A cast-in-place support rapid construction method applicable to height and span changes

Abstract

The application discloses a cast-in-place support rapid construction method applicable to certain height and span changes, and belongs to the technical field of bridge engineering construction, and comprises height support assemblies and horizontal support assemblies; the height support assembly comprises an adjustable height assembly and a fixed height assembly; the adjustable height assembly comprises a stand column; the fixed height assembly comprises a straight-leg support column and an inclined-leg support column; the bottom of the adjustable height assembly is connected with the top of the fixed height assembly through a connecting flange; the horizontal support assembly comprises a brace and an adjustable sleeve pipe, and the adjustable sleeve pipe can adjust the horizontal distance between two height support assemblies. Through the height support assembly processed outside the site, the assembly is composed of adjustable stand columns at the four corners of a rectangle, connecting flanges and a connecting system, so that the problem that a plurality of sets of components or a large number of on-site processing are needed in a traditional system to adapt to height and span changes is solved, thereby reducing the on-site adjustment workload and improving the elevation control precision.

Description

Technical Field

[0001] This invention relates to a rapid construction method for cast-in-place supports that can be adapted to changes in height and span, belonging to the field of bridge engineering construction technology. Background Technology

[0002] With the rapid development of long-distance bridge projects such as high-speed railways and highways, continuous beams and simply supported beams account for a large proportion of these projects, placing higher demands on construction quality and schedule. These projects are often carried out under constrained conditions, such as crossing adverse geological formations, existing roads, or river channels. The support system must be able to withstand the vertical loads of the formwork and wet concrete, as well as the horizontal loads during construction, while also accommodating off-site prefabrication, rapid on-site hoisting, and component reuse.

[0003] Existing cast-in-place beam construction technologies mainly include: full-span disc-lock scaffolding and steel pipe Bailey panel full-area scaffolding. Traditional full-span disc-lock and Bailey panel systems offer flexible construction, but require a large amount of on-site erection and reinforcement work, relying heavily on on-site welding and connection operations. These systems have high requirements for the bearing capacity of the foundation under the beam, usually requiring pre-loading or static load tests according to specifications. When the clearance under the beam is large (e.g., exceeding approximately 20 m) or the geological conditions are unfavorable, the overall safety and economy decrease. Modular scaffolding facilitates height adjustment but is mostly single-point vertical support, resulting in insufficient overall stiffness and lateral displacement resistance. Existing drop beam systems generally lack controllable release, standardized nodes, and integrated off-site processing, leading to low on-site assembly efficiency, complex dismantling, and low reuse rate.

[0004] The main problems with existing technologies are as follows: existing cast-in-place supports have poor adaptability to different pier heights and beam bottom elevations, requiring separate design or fabrication of supports for different heights, and involving numerous temporary treatments such as on-site cutting, welding, and shimming. Elevation control accuracy is low, and construction errors are large. Traditional adjustable columns are prone to slippage, settlement, or instability under heavy loads; single-point or planar support structures have insufficient overall stiffness and poor lateral stability. The horizontal force path of traditional support systems is unclear, easily leading to unilateral stress, additional bending moments, and unfavorable displacements. Full-span supports or Bailey supports are highly dependent on the bearing capacity of the foundation under the beam, requiring piling or foundation enlargement. Existing supports have poor adaptability to span changes, low component versatility, high risks and low efficiency in formwork removal and dismantling processes, difficulty in reusing components, high on-site fabrication ratio, large fluctuations in construction quality, and long construction periods.

[0005] Based on the above problems, a rapid construction method for cast-in-place supports that can be applied to changes in height and span is proposed to solve the above problems. Summary of the Invention

[0006] The technical problem to be solved by this invention is to provide a rapid construction method for cast-in-place supports that can be adapted to changes in height and span. It solves the problems of poor adaptability of supports to different pier heights and beam bottom elevations, poor lateral stability, high dependence on the bearing capacity of the foundation under the beam, poor adaptability of existing supports to changes in span, and low versatility of components.

[0007] The technical problem to be solved by this invention is achieved by the following technical solution: a cast-in-place support system applicable to variations in height and span, comprising... Multiple piers, with supports installed on the sides of each pier. The support frame includes a height support component and a horizontal support component, with the height support component provided on both sides of the horizontal support component; The height support assembly includes a height adjustment assembly and a height fixing assembly; the height adjustment assembly includes uprights located at the four corners of a rectangle, and the height of the uprights can be adjusted. The column is provided with a column head at the top and a connecting flange at the bottom. The top of the column is connected by a connecting system. The fixed height assembly includes two straight-leg support columns and two inclined-leg support columns. The straight-leg support columns are respectively located at the endpoints of the short side of one side of the rectangle, and the inclined-leg support columns are located at the endpoints of the short side of the other side of the rectangle. The straight-leg support columns and the inclined-leg support columns are connected by a support system. The bottom of the height adjustment component and the top of the height fixing component are connected by the connecting flange; The horizontal support assembly includes a brace and an adjusting sleeve. One side of the adjusting sleeve is connected to the brace, and the other side is connected to the top of the inclined leg support column. The side of the brace away from the adjusting sleeve is connected to the top of another inclined leg support column. The brace and the adjusting sleeve are connected by a fixing system. The adjusting sleeve can adjust the horizontal distance between the two height support assemblies. The horizontal support component is used to limit the horizontal displacement of the height support component and balance the horizontal load during construction.

[0008] Preferably, the bottom of the height support component is connected to the bearing platform via a vertical anchoring device, and horizontal anchoring devices are provided on both sides of the straight leg support column.

[0009] Preferably, the top of both the straight-leg support column and the inclined-leg support column is provided with a rigid node, the rigid node including a node plate and a stiffener, and the rigid node is connected to the brace by a double-sided fillet weld.

[0010] Preferably, the horizontal anchoring device includes a lateral embedded part on the pier body and a connecting bolt. One side of the lateral embedded part is set on the surface of the pier body by a climbing cone, and the other side is connected to the top of the straight leg support column by the connecting bolt.

[0011] Preferably, the adjusting sleeve includes an outer sleeve and an inner core tube, and the length can be adjusted and locked through a pin hole or a threaded adjusting member.

[0012] Preferably, the vertical anchoring device includes a pre-embedded steel plate in the bearing platform and bolts, wherein the pre-embedded steel plate in the bearing platform is connected to the straight leg support column or the inclined leg support column through the bolts; the load of the bracket is transferred from the height support component to the vertical anchoring device and then to the bearing platform.

[0013] Preferably, the top of the column head is provided with a dropping beam device, the top of which can be used to cast the formwork support system, and the dropping beam device can unload the support after the formwork support system is cast.

[0014] Preferably, the height support components, fixed height components, horizontal support components, vertical anchoring devices, unloading beam devices, and formwork support systems are fabricated off-site and installed by hoisting.

[0015] A rapid construction method for cast-in-place scaffolding adaptable to variations in height and span is disclosed. The method involves assembling and processing a cast-in-place scaffolding system adaptable to variations in height and span, and includes the following steps: S1. Off-site fabrication and manufacturing of formwork support systems, unloading beam devices, height adjustment components, height fixing components, horizontal support components, vertical anchoring devices, and horizontal anchoring devices according to drawings; S2. Before the foundation is poured, vertical anchoring devices are pre-embedded at the corresponding positions of the foundation according to the design, and horizontal anchoring devices are pre-embedded at the corresponding positions of the pier body, and the foundation and pier body are constructed. S3. The lifting equipment is used to install the fixed height components on both sides as a whole. The bottom end of the fixed height component is connected to the vertical anchoring device, and the top end of the fixed height component is set as a rigid node and is connected and fixed to the pier body through the horizontal anchoring device. S4. Install the horizontal support assembly, which includes a brace and an adjusting sleeve. The brace is connected to the inclined leg support column through a rigid node. Adjust the length of the adjusting sleeve and connect the adjusting sleeve to the inclined leg support column on the other side, and ensure that the horizontal load is balanced in the internal forces of the structure. S5. Install the height adjustment component and connect it to the fixed height component via a connecting flange. Set up the connection system, support system, and fixing system as needed to ensure overall stability. S6. Install the unloading beam device and connect it to the height adjustment component. After adjusting the elevation of the unloading beam device, install the formwork support system to complete the installation of the cast-in-place support.

[0016] Preferably, in S4, the rigid node simultaneously bears the vertical load and transfers the horizontal load to the horizontal support component.

[0017] The beneficial effects of this invention are: (1) Through this invention, by processing the height support component off-site, the component consists of adjustable columns at the four corners of a rectangle, connecting flanges, and a connection system, it is possible to quickly adapt to and accurately position different elevations, which solves the problem that traditional systems require multiple sets of components or a large amount of on-site processing to adapt to height changes, thereby reducing the workload of on-site adjustments and improving the accuracy of elevation control.

[0018] (2) Through this invention, the column height adjustment can be reliably and repeatedly positioned, ensuring no relative slippage occurs under wet concrete loads, thus guaranteeing construction safety and quality. The fixed-height components form a rigid triangular truss structure, significantly improving lateral and torsional restraint capabilities. This provides reliable lateral stability to address the problem of insufficient overall stiffness of single-point vertical supports, reducing the risk of lateral displacement and torsion under horizontal loads or uneven construction loads. The rigid nodes, connected using double-sided fillet welds or high-strength bolts, achieve high-rigidity force transmission and assemblability, solving the shortcomings of existing nodes that lack sufficient stiffness or require extensive on-site welding. This ensures that horizontal loads are transferred to the horizontal support components through the nodes and closed in terms of structural internal forces.

[0019] (3) Through this invention, a horizontal support component is set up, including a brace and an adjusting sleeve, and a fixing system is used to achieve a reliable connection between the brace and the sleeve, so as to realize the transmission and balance of the horizontal load at mid-span, avoid unfavorable bending moment or excessive displacement of unilateral support, and improve the overall stress closure; a vertical anchoring device is set up to connect the height support component directly to the existing pile cap, so as to transfer the vertical load to the pile cap without additional piling or foundation expansion, fundamentally reducing the dependence on the bearing capacity of the foundation, reducing the risk of uneven settlement and the investment in foundation pit / pile foundation. Lateral embedded parts and horizontal anchoring devices are set up in the pier body, and horizontal anchoring is implemented at the top of the fixed height component to achieve reliable constraint against lateral thrust and wind load during the construction stage, avoid overall slippage or overturning, improve safety and reduce the need for temporary reinforcement.

[0020] (4) Through this invention, an adjusting sleeve is set up with a pin hole or threaded adjusting part to realize span adjustment and locking, so as to realize the ability of the same set of components to quickly adapt to different spans, reduce the types of components and transportation / storage costs, and improve on-site assembly efficiency. A controllable release unloading beam device is set up so that the formwork support can be unloaded and quickly removed after the concrete reaches the design strength, so as to realize safe and controllable removal, improve the component reuse rate and shorten the formwork removal and dismantling period, and solve the problems of low removal efficiency and high safety hazards of traditional shearing or on-site modified unloading beams. An off-site integrated processing and numbered formwork support system and bracket components are set up to realize prefabricated and standardized production and quality controllability, improve off-site processing accuracy, reduce on-site welding and processing volume, thereby reducing on-site labor intensity, accelerating construction progress and improving quality stability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the height adjustment component structure of the present invention.

[0023] Figure 3 This is a schematic diagram of the fixed-height component structure of the present invention.

[0024] Figure 4 This is a schematic diagram of the horizontal support component structure of the present invention.

[0025] Figure 5 This is an overall schematic diagram of the fixed height component of the present invention. In the diagram: 1-Height adjustment component, 11-Column, 12-Connection system, 13-Connection flange, 14-Column head, 2-Height fixing component, 21-Straight leg support column, 22-Angled leg support column, 23-Support system, 24-Rigid node, 3-Horizontal support component, 31-Support brace, 32-Adjusting sleeve, 33-Fixing system, 4-Vertical anchoring device, 5-Horizontal anchoring device, 6-Unloading beam device, 7-Formwork support system. Detailed Implementation

[0026] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this invention, the invention will be further described below in conjunction with specific embodiments.

[0027] Example 1 like Figures 1-5 As shown, a cast-in-place support that can be adapted to changes in height and span includes a height support component and a horizontal support component 3, with height support components provided on both sides of the horizontal support component 3.

[0028] The height support assembly includes an adjustable height assembly 1 and a fixed height assembly 2.

[0029] The height adjustment component 1 includes four columns 11 of equal height set at the four corners of a rectangle. The top of each column 11 is provided with a column head 14, and the bottom of each column 11 is provided with a connecting flange 13. The columns 11 are connected to each other by a connecting system 12 set between the columns 11.

[0030] The fixed height assembly 2 includes two straight leg support columns 21 and two inclined leg support columns 22. The straight leg support columns 21 are respectively located at the endpoints of the short side of one side of the rectangle, and the inclined leg support columns 22 are located at the endpoints of the short side of the other side of the rectangle. The straight leg support columns 21 and the inclined leg support columns 22 are connected by a support system 23.

[0031] The bottom of the height adjustment component 1 is connected to the top of the height fixing component 2 via a connecting flange 13.

[0032] The horizontal support assembly 3 includes a brace 31 and an adjusting sleeve 32. One side of the adjusting sleeve 32 is connected to the brace 31, and the other side is connected to the top of the inclined leg support column 22. The side of the brace 31 away from the adjusting sleeve 32 is connected to the top of another inclined leg support column 22. The brace 31 and the adjusting sleeve 32 are connected by a fixing system 33. The adjusting sleeve 32 can adjust the horizontal distance between the two height support assemblies.

[0033] Reference Figure 2 The height adjustment assembly 1 includes four columns 11 of equal height, located at the four corners of a rectangular plane. Each column has a column head 14 at the top and a connecting flange 13 at the bottom. The tops of the columns 11 are connected to each other via a connecting system 12.

[0034] In this embodiment, the connection system 12 is composed of circular steel pipes with a diameter of 426 mm. The connection system can be rigidly connected to the top of the four columns 11, ensuring that the columns 11 can jointly support the unloading beam device 6 and the formwork support system 7.

[0035] Each column 11 has a connecting flange 13 welded to its bottom. The connecting flange 13 has several reserved holes, which can be connected to the straight leg support column 21 or the inclined leg support column 22 by bolts.

[0036] In this embodiment, the column 11 adopts a sleeve-type telescopic structure or a screw thread adjustment structure, and the height is adjusted and locked through a pin hole or a threaded adjustment component. After adjustment, it is locked by tightening the lock nut to ensure reliable elevation positioning and prevent relative slippage under construction loads.

[0037] The height adjustment component 1 can provide an adjustable elevation main vertical load-bearing unit; the top can bear the vertical load of the unloading beam device 6 and the formwork support system 7, and distribute the load among the four columns 11 through the connection system to ensure overall rigidity and stability.

[0038] Reference Figure 3 The fixed height component 2 includes straight leg support columns 21 and inclined leg support columns 22. Two straight leg support columns 21 are arranged at the endpoints of the short side of one side of the rectangle; two inclined leg support columns 22 are arranged at the endpoints of the short side on the opposite side. The inclined leg support columns 22 are arranged at an angle relative to the straight leg support columns 21, forming a rigid triangular truss.

[0039] In this embodiment, the bottom ends of both the straight leg support column 21 and the inclined leg support column 22 are connected and fixed to the foundation by the vertical anchoring device 4.

[0040] The straight-leg support column 21 and the inclined-leg support column 22 are connected by a support system 23, as shown in the reference. Figure 5 The support system 23 is composed of several horizontal and diagonal braces, which are used to connect the straight leg support column 21 and the diagonal leg support column 22 to form stable lateral and torsional constraints. The support system 23 is connected to the straight leg support column 21 and the diagonal leg support column 22 by welding at the joints.

[0041] Rigid nodes 24 are provided at the top of the straight-leg support column 21 and the inclined-leg support column 22. The rigid node 24 is composed of a node plate and stiffeners. One side of the node plate is connected to the top of the straight-leg support column 21 and the inclined-leg support column 22, and the other side is connected to the horizontal support component 2 by welding. The nodes are connected by double-sided fillet welds.

[0042] The fixed height component 2 can provide lateral bearing and foundation support at a fixed elevation, and transfer vertical and lateral loads to the vertical anchoring device 4 and the horizontal anchoring device 5 of the pier body, forming a stable pier side support unit.

[0043] Reference Figure 4 The horizontal support assembly 3 includes a brace 31 and an adjusting sleeve 32. The brace 31 is made of multiple circular steel pipes, and an adjusting sleeve 32 is provided on one side of the brace 31. The adjusting sleeve 32 is a circular steel pipe with an inner diameter larger than the outer diameter of the brace 31, and its length is adjusted and locked through a pin hole or threaded adjustment component. The other end of the adjusting sleeve 32 is connected to the rigid node 24 at the top of the inclined leg support column 22.

[0044] The fixing system 33 consists of a corner frame made of crossbeams and angle steel, which is used to fix the bracing 31.

[0045] In this embodiment, two height support components 2 are provided, and the two height support components 2 are connected by a horizontal support component 3. The height support components 2 are symmetrically arranged, specifically: the straight leg support columns 21 of the different fixed height support components 2 are far apart from each other; the inclined leg support columns 22 of the different fixed height support components 2 are close to each other, and the top of the inclined leg support column 22 is connected to the horizontal support component 3 through a rigid node 24.

[0046] By changing the length of the adjusting sleeve 32, the horizontal distance between the two height support components 2 can be adjusted, and the fixing system 33 ensures the fixation of the horizontal support component 3, thereby ensuring that the horizontal load is balanced in terms of internal forces of the structure and does not cause excessive displacement or rotation.

[0047] The bottom of the height support component 2 is connected to the bearing platform through the vertical anchoring device 4, and horizontal anchoring devices 5 are provided on both sides of the straight leg support column 21.

[0048] Specifically: The vertical anchoring device 4 consists of a pre-embedded steel plate in the pier cap, anchor bolts, and matching pads. The bottom end of the fixed height component 2 is connected to the pre-embedded steel plate in the pier cap by bolts, bearing and transferring the vertical load to the pier cap and foundation.

[0049] The horizontal anchoring device 5 includes lateral embedded parts in the pier body and connecting bolts. The horizontal anchoring device 5 is used to connect the top rigid node 24 of the fixed height component 2 to the pier body by bolts, resisting horizontal loads and lateral forces during construction, and preventing lateral displacement or overall slippage.

[0050] The column head 14 of column 11 is equipped with a drop beam device 6. The top of the drop beam device 6 can be equipped with a casting formwork support system 7, and the drop beam device 6 can unload the support after the casting of the formwork support system 7 is completed.

[0051] In this embodiment, the unloading beam device 6 is specifically structured as a steel cylinder filled with iron sand. When unloading is required after the formwork support system 7 has been poured, the unloading beam device 6 can be unloaded by opening a pre-drilled hole at the bottom of the cylinder and drawing out the iron sand from the hole.

[0052] The unloading beam device 6 supports the formwork support system 7 and automatically or manually releases it after the pouring is completed and the concrete reaches the required strength, so that the support is freed from bearing permanent loads and can be quickly dismantled and reused.

[0053] The formwork support system 7 consists of beams, supports, brackets, cross braces, and connectors. It is used to directly support the formwork and wet concrete loads, which are transferred to the height support components through the drop beams. The formwork support system 7 can be reinforced and strengthened according to the design load requirements and can be fabricated as a whole off-site.

[0054] In this embodiment, the bottom of the column 11 is connected to the top of the straight leg support column 21 or the top of the inclined leg support column 22 via the connecting flange 13.

[0055] The flange at the bottom of column 11 is bolted to the fixed height assembly 2, and a positioning key or pin is set on the connection surface to control the relative position and prevent loosening. The flange edge weld meets the requirements for axial and shear force transmission.

[0056] The adjusting sleeve 32 is locked to the locking nut by a pin in the pin hole or a threaded adjusting part; at the same time, an anti-rotation key or keyway is provided at the long span to prevent the sleeve from rotating under bending moment.

[0057] The beam unloading device 6 is connected to the column head 14 by a detachable pin; after release, the beam unloading device 6 is separated from the formwork support system 7.

[0058] The embedded parts of the vertical anchoring device 4 and the horizontal anchoring device 5 are arranged according to the load-bearing calculation. The connecting bolts are high-strength anchors with anti-corrosion treatment. The bolt holes and flange and node holes are processed off-site with tolerances.

[0059] This embodiment also discloses a rapid construction method for cast-in-place supports that can be applied to changes in height and span.

[0060] A rapid construction method for cast-in-place scaffolding that is applicable to variations in height and span, using the cast-in-place scaffolding for construction, includes the following steps: S1. Off-site, manufacture the template support system 7, unloading beam device 6, height adjustment component 1, height fixing component 2, horizontal support component 3, vertical anchoring device 4, and horizontal anchoring device 5 according to the drawings. Then, number and mark them, and pre-assemble them.

[0061] S2. Before pouring the foundation, embed vertical anchoring devices 4 at the corresponding positions of the foundation according to the design, and embed horizontal anchoring devices 5 at the corresponding positions of the pier body. Construct the foundation and pier body.

[0062] S3. The fixed height components 2 on both sides are installed as a whole using lifting equipment. The bottom end of the fixed height components 2 is connected to the vertical anchoring device 4, and the top end of the fixed height components 2 is provided with a rigid node 24 and is connected and fixed to the pier body through the horizontal anchoring device 5.

[0063] S4. Install the horizontal support assembly 3. The horizontal support assembly 3 includes a brace 31 and an adjusting sleeve 32. The brace 31 is connected to the inclined leg support column 22 through a rigid node 24. Control the length of the adjusting sleeve 32 and connect the adjusting sleeve 32 to the inclined leg support column 22 on the other side to ensure that the horizontal load is balanced in the internal forces of the structure.

[0064] S5. Install the height adjustment component 11 and connect it to the fixed height component 2 via the connecting flange 13. Set up the connection system 12, support system 23, and fixing system 33 as required to ensure the stability of the overall structure.

[0065] S6. Install the unloading beam device 6 and connect it to the height adjustment component 2. After adjusting the elevation of the unloading beam device 6, install the formwork support system to complete the installation of the cast-in-place support.

[0066] In step S4, the rigid node 24 can simultaneously bear the vertical load and transfer the horizontal load to the horizontal support component 3.

[0067] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cast-in-place support system adaptable to variations in height and span, comprising: Multiple piers, with supports installed on the sides of each pier. Its features are: The support frame includes a height support component and a horizontal support component, with the height support component provided on both sides of the horizontal support component; The height support assembly includes a height adjustment assembly and a height fixing assembly; the height adjustment assembly includes uprights located at the four corners of a rectangle, and the height of the uprights can be adjusted. The column is provided with a column head at the top and a connecting flange at the bottom. The top of the column is connected by a connecting system. The fixed height assembly includes two straight-leg support columns and two inclined-leg support columns. The straight-leg support columns are respectively located at the endpoints of the short side of one side of the rectangle, and the inclined-leg support columns are located at the endpoints of the short side of the other side of the rectangle. The straight-leg support columns and the inclined-leg support columns are connected by a support system. The bottom of the height adjustment component and the top of the height fixing component are connected by the connecting flange; The horizontal support assembly includes a brace and an adjusting sleeve. One side of the adjusting sleeve is connected to the brace, and the other side is connected to the top of the inclined leg support column. The side of the brace away from the adjusting sleeve is connected to the top of another inclined leg support column. The brace and the adjusting sleeve are connected by a fixing system. The adjusting sleeve can adjust the horizontal distance between the two height support assemblies. The horizontal support component is used to limit the horizontal displacement of the height support component and balance the horizontal load during construction.

2. The cast-in-place support system according to claim 1, which is applicable to variations in height and span, is characterized in that: The bottom of the height support component is connected to the pier via a vertical anchoring device, and horizontal anchoring devices are provided on both sides of the straight leg support column.

3. A cast-in-place support system applicable to variations in height and span according to claim 2, characterized in that: The top of both the straight-leg support column and the inclined-leg support column is provided with a rigid node. The rigid node includes a node plate and a stiffener. The rigid node is connected to the brace by a double-sided fillet weld.

4. A cast-in-place support system adaptable to variations in height and span as described in claim 2, characterized in that: The horizontal anchoring device includes a lateral embedded part on the pier body and a connecting bolt. One side of the lateral embedded part is set on the surface of the pier body by a climbing cone, and the other side is connected to the top of the straight leg support column by the connecting bolt.

5. A cast-in-place support system applicable to variations in height and span as described in claim 1, characterized in that: The adjusting sleeve includes an outer sleeve and an inner core tube, and its length can be adjusted and locked through a pin hole or a threaded adjusting component.

6. A cast-in-place support system adaptable to variations in height and span as described in claim 2, characterized in that: The vertical anchoring device includes a pre-embedded steel plate in the bearing platform and bolts. The pre-embedded steel plate in the bearing platform is connected to the straight leg support column or the inclined leg support column through the bolts. The load of the bracket is transferred from the height support component to the vertical anchoring device and then to the bearing platform.

7. A cast-in-place support system applicable to variations in height and span as described in claim 1, characterized in that: The top of the column head is equipped with a dismantling beam device, which can be used to cast a formwork support system. The dismantling beam device can unload the support after the formwork support system is cast.

8. A cast-in-place support system adaptable to variations in height and span according to any one of claims 1-7, characterized in that: The height support components, fixed height components, horizontal support components, vertical anchoring devices, unloading beam devices, and formwork support systems are fabricated off-site and installed by hoisting.

9. A rapid construction method for cast-in-place scaffolding applicable to variations in height and span, characterized in that: Assembling and processing a cast-in-place support system as described in any one of claims 1 to 8, which is adaptable to variations in height and span, includes the following steps: S1. Off-site fabrication and manufacturing of formwork support systems, unloading beam devices, height adjustment components, height fixing components, horizontal support components, vertical anchoring devices, and horizontal anchoring devices according to drawings; S2. Before the foundation is poured, vertical anchoring devices are pre-embedded at the corresponding positions of the foundation according to the design, and horizontal anchoring devices are pre-embedded at the corresponding positions of the pier body, and the foundation and pier body are constructed. S3. The lifting equipment is used to install the fixed height components on both sides as a whole. The bottom end of the fixed height component is connected to the vertical anchoring device, and the top end of the fixed height component is set as a rigid node and is connected and fixed to the pier body through the horizontal anchoring device. S4. Install the horizontal support assembly, which includes a brace and an adjusting sleeve. The brace is connected to the inclined leg support column through a rigid node. Adjust the length of the adjusting sleeve and connect the adjusting sleeve to the inclined leg support column on the other side, and ensure that the horizontal load is balanced in the internal forces of the structure. S5. Install the height adjustment component and connect it to the fixed height component via a connecting flange. Set up the connection system, support system, and fixing system as needed to ensure overall stability. S6. Install the unloading beam device and connect it to the height adjustment component. After adjusting the elevation of the unloading beam device, install the formwork support system to complete the installation of the cast-in-place support.

10. A rapid construction method for cast-in-place supports applicable to variations in height and span, as described in claim 9, characterized in that: In S4, the rigid node simultaneously bears the vertical load and transfers the horizontal load to the horizontal support component.

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