High and large formwork supporting structure and building method thereof

Abstract

The invention relates to the technical field of formworks, and provides a tall and large formwork supporting structure aiming at the problem that a traditional formwork supporting frame body is inconvenient to support, the tall and large formwork supporting structure comprises a plurality of limiting I-shaped beams arranged in parallel, the limiting I-shaped beams are anchored to a poured floor through anchoring parts, and a plurality of vertical rods are vertically arranged on the limiting I-shaped beams in a supporting mode. Channel steel is connected to the bottoms of the vertical rods, and the bottom ends of the vertical rods are slidably connected to the limiting I-shaped beam through the channel steel; the adjacent vertical rods located on the limiting I-shaped beams are connected through transverse cross rods, and the opposite vertical rods located on the adjacent limiting I-shaped beams are connected through longitudinal cross rods. The formwork supporting frame has the effect of reducing the construction difficulty of the formwork supporting frame body.

Description

Technical Field

[0001] The present application relates to the field of formwork support, and in particular to a tall formwork support structure and a construction method thereof. Background Art

[0002] When constructing large concrete cast-in-place components such as floor panels, before setting up the casting formwork, it is necessary to first support the formwork support frame on the ground or the cast floor panel to serve as the supporting structure of the casting formwork before the casting formwork can be set up.

[0003] In the related art, the formwork support frame is generally a full steel pipe structure, which is specifically composed of a number of vertical poles, transverse cross bars and longitudinal cross bars. When constructing the formwork support frame, the construction workers must first erect and support the vertical poles at various locations, and then install the transverse cross bars and longitudinal cross bars on the vertical poles at various locations through steel pipe locking fasteners to form the formwork support frame.

[0004] With regard to the above-mentioned related technologies, in order to maintain the overall strength and stability of the subsequent formwork support frame, when constructing the vertical poles, it is necessary to first mark the installation position of the vertical poles with an ink fountain line, and then the construction personnel move the vertical poles to the designated position one by one. The overall operation is relatively cumbersome, and in actual construction, due to factors such as manual placement errors and accidental touch during the subsequent installation of horizontal and vertical cross bars, it is easy to cause the vertical poles to topple over or deviate from the original placement position. Manual adjustment of the vertical pole position is required in time to put the vertical poles back in place, and the construction efficiency is low. Therefore, there is room for improvement. Summary of the invention

[0005] In order to reduce the construction difficulty of the formwork support frame and improve the overall construction efficiency, the present application provides a tall formwork support structure and a construction method thereof.

[0006] This application provides a tall formwork support structure and a construction method thereof, which adopts the following technical solutions: A tall formwork support structure comprises a plurality of parallel arranged limiting I-beams, wherein the limiting I-beams are anchored to a cast floor slab by anchoring pieces, a plurality of vertical poles are vertically supported on the limiting I-beams, the bottoms of the vertical poles are connected to channel steels, and the bottom ends of the vertical poles are slidably connected to the limiting I-beams by channel steels; adjacent vertical poles on the limiting I-beams are connected by transverse cross bars, and the vertical poles opposite to adjacent limiting I-beams are connected by longitudinal cross bars.

[0007] By adopting the above technical solution, when constructing the formwork support frame, after laying a number of limiting I-beams on the cast floor slab, a number of columns are slid into the corresponding limiting I-beams through the channel steels at their bottom ends and slide into place along the limiting I-beams, and then the adjacent columns on the same limiting I-beam and the relative columns on the adjacent limiting I-beams are respectively connected through transverse cross bars and longitudinal cross bars to form a formwork support frame. By utilizing the cooperation between the channel steel and the limiting I-beam, on the one hand, after the channel steel at the bottom end of the column is slid into the limiting I-beam, the column can be quickly positioned by sliding the channel steel; on the other hand, the column can be limited by cooperating with the limiting I-beam, which is beneficial to limit the subsequent installation of the cross bar on the column or the displacement of the column due to the operator's accidental touch. There is no need to reciprocate the position of the column during the construction process, which is beneficial to reduce the overall support efficiency of the formwork support frame. At the same time, the use of the limiting I-beam effectively increases the contact area between the bottom end of the column and the cast floor slab, so that the column can be more firmly supported on the cast floor slab; the limiting I-beam is fixed to the cast floor slab by the anchor to achieve the limiting fixation of the limiting I-beam, which is beneficial to reduce the displacement of the support beam due to external loads during the casting construction process.

[0008] Preferably, limiting airbags are supported on opposite sides of the inner cavity of the channel steel, the limiting airbags are connected with air pipes, and the limiting airbags on opposite sides of the inner cavity of the channel steel are respectively arranged toward opposite sides of the web of the limiting I-beam.

[0009] By adopting the above technical scheme, the column is slid into the corresponding limiting I-beam through the channel steel, and after sliding into place along the limiting I-beam, the limiting airbag is inflated through the air pipe of the limiting airbag to make the limiting airbag expand and press against the web of the limiting I-beam, and the two limiting airbags on the channel steel are used to limit the channel steel from sliding along the limiting I-beam, so that the column can be firmly supported on the channel steel; at the same time, the limiting airbag can absorb the vibration acting on the limiting I-beam and the column, which is beneficial to reduce the relative movement of the channel steel at the bottom of the column and the limiting I-beam caused by vibration.

[0010] Preferably, the transverse crossbar includes two transverse connecting rods, each end of which is a first hinged end and a second hinged end, and the first hinged ends of the two transverse connecting rods are hinged to each other; the second hinged ends of the two transverse connecting rods are hinged to two adjacent vertical rods, respectively; the axis direction of the rotating shaft of the first hinged end and the second hinged end of the transverse connecting rod is parallel to the axis direction of the vertical rod; the transverse connecting rod is also provided with a limiting member, which is used to limit the swing of the two transverse connecting rods.

[0011] By adopting the above technical solution, when supporting the vertical poles, the two horizontal connecting rods are swung until the axial directions of the two rods coincide, and then the swinging of the two horizontal connecting rods is limited by the limiting member, so that the two horizontal connecting rods can be used to limit the sliding of the vertical poles, thereby realizing the support and limitation of adjacent vertical poles; when storing the vertical poles, the two horizontal connecting rods are swung so that the adjacent vertical poles can be close to each other, which is beneficial to saving the storage space of the vertical poles and facilitating the storage and transportation of the vertical poles.

[0012] Preferably, the limiting member comprises a limiting sleeve sleeved on the transverse connecting rod.

[0013] By adopting the above technical solution, when the two transverse connecting rods are swung to the point where their axial directions coincide, the limiting sleeve is slid so that the two ends of the limiting sleeve are respectively inserted into the two transverse connecting rods, thereby limiting the swing of the two transverse connecting rods, thereby facilitating the limiting and fixing of adjacent columns through the two transverse connecting rods.

[0014] Preferably, a limiting bolt is threadedly provided on the outer circumference of the limiting sleeve, and one end of the limiting bolt extends into the inner cavity of the limiting sleeve.

[0015] By adopting the above technical solution, after the limit sleeve is slid into place, the limit bolts on the outer periphery of the limit sleeve are turned until the limit bolts are pressed against the outer periphery of the transverse connecting cross bar to limit the sliding of the limit sleeve, which is beneficial for the limit sleeve to more stably limit the swing of the two transverse connecting rods.

[0016] Preferably, the anchor comprises a U-shaped bolt and a limiting pressure plate, the U-shaped bolt is pre-embedded in the cast floor slab, and the two threaded sections of the U-shaped bolt extend out of the surface of the cast floor slab, and the limiting I-beam is embedded between the two threaded sections of the U-shaped bolt; the limiting pressure plate is sleeved on the two threaded sections of the U-shaped bolt through two through-holes, and the limiting pressure plate abuts against the top of the limiting I-beam, the threaded sections of the U-shaped bolt are threadedly connected with limiting nuts, and the limiting nut is tightly arranged against the side of the limiting pressure plate facing away from the limiting I-beam.

[0017] By adopting the above technical scheme and setting the anchors, when paving and fixing the limit I-beam, the limit I-beam is embedded between the two threaded sections of the U-shaped screw, and then the limit pressure plate is inserted into the two threaded sections of the U-shaped screw through the corresponding holes, and the limit nut is screwed into the threaded section of the U-shaped screw and tightened, so that the limit I-beam can be fixed on the cast floor slab. When the limit I-beam is subsequently removed, the limit nut is screwed out and the limit pressure plate is removed, so that the limit I-beam can be removed from the U-shaped bolt, which is convenient for the disassembly and assembly construction and turnover use of the limit I-beam.

[0018] Preferably, the U-shaped bolts are welded and fixed to the internal steel reinforcement structure of the cast floor slab.

[0019] By adopting the above technical solution, on the one hand, a stable connection between the U-shaped bolts and the cast floor slab is achieved, and the displacement of the U-shaped bolts during the casting of the floor slab is limited; on the other hand, the subsequent load applied to the U-shaped bolts by the external limiting I-beam can be promptly dispersed to the steel structure of the cast floor slab through the U-shaped bolts, which is beneficial to reduce the deformation and damage of the U-shaped bolts.

[0020] A method for constructing a tall formwork support structure comprises the following steps: S1: Installation of limited I-beams: The limited I-beams are fixed on the surface of the poured floor slab through anchors; S2: Pole installation: Slide the pole into the corresponding limit I-beam through the bottom channel steel; slide the pole along the limit I-beam to the specified position; S3: Transverse limit of vertical poles: connect and limit the adjacent vertical poles on the same limit I-beam through transverse cross bars; S4: Vertical limit of vertical poles: The vertical poles on adjacent limiting I-beams are longitudinally connected and limited by longitudinal cross bars.

[0021] By adopting the above technical solution, the channel steel at the bottom end of the vertical pole cooperates with the corresponding limiting I-beam, and the column is slid along the limiting I-beam so that the column can be quickly positioned to the specified position. At the same time, the limiting I-beam is used to assist in limiting the channel steel, thereby reducing the displacement or tipping of the column due to accidental touch during the subsequent installation of the horizontal and longitudinal cross bars.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. By sliding the bottom end of the vertical pole to the limiting I-beam through the channel steel, on the one hand, the vertical pole can be slid along the limiting I-beam to quickly move the vertical pole into place. On the other hand, the limiting support beam can be used to assist in limiting the vertical pole so that the vertical pole can be more stably supported on the cast floor slab.

[0023] 2. By supporting limiting airbags on opposite sides of the inner cavity of the channel steel, after the vertical pole is subsequently slid into place through the channel steel along the limiting support beam, air is inflated into the two limiting airbags in the inner cavity of the channel steel to make the two limiting airbags expand and respectively press against the opposite sides of the web of the limiting I-beam, so as to achieve the limiting fixation of the channel steel and limit the sliding of the channel steel, thereby achieving the fixing of the vertical pole on the limiting I-beam. At the same time, the two limiting airbags on the channel steel can absorb the vibration acting on the channel steel and the limiting I-beam during the subsequent pouring construction process, so as to limit the relative displacement of the channel steel and the limiting I-beam due to external vibration.

[0024] 3. Through the setting of the transverse cross bar, when storing and transporting the uprights, the connecting rods of the transverse cross bars between adjacent columns can be swung so that the adjacent uprights can be close to each other, which is beneficial to saving the overall storage space of the uprights. At the same time, the transverse cross bars between adjacent uprights can realize centralized storage of the uprights, reducing the difficulty of subsequent assembly due to scattered storage of the uprights; when supporting the uprights, by swinging the two transverse connecting rods of the transverse cross bars between adjacent uprights until the axial directions of the two transverse connecting rods coincide, the limiting tube is slid so that the limiting tube is sleeved on the two transverse connecting rods to limit the swinging of the transverse connecting rods, and the connection and limiting of the adjacent uprights can be realized through the transverse cross bars, which is beneficial to improving the connection integrity of the two adjacent uprights. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the template support structure used to illustrate the embodiment of the present application.

[0026] Figure 2 yes Figure 1 Enlarged schematic diagram of part A in the middle.

[0027] Figure 3 It is a schematic diagram of the structure of an embodiment of the present application for illustrating connecting adjacent vertical poles through a transverse connecting rod.

[0028] Figure 4 yes Figure 4 Enlarged schematic diagram of part B in the middle.

[0029] Figure 5 yes Figure 4 Enlarged schematic diagram of part C in the middle.

[0030] Figure 6 This application is a schematic diagram used to illustrate the state of adjacent vertical poles being folded and stored through a transverse connecting rod.

[0031] Description of reference numerals: 1. Limiting I-beam; 11. Anchor; 111. U-shaped bolt; 112. Limiting pressure plate; 113. Limiting nut; 2. Cast floor slab; 3. Vertical pole; 30. Adjustable top support; 31. Channel steel; 32. Limiting airbag; 33. Ear plate; 4. Transverse cross bar; 41. Transverse connecting rod; 411. First hinged end; 412. Second hinged end; 413. First hinged block; 414. Second hinged block; 42. Limiting sleeve; 421. Limiting bolt; 5. Longitudinal cross bar. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-6 This application is described in further detail.

[0033] The embodiments of the present application disclose a tall formwork support structure and a construction method thereof.

[0034] A tall formwork support structure, referring to Figure 1 and Figure 2 , including a plurality of position-limiting I-beams 1, both ends of which are connected to the surface of the cast floor slab 2 through anchors 11, and adjacent position-limiting I-beams 1 are arranged parallel to each other. A plurality of vertical poles 3 are vertically supported on the position-limiting I-beams 1; an adjustable top support 30 is installed at the top of the vertical poles 3. Channel steels 31 are welded to the bottom ends of the vertical poles 3, and the notches of the channel steels 31 are arranged downward, and the bottom ends of the vertical poles 3 are slidably connected to the corresponding position-limiting I-beams 1 through the channel steels 31. Adjacent vertical poles 3 located on the same position-limiting I-beam 1 are connected by a plurality of transverse cross bars 4, and opposite vertical poles 3 located on adjacent position-limiting I-beams 1 are connected by a plurality of longitudinal cross bars 5.

[0035] Reference Figure 1 and Figure 2 The anchor 11 includes a U-bolt 111 and a limiting pressure plate 112. The U-bolt 111 is embedded in the cast floor 2. The two threaded sections of the U-bolt 111 extend out of the surface of the cast floor 2. The bottom of the U-bolt 111 is welded and fixed to the internal steel structure of the cast floor 2. The limiting pressure plate 112 is provided with two through holes corresponding to the two threaded sections of the U-bolt 111. The limiting I-beam 1 is embedded between the two threaded sections of the U-bolt 111. The limiting pressure plate 112 is sleeved on the two threaded sections of the U-bolt 111 through the two through holes, and the limiting pressure plate 112 abuts against the top of the limiting I-beam 1. The tops of the two threaded sections of the U-bolt 111 are both threadedly connected to the limiting nut 113. The limiting nut 113 is tightly set against the side of the limiting pressure plate 112 away from the limiting I-beam 1.

[0036] Through the setting of the anchor 11, the limiting I-beam 1 is subsequently installed. After the limiting I-beam 1 is embedded between the two threaded sections corresponding to the U-shaped bolt 111, the limiting pressure plate 112 is inserted into the two threaded sections of the U-shaped bolt 111 through two through-holes, and is overlapped on the top of the limiting I-beam 1. Then, the limiting nut 113 is screwed into the threaded section of the U-shaped bolt 111 and tightened until it is pressed against the side of the limiting pressure plate 112 away from the limiting I-beam 1, so that the limiting I-beam 1 is firmly supported on the surface of the cast floor slab 2, which is beneficial to limit the displacement of the limiting I-beam 1 during the subsequent construction process. By welding and fixing the bottom end of the U-shaped bolt 111 to the internal steel structure of the cast slab 2, on the one hand, the displacement of the U-shaped bolt 111 during the pouring of concrete on the slab can be effectively limited; on the other hand, the load subsequently applied to the U-shaped bolt 111 through the limiting I-beam 1 can be timely dispersed and transmitted to the inner hole of the steel structure inside the cast slab 2 through the U-shaped bolt 111, which is beneficial to reduce the situation where the U-shaped bolt 111 is easily damaged and deformed due to long-term concentrated force.

[0037] Reference Figure 2 and Figure 3 , the two opposite sides of the inner cavity of the channel steel 31 are arranged toward the web of the position-limiting I-beam 1, and the two opposite sides of the inner cavity of the channel steel 31 are supported with position-limiting airbags 32, and the position-limiting airbags 32 are connected with air pipes. After the vertical pole 3 is subsequently slid into position along the position-limiting support beam through the channel steel 31, the air pipe is connected with the air source, and the air source inflates the corresponding position-limiting airbags 32 through the air pipe, so that the two position-limiting airbags 32 expand and respectively press against the opposite sides of the web of the position-limiting I-beam 1. On the one hand, it effectively limits the channel steel 31 from sliding along the position-limiting I-beam 1, so that the vertical pole 3 can be stably supported on the position-limiting I-beam 1. On the other hand, the two position-limiting airbags 32 in the inner cavity of the channel steel 31 can absorb the subsequent action on the channel steel 31 and the position-limiting I-beam 1, which is conducive to reducing the situation where the channel steel 31 and the position-limiting support beam move relative to each other due to external vibration.

[0038] Reference Figures 3 to 5 The transverse crossbar 4 includes two transverse connecting rods 41, one end of the transverse connecting rod 41 is a first hinge end 411, and the other end is a second hinge end 412. The first hinge end 411 of the transverse connecting rod 41 is connected to a first hinge block 413; the first hinge blocks 413 of the two transverse connecting rods 41 are mutually hingedly arranged through a pin. The second hinge end 412 of the transverse connecting rod 41 is connected to a second hinge block 414; the outer periphery of the vertical rod 3 is connected to the corresponding second hinge block 414 with an ear plate 33; the second hinge blocks 414 of the two transverse connecting rods 41 are hinged to the ear plates 33 corresponding to the adjacent vertical rods 3 through a pin. The axis direction of the rotation axis of the first hinge end 411 and the second hinge end 412 of the transverse connecting rod 41 is set parallel to the axis direction of the vertical rod 3.

[0039] The transverse connecting rod 41 is also provided with a limiter for limiting the swing of the two transverse connecting rods 41. The limiter includes a limiter sleeve 42. The limiter sleeve 42 is sleeved on the transverse connecting rod 41. A limiter bolt 421 is threadedly penetrated on the outer periphery of the limiter sleeve 42. One end of the limiter bolt 421 extends to the inner cavity of the limiter sleeve 42.

[0040] Reference Figure 3 and Figure 6By setting the transverse crossbar 4, the adjacent vertical poles 3 are connected by the transverse crossbar 4, which is conducive to the centralized storage of the vertical poles 3. When transporting and storing the vertical poles 3, the two transverse connecting rods 41 are swung to make the adjacent vertical poles 3 close to each other, which is conducive to reducing the overall space occupied by the vertical poles 3 and facilitating the transportation and storage of the vertical poles 3. When supporting the vertical poles 3 in the subsequent stage, the vertical poles 3 are slid along the limit support beam through the channel steel 31 until the axis directions of the two transverse connecting rods 41 on the transverse crossbar 4 of the adjacent vertical poles 3 coincide, and then the limit sleeve 42 on the transverse connecting rod 41 is slid until the two ends of the limit sleeve 42 are respectively inserted into the two transverse connecting rods 41, and then the tightening bolt on the limit sleeve 42 is screwed until the limit bolt 421 is tightened against the outer periphery of the relative transverse connecting rod 41, so as to realize the support and limit of the adjacent vertical poles 3 by the two transverse connecting rods 41, so as to limit the relative movement of the adjacent vertical poles 3, which is conducive to improving the overall stability of the template support frame.

[0041] The longitudinal cross bar 5 is fastened and fixed to the opposite vertical bars 3 on the adjacent limiting I-beam 1 by means of steel pipe lock fasteners.

[0042] A method for constructing a tall formwork support structure, referring to Figures 1 to 6 , including the following steps: S1: Paving the limited I-beam 1: The limited I-beam 1 is fixedly installed on the surface of the cast floor slab 2 through the anchor 11; the specific steps are as follows: S1.1: Place the I-beam 1 to be installed between the two threaded sections of the corresponding U-bolt 111; S1.2: Insert the limiting pressure plate 112 into the two threaded sections of the U-shaped bolt 111 through the corresponding holes and overlap the top of the limiting I-beam 1; S1.3: Screw the limiting nut 113 into the threaded end of the U-shaped bolt 111 and make it press against the side of the limiting pressure plate 112 away from the limiting I-beam 1; S2: Install the pole 3 in place: The specific steps are as follows: S2.1: Slide the vertical pole 3 into the corresponding limit I-beam 1 through the bottom channel steel 31; slide the vertical pole 3 along the limit I-beam 1 to the specified position; and make the axis directions of the two transverse connecting rods 41 of the connecting cross bars of the adjacent vertical poles 3 coincide; S2.2: Connect the air pipe of the limiting airbag 32 in the inner cavity of the channel steel 31 to the air source; S2.3: Limiting the channel steel 31: Inflate the limiting airbag 32 from the air source through the air pipe, so that the two limiting airbags 32 in the inner cavity of the channel steel 31 expand and respectively press against the opposite sides of the web of the limiting I-beam 1.

[0043] S3: Transverse limit of the vertical pole 3: Connect and limit the adjacent vertical poles 3 on the same limit I-beam 1 through the transverse crossbar 4; the specific steps are as follows: S3.1: The limiting sleeve 42 is put in place: the limiting sleeve 42 is slid until both ends of the limiting sleeve 42 are respectively sleeved on two transverse connecting rods 41 at the transverse crossbar 4; S3.2: Limiting the limiting sleeve 42: Tighten the limiting bolt 421 on the outer periphery of the limiting sleeve 42 until the limiting bolt 421 is tightly pressed against the outer periphery of the opposite transverse connecting rod 41 .

[0044] S5: longitudinal limitation of the uprights 3: the longitudinal cross bars 5 are connected to the adjacent limiting I-beams 1 via steel pipe fasteners, so as to utilize the longitudinal cross bars 5 to longitudinally connect and limit the opposite uprights 3 on the adjacent limiting I-beams 1.

[0045] In the present application, the bottom of the vertical pole 3 is slidably connected to the limiting I-beam 1 through the channel steel 31. On the one hand, it is convenient to quickly move the vertical pole 3 into place when supporting the formwork support frame, which is beneficial to reducing the overall construction difficulty of the formwork support frame. On the other hand, the limiting I-beam 1 can be auxiliary limited by cooperating with the channel steel 31 at the bottom end of the vertical pole 3, so that the vertical pole 3 can be more firmly supported on the cast floor slab 2, which is beneficial to improving the overall structural strength of the formwork support frame.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tall formwork support structure, characterized in that: The invention comprises a plurality of parallel-arranged limiting I-beams (1), wherein the limiting I-beams (1) are anchored to a cast floor slab (2) through anchoring pieces (11), a plurality of vertical poles (3) are vertically supported on the limiting I-beams (1), the bottoms of the vertical poles (3) are connected to channel steels (31), and the bottom ends of the vertical poles (3) are slidably connected to the limiting I-beams (1) through the channel steels (31); adjacent vertical poles (3) on the limiting I-beams (1) are connected to each other through transverse cross bars (4), and the vertical poles (3) opposite to each other on adjacent limiting I-beams (1) are connected to each other through longitudinal cross bars (5).

2. A tall formwork support structure according to claim 1, characterized in that: Position limiting air bags (32) are supported on opposite sides of the inner cavity of the channel steel (31), and the position limiting air bags (32) are connected to an air pipe. The position limiting air bags (32) on opposite sides of the inner cavity of the channel steel (31) are respectively arranged toward opposite sides of the web of the position limiting I-beam (1).

3. A tall formwork support structure according to claim 1, characterized in that: The transverse crossbar (4) comprises two transverse connecting rods (41), the two ends of the transverse connecting rod (41) are respectively a first hinged end (411) and a second hinged end (412), the first hinged ends (411) of the two transverse connecting rods (41) are hinged to each other; the second hinged ends (412) of the two transverse connecting rods (41) are respectively hinged to two adjacent vertical rods (3); the axis directions of the rotation axes of the first hinged end (411) and the second hinged end (412) of the transverse connecting rod (41) are arranged parallel to the axis direction of the vertical rod (3); the transverse connecting rod (41) is also provided with a limiting member, and the limiting member is used to limit the swing of the two transverse connecting rods (41).

4. A tall formwork support structure according to claim 3, characterized in that: The limiting member comprises a limiting sleeve (42) sleeved on the transverse connecting rod (41).

5. A tall formwork support structure according to claim 4, characterized in that: A limiting bolt (421) is threadedly inserted into the outer periphery of the limiting sleeve (42), and one end of the limiting bolt (421) extends into the inner cavity of the limiting sleeve (42).

6. A tall formwork support structure according to claim 1, characterized in that: The anchor (11) comprises a U-shaped bolt (111) and a limiting pressure plate (112); the U-shaped bolt (111) is pre-buried in the cast floor slab (2), and the two threaded sections of the U-shaped bolt (111) extend out of the surface of the cast floor slab (2); the limiting I-beam (1) is embedded between the two threaded sections of the U-shaped bolt (111); the limiting pressure plate (112) is sleeved on the two threaded sections of the U-shaped bolt (111) through two holes, and the limiting pressure plate (112) is abutted against the top of the limiting I-beam (1); the threaded sections of the U-shaped bolt (111) are all threadedly connected to the limiting nut (113), and the limiting nut (113) is tightly arranged against the side of the limiting pressure plate (112) facing away from the limiting I-beam (1).

7. A tall formwork support structure according to claim 6, characterized in that: The U-shaped bolts (111) are welded and fixed to the internal steel reinforcement structure of the cast floor slab (2).

8. A method for constructing a tall formwork support structure according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: Installation of the limiting I-beam (1): The limiting I-beam (1) is fixedly installed on the surface of the cast floor slab (2) through anchors (11); S2: Installing the vertical pole (3): Slide the vertical pole (3) into the corresponding limiting I-beam (1) through the bottom channel steel (31); slide the vertical pole (3) along the limiting I-beam (1) to a designated position; S3: Transverse limit of the vertical pole (3): connecting and limiting the adjacent vertical poles (3) on the same limiting I-beam (1) through the transverse crossbar (4); S4: longitudinal limit of the vertical poles (3): longitudinal connection and limit are performed on the vertical poles (3) on the adjacent limit I-beams (1) through the longitudinal cross bars (5).

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