Self-supporting floor formwork system and method for manufacturing cast-in-place reinforced concrete floor by using same

Abstract

The invention discloses a self-supporting floor formwork system and a method for manufacturing a cast-in-place reinforced concrete floor by using the system, the system is used for the cast-in-place reinforced concrete floor, and the self-supporting floor formwork system comprises a plurality of steel structure beams arranged on a steel structure frame and used for supporting the bottom of the cast-in-place reinforced concrete floor; the floor slab bottom die is arranged between two adjacent steel structure beams on the same layer and is used for forming a floor slab; the position adjusting mechanism is arranged at the bottom of the floor slab bottom die and used for adjusting the height of the floor slab bottom die, the position adjusting mechanism comprises a supporting steel beam and a pair of end supporting structures detachably connected to the ends of the supporting steel beam, and the end supporting structures are placed between an upper flange plate and a lower flange plate of the steel structure beam; the vertical height of the supporting steel beam is adjusted. The construction method has the beneficial effects that the rigidity is large, the deflection is small, cracks of the floor slab during construction are greatly avoided, the floor slab bottom die is detachable, and subsequent leakage maintenance is facilitated; less construction materials are used, mounting and dismounting are flexible and convenient, and damage to the steel beam structure is small.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to a self-supporting floor slab formwork system and a method for manufacturing a cast-in-place reinforced concrete floor slab by using the system. Background Art

[0002] At present, steel frame structures generally use steel truss floor decking as the floor formwork method. Steel truss floor decking has the advantages of easy installation and no need to remove the formwork. No formwork frame needs to be set up during construction, so it is very suitable for steel structure buildings with very high floor heights. On the other hand, due to some special designs, such as steel structure truss swimming pools, the steel trusses are prone to repeated disturbance changes during the filling and drainage of the swimming pool, causing the concrete volume to shrink, surface cracks to form, and tiny gaps to form inside the concrete. At the same time, due to the presence of the oblique ribs of the steel truss, these tiny gaps are easily connected and become the seepage channel of the swimming pool water. The leaking water flows downward along the seepage channel and flows out to the edge of the plate through the groove of the corrugated steel plate. It is difficult to accurately find the leakage point during maintenance. Therefore, in order to facilitate the rapid and accurate finding of the leakage point for maintenance when the steel truss swimming pool floor leaks, it is necessary to use a floor formwork method with a removable bottom formwork for construction.

[0003] The existing alternative formwork support methods generally involve building truss supports made of materials such as steel bars, angle steel, and square tubes between the steel structure beams on both sides, or using floor decks with detachable bottom formwork to replace traditional steel truss floor decks. However, when using steel bars or square tube trusses for support, due to insufficient cross-sectional stiffness, certain disturbance deformation will still occur during the construction process. When facing ultra-thick and ultra-heavy floor slabs, it is easier to cause cracks in the floor slabs. In addition, since the connection nodes with the steel structure beams are generally welded, the welding residual stress has certain damage to the steel structure beams, affecting their structural bearing capacity. Although the detachable floor deck is temporarily fixed to the steel truss compared to the traditional steel truss floor deck, it is convenient for subsequent removal. However, since the steel truss is still in use, after the formwork is removed, the leakage water flows along the cracks and the oblique ribs of the steel truss to the temporary fixing point and directly appears on the bottom surface of the floor slab, which will form more leakage points.

[0004] Therefore, there is an urgent need for a floor slab formwork system that is easy to disassemble and assemble, reduces the difficulty of pouring, and is not prone to cracks. Summary of the invention

[0005] In view of the shortcomings of the prior art mentioned above, the purpose of the present invention is to provide a self-supporting floor slab formwork system and a method for manufacturing cast-in-place reinforced concrete floor slabs using the system, so as to solve the current problems of difficult formwork support for cast-in-place floor slabs, easy cracking and difficult repair of water leakage areas.

[0006] To solve the above problems, the technical solution adopted by the present invention is: The self-supporting floor slab formwork system of the present invention is used for cast-in-place reinforced concrete floor slabs, and is characterized by comprising: A plurality of steel structural beams arranged on the steel structural frame for supporting the bottom of the cast-in-place reinforced concrete floor slab; A floor bottom formwork disposed between two adjacent steel structure beams on the same floor for forming the floor; and A position adjustment mechanism is arranged at the bottom of the floor bottom formwork for adjusting the height of the floor bottom formwork. The position adjustment mechanism includes a supporting steel beam and a pair of end support structures detachably connected to the ends of the supporting steel beam. The end support structure is placed between the upper flange plate and the lower flange plate of the steel structure beam and is used to adjust the vertical height of the supporting steel beam.

[0007] As a preferred embodiment of the present invention, the supporting steel beam is an I-beam whose length is less than the clear distance between two adjacent steel structure beams.

[0008] As a preferred embodiment of the present invention, the end support structure includes a connecting corbel detachably connected to the end of the supporting steel beam and an upper telescopic tensioning part and a lower telescopic tensioning part detachably arranged on the connecting corbel for adjusting the vertical height of the connecting corbel, the upper telescopic tensioning part supports and tensions between the connecting corbel and the upper flange plate of the steel structure beam, the lower telescopic tensioning part supports and tensions between the connecting corbel and the lower flange plate of the steel structure beam, and the position of the connecting corbel between the upper flange plate and the lower flange plate of the steel structure beam is adjusted by adjusting the telescopic length of the upper telescopic tensioning part and the lower telescopic tensioning part.

[0009] As a preferred embodiment of the present invention, the connecting corbel is an I-beam whose cross section is consistent with that of the supporting steel beam, and is detachably connected to the end of the supporting steel beam through a connecting plate assembly.

[0010] As a preferred embodiment of the present invention, the upper telescopic tensioning part includes an upper adjusting screw, an upper limit adjusting seat threadedly connected to the upper limit adjusting seat, and a reverse support top support plugged into and matched with the upper part of the upper adjusting screw, and the lower end of the upper adjusting screw is fixedly installed with a first card slot for snap-fitting with the connecting corbel; the reverse support top support is sleeved on the part of the upper adjusting screw located above the upper limit adjusting seat, and the lower end of the reverse support top support is in contact with the upper limit adjusting seat, and the upper end of the reverse support top support is in contact with the upper flange plate of the steel structure beam.

[0011] As a preferred embodiment of the present invention, the upper adjusting screw has an external thread, the upper limit adjusting seat has an internal thread, and the upper adjusting screw is connected to the upper limit adjusting seat sleeved on the outside of the upper adjusting screw through threaded rotation engagement.

[0012] As a preferred embodiment of the present invention, the first slot is a U-shaped slot with its opening facing downward.

[0013] As a preferred embodiment of the present invention, a gripping portion is provided on the outer periphery of the upper limit adjustment seat.

[0014] As a preferred embodiment of the present invention, the lower telescopic tensioning part includes a lower adjusting screw, a lower limit adjusting seat threadedly connected to the lower limit adjusting seat, and a telescopic support base plugged into and matched with the lower part of the lower adjusting screw, and the upper end of the lower adjusting screw is fixedly installed with a second card slot for engaging with the connecting corbel; the telescopic support base is sleeved on the part of the lower adjusting screw located below the lower limit adjusting seat, and the upper end of the telescopic support base is in contact with the lower limit adjusting seat, and the lower end of the telescopic support base is in contact with the lower flange plate of the steel structure beam.

[0015] As a preferred embodiment of the present invention, the second slot is a U-shaped slot with its opening facing downward.

[0016] As a preferred embodiment of the present invention, a gripping portion is provided on the outer periphery of the lower limit adjustment seat.

[0017] As a preferred embodiment of the present invention, the telescopic support base includes an adjusting screw and a supporting sleeve that are plugged into each other, the bottom end of the adjusting screw is provided with a base, the outer sleeve of the adjusting screw is provided with an adjusting limit block, the adjusting screw and the adjusting limit block are connected by threaded rotation engagement, and the upper end of the supporting sleeve is in contact with the adjusting limit block, and the lower end of the supporting sleeve is in contact with the adjusting limit block.

[0018] As a preferred embodiment of the present invention, the base is a sheet-like structure or a block-like structure perpendicular to the adjusting screw, so that the lower telescopic tensioning part can be stably placed on the lower flange plate of the steel structure beam.

[0019] As a preferred embodiment of the present invention, a force applying portion is provided on the outer periphery of the adjustment limit block.

[0020] As a preferred embodiment of the present invention, the floor bottom formwork includes a wooden formwork having an upper surface and a lower surface that are separated from each other, and a plurality of square timbers are arranged at equal intervals on the lower surface of the wooden formwork; the lower surfaces of different square timbers on the same wooden formwork are flush.

[0021] As a preferred embodiment of the present invention, a sealing plate is detachably provided at the gap between the floor slab bottom formwork and the upper flange plate of the steel structure beam to prevent leakage of slurry from the floor slab.

[0022] As a preferred embodiment of the present invention, a hanging piece is provided on the bottom edge of the upper flange plate of the steel structure beam.

[0023] As a preferred embodiment of the present invention, the lifting member is a hook, which is used to hook the steel rope as a force point of the steel rope when lifting the supporting steel beam.

[0024] As a preferred embodiment of the present invention, the connecting corbel is detachably connected to the supporting steel beam via a connecting assembly.

[0025] As a preferred embodiment of the present invention, a plurality of first high-strength bolt holes are respectively provided on the web of the connecting corbel and the web of the supporting steel beam.

[0026] As a preferred embodiment of the present invention, the connecting assembly includes a connecting plate and high-strength bolts, and the connecting plate is provided with second high-strength bolt holes corresponding to the positions of the high-strength bolt holes; the high-strength bolts are passed through the first high-strength bolt holes and the second high-strength bolt holes that are aligned in the thickness direction of the web, so as to realize the docking and fixation of the connecting corbel and the supporting steel beam.

[0027] The method for manufacturing a cast-in-place reinforced concrete floor slab by using the self-supporting floor slab formwork system of the present invention is characterized in that the method comprises the following steps: Install the steel structural beams at the bottom of the steel structural frame; According to the distance between two adjacent steel structure beams, determine the wooden formwork assembly modulus, square timber spacing, and supporting steel beam spacing, and then fix the square timbers at equal intervals on the lower surface of the wooden formwork to form a combined floor bottom formwork. The surface of the square timbers is flush to ensure that each square timber fits the upper surface of the supporting steel beam during construction; The assembled end support structure is vertically placed between the upper flange plate and the lower flange plate of the steel structure beam, and the axial length of the end support structure is adjusted so that the end support structure is tensioned between the upper flange plate and the lower flange plate; Hoist the supporting steel beam between two adjacent steel structure beams, and connect and fix the end of the supporting steel beam to the corresponding end supporting structure; Place the floor bottom formwork on the floor bottom formwork, and adjust the vertical height of the supporting steel beam through the end support structure so that the upper surface of the wooden formwork is flush with the surface of the upper flange plate; Use sealing plates to seal the gap between the wooden formwork and the steel structure beam; Pour the floor slab concrete on the floor bottom formwork. When the concrete strength reaches the requirement, remove the formwork and complete the floor slab pouring.

[0028] When assembling the end support structure, adjust the position of the connecting corbel to facilitate the placement of the floor bottom membrane on the supporting steel beam later. The upper surface of the floor bottom membrane can be roughly flush with the upper flange plate of the steel structure beam. After subsequent installation, only fine-tuning is required, which is convenient for construction.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting up a formwork system between steel structure beams, the height of the floor bottom membrane can be quickly adjusted. The formwork system has the characteristics of high rigidity and low disturbance, which greatly avoids cracks in the floor during construction. At the same time, the floor bottom formwork is removable, which is convenient for subsequent leakage repair work. The construction method using the formwork system has the advantages of low material consumption, flexible and convenient installation and disassembly, and little damage to the steel beam structure, avoiding the safety hazards caused by the erection of ultra-high formwork frames. The floor adopts traditional double-layer bidirectional steel bars instead of steel trusses, which greatly reduces the feasibility of potential water seepage channels. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a block diagram of the construction method of the self-supporting floor slab formwork system of the present invention; Figure 2 It is a structural schematic diagram of the self-supporting floor slab formwork system of the present invention; Figure 3 It is a structural schematic diagram of the end support structure of the present invention; Figure 4 It is a schematic diagram of the positions of the upper telescopic tensioning part and the lower telescopic tensioning part of the present invention; Figure 5 This is a schematic diagram of dismantling the supporting steel beam of the present invention; Figure 6 It is a schematic diagram of removing the floor bottom membrane of the present invention.

[0031] In the accompanying description: 1-floor bottom formwork; 11-wood formwork; 12-square wood; 2- Position adjustment mechanism; 21-supporting steel beam; 211-inlet; 212-outlet; 213-blocking mechanism; 2131-sealing plate; 2132-gas spring; 22-end support structure; 221-connecting bracket; 222-upper telescopic tensioning part; 2221-upper adjusting screw; 2222-upper limit adjustment seat; 2223-reverse support top support; 2224-first card slot; 2225-top plate; 223-lower telescopic tensioning part; 2230-telescopic support base; 2231-lower adjusting screw; 2232-lower limit adjustment seat; 2233-second card slot; 2234-adjusting screw; 2235-support sleeve; 2236-adjusting limit block; 2237-base; 23-connecting plate assembly; 231-connecting plate; 232-high-strength bolt; 3-steel structure beam; 31-upper flange plate; 311-lifting piece; 32-lower flange plate; 4-Seal the board; 5-Steel rope. DETAILED DESCRIPTION

[0032] The following describes the implementation of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application.

[0033] It should be noted that the process equipment or devices not specifically specified in the following embodiments are all conventional equipment or devices in the art.

[0034] In addition, it should be understood that one or more method steps mentioned in this application do not exclude the existence of other method steps before or after the combination step or the insertion of other method steps between these explicitly mentioned steps, unless otherwise specified; it should also be understood that the combination connection relationship between one or more devices / apparatuses mentioned in this application does not exclude the existence of other devices / apparatuses before or after the combination device / apparatus or the insertion of other devices / apparatuses between these two explicitly mentioned devices / apparatuses, unless otherwise specified. Moreover, unless otherwise specified, the numbering of each method step is only a convenient tool for identifying each method step, and is not intended to limit the order of arrangement of each method step or the scope of implementation of this application. Changes or adjustments in their relative relationships shall also be regarded as the scope of implementation of this application without substantial changes in the technical content.

[0035] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0036] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "inner", "outer", "axial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0039] The present application is further described below in conjunction with specific embodiments, but the protection scope of the present application is not limited thereto.

[0040] like Figure 2~Figure 6 As shown, the self-supporting floor slab formwork system of the present invention is used for cast-in-place reinforced concrete floor slabs, comprising: A plurality of steel structure beams 3 arranged in the steel structure frame for supporting the bottom of the cast-in-place reinforced concrete floor slab; A floor bottom formwork 1 disposed between two adjacent steel structure beams 3 on the same floor for forming a floor; and A position adjustment mechanism 2 for adjusting the height of the floor bottom formwork 1 is supported at the bottom of the floor bottom formwork 1. The position adjustment mechanism 2 includes a supporting steel beam 21 and a pair of end support structures 22 detachably connected to the ends of the supporting steel beam 21. The end support structure 22 is detachably arranged between the upper flange plate 31 and the lower flange plate 32 of the steel structure beam 3, and is used to adjust the vertical height of the supporting steel beam 21.

[0041] like Figure 2~Figure 6 As shown, the upper flange plates 31 of two adjacent steel structure beams 3 on the same layer are flush with each other, and the lower flange plates 32 of two adjacent steel structure beams 3 are flush with each other.

[0042] like Figure 2~Figure 6 As shown, the support steel beam 21 is perpendicular to the steel structure beam 3 , and the length of the support steel beam 21 is slightly smaller than the clear distance between two adjacent steel structure beams 3 .

[0043] like Figure 2~Figure 6As shown, the end support structure 22 includes a connecting corbel 221 detachably connected to the end of the supporting steel beam 21, and an upper telescopic tensioning part 222 and a lower telescopic tensioning part 223 detachably arranged on the connecting corbel 221 for adjusting the vertical height of the connecting corbel 221. The upper telescopic tensioning part 222 supports and tensions between the connecting corbel 221 and the upper flange plate 31 of the steel structure beam 3, and the lower telescopic tensioning part 223 supports and tensions between the connecting corbel 221 and the lower flange plate 32 of the steel structure beam 3. The vertical height of the connecting corbel 221 is adjusted by adjusting the telescopic length of the upper telescopic tensioning part 222 and the lower telescopic tensioning part 223.

[0044] like Figure 2~Figure 6 As shown, the connecting corbel 221 is an I-beam whose cross section is consistent with the cross section of the supporting steel beam 21, and is detachably connected to the end of the supporting steel beam 21 through a connecting plate assembly 23.

[0045] like Figure 2~Figure 6 As shown, the length of the connecting corbel 221 is greater than half of the width of the upper flange plate and / or the width of the lower flange plate of the steel structure beam 3.

[0046] like Figure 2~Figure 6 As shown, the upper telescopic tensioning part 222 includes an upper adjusting screw 2221, an upper limit adjusting seat 2222 threadedly connected to the upper limit adjusting seat 2222, and a reverse support 2223 plugged into the upper adjusting screw 2221, and the lower end of the upper adjusting screw 2221 is fixedly installed with a first slot 2224 for clamping on the outside of the connecting corbel 221; the reverse support 2223 is sleeved on the part of the upper adjusting screw 2221 located above the upper limit adjusting seat 2222, and the lower end of the reverse support 2223 is in contact with the upper limit adjusting seat 2222, and the top end of the reverse support 2223 is in contact with the upper flange plate 31 of the steel structure beam 3.

[0047] like Figure 2~Figure 6 As shown, the first slot 2224 is a U-shaped slot with its opening facing downward.

[0048] like Figure 2~Figure 6 As shown, a gripping portion is provided on the outer periphery of the upper limit adjustment seat 2222 .

[0049] like Figure 2~Figure 6 As shown, a top plate 2225 is installed at the top of the reverse support 2223. The top plate 2225 is a sheet structure or a block structure perpendicular to the reverse support 2223, so that the upper telescopic tensioning part can be stably placed on the upper flange plate 31 of the steel structure beam 3.

[0050] like Figure 2~Figure 6As shown, the lower telescopic tensioning part 223 includes a lower adjusting screw 2231, a lower limit adjusting seat 2232 threadedly connected to the lower limit adjusting seat 2232, and a telescopic support base 2230 plugged into the lower adjusting screw 2231, and the upper end of the lower adjusting screw 2231 is fixedly installed with a second card slot 2233 for clamping on the outside of the corbel; the telescopic support base 2230 is sleeved on the part of the lower adjusting screw 2231 located below the lower limit adjusting seat 2232, and the upper end of the telescopic support base 2230 is in conflict with the lower limit adjusting seat 2232, and the lower end of the telescopic support base 2230 is in conflict with the lower flange plate 32 of the steel structure beam 3.

[0051] like Figure 2~Figure 6 As shown, the second slot 2233 is a U-shaped slot with its opening facing downward.

[0052] like Figure 2~Figure 6 As shown, the openings of the first clamping slot 2224 and the second clamping slot 2233 are opposite to each other, respectively clamping the upper flange and the lower flange of the connecting bracket 221 to achieve horizontal positioning of the connecting bracket 221.

[0053] like Figure 2~Figure 6 As shown, a gripping portion is provided on the periphery of the lower limit adjustment seat 2232. By rotating the lower limit adjustment seat 2232, the construction personnel can adjust the depth of the lower adjustment screw 2231 inserted into the telescopic support base 2230, and then adjust the telescopic length of the lower telescopic tensioning portion 223 to adjust the height of the connecting bracket.

[0054] like Figure 2~Figure 6 As shown, the telescopic support base 2230 includes an adjusting screw 2234 and a supporting sleeve 2235 which are plugged into each other, a base 2237 is provided at the bottom end of the adjusting screw 2234, an adjusting limit block 2236 is provided on the outer sleeve of the adjusting screw 2234, the adjusting screw 2234 is rotatably engaged with the adjusting limit block 2236, and the upper end of the supporting sleeve 2235 is in contact with the adjusting limit block 2236, and the lower end of the supporting sleeve 2235 is in contact with the adjusting limit block 2236.

[0055] like Figure 2~Figure 6 As shown, the floor bottom formwork 1 includes a wooden formwork 11, and the wooden formwork 11 has an upper surface and a lower surface that are opposite to each other. A plurality of square timbers 12 are arranged at equal intervals on the lower surface of the wooden formwork 11; the lower surfaces of different square timbers 12 on the same wooden formwork 11 are flush. The wooden formwork 11 is a support formwork for the bottom of the concrete slab on the steel structure beam. The square timbers 12 are used to support the wooden formwork 11 and evenly distribute the weight of the wooden formwork 11 and the concrete slab to the supporting steel beam 21. The laying direction is parallel to the steel structure beam. The floor bottom formwork 1 can be assembled on the ground in advance. The length and width of the floor bottom formwork 1 are slightly smaller than the clear span length between two adjacent steel structure beams.

[0056] like Figure 2~Figure 6 As shown, the base 2237 is a sheet-like structure or a block-like structure perpendicular to the adjusting screw, so that the lower telescopic tensioning part can be stably placed on the lower flange plate 32 of the steel structure beam 3.

[0057] like Figure 2~Figure 6 As shown, a force-applying portion is provided on the outer periphery of the adjustment limit block 2236 .

[0058] like Figure 2~Figure 6 As shown, a sealing plate is detachably provided at the gap between the floor bottom formwork 1 and the upper flange plate 31 of the steel structure beam 3 .

[0059] like Figure 2~Figure 6 As shown, a sealing plate 4 is detachably provided at the gap between the floor bottom formwork 1 and the upper flange plate 31 of the steel structure beam 3 to prevent leakage of the floor slab.

[0060] like Figure 2~Figure 6 As shown, a hanging piece 311 is provided at the bottom edge of the upper flange plate 31 of the steel structure beam 3 .

[0061] like Figure 2~Figure 6 As shown, the hoisting member 311 is a hook, which is used to hook the steel rope 5 as a force point when lifting the supporting steel beam.

[0062] like Figure 2~Figure 6 As shown, the connecting corbel 221 is detachably connected to the supporting steel beam 21 via a connecting assembly 224 .

[0063] like Figure 2~Figure 6 As shown, a plurality of first high-strength bolt holes are provided on one side of the web of the connecting corbel 221 close to the supporting steel beam 21 and on the end of the web of the supporting steel beam 21 .

[0064] like Figure 2~Figure 6 As shown, the connecting assembly 23 includes a connecting plate 231 and a high-strength bolt 232, and the connecting plate 231 is provided with a second high-strength bolt hole 233 corresponding to the position of the first high-strength bolt hole; the high-strength bolt 232 is installed in the first high-strength bolt hole and the second high-strength bolt hole aligned in the thickness direction of the web, and is used to achieve the docking and fixation of the connecting corbel 221 and the supporting steel beam 21.

[0065] like Figure 2~Figure 6 As shown, the present invention also provides a method for manufacturing a cast-in-place reinforced concrete floor slab using the self-supporting floor slab formwork system, comprising the following steps: S1 installs the steel structure beam 3 at the bottom of the steel structure frame; S2 determines the assembly modulus of the wooden formwork 11, the spacing of the square timbers 12, and the spacing of the supporting steel beams 21 according to the spacing between two adjacent steel structure beams 3, and then fixes the square timbers 12 at equal spacing on the lower surface of the wooden formwork 11 to form the floor bottom formwork 1. The surface of the square timbers 12 is flush to ensure that each square timber 12 fits the upper surface of the supporting steel beam 21 during installation; S3: placing the assembled end support structure 22 between the upper flange plate 31 and the lower flange plate 32 of the steel structure beam 3, and adjusting the axial length of the end support structure 22 so that the end support structure 22 is tensioned between the upper flange plate 31 and the lower flange plate 32; S4: hoist the support steel beam 21 between the two sets of end support structures 22, and connect and fix the end of the support steel beam 21 to the end support structure 22 through the connecting plate assembly 23; S5: hoist the floor bottom formwork 1 on the floor bottom formwork 1, and adjust the telescopic length of the end support structure 22 by rotating the upper limit adjustment seat 2222, the lower limit adjustment seat 2232 and / or the adjustment limit block 2236 on the end support structure 22, until the upper surface of the wooden template 11 is horizontally aligned with the surface of the upper flange plate 31; S6 uses the sealing plate 4 to seal the gap between the wooden formwork 11 and the steel structure beam 3; S7 pours floor slab concrete on the floor slab bottom formwork 1, and after the concrete strength reaches the requirement, removes the formwork to complete the floor slab pouring.

[0066] The method for installing the end support structure 22 in step S3 includes: S31 assembles an upper telescopic tensioning part and a lower telescopic tensioning part; S32: Install the assembled lower telescopic tensioning part on the lower flange plate of the steel structure beam 3, and insert the lower flange of the connecting corbel into the second slot 2233; S33: inserting the upper flange of the connecting corbel into the first slot at the bottom of the upper telescopic tensioning part; S34 adjusts the axial lengths of the upper telescopic tensioning part and the lower telescopic tensioning part so that the connecting corbel is firmly confined between the upper flange plate 31 and the lower flange plate 32 of the steel structure beam 3. At this time, the end support structure 22 is tensioned between the upper flange plate 31 and the lower flange plate 32, completing the installation of the end support structure 22.

[0067] When removing the formwork in step S7, it is necessary to first pass the steel rope through the lifting parts, tie one end of the steel rope to the two ends of the supporting steel beam, and connect the other end of the steel rope to the lifting equipment after being tightened by the lifting parts. After the lifting is ready, remove the connecting plate, and then slowly loosen the steel rope to lift the supporting steel beam to the ground, and finally pry open the wooden formwork 11, and use the same method to lift the floor bottom membrane 1, the end support structure 22 on both sides and other components to the ground.

[0068] The present application uses a self-supporting floor slab formwork system to produce a cast-in-place reinforced concrete floor slab, which can be constructed in the following manner: Installation of floor base membrane → installation of end support structure → installation of supporting steel beams → installation of floor base formwork → pouring of floor slab → removal of formwork.

[0069] The specific construction steps are as follows: Installation of floor bottom membrane: According to the spacing between the steel structure beams, the assembly module of the wooden formwork is determined, and the spacing between the square timbers and the supporting steel beams is determined by calculation. The square timbers are nailed to the wooden formwork at equal spacings in advance to form a combined floor bottom formwork. The surface of the square timbers should be kept flush to ensure that each square timber can fit into the upper surface of the supporting steel beam during installation.

[0070] End support structure installation The installation of the end support structure includes: installation of the lower telescopic tensioning part → installation of the upper telescopic tensioning part; Installation of lower telescopic tensioning part: The lower adjusting screw 2231, the lower limit adjusting seat 2232 and the telescopic support base 2230 are assembled together in order from top to bottom. First, the lower limit adjusting seat 2232 is rotated to a suitable height to divide the lower adjusting screw 2231 into two sections, wherein the length of the upper section must be greater than the length of the lower section. Then, the supporting sleeve 2235 of the telescopic support base 2230 is sleeved on the lower section of the lower adjusting screw 2231. The assembled lower telescopic tensioning part is hoisted between the upper flange plate 31 and the lower flange plate 32 of the steel structure beam 3, and is placed on the lower flange 32 of the steel structure beam 3 according to the predetermined position and spacing. The direction of the second slot on the lower adjusting screw 2231 is adjusted so that its direction is perpendicular to the steel structure beam 3. Installation of upper telescopic tensioning part: Insert the connecting corbel into the second slot, with one end of the connecting corbel against the web of the steel structure beam 3, and push the assembled upper telescopic tensioning part between the connecting corbel and the upper flange of the steel structure beam along the direction of the upper flange of the connecting corbel. The upper telescopic tensioning part and the lower telescopic tensioning part should be on the same center line, and rotate the upper limit adjustment seat 2222 on the upper telescopic tensioning part so that the upper telescopic tensioning part presses against the upper flange of the connecting corbel and the upper flange of the steel structure beam 3 respectively, and the connecting corbel is firmly fixed by the upper telescopic tensioning part and the lower telescopic tensioning part so that it cannot rotate.

[0071] Support steel beam installation: Support steel beam installation is divided into two steps: support steel beam hoisting and support steel beam connection.

[0072] Specifically, the supporting steel beam is hoisted from above to between the end supporting structures on both sides by means of lifting equipment, and after aligning the connecting brackets on both sides, a connecting plate is placed at the joint between the web of the connecting bracket and the web of the supporting steel beam. A small number of high-strength bolts are first passed through the supporting steel beam, the connecting bracket and the connecting plate. After the supporting steel beam is initially fixed, the lifting equipment on the supporting steel beam is removed, and finally all the remaining high-strength bolts are installed, and it is checked that the tightening degree of each high-strength bolt meets the requirements; Installation of floor bottom formwork: Lift the floor bottom formwork 1 as a whole onto the supporting steel beam 21, with the side with the square wood 12 facing downward, and check whether the surface of the wooden formwork 11 is flush with the surface of the upper flange plate 31 of the steel structure beam 3. If not, adjust the height of the connecting corbel by rotating the upper limit adjustment seat 2222, the lower limit adjustment seat 2232 and / or the adjustment limit block 2236 on the end supporting structure 22, and then raise or lower the height of one end of the supporting steel beam 21 to make the wooden formwork 11 reach a horizontal state. The heights of both ends can also be adjusted at the same time to change the overall height of the floor bottom formwork 1.

[0073] If the height of a certain part of the floor bottom formwork 1 is to be lowered, when adjusting the end supporting structure 22, the height of the lower telescopic tensioning part 223 should be lowered first, and then the height of the corresponding upper telescopic tensioning part 222 should be lowered, that is, the lower limit adjusting seat 2232 should be rotated first to make the lower adjusting screw 2231 rotate into the supporting sleeve 2235, thereby lowering the height of the second slot 2233, and after the connecting corbel and the upper telescopic tensioning part 222 above it are lowered to the specified height, and at the same time, it is determined that the upper surface height of the wooden template 11 meets the requirement, the upper limit adjusting seat 2222 on the upper telescopic tensioning part 222 is rotated to extend the upper adjusting screw 2221 to the top and then push it against the upper flange plate 31 of the steel structure beam 3; conversely, when the floor bottom formwork 1 is to be raised, the upper limit adjusting seat 2222 on the upper telescopic tensioning part 222 is first rotated to contract the upper adjusting screw 2221, and then the lower limit adjusting seat 2232 is rotated to extend the lower adjusting screw 2231.

[0074] Floor slab pouring: Check the gap between the wooden formwork 11 and the steel structure beam 3, and use a sealing plate to seal the gap. One side of the sealing plate is nailed to the wooden formwork 11 to prevent it from shifting. Apply a layer of isolation agent on the surface of the wooden formwork 11 to facilitate the subsequent demolding of the floor bottom formwork 1, then tie the floor reinforcement to the steel structure beam 3 and the wooden formwork 11, and pour the floor concrete.

[0075] Demolding: When removing the formwork, the demolding personnel use a boom truck to reach the working height, tie a steel rope 5 at each end of the supporting steel beam 21, then hang the steel rope 5 on the lifting device, put the other end vertically on the ground and tighten it, unscrew the high-strength bolts one by one, remove the connecting plate, slowly loosen the steel rope 5 to make the supporting steel beam 21 slowly descend to the ground, untie the steel rope 5 and pull it to the bottom of the floor again; turn the lower limit adjustment seat 2232, slightly adjust the connecting bracket, and then turn the connecting bracket to make it parallel to the steel structure beam 3 to avoid the combined bottom form 1 from hitting the steel bracket 3 when it is removed and lowered, which will affect its removal. Fix the steel rope 5 to the bottom of the floor bottom form 1, use a crowbar to pry open the wooden formwork 11 together with the square wood 12 along the gap at the bottom of the sealing plate, so that the floor bottom form 1 is completely separated from the floor, and then slowly loosen the steel rope 5 to send the floor bottom form 1 to the ground; finally, take away the remaining components in turn and transport them to the ground for classification and placement.

[0076] Note: The hoisting parts should be welded to the bottom outer edge of the upper flange plate of the steel structure beam 3 before installing the supporting steel beam 21, and the position should be selected on both sides of the end supporting structure 22; each of the four corners of the floor bottom formwork 1 should be tied with at least one steel rope 5, and the entire floor bottom formwork 1 should be tied with at least four steel ropes 5.

[0077] The above examples are for the purpose of illustrating the embodiments disclosed by the present invention and are not to be construed as limitations of the present invention. In addition, the various modifications listed herein and the variations of methods and compositions in the invention are obvious to those skilled in the art without departing from the scope and spirit of the present invention. Although the present invention has been specifically described in conjunction with various specific preferred embodiments of the present invention, it should be understood that the present invention should not be limited to these specific embodiments. In fact, various modifications obvious to those skilled in the art as described above to obtain the invention should be included within the scope of the present invention.

Claims

1. Self-supporting floor formwork system, used for cast-in-place reinforced concrete floor, characterized by: include: A plurality of steel structure beams (3) arranged on the steel structure frame for supporting the bottom of the cast-in-place reinforced concrete floor slab; A floor slab bottom formwork (1) disposed between two adjacent steel structure beams (3) on the same floor for forming the floor slab; and A position adjustment mechanism (2) is arranged at the bottom of the floor slab bottom formwork (1) for adjusting the height of the floor slab bottom formwork, the position adjustment mechanism (2) comprising a supporting steel beam (21) and a pair of end support structures (22) detachably connected to the ends of the supporting steel beam (21), the end support structures (22) being detachably arranged between an upper flange plate (31) and a lower flange plate (32) of a steel structure beam (3) for adjusting the vertical height of the supporting steel beam (21).

2. The self-supporting floor formwork system according to claim 1, characterized in that: The supporting steel beam (21) is an I-beam having a length less than the clear distance between two adjacent steel structure beams (3).

3. The self-supporting floor formwork system according to claim 1, characterized in that: The end support structure (22) comprises a connecting bracket (221) detachably connected to the end of the supporting steel beam (21), and an upper telescopic tensioning portion (222) and a lower telescopic tensioning portion (223) detachably arranged on the connecting bracket (221) for adjusting the vertical height of the connecting bracket (221); the upper telescopic tensioning portion (222) supports and tensions between the connecting bracket (221) and the upper flange plate (31) of the steel structure beam (3); the lower telescopic tensioning portion (223) supports and tensions between the connecting bracket (221) and the lower flange plate (32) of the steel structure beam (3); and the position of the connecting bracket (221) between the upper flange plate (31) and the lower flange plate (32) of the steel structure beam (3) is adjusted by adjusting the telescopic lengths of the upper telescopic tensioning portion (222) and the lower telescopic tensioning portion (223).

4. The self-supporting floor formwork system according to claim 3, characterized in that: The connecting bracket (221) is an I-beam having a cross section consistent with that of the supporting steel beam (21), and is detachably connected to the end of the supporting steel beam (21) via a connecting plate assembly (23).

5. The self-supporting floor formwork system according to claim 3, characterized in that: The upper telescopic tensioning portion (222) comprises an upper adjusting screw (2221), an upper limit adjusting seat (2222) threadedly connected to the upper limit adjusting seat (2222), and a reverse support bracket (2223) plug-fitted with the upper portion of the upper adjusting screw (2221); a first clamping groove (2224) for clamping with the connecting bracket (221) is fixedly mounted at the lower end of the upper adjusting screw (2221); the reverse support bracket (2223) is sleeved on the portion of the upper adjusting screw (2221) located above the upper limit adjusting seat (2222), and the lower end of the reverse support bracket (2223) contacts the upper limit adjusting seat (2222), and the upper end of the reverse support bracket (2223) contacts the upper flange plate (31) of the steel structure beam (3).

6. The self-supporting floor formwork system according to claim 3, characterized in that: The lower telescopic tensioning portion (223) comprises a lower adjusting screw (2231), a lower limit adjusting seat (2232) threadedly connected to the lower limit adjusting seat (2232), and a telescopic support base (2230) plug-matched with the lower adjusting screw (2231); a second clamping groove (2233) for clamping and matching with the connecting bracket (221) is fixedly installed on the upper end of the lower adjusting screw (2231); the telescopic support base (2230) is sleeved on the portion of the lower adjusting screw (2231) located below the lower limit adjusting seat (2232), and the upper end of the telescopic support base (2230) contacts the lower limit adjusting seat (2232), and the lower end of the telescopic support base (2230) contacts the lower flange plate (32) of the steel structure beam (3).

7. The self-supporting floor formwork system according to claim 6, characterized in that: The telescopic support base (2230) comprises an adjusting screw (2234) and a supporting sleeve (2235) which are plugged into each other, a base (2237) is provided at the bottom end of the adjusting screw (2234), an adjusting limit block (2236) is sleeved on the outside of the adjusting screw (2234), the adjusting screw (2234) is rotatably engaged with the adjusting limit block (2236), the upper end of the supporting sleeve (2235) is in contact with and pressed against the adjusting limit block (2236), and the lower end of the supporting sleeve (2235) is in contact with and pressed against the adjusting limit block (2236).

8. The self-supporting floor formwork system according to claim 2, characterized in that: The floor slab bottom formwork (1) comprises a wooden formwork (11), wherein the wooden formwork (11) has an upper surface and a lower surface that are separated from each other, and a plurality of square timbers (12) are arranged at equal intervals on the lower surface of the wooden formwork (11); and the lower surfaces of different square timbers (12) on the same wooden formwork (11) are flush.

9. The self-supporting floor formwork system according to claim 1, characterized in that: A sealing plate is detachably provided at the gap between the floor slab bottom formwork (1) and the upper flange plate (31) of the steel structure beam (3).

10. A method for manufacturing a cast-in-place reinforced concrete floor slab using the self-supporting floor slab formwork system according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: Install the steel structure beam (3) at the bottom of the steel structure frame; According to the spacing between two adjacent steel structure beams (3), the assembly modulus of the wooden formwork (11), the spacing of the square timbers (12), and the spacing of the supporting steel beams (21) are determined, and then the square timbers (12) are fixed at equal spacing on the lower surface of the wooden formwork (11) to form a floor bottom formwork (1), and the surfaces of the square timbers (12) are flush to ensure that each square timber (12) fits the upper surface of the supporting steel beam (21) during installation; Placing the assembled end support structure (22) between the upper flange plate (31) and the lower flange plate (32) of the steel structure beam (3), and adjusting the axial length of the end support structure (22) so that the end support structure (22) is tensioned between the upper flange plate (31) and the lower flange plate (32); Hoisting a support steel beam (21) between two adjacent steel structure beams (3), and connecting and fixing the end of the support steel beam (21) to the corresponding end support structure (22); Placing the floor slab bottom formwork (1) on the floor slab bottom formwork (1), and adjusting the vertical height of the supporting steel beam (21) through the end support structure (22) so that the upper surface of the wooden formwork (11) is flush with the surface of the upper flange plate (31); Using a sealing plate to seal the gap between the wooden formwork (11) and the steel structure beam (3); The floor slab concrete is poured on the floor slab bottom formwork (1), and when the concrete strength reaches the required level, the formwork is removed to complete the floor slab pouring.

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