High and large formwork support structure and construction method

Abstract

The application discloses a high and large formwork supporting structure and a construction method, which comprises matrix-arranged supporting columns with a regular octagonal cross section, side walls comprising interval track surfaces and flat surfaces, opposite flat surfaces between two adjacent supporting columns, track grooves connected with the track surfaces, detachable independent supporting frames connected with the top ends of the supporting columns, independent top formworks on the top of the independent supporting frames, floor supporting frames comprising four end nodes, frame supporting arms and a support arm, the frame supporting arms and the support arm being detachably connected with corresponding track grooves, and all the supporting arms of the four end nodes of the same floor supporting frame being detachably connected with a horizontal formwork platform, the floor supporting frame being provided with a floor formwork which is flushly attached with the independent top formwork, the formwork supporting structure of the application can effectively solve the problem of space occupation of full-frame scaffolds during simultaneous pouring of floors and wall columns, saves formwork time and improves formwork efficiency.

Description

Technical Field

[0001] This invention relates to the field of concrete component construction. More specifically, this invention relates to tall formwork support structures and construction methods. Background Technology

[0002] With the continuous development of society and economy, the construction organization of high-rise commercial buildings and large underground parking garages often encounters problems in the construction of high-rise formwork. The traditional method currently commonly used is to support the roof slab formwork by erecting full-span scaffolding. This method not only uses a large amount of scaffolding, but also fills the entire space under the roof slab when it is in use. Some areas cannot be used for other work, and it also seriously affects the organization of personnel and material transportation. Due to the structure of full-span scaffolding, it is basically impossible to partially dismantle the support before the concrete floor slab reaches the design strength in order to improve the turnover rate. If the entire support is dismantled and then re-supported, the original support effect will be difficult to achieve due to the damage to the support system.

[0003] To address the technical challenges of high-rise formwork, patent application CN106760497B discloses a high-rise formwork system for concrete floors using column support. This system uses concrete columns as supports, assembling a base frame, diagonal braces, support frames, struts, connecting beams, and intermediate horizontal supports before concrete pouring. Patent application CN115126225B discloses a floor slab formwork support assembly, which uses support components installed on the already poured concrete columns for the erection of top and beam formwork. However, the auxiliary support structure of this type of invention requires the use of jacking tools to lift the components. The high-altitude assembly work, which can only be completed based on already poured concrete columns and wall components, makes it impossible to pour beams, slabs and columns simultaneously. The construction process must be split into two steps: pouring columns and pouring beams and slabs. This extends the construction period by one concrete curing cycle. Furthermore, since this type of high formwork method must rely on already poured components, it is difficult to find suitable vertical components when facing large-span spaces. Therefore, it is necessary to invent a formwork support system that can be applied to high formwork, and can change from full-span support to partial support before the top slab concrete reaches the design strength, and can be hoisted as a whole after ground construction. Summary of the Invention

[0004] One objective of this invention is to provide a tall formwork support structure and construction method, which is applicable to the process of integral casting of beams, slabs and columns. After being assembled on the ground, it can be put into use after being simply fixed at high altitude by hoisting means. Moreover, most of the formwork can be dismantled while retaining some of the support when the concrete strength reaches the demolding requirements.

[0005] To achieve these and other advantages according to the invention, according to one aspect of the invention, the invention provides a tall formwork support structure and construction method, comprising:

[0006] The support columns are arranged in a matrix. The cross-section of the support column is a regular octagon. The side wall of the support column includes four spaced track surfaces and four spaced straight surfaces. The straight surfaces between two adjacent support columns are opposite each other. The track surfaces are connected to track grooves along the axis of the support column. The bottom of the support column is fixed to the ground. The top of the support column is detachably connected to an independent support frame. The top of the independent support frame supports an independent top template.

[0007] The floor slab support frame is a rectangular frame structure. The floor slab support frame is horizontal and its four ends are respectively connected to four support columns that form the four vertices of the same rectangle. The floor slab support frame includes four end nodes, each including a frame support arm and a support arm. The support arm matches the corresponding track groove and the two are detachably connected. All the support arms of the four end nodes of the same floor slab support frame are detachably connected to a horizontal formwork platform. The floor slab formwork is supported on the floor slab support frame. The top surface of the floor slab formwork is flush with the top surface of the independent top formwork and the four sides are attached.

[0008] Preferably, the end nodes are Y-shaped, each end node includes two horizontal and vertical support arms, the support arms of the four end nodes are opposite each other in pairs, and each pair of opposite support arms is connected to an outer frame beam. All end nodes and outer frame beams are connected to the formwork platform through support beams, and the outer frame beams are horizontally connected to multiple cantilever beams on the other side of the formwork platform.

[0009] Preferably, the formwork platform includes a rectangular inner frame and multiple inner frame beams, which intersect in a mesh pattern within the plane of the rectangular inner frame.

[0010] Preferably, the formwork platform, support beam, and outer frame beam have multiple support rods vertically connected upwards in a matrix on their upper surfaces, and all the support rods on the same floor slab support frame jointly support the same floor slab formwork.

[0011] Preferably, the track groove is two vertical and parallel strip steel plates, the strip steel plates are provided with fixing screw holes at intervals, the support arm is two vertically spaced support fixing plates that are attached to the strip steel plates, the support fixing plates are provided with through holes corresponding to the fixing screw holes, and the support fixing plates are bolted to the strip steel plates.

[0012] Preferably, the track groove is detachably connected to a steel bracket, the top surface of which is in contact with the bottom surface of the end node.

[0013] Preferably, the support column includes a fixed column section and multiple standard column sections. The bottom end of the fixed column section is connected to a column end plate, which is detachably connected to the ground by column foot bolts. The fixed column section and the standard column sections have the same cross-sectional shape and are aligned one by one. The top of the fixed column section and both ends of the standard column sections have cylindrical connecting sections extending axially. Every two aligned cylindrical connecting sections share a fastener on their outer periphery. The fastener includes two opposing arc-shaped clamps that match the size of the cylindrical connecting sections. The horizontal ends of the arc-shaped clamps extend outwards with flange sections, which are connected to each other by bolts. The flange sections intersect with the track groove.

[0014] Preferably, the two adjacent support columns are detachably connected to each other on their opposite flat surfaces by a transverse frame reinforcement structure.

[0015] Preferably, the construction method for the above-mentioned tall formwork support structure includes the following steps;

[0016] S1. When pouring concrete below the formwork floor, determine the location of the positioning columns and pre-embed column base bolts according to the structural layout of the formwork floor, and design the shape of the floor slab support frame.

[0017] S2. After completing the construction of the wall and column formwork for this floor, install the support columns and horizontal frame reinforcement structure for this floor by hoisting.

[0018] S3. Assemble the floor slab support frame on site. During assembly, ensure that the four end nodes of the floor slab support frame match the corresponding track grooves. After the floor slab support frame is assembled, lift it along the track groove to a position higher than the design position. After installing four steel brackets, lower the floor slab support frame onto the brackets. Then, complete the bolt connection between the support arm and the track groove.

[0019] S4. Install the independent support frame at the top of the support column, and then start laying the floor slab formwork and independent top formwork. Ensure that the floor slab formwork and independent top formwork, as well as the matching steel pipes and timber, do not overlap. After the reinforcement of the slab is laid, pour concrete and cure it.

[0020] S5. After the concrete strength of the floor slab reaches the strength requirement for formwork removal, remove the steel corbels, install a hydraulic support system under the floor slab support frame, remove the bolts between the end nodes and the track groove after inspection, and slowly use the hydraulic support system to drive the floor slab support frame to slowly lower it to the ground along the track groove and complete the dismantling.

[0021] S6. Once the concrete strength of the floor slab and wall columns reaches the design strength, the support columns shall be removed.

[0022] The present invention has at least the following beneficial effects:

[0023] First, the high formwork support structure and construction method of the present invention can meet various scenarios that require high formwork by setting up support columns, and can be applied to the construction process of simultaneous pouring of beams, slabs and columns, which greatly shortens the construction period.

[0024] Secondly, the tall formwork support structure and construction method of the present invention can be spliced ​​with the ground, and can be fixed in place with simple operation after hoisting, making construction relatively simple.

[0025] Third, the tall formwork support structure and construction method of the present invention can remove other parts of the formwork while retaining the support within the range of the support columns after the concrete strength of the top slab reaches the demolding requirements, which is conducive to the turnover of equipment.

[0026] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0027] Figure 1 This is an overall schematic diagram of a tall formwork support structure in one technical solution of the present invention;

[0028] Figure 2 This is a schematic diagram of a floor slab support frame for a tall formwork support structure in one technical solution of the present invention;

[0029] Figure 3 This is a schematic diagram of a formwork support platform for a tall formwork support structure in one technical solution of the present invention;

[0030] Figure 4 This is a schematic diagram of the formwork support in the main formwork area of ​​a tall formwork support structure according to one technical solution of the present invention;

[0031] Figure 5 This is a schematic diagram of the support rod of the tall formwork support structure in one technical solution of the present invention;

[0032] Figure 6 This is a schematic diagram of the end node of the tall formwork support structure in one technical solution of the present invention;

[0033] Figure 7 This is a schematic diagram of the support column of a tall formwork support structure in one technical solution of the present invention;

[0034] Figure 8 This is a partition diagram of the formwork for a tall formwork support structure in one technical solution of the present invention. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can implement it based on the description.

[0036] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0037] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are conventional methods, and the structures and components described are commercially available. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0038] like Figures 1-8As shown, this invention provides a tall formwork support structure, including matrix-arranged support columns 1. The support column 1 has a regular octagonal cross-section. The sidewall of the support column 1 includes four spaced track surfaces 101 and four spaced straight surfaces 102. The straight surfaces 102 between two adjacent support columns 1 are opposite each other. The track surfaces 101 are connected to track grooves 11 along the axial direction of the support column. The bottom of the support column 1 is fixed to the ground, and the top of the support column 1 is detachably connected to an independent support frame 15. The top of the independent support frame 15 supports an independent top formwork 3. A floor slab support frame 2 is a rectangular frame structure. The floor slab support frame 2 is horizontal, and its four ends are respectively connected to the four support columns 1 that form the four vertices of the same rectangle. The floor slab support frame 2 includes four end nodes 20, each including a frame support arm 201 and a support arm 202. The support arm 202 matches the corresponding track groove 11, and the two are detachable. The connection is detachable. All the supporting arms 201 of the four end nodes 20 of the same floor slab support frame 2 are detachably connected to a horizontal formwork platform 21. The floor slab support frame 2 supports the floor slab template 30. The floor slab template 30 is flush with the top surface of the independent top template 3 and fits on all four sides. In this technical solution, the floor slab support frame 2 is a steel frame structure and can be assembled on site by bolts and connecting plates. The floor slab support frame 2 supports other steel frame components with four end nodes 20. The track groove 11 consists of two parallel strip steel plates 110. The support arm 202 of each end node 20 matches the shape of the track groove 11 and is embedded in the inner side of the track groove 11, thus restricting its planar displacement. It can move up and down along the track groove 11 when not connected to it. When all four support arms 202 are restricted by the planar displacement of the track groove 11, the floor slab support frame 2 will only move vertically and will not move horizontally when it is pulled or pulled down.

[0039] In this technical solution, the frame size of the floor slab support frame 2 is smaller than the smallest rectangle enclosed by the four corresponding support columns 1 on the plane. The lifting and lowering of the floor slab support frame 2 will not be obstructed. After the floor slab support frame 2 is raised to the appropriate position, the position of the entire floor slab support frame 2 is fixed by fixing the support arm 202 to the track groove 11. Optionally, the support arm 202 and the track groove 11 can be fixed by setting connecting bolts or by adding an additional support structure. The floor slab support frame 2 adopts a light steel structure or a space frame structure to reduce its own weight and facilitate on-site workers to complete vertical displacement using small hoists or hydraulic support rods and other tools. The formwork support platform 21 is a steel lattice structure. The formwork support platform 21 serves as a platform that can provide high-altitude operation and formwork support for the formwork system, allowing the top formwork support system to sit on the formwork support platform 21, which greatly shortens the distance between the top and bottom of the aluminum formwork system or the wooden formwork system.

[0040] In this technical solution, both the floor slab formwork 30 and the independent roof formwork 3 are made of traditional wooden formwork. Before hoisting, the dimensions of each formwork needs to be designed separately. The wooden formwork obtained from the market is divided into small pieces according to the design results and then hoisted onto the floor slab support frame 2. Subsequently, the floor slab formwork 30 and the independent roof formwork 3 are laid, fixed and assembled into a complete floor slab formwork 30 and independent roof formwork 3 by manual labor using conventional construction methods. The floor slab formwork 30 and the independent roof formwork 3 are installed according to the design elevation requirements, and are flush and fit together at the junction. If the gap at the joint is large, flexible sealing materials such as sponge strips are needed to seal the gap.

[0041] In this technical solution, the floor slab formwork 30 can be divided into a main formwork area 301 and an edge formwork area 302. Since the size of the floor slab support frame 2 is slightly smaller than the rectangular area enclosed by the corresponding support columns 1, there are no direct supporting components below the area between two adjacent floor slab support frames 2 located between the two support columns 1 or between the floor slab support frame 2 and the wall column formwork 6. Therefore, a cantilever beam 222 can be horizontally added outward at the corresponding location of the floor slab support frame 2 to provide direct support for the edge formwork area 302. The formwork area projected onto the cantilevered portion of the floor slab formwork 30 is the edge formwork area 302, and the formwork area projected onto the floor slab support frame 2 is the main formwork area 301. When there are no lateral connection reinforcement measures between the support columns 1, the cantilevered portion... The floor slab support frame 2 can move vertically freely. The floor slab formwork 30 can transfer itself and its load to the floor slab support frame 2 and the matching cantilever beam 222. The load of the independent top formwork 3 can only be transferred downward to the top of the support column 1 through the independent support frame 15. The independent support frame 15 is a steel frame made according to the shape of the independent top formwork 3 and the system of using formwork. Each floor slab formwork 30 and independent top formwork 3 can be regarded as a whole formwork plate. The auxiliary support components of the formwork below the floor slab formwork 30 and independent top formwork 3, such as steel pipes 32 and timber 33, do not extend beyond the range of their respective floor slab formwork 30 or independent top formwork 3. In this way, the floor slab formwork 30 is not affected by other components after it descends with the floor slab support frame 2.

[0042] In this technical solution, when the concrete strength of the top slab reaches the demolding strength, such as 70%, the connection between the floor slab support frame 2 and the support column 1 is released and the floor slab support frame 2 is lowered. At this time, the support column 1 can still maintain support without being unloaded until the concrete strength of the top slab reaches the design value. Since the floor slab support frame 2 only has its own weight and the floor slab formwork 30 and supporting measures structure supported on it after unloading, its weight is relatively light. At this time, small hydraulic supports, pulley systems and other devices can be used to complete the lowering. In this technical solution, all structures do not require the prior pouring of wall and column structures on this floor to provide support points. All structures can be manufactured and processed in the factory and assembled and hoisted on site. Furthermore, the supports can be partially removed to improve the turnover rate of components.

[0043] In another technical solution, the end nodes 20 are Y-shaped and include two horizontally and vertically aligned support arms 201. The support arms 201 of the four end nodes 20 are paired, and each pair of paired support arms 201 is connected to an outer frame beam 22. All end nodes 20 and the outer frame beam 22 are connected to the formwork platform 21 via support beams 221. The outer frame beam 22 is horizontally connected to multiple cantilever beams 222 on the other side of the formwork platform 21. In this technical solution, the support arms 201 and the outer frame beam 22 are connected by bolts. Optionally,... The dimensions of the formwork platform 21 are no larger than the rectangle enclosed by the support arm 201 and the outer frame beam 22. The height of the formwork platform 21 and the support arm 201 can also be adjusted appropriately according to the site requirements. The formwork platform 21 can be horizontally higher than the height of the support arm 201, or parallel to or lower than the height of the support arm 201. The formwork platform 21 is assembled from steel profiles to avoid deformation or deflection under load. The cantilever beam 222 directly supports the edge formwork area 301, and the length and position of the cantilever beam 222 must not overlap with the cantilever beam 222 of any other floor slab support frame 2.

[0044] In another technical solution, the formwork platform 21 includes a rectangular inner frame 210 and multiple inner frame beams 211. The inner frame beams 211 intersect in a mesh pattern within the plane of the rectangular inner frame. Support beams 221 are connected to the outer side or bottom surface of the rectangular inner frame 210. The inner side of the rectangular inner frame 210 is connected to the inner frame beams 211. The top surface of the inner frame beams 211 is flush with the top surface of the rectangular inner frame 210.

[0045] In another technical solution, multiple support rods 34 are vertically connected upwards in a matrix on the upper surfaces of the formwork platform 21, support beam 221, outer frame beam 22, and cantilever beam 222. All support rods 34 on the same floor slab support frame jointly support the same floor slab formwork 30. In this technical solution, the support rod 34 includes a support cylinder seat 340, the bottom end of which is welded or bolted to the contact surface. The inner wall of the support cylinder seat 340 is threaded, and an adjusting screw 341 is fitted inside the support cylinder seat 340 and extends upwards. A U-shaped bracket 342 is rotatably connected to the rod 341. The support rod 34 can be installed at the corresponding position on the section of the floor slab support frame 2 assembled on the ground. The support rod 34 and the floor slab support frame 2 can be connected by bolts or by welding. The support rod 34 is vertical. The U-shaped bracket 342 can support the steel pipe 32 and the timber 33 according to the conventional wooden formwork support system for the top slab construction process. The height of the U-shaped bracket 342 can be finely adjusted by turning the adjusting screw 341 below, so as to better control the levelness of the floor slab formwork 30 and the independent top formwork 3.

[0046] In another technical solution, the track groove 11 consists of two vertical and parallel strip steel plates 111, with fixed screw holes 110 spaced apart on the strip steel plates 111. The support arm 202 consists of two rows of vertically spaced support fixing plates 202A that are attached to the strip steel plates 111. The support fixing plates 202A have through holes corresponding to the fixed screw holes. The support fixing plates 202A are bolted to the strip steel plates 111. In this technical solution, the fixed support plates 202A are welded to the end node 20 and extend outward toward the track groove 11. Each row of fixed support plates 202A is attached to the inner side wall of the strip steel plates 111. The spacing between the fixed support plates 202A allows construction personnel to easily bolt each fixed support plate 202A to the strip steel plates 111 through the fixed screw holes 110.

[0047] In another technical solution, the track groove 11 is detachably connected to a steel bracket 4. The top surface of the steel bracket 4 is in contact with the bottom surface of the end node 20. The steel bracket 4 is in the shape of a right trapezoid and the top surface is flat. The width of the steel bracket 4 is equal to the distance between the two inner side walls of the strip steel plate 111. The steel bracket 4 can be bolted to the track groove 11 before or after the floor support frame 2 is lifted from the ground, depending on the hoisting method. This allows the floor support frame 2 to be placed on the steel bracket 4 through the end node 20. At this time, the through hole on the fixed support plate 202A on the end node 20 matches the fixed screw hole 110 on the strip steel plate 111, which facilitates the construction personnel to complete the fixing. When it is necessary to lower the floor support frame 2, the connection between the end node 20 and the track groove 11 is removed. After ensuring that the floor support frame 2 is temporarily fixed in place by the hydraulic support rod or the winch device, the steel bracket 4 is removed.

[0048] In another technical solution, the support column 1 includes a fixed column section 12 and multiple standard column sections 13. The bottom end of the fixed column section 12 is connected to a column end plate 120, which is detachably connected to the ground via column base bolts 121. The fixed column section 12 and the standard column sections 13 have the same cross-sectional shape and are aligned one by one. The top of the fixed column section 12 and both ends of the standard column sections 13 have axially elongated cylindrical connecting sections 14. Every two aligned and connected cylindrical connecting sections 14 share a common outer hoop. A fastener 140 is fitted, comprising two opposing arc-shaped clamps 1401. The arc-shaped clamps 1401 are sized to match the cylindrical connecting section 14. The horizontal ends of the arc-shaped clamps 1401 extend outwards with flange sections 1402, which are bolted together. The flange sections 1402 intersect with the track groove 11. In this technical solution, since the dismantling of the high formwork is all conducted indoors, the dismantling of the support column 1 needs to be fully considered. For off-site transport, if the support column 1 is too long, it will be difficult to operate on-site. Therefore, the support column 1 is segmented. The column base bolts 121 are pre-embedded during the pouring of concrete on the ground or bottom floor and extend upwards. The column end plate 120 is provided with through holes to fit the column base bolts 121 and tighten the nuts to prevent displacement of the column end plate 120. To ensure that the floor slab support frame 2 can move vertically along the track groove 11 without obstruction, the fixed column section 12 and the standard column section 13 must be completely aligned and must not be outwards. The prominent structural feature is that the cylindrical connecting section 14 is a component that extends outward from the inner wall of the fixed column section 12 or the standard column section 13. There is no gap between the upper and lower cylindrical connecting sections 14 after they are joined together. The height of the arc-shaped hoop 1401 is the sum of the heights of the two joined arc-shaped connecting sections 14, and the thickness is equal to the thickness of multiple standard column sections 13. The two arc-shaped hoop 1401 are joined together by bolts to form a fastener 140 to prevent horizontal displacement of the joined arc-shaped connecting sections 14.

[0049] In another technical solution, a transverse frame reinforcement structure 5 is detachably connected between the opposite flat surfaces 102 of the two adjacent support columns 1. The transverse frame reinforcement structure 5 can be a steel section, Bailey beam, diagonal brace, or other structure to improve the integrity between the support columns 1 and prevent the support columns 1 from deforming under horizontal stress during construction. The installed transverse frame reinforcement structure 5 shall not affect the vertical displacement of the floor slab support frame 2.

[0050] In another technical solution, the construction method of the above-mentioned tall formwork support structure includes the following steps:

[0051] S1. When pouring concrete below the formwork floor, determine the location of the support column 1 and pre-embed column foot bolts 121 according to the structural layout of the formwork floor, and design the shape of the floor slab support frame 2.

[0052] S2. After completing the construction of the wall and column formwork 6 of this floor, the support column 1 and the horizontal frame reinforcement structure 5 of this floor are installed by hoisting.

[0053] S3. Assemble the floor slab support frame 2 on site. During assembly, ensure that the four end nodes 20 of the floor slab support frame 2 are matched with the corresponding track grooves 11. After the floor slab support frame 2 is assembled, it is hoisted along the track grooves 11 to a position higher than the design position. Then, install the four steel brackets 4 and lower the floor slab support frame 2 onto the steel brackets 4. Finally, complete the bolt connection between the support arms 202 and the track grooves 11. Specifically, before assembling the floor slab support frame 2 as a whole, it is necessary to ensure that the support arms of the four end nodes 20 are aligned. 202 has been successfully placed in the track groove 11. To avoid the inability to smoothly slide all the support arms 202 of the floor slab support frame 2 into the track groove 11 at the four corners due to tolerances or other reasons after closing, the support arms 202 can be fixed to the bottom fixing screw holes 110 of the strip steel plate 111 before installation. The floor slab support frame 2 can be lifted to the design position by a crane or winch, and steel brackets 4 can be installed in the corresponding positions to provide a placement platform for the floor slab support frame 2.

[0054] S4. Install the independent support frame 15 at the top of the support column 1, and then begin laying the floor slab formwork 30 and the independent top formwork 3, ensuring that the floor slab formwork 30 and the independent top formwork 3, as well as the matching steel pipes 32 and timber 33, do not overlap. After completing the laying of the slab reinforcement, pour concrete and cure it. Specifically, after all the floor slab support frames 2 are lifted and fixed in place, hoist the independent support frame 15 to the top of each support column. The support rod 34 can be fixed on the independent support frame 15. Construction personnel will place the support frame 15 on-site. When laying steel pipes 32 and timber 33 on the floor slab support frame 2, it is necessary to ensure that the steel pipes 32 and timber 33 belonging to the floor slab formwork 30 and the independent top formwork 3 do not extend beyond their respective formwork areas. After the steel pipes 32 and timber 33 are completed, the floor slab formwork 30 and the independent top formwork 3 are laid and fixed using the pre-cut wooden formwork. For the joints between adjacent floor slab formwork 30 and between adjacent floor slab formwork 30 and independent top formwork 3, sponge strips or other sealing methods are used to prevent grout leakage.

[0055] S5. After the concrete strength of the floor slab reaches the strength required for demolding, install a hydraulic support system under the floor slab support frame 2. After inspection, remove the bolts between the end node 20 and the track groove 11, remove the steel bracket 4, and slowly use the hydraulic support system to drive the floor slab support frame 2 to slowly lower it to the ground along the track groove 11 and complete the dismantling. Specifically, when the concrete reaches the demolding strength, the floor slab support frame 2 has completed its support task. The floor slab support plate 2 can be unloaded by adjusting the length of the adjusting screw 341 of the support rod 34 on the floor slab support frame 2. Before the floor slab support frame 2 is lowered, the transverse frame reinforcement structure 5 that affects the lowering of the part of the floor slab support frame 2 corresponding to the edge template area 302 in the floor slab template 30 needs to be removed. After the floor slab support frame 2 is on the ground, it is removed. At this time, only the support column 1 and its independent support frame 15 are used for subsequent support work in this floor.

[0056] S6. After the concrete of the floor slab and the concrete of the wall column reach the design strength, the support column 1 is removed. Specifically, the removal of a standard column section 13 can be completed with the assistance of hydraulic cylinder struts.

[0057] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A construction method for a tall formwork support structure, comprising a tall formwork support structure, characterized in that, High-rise formwork support structures include: The support columns are arranged in a matrix. The cross-section of the support column is a regular octagon. The side wall of the support column includes four spaced track surfaces and four spaced straight surfaces. The straight surfaces between two adjacent support columns are opposite each other. The track surfaces are connected to track grooves along the axis of the support column. The bottom of the support column is fixed to the ground. The top of the support column is detachably connected to an independent support frame. The top of the independent support frame supports an independent top template. The floor slab support frame is a rectangular frame structure. The floor slab support frame is horizontal and its four ends are respectively connected to four support columns that form the four vertices of the same rectangle. The floor slab support frame includes four end nodes, each of which includes a frame support arm and a support arm. The support arm matches the corresponding track groove and the two are detachably connected. All the support arms of the four end nodes of the same floor slab support frame are detachably connected to a horizontal formwork platform. The floor slab formwork is supported on the floor slab support frame. The top surface of the floor slab formwork is flush with the top surface of the independent top formwork and the four sides are attached to it. The end nodes are Y-shaped and include two horizontal and vertical support arms. The support arms of the four end nodes are opposite each other in pairs. Each pair of opposite support arms is connected to an outer frame beam. All end nodes and outer frame beams are connected to the formwork platform through support beams. The outer frame beam is horizontally connected to multiple cantilever beams on the other side of the formwork platform. The track groove is detachably connected to a steel bracket, the top surface of which is in contact with the bottom surface of the end node; The two adjacent support columns are detachably connected to each other by a transverse frame reinforcement structure on their opposite straight surfaces. The support column includes a fixed column section and multiple standard column sections. The bottom end of the fixed column section is connected to a column end plate, which is detachably connected to the ground by column foot bolts. The fixed column section and the standard column sections have the same cross-sectional shape and are aligned one by one. The top of the fixed column section and both ends of the standard column sections are axially provided with cylindrical connecting sections. Every two aligned cylindrical connecting sections share a fastener on their outer periphery. The fastener includes two oppositely arranged arc-shaped clamps. The arc-shaped clamps match the size of the cylindrical connecting sections. The horizontal ends of the arc-shaped clamps extend outward with flange sections. The two opposite flange sections are connected by bolts. The flange sections intersect with the track groove. The construction method includes the following steps: S1. When pouring concrete below the formwork floor, determine the location of the support columns and pre-embed column base bolts according to the structural layout of the formwork floor, and design the shape of the floor slab support frame. S2. After completing the construction of the wall and column formwork for this floor, install the support columns and horizontal frame reinforcement structure for this floor by hoisting. S3. Assemble the floor slab support frame on site. During assembly, ensure that the four end nodes of the floor slab support frame match the corresponding track grooves. After the floor slab support frame is assembled, lift it along the track groove to a position higher than the design position. Then, install four steel brackets and lower the floor slab support frame onto the brackets. Finally, complete the bolt connection between the support arm and the track groove. S4. Install the independent support frame at the top of the support column, and then start laying the floor slab formwork and independent top formwork. Ensure that the floor slab formwork and independent top formwork, as well as the matching steel pipes and timber, do not overlap. After the reinforcement of the slab is laid, pour concrete and cure it. S5. After the concrete strength of the floor slab reaches the strength requirement for formwork removal, install a hydraulic support system under the floor slab support frame. After inspection, remove the bolts between the end nodes and the track groove, remove the steel brackets, and slowly use the hydraulic support system to drive the floor slab support frame to slowly lower it to the ground along the track groove and complete the dismantling. S6. Once the concrete strength of the floor slab and wall columns reaches the design strength, the support columns shall be removed.

2. The construction method of the tall formwork support structure as described in claim 1, characterized in that, The formwork platform includes a rectangular inner frame and multiple inner frame beams, which intersect in a mesh pattern within the plane of the rectangular inner frame.

3. The construction method for the tall formwork support structure as described in claim 2, characterized in that, The formwork platform, support beams, outer frame beams, and cantilever beams have multiple support rods vertically connected in a matrix on their upper surfaces. All the support rods on the same floor slab support frame jointly support the same floor slab formwork.

4. The construction method of the tall formwork support structure as described in claim 3, characterized in that, The track groove consists of two vertical and parallel strip steel plates with fixed screw holes spaced apart. The support arm consists of two vertically spaced support fixing plates that fit against the strip steel plates. The support fixing plates have through holes corresponding to the fixed screw holes, and the support fixing plates are bolted to the strip steel plates.

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