of the support member.

[0018] Furthermore, a plurality of through holes are provided on one end of the support member that is in contact with the assembled structural component, and the through holes match the bolt sleeves pre-embedded in the assembled structural component.

[0019] Furthermore, a socket is provided on the top of the support member.

[0020] Furthermore, the heat-softening gasket is made of hydrocarbon or vinyl thermoplastic containing polar genes.

[0021] Furthermore, the heating and softening gasket contains an electric heating metal sheet or an electric heating metal wire.

[0022] Furthermore, a plurality of triangular support plates are evenly arranged on the inner side of the supporting steel truss.

[0023] According to a second aspect of the present invention, a method for constructing a prefabricated structural floor without ground support is provided, which is implemented using the prefabricated structural floor without ground support equipment, and includes the following steps:

[0024] S100, calculating the minimum bending strength required for the supporting steel truss, and processing the supporting steel truss with a bending strength greater than the minimum bending strength based on the minimum bending strength;

[0025] S200: During the prefabrication process of the assembled structural components in the factory, the embedded bolt sleeves are positioned and laid out in advance, and the assembled structural components are prefabricated. At the same time, a batch of prefabricated panels required for use are prefabricated in the factory.

[0026] S300, transporting the processed prefabricated structural components, supporting steel trusses, and prefabricated panels to the location designated by the builder, and performing protective treatment on the prefabricated structural components and supporting steel trusses;

[0027] S400: A plurality of through holes are provided on one end of the support member that is in contact with the assembled structural member, and the through holes are aligned with the embedded bolt sleeves. Subsequently, a plurality of fixing bolts are sequentially passed through the through holes of the support member and screwed into the embedded sleeves.

[0028] S500, connect the lifting assembly vertically upward to the support frame, slowly rotate the lifting assembly, adjust the lifting assembly to a predetermined height, and then place a heated and softened gasket;

[0029] S600. Lift the supporting steel truss using a lifting device, and align both ends of the supporting steel truss with the lifting assembly so that both ends of the supporting steel truss are installed on the lifting assembly;

[0030] S700. Use a lifting device to lift the precast panels and install them on the upper surfaces of the assembled structural members and the supporting steel trusses. Then, tie the steel mesh on the precast panels and pour concrete.

[0031] S800. After the concrete is poured and solidified, heat the heat-softened gasket first to soften it, so that the supporting steel truss moves down, and then disassemble the lifting assembly. After disassembling the lifting assembly, disassemble the supporting steel truss, and finally disassemble the support parts, and store the disassembled parts in categories.

[0032] Furthermore, the minimum bending strength of the supporting steel truss calculated in step S100 is:

[0033] The cross-section of the supporting steel truss is a rectangular structure. The width of the supporting steel truss is b, the height is h, and the length is determined according to the span of the floor slab. The calculation formula for the bending strength of the load-bearing beam is:

[0034] ,

[0035] Where: M is the bending moment and W is the bending coefficient.

[0036] Furthermore, the bending coefficient W is:

[0037] ,

[0038] Where: b is the width of the supporting steel truss, h is the height of the supporting steel truss.

[0039] Furthermore, in the process of fixing the support member by fixing bolts in step S400, the support member needs to be fixed at a specified height on the surface of the assembled structural member. After the support member is fixed, check whether the support member has any shaking and whether the fixing bolts are tightened.

[0040] Furthermore, after the supporting steel truss is installed in step S600, the overall levelness is checked with a spirit level. If it is skewed, the lifting assembly is adjusted to ensure that the overall levelness of the steel truss meets the requirements.

[0041] Furthermore, in step S600, when both ends of the supporting steel truss are mounted on the lifting assembly, it is necessary to ensure that the top of the lifting assembly is lower than the top of the supporting steel truss, so as to ensure that the supporting steel truss moves downward after the heated and softened gasket is heated and softened.

[0042] Furthermore, after the prefabricated panels are hoisted in step S700, the heights of the prefabricated panels are adjusted using a lifting assembly so that the upper surfaces of the plurality of prefabricated panels are in the same plane.

[0043] Furthermore, each component disassembled in step S800 should be subjected to rust prevention treatment before storage to avoid a large amount of rust after long-term storage.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] 1. The present invention pre-embeds multiple bolt sleeves in prefabricated structural members. After the prefabricated structural members are installed, support members are installed in the pre-embedded bolt sleeves on the wall. The support members are arranged in a row on the prefabricated structural members, and a lifting assembly is installed on the support members. The top of the lifting assembly is connected to a supporting steel truss, and the ends of the supporting steel truss are respectively mounted on mutually aligned support members on two prefabricated structural members. The lifting assembly can be used to adjust the height of the supporting steel truss, thereby achieving the purpose of adjusting the prefabricated panels above the supporting steel truss. At the same time, the support members, lifting assembly, and supporting steel truss can all be disassembled and reused, achieving the purpose of saving construction costs.

[0046] 2. The lifting assembly of the present invention is provided with a heating and softening gasket, which is convenient for heating and softening the heating and softening gasket when disassembling the supporting steel truss, so that the supporting steel truss is separated from the prefabricated plate, which facilitates the disassembly and reuse of the supporting steel truss.

[0047] 3. The supporting steel trusses of the present invention are made of high-strength steel. Through reasonable structural design and calculation, they can meet the load-bearing requirements during floor construction. There is no need to set up traditional temporary supports, saving construction costs and time.

[0048] 4. The present invention can effectively improve the local bearing capacity and overall stability of the device through precise calculation and reasonable arrangement of support members, thereby ensuring the safety and reliability of the construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a schematic diagram of the structure of the various components of the ground-free support equipment of the present invention;

[0050] Figure 2 This is a schematic diagram of the structure of the supporting steel truss of the present invention, in conjunction with the lifting screw and the supporting member;

[0051] Figure 3 It is a schematic diagram of the structure of the supporting steel truss of the present invention, which is partially enlarged with the lifting screw and the supporting member;

[0052] Figure 4 This is a schematic structural diagram of a support member according to embodiment 1 of the present invention;

[0053] Figure 5 It is a structural schematic diagram of the lifting screw of the present invention;

[0054] Figure 6 is a schematic structural diagram of a support member according to embodiment 2 of the present invention;

[0055] Figure 7 It is a structural schematic diagram of the lifting regulator of the present invention;

[0056] Figure 8 It is a flow chart of the construction method of the present invention.

[0057] In the figure: 1. Prefabricated structural member; 11. Embedded steel; 2. Fixing bolt; 21. Bolt sleeve; 3. Support member; 31. Nut; 32. Diagonal brace; 33. Through hole; 34. Socket; 4. Lifting screw; 41. Heat-softened gasket; 42. Drive joint; 5. Support steel truss; 51. Triangular support plate; 6. Prefabricated plate; 7. Lifting adjuster; 71. Connecting rod; 711. Hexagonal joint; 712. Threaded groove; 72. Adjusting screw; 721. Bottom rod; 722. Connector. DETAILED DESCRIPTION

[0058] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0059] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0060] Example 1

[0061] like Figure 1 and Figure 5As shown, a ground-free support device for prefabricated structural floor slabs includes a prefabricated structural member 1 and a prefabricated panel 6, as well as support members 3. The prefabricated structural member 1 is provided with multiple blocks, and the prefabricated structural member 1 is used to assemble the walls of a building. A row of support members 3 is aligned at the tops of two opposing prefabricated structural members 1. The support members 3 are fixed to the concrete wall via fixing bolts 2. The support members 3 are used to support and support other components to facilitate the support and use of the floor slabs. A lifting assembly is installed on the support members 3, and the lifting assembly is arranged vertically upward. Support steel trusses 5 are provided above the aligned support members 3 on the two prefabricated structural members 1. The lifting assembly is used to install the support steel trusses 5 and ensure the stability of the support steel trusses 5. The two ends of the support steel trusses 5 are respectively connected to the top of the lifting assembly on the support member 3. The support steel trusses 5 and the lifting assembly are detachably connected. The support steel trusses 5 are used to support the prefabricated panel 6 and ensure the stability of the prefabricated panel 6. A heating and softening gasket 41 is installed at the bottom of the supporting steel trusses 5 along the upper edge of the lifting assembly. Heating methods include resistance heating and electromagnetic induction heating. This heating and softening gasket 41 facilitates heating during disassembly of the supporting steel trusses 5, thereby softening the gasket 41 and facilitating assembly and disassembly of the supporting steel trusses 5. Precast panels 6 are placed on two adjacent prefabricated structural members 1, with their bottoms affixed to the supporting steel trusses 5. This structure ensures the stability of the precast panels 6.

[0062] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a pre-buried steel section 11 is embedded in the top end of the prefabricated structural member 1, and the pre-buried steel section 11 is used to be connected to the adjacent prefabricated structural member 1 or precast concrete beam; the positions where the support members 3 are installed on the side of the prefabricated structural member 1 are pre-buried with bolt sleeves 21, and the bolt sleeves 21 are used to be threadedly connected to the fixing bolts 2.

[0063] like Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, the support member 3 is L-shaped, and the upper surface of the support member 3 is set horizontally. This structure is convenient for the support member 3 to stably support the supporting steel truss 5 horizontally. A nut 31 is provided on the upper surface of the support member 3, and a threaded hole is provided in the middle of the nut 31 to pass through the support member 3. This structure is convenient for the support member 3 to be threadedly connected to the lifting screw 4. The two ends of the support member 3 are connected by a diagonal brace 32 to increase the strength of the support member 3. A plurality of through holes 33 are provided at one end of the support member 3 that fits the assembled structural component 1, and the through holes 33 are aligned with the pre-embedded bolt sleeves 21 on the assembled structural component 1. This structure is convenient for the fixing bolts 2 to pass through the support member 3 and be connected to the bolt sleeves 21, thereby achieving the purpose of installing the support member 3 by the fixing bolts 2. The lifting component is set as the lifting screw 4, and the top of the lifting screw 4 is set as the support surface. The support surface is convenient for resting against the inner side of the supporting steel truss 5, which is convenient for supporting the stability of the steel truss 5. The bottom end of the lifting screw 4 is provided with a drive joint 42 for rotating the drive screw. The support surfaces at the top of each lifting screw 4 are all on the same plane, which ensures that the upper surface of the supporting steel trusses 5 are on the same plane, thereby facilitating stable support of the precast panels 6. Heat-softening gaskets 41 are mounted on the lifting screw 4. Heat-softening gaskets 41 are used to heat and soften the heat-softening gaskets 41 when disassembling the supporting steel trusses 5, facilitating the disassembly and assembly of the supporting steel trusses 5.

[0064] like Figure 5 As shown, the heating and softening gasket 41 is a hydrocarbon or vinyl thermoplastic containing polar genes. The heating and softening gasket 41 contains an electric heating metal sheet or electric heating metal wire. The metal sheet or metal wire is connected to an external power cord to achieve heating and softening. All the heating and softening gaskets 41 can be connected in series as a whole to quickly soften the gaskets at different positions of the floor slab.

[0065] like Figure 3 As shown, multiple triangular support plates 51 are evenly spaced on the inner side of the supporting steel truss 5. These support plates 51 are used to support the interior of the supporting steel truss 5, ensuring sufficient strength. Furthermore, both ends of the supporting steel truss 5 are sleeved onto the top of the lifting screw 4, and the bottom of the supporting steel truss 5 is attached to the upper surface of the heated and softened gasket 41. This structure ensures sufficient stability of the supporting steel truss 5.

[0066] Example 2

[0067] like Figure 1 、 Figure 5 and Figure 6As shown, a ground-free support device for prefabricated structural floor slabs includes a prefabricated structural member 1 and a prefabricated panel 6, as well as support members 3. The prefabricated structural member 1 is provided with multiple blocks, and the prefabricated structural member 1 is used to assemble the walls of a building. A row of support members 3 is aligned at the tops of two opposing prefabricated structural members 1. The support members 3 are fixed to the concrete wall via fixing bolts 2. The support members 3 are used to support and support other components to facilitate the support and use of the floor slabs. A lifting assembly is installed on the support members 3, and the lifting assembly is arranged vertically upward. Support steel trusses 5 are provided above the aligned support members 3 on the two prefabricated structural members 1. The lifting assembly is used to install the support steel trusses 5 and ensure the stability of the support steel trusses 5. The two ends of the support steel trusses 5 are respectively connected to the top of the lifting assembly on the support member 3. The support steel trusses 5 and the lifting assembly are detachably connected. The support steel trusses 5 are used to support the prefabricated panel 6 and ensure the stability of the prefabricated panel 6. A heating and softening gasket 41 is installed at the bottom of the supporting steel trusses 5 along the upper edge of the lifting assembly. Heating methods include resistance heating and electromagnetic induction heating. This heating and softening gasket 41 facilitates heating during disassembly of the supporting steel trusses 5, thereby softening the gasket 41 and facilitating assembly and disassembly of the supporting steel trusses 5. Precast panels 6 are placed on two adjacent prefabricated structural members 1, with their bottoms affixed to the supporting steel trusses 5. This structure ensures the stability of the precast panels 6.

[0068] like Figure 1 、 Figure 2 and Figure 3 As shown, a pre-buried steel section 11 is embedded in the top end of the prefabricated structural member 1, and the pre-buried steel section 11 is used to be connected to the adjacent prefabricated structural member 1 or precast concrete beam; the positions where the support members 3 are installed on the side of the prefabricated structural member 1 are pre-buried with bolt sleeves 21, and the bolt sleeves 21 are used to be threadedly connected to the fixing bolts 2.

[0069] like Figure 2 、 Figure 3 and Figure 7As shown, the support member 3 is L-shaped, and a plurality of through holes 33 are provided at one end of the support member 3 that fits the assembled structural member 1; this structure facilitates the installation of the support member 3 on the assembled structural member 1. The two ends of the support member 3 are connected by a diagonal brace 32; this structure ensures that the support member 3 is sufficiently stable. A socket 34 is provided on the top of the support member 3, and the socket 34 facilitates the installation of a lifting component. The lifting component is configured as a lifting adjuster 7, and the lifting adjuster 7 facilitates the height adjustment of the supporting steel truss 5. The lifting adjuster 7 includes a plug-in rod 71 and an adjusting screw 72, and the plug-in rod is used to be inserted into the inner side of the supporting steel truss 5. The adjusting screw 72 facilitates the adjustment of the height of the plug-in rod 71. A heating and softening gasket 41 is provided on the plug-in rod 71, and the heating and softening gasket 41 is used to heat and soften by means of resistance wire heating, electromagnetic induction heating, etc., and a hexagonal joint 711 is provided on the bottom side of the plug-in rod 71, and the hexagonal joint 711 facilitates the rotation of the adjusting screw 72. The bottom end of the plug rod 71 is provided with a threaded groove 712, which is connected to the adjusting screw 72, so that the height of the plug rod 71 can be adjusted by rotating the adjusting screw 72. The bottom of the adjusting screw 72 is provided with a bottom rod 721, and the bottom end of the bottom rod 721 is provided with a plug connector 722, which is plugged into the inner side of the socket 34. This structure facilitates the connection of the adjusting screw 72 to the supporting steel truss 5.

[0070] like Figure 7 As shown, the heating and softening gasket 41 is a hydrocarbon or vinyl thermoplastic containing polar genes. The heating and softening gasket 41 contains a metal sheet, and the metal sheet is connected to an external power cord to achieve heating and softening. All the heating and softening gaskets 41 can be connected in series as a whole to quickly soften the gaskets at different positions of the floor.

[0071] like Figure 2 and Figure 3 As shown, multiple triangular support plates 51 are evenly spaced along the inner side of the supporting steel truss 5. These support plates 51 are used to support the interior of the supporting steel truss 5, ensuring sufficient strength. Furthermore, both ends of the supporting steel truss 5 are sleeved onto the top of the lifting adjuster 7, and the bottom of the supporting steel truss 5 is attached to the upper surface of the heated and softened gasket 41. This structure ensures sufficient stability of the supporting steel truss 5.

[0072] Example 3

[0073] like Figure 8 As shown, a construction method for a prefabricated structural floor without ground support is provided. The specific steps of the construction method are as follows:

[0074] S100. Calculate the minimum bending strength required for the supporting steel truss 5. Then, based on the minimum bending strength, process the supporting steel truss 5 with a bending strength greater than the minimum bending strength to ensure that the bending strength of the supporting steel truss 5 meets the usage requirements. The method for calculating the minimum bending strength of the supporting steel truss 5 is as follows: the cross-section of the supporting steel truss 5 is a rectangular structure. Assume that the width of the supporting steel truss 5 is b, the height is h, and the length is determined according to the span of the floor slab. The bending strength calculation formula of the load-bearing beam is: ; Where M is the bending moment and W is the bending coefficient; the calculation formula of the bending coefficient W is: , where b is the width of the supporting steel truss 5 and h is the height of the supporting steel truss 5.

[0075] S200. During the prefabrication of the assembled structural component 1 in the factory, the embedded bolt sleeve 21 is positioned and laid out in advance to ensure the accuracy of the embedded position; then the assembled structural component 1 is prefabricated; at the same time, a batch of prefabricated panels 6 to be used are prefabricated in the factory.

[0076] S300 , transporting the processed assembled structural components 1 , supporting steel trusses 5 and prefabricated panels 6 to the location designated by the construction workers, and performing protective treatment on the assembled structural components 1 and supporting steel trusses 5 .

[0077] S400, a plurality of through holes 33 are set on one end of the support member 3 that is in contact with the prefabricated structural component 1, and the through holes 33 are aligned with the embedded bolt sleeves 21, and then a plurality of fixing bolts 2 are sequentially passed through the through holes 33 of the support member 3 and screwed into the embedded sleeves to achieve the purpose of fixing the support member 3; in the process of fixing the support member 3 by the fixing bolts 2, the support member 3 needs to be fixed at a specified height on the surface of the prefabricated structural component 1. After the support member 3 is fixed, check whether the support member 3 is shaking and whether the fixing bolts 2 are tightened.

[0078] S500 , vertically upwardly connect the lifting assembly to the support frame with threads, slowly rotate the lifting assembly, adjust the lifting assembly to a predetermined height, and then place the heated and softened gasket 41 .

[0079] S600. Lift the supporting steel truss 5 using a lifting device and align the ends of the supporting steel truss 5 with the lifting assembly, ensuring that both ends of the supporting steel truss 5 are installed on the lifting assembly. After the supporting steel truss 5 is installed, check its overall levelness with a spirit level. If it is skewed, adjust the lifting assembly to ensure that the overall levelness of the steel truss meets the required levelness. When the ends of the supporting steel truss 5 are placed on the lifting assembly, ensure that the top of the lifting assembly is lower than the top of the supporting steel truss 5 to ensure that the heated and softened gasket 41 is heated and softened and that the supporting steel truss 5 moves downward.

[0080] S700: Use a lifting device to lift and install the precast panels 6 on the upper surfaces of the prefabricated structural member 1 and the supporting steel trusses 5. Then, the steel mesh can be tied to the precast panels 6 and concrete can be poured. After the precast panels 6 are hoisted, the height of the precast panels 6 is adjusted using a lifting assembly so that the upper surfaces of the precast panels 6 are aligned.

[0081] S800: After the concrete is poured and solidified, the heat-softening gasket 41 is first heated to soften it, thereby lowering the supporting steel truss 5. The lifting assembly is then disassembled. After the lifting assembly is disassembled, the supporting steel truss 5 can be disassembled. Finally, the support member 3 is disassembled and the disassembled components are stored separately for later use. Before storage, the disassembled components must be treated with rust prevention to prevent excessive rust from long-term storage, which may affect the overall strength of the components.

[0082] In summary, compared with the prior art, the present invention pre-embeds multiple bolt sleeves 21 on the prefabricated structural member 1. After the prefabricated structural member 1 is installed, the support members 3 are installed at the pre-embedded bolt sleeves 21 on the wall. The support members 3 are arranged in a row on the prefabricated structural member 1. A lifting assembly is installed on the support members 3. The top of the lifting assembly is connected to a supporting steel truss 5, and the two ends of the supporting steel truss 5 are respectively mounted on the support members 3 on the two prefabricated structural members 1 that are aligned with each other. The height of the supporting steel truss 5 can be adjusted by the lifting assembly, thereby achieving the purpose of adjusting the prefabricated plate 6 above the supporting steel truss 5. At the same time, the support members 3, the lifting assembly, and the supporting steel truss 5 can all be disassembled and reused, thereby achieving the purpose of saving construction costs.

[0083] The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A ground-free support device for assembled structural floors, characterized in that: include: Supporting steel trusses (5); Support members (3) symmetrically arranged at both ends of the supporting steel truss (5), the support members (3) being connected to the bottom of the supporting steel truss (5) via fixing bolts (2); A lifting assembly is provided between the supporting steel truss (5) and the supporting member (3); a heating and softening gasket (41) is provided on the upper edge of the lifting assembly at the bottom of the supporting steel truss (5); the supporting steel truss (5) and the prefabricated plate (6) are separated by heating and softening the heating and softening gasket (41), thereby realizing the disassembly and reuse of the supporting member (3), the lifting assembly and the supporting steel truss (5); the heating and softening gasket (41) is made of hydrocarbon or polar gene-containing vinyl thermoplastics, and the heating and softening gasket (41) contains an electric heating metal sheet or an electric heating metal wire.

2. The ground-free support equipment for prefabricated structural floor according to claim 1, characterized in that: The lifting component is configured as a lifting regulator (7), and the lifting regulator (7) comprises a plug-in rod (71); The heating and softening gasket (41) is arranged on the plug-in rod (71), and a hexagonal joint (711) is provided on the bottom side of the plug-in rod (71).

3. The ground-free support equipment for assembled structural floor according to claim 2, characterized in that: The lifting and lowering adjuster (7) comprises an adjusting screw (72); A thread groove (712) is provided at the bottom end of the plug-in rod (71), and the thread groove (712) is connected to the adjusting screw rod (72).

4. The ground-free support equipment for assembled structural floor according to claim 3, characterized in that: A bottom rod (721) is provided at the bottom of the adjusting screw rod (72), and a plug connector (722) is provided at the bottom end of the bottom rod (721).

5. A ground-free support device for assembled structural floor according to any one of claims 1 to 4, characterized in that: The support member (3) is L-shaped, and a nut (31) is provided on its upper surface. A threaded hole penetrating the support member (3) is provided in the middle of the nut (31).

6. The ground-free support equipment for prefabricated structural floor according to claim 5, characterized in that: The two ends of the support member (3) are connected via an oblique support rod (32) to increase the strength of the support member (3).

7. The ground-free support equipment for prefabricated structural floor according to claim 6, characterized in that: One end of the support member (3) that abuts against the assembled structural component (1) is provided with a plurality of through holes (33), and the through holes (33) match the bolt sleeves (21) pre-buried in the assembled structural component (1).

8. The ground-free support equipment for assembled structural floor according to claim 7, characterized in that: The top of the support member (3) is provided with an insertion hole (34).

9. A ground-free support device for a prefabricated structural floor according to any one of claims 1 to 4, characterized in that: The lifting component is configured as a lifting screw (4), the top end of the lifting screw (4) is configured as a support surface, the bottom end of the lifting screw (4) is provided with a driving joint (42), and the heating and softening gasket (41) is sleeved on the lifting screw (4).

10. A ground-free support device for a prefabricated structural floor according to any one of claims 1 to 4, characterized in that: A plurality of triangular support plates are evenly arranged on the inner side of the supporting steel truss.

11. A method for constructing a prefabricated structural floor slab without ground support, which is implemented by using the prefabricated structural floor slab without ground support equipment as claimed in any one of claims 1 to 10, characterized in that: The steps include: S100, calculating the minimum bending strength required for the supporting steel truss, and processing a supporting steel truss (5) with a bending strength greater than the minimum bending strength based on the minimum bending strength; S200, during the prefabrication process of the assembled structural component (1), the embedded bolt sleeve (21) is positioned and laid out in advance, and the assembled structural component (1) is prefabricated; at the same time, a batch of prefabricated panels (6) to be used are prefabricated in the factory; S300, transporting the processed assembled structural components (1), supporting steel trusses (5) and prefabricated panels (6) to a location designated by the construction worker, and performing protective treatment on the assembled structural components (1) and supporting steel trusses (5); S400, a plurality of through holes (33) are provided at one end of the support member (3) that is in contact with the assembled structural component (1), and the through holes (33) are aligned with the embedded bolt sleeves (21), and then a plurality of fixing bolts (2) are sequentially passed through the through holes (33) of the support member (3) and screwed into the embedded sleeves, thereby achieving the purpose of fixing the support member (3); S500, connect the lifting assembly vertically upward to the support frame, slowly rotate the lifting assembly, adjust the lifting assembly to a predetermined height, and then place the heated and softened gasket (41); S600, lifting the supporting steel truss (5) by means of a lifting device, and aligning the two ends of the supporting steel truss (5) with the lifting assembly, so that the two ends of the supporting steel truss (5) are mounted on the lifting assembly; S700, using a lifting device to lift the prefabricated panel (6) and install it on the upper surface of the assembled structural member (1) and the supporting steel truss (5), then tying a steel mesh on the prefabricated panel (6), and pouring concrete; S800, after the concrete is poured and solidified, the heat-softening gasket (41) is first heated to soften the heat-softening gasket (41), thereby allowing the supporting steel truss (5) to move downward, and then the lifting assembly is disassembled. After the lifting assembly is disassembled, the supporting steel truss (5) is disassembled, and finally the supporting member (3) is disassembled, and the disassembled components are classified and stored.

12. A method for constructing a prefabricated structural floor slab without ground support according to claim 11, characterized in that: The method of calculating the minimum bending strength of the supporting steel truss (5) in step S100 is as follows: The cross section of the supporting steel truss (5) is a rectangular structure. The width of the supporting steel truss (5) is b, the height is h, and the length is determined according to the span of the floor slab. The calculation formula for the bending strength of the load-bearing beam is: ， Where: M is the bending moment and W is the bending coefficient.

13. A method for constructing a prefabricated structural floor slab without ground support according to claim 12, characterized in that: The bending resistance coefficient W is: ， Wherein: b is the width of the supporting steel truss (5), and h is the height of the supporting steel truss (5).

14. A method for constructing a prefabricated structural floor slab without ground support according to any one of claims 11 to 13, characterized in that: In the process of fixing the support member (3) by the fixing bolts (2) in step S400, the support member (3) needs to be fixed at a specified height on the surface of the assembled structural component (1). After the support member (3) is fixed, it is checked whether the support member (3) is shaking and whether the fixing bolts (2) are tightened.

15. A method for constructing a prefabricated structural floor slab without ground support according to any one of claims 11 to 13, characterized in that: After the supporting steel truss (5) is installed in step S600, the overall levelness is checked with a level ruler. If there is any skewness, the lifting assembly is adjusted to ensure that the overall levelness of the steel truss meets the requirements.

16. A method for constructing a prefabricated structural floor slab without ground support according to claim 15, characterized in that: In step S600, when both ends of the supporting steel truss (5) are sleeved on the lifting assembly, it is ensured that the top of the lifting assembly is lower than the top of the supporting steel truss (5), so as to ensure that the supporting steel truss (5) moves downward after the heated and softened gasket (41) is heated and softened.

17. A method for constructing a prefabricated structural floor slab without ground support according to any one of claims 11 to 13, characterized in that: After the prefabricated panels (6) are hoisted in step S700, the height of the prefabricated panels (6) is adjusted using a lifting assembly so that the upper surfaces of the plurality of prefabricated panels (6) are on the same plane.

18. A method for constructing a prefabricated structural floor slab without ground support according to any one of claims 11 to 13, characterized in that: In the step S800, each component after disassembly must be subjected to rust prevention treatment before storage to avoid a large amount of rust after long-term storage.

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